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SimulIDE 1.1.0 Program Counter crash, 8051

#1 · October 13, 2024, 3:10 am

Quote from ivo on October 13, 2024, 3:10 am

I get this crash trying to run my 8051 code, using SDCC. It used to work in 1.0.

Overall I want to count using event timer on P3_5, and display count on LCD. Previously, I could never get the event timer to work. Now in 1.1.0 I commented the functional code to only print LCD, but it still crashes, I don't know why?

STC89 datasheet

[spoiler title=""]

Warning: Simulator::addEvent Repeated event 8051-47-I51Core

eMcu::stepCpu: Error PC = 4096 PGM size = 4096

MCU stopped

Simulation Stopped

[/spoiler]

[spoiler title="main.c"]

#include <stc89.h>
#include <stdio.h>
#include <limits.h>

#define Nop() __asm  nop __endasm

void delay_ms(unsigned int );
void lcd_init(void);
void lcd_cmd(unsigned char );
void lcd_char(unsigned char );
void lcd_clear(void);
void lcd_home(void);
void lcd_string(char* );
void lcd_long(unsigned long);
void count_t1_freq(void);
int putchar(int c);



#define CLEAR 0x01
#define HOME 0x02

#define RS P2_4
#define RW P2_3
#define EN P2_2
#define LCD_DATA P0

#define LED P1_0
#define UF_BTN P3_6



unsigned short duty_on = 0;
unsigned short duty_off = 0;

unsigned int timer1_of = 0;
unsigned long count_result = 0;
volatile char counting = 0;

void interrupt0_isr(void) __interrupt(IE0_VECTOR) {
	
}

void timer0_isr(void) __interrupt(TF0_VECTOR) {
	// Stop timers
	TR0 = 0; TR1 = 0;
	// Calculate result of timer 1
	count_result = ((unsigned long)TL1) + (((unsigned long)TH1) << 8);
	count_result += ((unsigned long)timer1_of) * ((unsigned long)65536);
	counting = 0;
}

// Counts overflows
void timer1_isr(void) __interrupt(TF1_VECTOR) {
	timer1_of++;
}

void count_t1_freq(void) {
	counting = 1;
	count_result = 0;
	// Disable timers
	TR0 = 0; TR1 = 0;
	// Enable timer edge interrupts
	IT0 = 1; IT1 = 1;
	// Enable overflow interrupts
	ET0 = 1; ET1 = 1;
	// Clear gate so TRx controls timers
	TMOD &= ~T0_GATE;
	TMOD &= ~T0_GATE;
	// Set timer modes to 16-bit cascaded
	TMOD |= T0_M0;
	TMOD &= ~T0_M1;
	TMOD |= T1_M0;
	TMOD &= ~T1_M1;
	// T0 in timing mode, T1 in counting mode
	TMOD &= ~T0_CT;
	TMOD |= T1_CT;
	// Reset timer counts;
	TL0 = 0; TH0 = 0;
	TL1 = 0; TH1 = 0;
	// Reset overflow
	timer1_of = 0;
	// Start timers
	TR0 = 1; TR1 = 1;
}

int main(void) {
	EA = 1; // enable interrupts
	EX0 = 0; EX1 = 0; // Disable external interrupts
	
	IP = 0x02; // timer0 interrupt prio high
	IPH = 0x02; // timer0 interrupt prio highest
	lcd_init();
	while (1) {
		lcd_clear();
		lcd_string("Counting..");
		delay_ms(500);
		/*count_t1_freq();
		while (counting) {}
		lcd_clear();
		lcd_string("c: ");
		delay_ms(100);
		lcd_long(count_result);
		//printf_fast("%d Hz", 5);
		delay_ms(1000);*/
	}
}

void delay_ms(unsigned int count) {
    unsigned int i, j;
	count--;
    for (i = 0; i < count; i++) {
        for (j = 0; j < 142; j++) {
			Nop();
        }
		Nop();Nop();Nop();Nop();Nop();
    }
}


volatile void lcd_init(void) {
	// Set 8-bit, 8 height font 3 times to ensure correct setting
	lcd_cmd(0x38);
	lcd_cmd(0x38);
	lcd_cmd(0x38);
	lcd_cmd(0x0C); // Turn on display
	lcd_clear();
	lcd_home();
}

void lcd_clear(void) {
	RS = 0;
	RW = 0;
	LCD_DATA = CLEAR;
	EN = 1; delay_ms(1); EN = 0;
	delay_ms(4);
}

void lcd_home(void) {
	RS = 0;
	RW = 0;
	LCD_DATA = HOME;
	EN = 1; delay_ms(1); EN = 0;
	delay_ms(4);
}

void lcd_cmd(unsigned char cmd) {
	RS = 0;
	RW = 0;
	LCD_DATA = cmd;
	EN = 1; delay_ms(1); EN = 0;
	delay_ms(2);
}

int putchar(int c) {
	lcd_char((unsigned char)c);
	return c;
}

void lcd_char(unsigned char data) {	
	RS = 1;
	RW = 0;
	LCD_DATA = data;
	EN = 1; delay_ms(1); EN = 0;
	delay_ms(2);
}

void lcd_string(char* str) {
	while (*str != '\0') {
		lcd_char(*str);
		str++;
	}
}

void lcd_long(unsigned long num) {
	unsigned long temp = num / 10;
	int tens = 1;
	while (temp > 0) {
		tens *= 10;
		temp /= 10;
	}
	while (tens > 0) {
		switch ((num / tens) % 10) {
			case 0:
				lcd_char('0');
				break;
			case 1:
				lcd_char('1');
				break;
			case 2:
				lcd_char('2');
				break;
			case 3:
				lcd_char('3');
				break;
			case 4:
				lcd_char('4');
				break;
			case 5:
				lcd_char('5');
				break;
			case 6:
				lcd_char('6');
				break;
			case 7:
				lcd_char('7');
				break;
			case 8:
				lcd_char('8');
				break;
			case 9:
				lcd_char('9');
				break;
		}
		tens /= 10;
	}
}

[/spoiler]

I get this crash trying to run my 8051 code, using SDCC. It used to work in 1.0.

STC89 datasheet

Spoiler

Warning: Simulator::addEvent Repeated event 8051-47-I51Core

eMcu::stepCpu: Error PC = 4096 PGM size = 4096

MCU stopped

Simulation Stopped

main.c

#include <stc89.h>
#include <stdio.h>
#include <limits.h>

#define Nop() __asm  nop __endasm

void delay_ms(unsigned int );
void lcd_init(void);
void lcd_cmd(unsigned char );
void lcd_char(unsigned char );
void lcd_clear(void);
void lcd_home(void);
void lcd_string(char* );
void lcd_long(unsigned long);
void count_t1_freq(void);
int putchar(int c);



#define CLEAR 0x01
#define HOME 0x02

#define RS P2_4
#define RW P2_3
#define EN P2_2
#define LCD_DATA P0

#define LED P1_0
#define UF_BTN P3_6



unsigned short duty_on = 0;
unsigned short duty_off = 0;

unsigned int timer1_of = 0;
unsigned long count_result = 0;
volatile char counting = 0;

void interrupt0_isr(void) __interrupt(IE0_VECTOR) {
	
}

void timer0_isr(void) __interrupt(TF0_VECTOR) {
	// Stop timers
	TR0 = 0; TR1 = 0;
	// Calculate result of timer 1
	count_result = ((unsigned long)TL1) + (((unsigned long)TH1) << 8);
	count_result += ((unsigned long)timer1_of) * ((unsigned long)65536);
	counting = 0;
}

// Counts overflows
void timer1_isr(void) __interrupt(TF1_VECTOR) {
	timer1_of++;
}

void count_t1_freq(void) {
	counting = 1;
	count_result = 0;
	// Disable timers
	TR0 = 0; TR1 = 0;
	// Enable timer edge interrupts
	IT0 = 1; IT1 = 1;
	// Enable overflow interrupts
	ET0 = 1; ET1 = 1;
	// Clear gate so TRx controls timers
	TMOD &= ~T0_GATE;
	TMOD &= ~T0_GATE;
	// Set timer modes to 16-bit cascaded
	TMOD |= T0_M0;
	TMOD &= ~T0_M1;
	TMOD |= T1_M0;
	TMOD &= ~T1_M1;
	// T0 in timing mode, T1 in counting mode
	TMOD &= ~T0_CT;
	TMOD |= T1_CT;
	// Reset timer counts;
	TL0 = 0; TH0 = 0;
	TL1 = 0; TH1 = 0;
	// Reset overflow
	timer1_of = 0;
	// Start timers
	TR0 = 1; TR1 = 1;
}

int main(void) {
	EA = 1; // enable interrupts
	EX0 = 0; EX1 = 0; // Disable external interrupts
	
	IP = 0x02; // timer0 interrupt prio high
	IPH = 0x02; // timer0 interrupt prio highest
	lcd_init();
	while (1) {
		lcd_clear();
		lcd_string("Counting..");
		delay_ms(500);
		/*count_t1_freq();
		while (counting) {}
		lcd_clear();
		lcd_string("c: ");
		delay_ms(100);
		lcd_long(count_result);
		//printf_fast("%d Hz", 5);
		delay_ms(1000);*/
	}
}

void delay_ms(unsigned int count) {
    unsigned int i, j;
	count--;
    for (i = 0; i < count; i++) {
        for (j = 0; j < 142; j++) {
			Nop();
        }
		Nop();Nop();Nop();Nop();Nop();
    }
}


volatile void lcd_init(void) {
	// Set 8-bit, 8 height font 3 times to ensure correct setting
	lcd_cmd(0x38);
	lcd_cmd(0x38);
	lcd_cmd(0x38);
	lcd_cmd(0x0C); // Turn on display
	lcd_clear();
	lcd_home();
}

void lcd_clear(void) {
	RS = 0;
	RW = 0;
	LCD_DATA = CLEAR;
	EN = 1; delay_ms(1); EN = 0;
	delay_ms(4);
}

void lcd_home(void) {
	RS = 0;
	RW = 0;
	LCD_DATA = HOME;
	EN = 1; delay_ms(1); EN = 0;
	delay_ms(4);
}

void lcd_cmd(unsigned char cmd) {
	RS = 0;
	RW = 0;
	LCD_DATA = cmd;
	EN = 1; delay_ms(1); EN = 0;
	delay_ms(2);
}

int putchar(int c) {
	lcd_char((unsigned char)c);
	return c;
}

void lcd_char(unsigned char data) {	
	RS = 1;
	RW = 0;
	LCD_DATA = data;
	EN = 1; delay_ms(1); EN = 0;
	delay_ms(2);
}

void lcd_string(char* str) {
	while (*str != '\0') {
		lcd_char(*str);
		str++;
	}
}

void lcd_long(unsigned long num) {
	unsigned long temp = num / 10;
	int tens = 1;
	while (temp > 0) {
		tens *= 10;
		temp /= 10;
	}
	while (tens > 0) {
		switch ((num / tens) % 10) {
			case 0:
				lcd_char('0');
				break;
			case 1:
				lcd_char('1');
				break;
			case 2:
				lcd_char('2');
				break;
			case 3:
				lcd_char('3');
				break;
			case 4:
				lcd_char('4');
				break;
			case 5:
				lcd_char('5');
				break;
			case 6:
				lcd_char('6');
				break;
			case 7:
				lcd_char('7');
				break;
			case 8:
				lcd_char('8');
				break;
			case 9:
				lcd_char('9');
				break;
		}
		tens /= 10;
	}
}

#2 · October 13, 2024, 3:12 am

Quote from ivo on October 13, 2024, 3:12 am

If I try to upload my sim1 file, it simply does not appear after clicking submit. I'll paste it text.

[spoiler title="8051.sim1"]

<circuit version="1.1.0-SR0" rev="1917" stepSize="1000000" stepsPS="1000000" NLsteps="100000" reaStep="1000000" animate="0" >

<item itemtype="Resistor" CircId="Resistor-34" mainComp="false" ShowProp="Resistance" Show_id="false" Show_Val="true" Pos="-1444,-1008" rotation="0" hflip="1" vflip="1" label="Resistor-34" idLabPos="-16,-24" labelrot="0" valLabPos="-16,6" valLabRot="0" Resistance="100 Ω" />

<item itemtype="Led" CircId="Led-35" mainComp="false" Show_id="false" Show_Val="false" Pos="-1396,-1008" rotation="0" hflip="-1" vflip="1" label="Led-35" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Color="Red" Grounded="false" Threshold="1.8 V" MaxCurrent="0.03 A" Resistance="0.6 Ω" />

<item itemtype="Ground" CircId="Ground-42" mainComp="false" Show_id="false" Show_Val="false" Pos="-1488,-964" rotation="0" hflip="1" vflip="1" label="Ground-42" idLabPos="-16,8" labelrot="0" valLabPos="-16,20" valLabRot="0" />

<item itemtype="MCU" CircId="8051-47" mainComp="false" Show_id="true" Show_Val="false" Pos="-1312,-1016" rotation="0" hflip="1" vflip="1" label="8051-47" idLabPos="0,-20" labelrot="0" valLabPos="-16,20" valLabRot="0" Frequency="12 MHz" Program="stc89/build/main.hex" Auto_Load="true" varList="TL0,TH0,TL1,TH1,TCON,TMOD" SerialMon="-1" />

<item itemtype="Buffer" CircId="Buffer-54" mainComp="false" Show_id="false" Show_Val="false" Pos="-1348,-1008" rotation="-180" hflip="1" vflip="1" label="Buffer-54" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Input_High_V="2.5 V" Input_Low_V="2.5 V" Input_Imped="1000 MΩ" Invert_Inputs="false" Out_High_V="5 V" Out_Low_V="0 V" Out_Imped="40 Ω" initHigh="false" Inverted="false" Open_Collector="false" Tristate="false" Tpd_ps="10000 ps" Tr_ps="3000 ps" Tf_ps="4000 ps" />

<item itemtype="Hd44780" CircId="Hd44780-57" mainComp="false" Show_id="true" Show_Val="false" Pos="-1180,-1040" rotation="0" hflip="1" vflip="1" label="Hd44780-57" idLabPos="70,-82" labelrot="0" valLabPos="-16,20" valLabRot="0" Rows="2" Cols="16" />

<item itemtype="Tunnel" CircId="Tunnel-67" mainComp="false" Show_id="false" Show_Val="false" Pos="-972,-992" rotation="0" hflip="-1" vflip="1" label="Tunnel-67" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D3" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-68" mainComp="false" Show_id="false" Show_Val="false" Pos="-972,-968" rotation="0" hflip="-1" vflip="1" label="Tunnel-68" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D0" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-69" mainComp="false" Show_id="false" Show_Val="false" Pos="-972,-1024" rotation="0" hflip="-1" vflip="1" label="Tunnel-69" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D7" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-70" mainComp="false" Show_id="false" Show_Val="false" Pos="-972,-976" rotation="0" hflip="-1" vflip="1" label="Tunnel-70" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D1" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-71" mainComp="false" Show_id="false" Show_Val="false" Pos="-972,-984" rotation="0" hflip="-1" vflip="1" label="Tunnel-71" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D2" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-72" mainComp="false" Show_id="false" Show_Val="false" Pos="-972,-1000" rotation="0" hflip="-1" vflip="1" label="Tunnel-72" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D4" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-73" mainComp="false" Show_id="false" Show_Val="false" Pos="-972,-1016" rotation="0" hflip="-1" vflip="1" label="Tunnel-73" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D6" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-74" mainComp="false" Show_id="false" Show_Val="false" Pos="-972,-1008" rotation="0" hflip="-1" vflip="1" label="Tunnel-74" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D5" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-83" mainComp="false" Show_id="false" Show_Val="false" Pos="-1116,-992" rotation="-90" hflip="1" vflip="1" label="Tunnel-83" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="EN" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-85" mainComp="false" Show_id="false" Show_Val="false" Pos="-1164,-1024" rotation="-90" hflip="1" vflip="1" label="Tunnel-85" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="RS" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-86" mainComp="false" Show_id="false" Show_Val="false" Pos="-1156,-1024" rotation="-90" hflip="1" vflip="1" label="Tunnel-86" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="RW" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-210" mainComp="false" Show_id="false" Show_Val="false" Pos="-1240,-952" rotation="0" hflip="-1" vflip="1" label="Tunnel-210" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D6" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-211" mainComp="false" Show_id="false" Show_Val="false" Pos="-1240,-944" rotation="0" hflip="-1" vflip="1" label="Tunnel-211" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D7" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-212" mainComp="false" Show_id="false" Show_Val="false" Pos="-1240,-976" rotation="0" hflip="-1" vflip="1" label="Tunnel-212" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D3" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-213" mainComp="false" Show_id="false" Show_Val="false" Pos="-1240,-984" rotation="0" hflip="-1" vflip="1" label="Tunnel-213" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D2" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-214" mainComp="false" Show_id="false" Show_Val="false" Pos="-1240,-1000" rotation="0" hflip="-1" vflip="1" label="Tunnel-214" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D0" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-215" mainComp="false" Show_id="false" Show_Val="false" Pos="-1240,-992" rotation="0" hflip="-1" vflip="1" label="Tunnel-215" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D1" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-216" mainComp="false" Show_id="false" Show_Val="false" Pos="-1240,-968" rotation="0" hflip="-1" vflip="1" label="Tunnel-216" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D4" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-217" mainComp="false" Show_id="false" Show_Val="false" Pos="-1240,-960" rotation="0" hflip="-1" vflip="1" label="Tunnel-217" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D5" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-245" mainComp="false" Show_id="false" Show_Val="false" Pos="-1244,-872" rotation="0" hflip="-1" vflip="1" label="Tunnel-245" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="EN" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-246" mainComp="false" Show_id="false" Show_Val="false" Pos="-1244,-880" rotation="0" hflip="-1" vflip="1" label="Tunnel-246" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="RW" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-247" mainComp="false" Show_id="false" Show_Val="false" Pos="-1244,-888" rotation="0" hflip="-1" vflip="1" label="Tunnel-247" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="RS" IsBus="false" />

<item itemtype="Buffer" CircId="Buffer-351" mainComp="false" Show_id="false" Show_Val="false" Pos="-1004,-1024" rotation="-180" hflip="1" vflip="1" label="Buffer-351" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Input_High_V="2.5 V" Input_Low_V="2.5 V" Input_Imped="1000 MΩ" Invert_Inputs="false" Out_High_V="5 V" Out_Low_V="0 V" Out_Imped="40 Ω" initHigh="false" Inverted="false" Open_Collector="false" Tristate="false" Tpd_ps="10000 ps" Tr_ps="3000 ps" Tf_ps="4000 ps" />

<item itemtype="Buffer" CircId="Buffer-352" mainComp="false" Show_id="false" Show_Val="false" Pos="-1004,-1016" rotation="-180" hflip="1" vflip="1" label="Buffer-352" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Input_High_V="2.5 V" Input_Low_V="2.5 V" Input_Imped="1000 MΩ" Invert_Inputs="false" Out_High_V="5 V" Out_Low_V="0 V" Out_Imped="40 Ω" initHigh="false" Inverted="false" Open_Collector="false" Tristate="false" Tpd_ps="10000 ps" Tr_ps="3000 ps" Tf_ps="4000 ps" />

<item itemtype="Buffer" CircId="Buffer-353" mainComp="false" Show_id="false" Show_Val="false" Pos="-1004,-1008" rotation="-180" hflip="1" vflip="1" label="Buffer-353" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Input_High_V="2.5 V" Input_Low_V="2.5 V" Input_Imped="1000 MΩ" Invert_Inputs="false" Out_High_V="5 V" Out_Low_V="0 V" Out_Imped="40 Ω" initHigh="false" Inverted="false" Open_Collector="false" Tristate="false" Tpd_ps="10000 ps" Tr_ps="3000 ps" Tf_ps="4000 ps" />

<item itemtype="Buffer" CircId="Buffer-354" mainComp="false" Show_id="false" Show_Val="false" Pos="-1004,-1000" rotation="-180" hflip="1" vflip="1" label="Buffer-354" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Input_High_V="2.5 V" Input_Low_V="2.5 V" Input_Imped="1000 MΩ" Invert_Inputs="false" Out_High_V="5 V" Out_Low_V="0 V" Out_Imped="40 Ω" initHigh="false" Inverted="false" Open_Collector="false" Tristate="false" Tpd_ps="10000 ps" Tr_ps="3000 ps" Tf_ps="4000 ps" />

<item itemtype="Buffer" CircId="Buffer-355" mainComp="false" Show_id="false" Show_Val="false" Pos="-1004,-992" rotation="-180" hflip="1" vflip="1" label="Buffer-355" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Input_High_V="2.5 V" Input_Low_V="2.5 V" Input_Imped="1000 MΩ" Invert_Inputs="false" Out_High_V="5 V" Out_Low_V="0 V" Out_Imped="40 Ω" initHigh="false" Inverted="false" Open_Collector="false" Tristate="false" Tpd_ps="10000 ps" Tr_ps="3000 ps" Tf_ps="4000 ps" />

<item itemtype="Buffer" CircId="Buffer-356" mainComp="false" Show_id="false" Show_Val="false" Pos="-1004,-984" rotation="-180" hflip="1" vflip="1" label="Buffer-356" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Input_High_V="2.5 V" Input_Low_V="2.5 V" Input_Imped="1000 MΩ" Invert_Inputs="false" Out_High_V="5 V" Out_Low_V="0 V" Out_Imped="40 Ω" initHigh="false" Inverted="false" Open_Collector="false" Tristate="false" Tpd_ps="10000 ps" Tr_ps="3000 ps" Tf_ps="4000 ps" />

<item itemtype="Buffer" CircId="Buffer-357" mainComp="false" Show_id="false" Show_Val="false" Pos="-1004,-976" rotation="-180" hflip="1" vflip="1" label="Buffer-357" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Input_High_V="2.5 V" Input_Low_V="2.5 V" Input_Imped="1000 MΩ" Invert_Inputs="false" Out_High_V="5 V" Out_Low_V="0 V" Out_Imped="40 Ω" initHigh="false" Inverted="false" Open_Collector="false" Tristate="false" Tpd_ps="10000 ps" Tr_ps="3000 ps" Tf_ps="4000 ps" />

<item itemtype="Buffer" CircId="Buffer-358" mainComp="false" Show_id="false" Show_Val="false" Pos="-1004,-968" rotation="-180" hflip="1" vflip="1" label="Buffer-358" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Input_High_V="2.5 V" Input_Low_V="2.5 V" Input_Imped="1000 MΩ" Invert_Inputs="false" Out_High_V="5 V" Out_Low_V="0 V" Out_Imped="40 Ω" initHigh="false" Inverted="false" Open_Collector="false" Tristate="false" Tpd_ps="10000 ps" Tr_ps="3000 ps" Tf_ps="4000 ps" />

<item itemtype="Tunnel" CircId="Tunnel-431" mainComp="false" Show_id="false" Show_Val="false" Pos="-1132,-876" rotation="0" hflip="1" vflip="1" label="Tunnel-431" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D5" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-432" mainComp="false" Show_id="false" Show_Val="false" Pos="-1132,-892" rotation="0" hflip="1" vflip="1" label="Tunnel-432" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D3" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-433" mainComp="false" Show_id="false" Show_Val="false" Pos="-1132,-900" rotation="0" hflip="1" vflip="1" label="Tunnel-433" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D2" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-434" mainComp="false" Show_id="false" Show_Val="false" Pos="-1132,-908" rotation="0" hflip="1" vflip="1" label="Tunnel-434" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D1" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-435" mainComp="false" Show_id="false" Show_Val="false" Pos="-1132,-868" rotation="0" hflip="1" vflip="1" label="Tunnel-435" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D6" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-436" mainComp="false" Show_id="false" Show_Val="false" Pos="-1132,-884" rotation="0" hflip="1" vflip="1" label="Tunnel-436" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D4" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-437" mainComp="false" Show_id="false" Show_Val="false" Pos="-1132,-916" rotation="0" hflip="1" vflip="1" label="Tunnel-437" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D0" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-438" mainComp="false" Show_id="false" Show_Val="false" Pos="-1132,-860" rotation="0" hflip="1" vflip="1" label="Tunnel-438" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D7" IsBus="false" />

<item itemtype="Resistor" CircId="Resistor-484" mainComp="false" Show_id="false" Show_Val="false" Pos="-1104,-916" rotation="0" hflip="1" vflip="1" label="Resistor-484" idLabPos="-16,-24" labelrot="0" valLabPos="-16,6" valLabRot="0" Resistance="10 kΩ" />

<item itemtype="Resistor" CircId="Resistor-486" mainComp="false" Show_id="false" Show_Val="false" Pos="-1104,-908" rotation="0" hflip="1" vflip="1" label="Resistor-486" idLabPos="-16,-24" labelrot="0" valLabPos="-16,6" valLabRot="0" Resistance="10 kΩ" />

<item itemtype="Resistor" CircId="Resistor-487" mainComp="false" Show_id="false" Show_Val="false" Pos="-1104,-900" rotation="0" hflip="1" vflip="1" label="Resistor-487" idLabPos="-16,-24" labelrot="0" valLabPos="-16,6" valLabRot="0" Resistance="10 kΩ" />

<item itemtype="Resistor" CircId="Resistor-488" mainComp="false" Show_id="false" Show_Val="false" Pos="-1104,-892" rotation="0" hflip="1" vflip="1" label="Resistor-488" idLabPos="-16,-24" labelrot="0" valLabPos="-16,6" valLabRot="0" Resistance="10 kΩ" />

<item itemtype="Resistor" CircId="Resistor-489" mainComp="false" Show_id="false" Show_Val="false" Pos="-1104,-868" rotation="0" hflip="1" vflip="1" label="Resistor-489" idLabPos="-16,-24" labelrot="0" valLabPos="-16,6" valLabRot="0" Resistance="10 kΩ" />

<item itemtype="Resistor" CircId="Resistor-490" mainComp="false" Show_id="false" Show_Val="false" Pos="-1104,-860" rotation="0" hflip="1" vflip="1" label="Resistor-490" idLabPos="-16,-24" labelrot="0" valLabPos="-16,6" valLabRot="0" Resistance="10 kΩ" />

<item itemtype="Resistor" CircId="Resistor-491" mainComp="false" Show_id="false" Show_Val="false" Pos="-1104,-884" rotation="0" hflip="1" vflip="1" label="Resistor-491" idLabPos="-16,-24" labelrot="0" valLabPos="-16,6" valLabRot="0" Resistance="10 kΩ" />

<item itemtype="Resistor" CircId="Resistor-492" mainComp="false" Show_id="false" Show_Val="false" Pos="-1104,-876" rotation="0" hflip="1" vflip="1" label="Resistor-492" idLabPos="-16,-24" labelrot="0" valLabPos="-16,6" valLabRot="0" Resistance="10 kΩ" />

<item itemtype="Tunnel" CircId="Tunnel-500" mainComp="false" Show_id="false" Show_Val="false" Pos="-1348,-1052" rotation="0" hflip="-1" vflip="1" label="Tunnel-500" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="Vcc" IsBus="false" />

<item itemtype="Rail" CircId="Rail-504" mainComp="false" ShowProp="Voltage" Show_id="false" Show_Val="true" Pos="-1372,-1052" rotation="0" hflip="1" vflip="1" label="Rail-504" idLabPos="-16,-24" labelrot="0" valLabPos="-16,8" valLabRot="0" Voltage="5 V" />

<item itemtype="Ground" CircId="Ground-511" mainComp="false" Show_id="false" Show_Val="false" Pos="-1416,-920" rotation="0" hflip="1" vflip="1" label="Ground-511" idLabPos="-16,8" labelrot="0" valLabPos="-16,20" valLabRot="0" />

<item itemtype="Tunnel" CircId="Tunnel-513" mainComp="false" Show_id="false" Show_Val="false" Pos="-1052,-916" rotation="0" hflip="-1" vflip="1" label="Tunnel-513" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="Vcc" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-595" mainComp="false" Show_id="false" Show_Val="false" Pos="-1328,-928" rotation="0" hflip="1" vflip="1" label="Tunnel-595" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="TX" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-596" mainComp="false" Show_id="false" Show_Val="false" Pos="-1328,-936" rotation="0" hflip="1" vflip="1" label="Tunnel-596" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="RX" IsBus="false" />

<item itemtype="Clock" CircId="Clock-611" mainComp="false" Show_id="false" Show_Val="false" Pos="-1360,-896" rotation="0" hflip="1" vflip="1" label="Clock-611" idLabPos="-64,-24" labelrot="0" valLabPos="-16,8" valLabRot="0" Out="true" Running="true" Voltage="5 V" Freq="22345 Hz" Always_On="true" />

<item itemtype="Oscope" CircId="Oscope-613" mainComp="false" Show_id="false" Show_Val="false" Pos="-1804,-824" rotation="0" hflip="1" vflip="1" label="Oscope-613" idLabPos="-90,-100" labelrot="0" valLabPos="-16,20" valLabRot="0" Basic_X="135 _px" Basic_Y="135 _px" BufferSize="600000 Samples" connectGnd="true" InputImped="10 MΩ" TimDiv="1000000000" TimPos="0,0,0,0," VolDiv="1,1,1,1," Tunnels=",,,," Trigger="4" Filter="0.1 V" Trigger="4" AutoSC="4" Tracks="1" HideCh="false,false,false,false," VolPos="0,0,0,0," />

<item itemtype="FreqMeter" CircId="FreqMeter-614" mainComp="false" Show_id="false" Show_Val="false" Pos="-1280,-800" rotation="0" hflip="1" vflip="1" label="FreqMeter-614" idLabPos="-32,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Filter="0.1 V" />

<item itemtype="Oscope" CircId="Oscope-624" mainComp="false" Show_id="false" Show_Val="false" Pos="-1072,-748" rotation="0" hflip="1" vflip="1" label="Oscope-624" idLabPos="-90,-100" labelrot="0" valLabPos="-16,20" valLabRot="0" Basic_X="135 _px" Basic_Y="135 _px" BufferSize="600000 Samples" connectGnd="true" InputImped="10 MΩ" TimDiv="20000000" TimPos="0,0,0,0," VolDiv="2,2,2,2," Tunnels=",,,," Trigger="0" Filter="1 V" Trigger="0" AutoSC="4" Tracks="1" HideCh="false,false,false,false," VolPos="0,0,0,0," />

<item itemtype="Node" CircId="Node-516" mainComp="false" Pos="-1076,-916" />

<item itemtype="Node" CircId="Node-519" mainComp="false" Pos="-1076,-908" />

<item itemtype="Node" CircId="Node-522" mainComp="false" Pos="-1076,-900" />

<item itemtype="Node" CircId="Node-525" mainComp="false" Pos="-1076,-892" />

<item itemtype="Node" CircId="Node-528" mainComp="false" Pos="-1076,-884" />

<item itemtype="Node" CircId="Node-531" mainComp="false" Pos="-1076,-876" />

<item itemtype="Node" CircId="Node-534" mainComp="false" Pos="-1076,-868" />

<item itemtype="Node" CircId="Node-616" mainComp="false" Pos="-1336,-896" />

<item itemtype="Node" CircId="Node-626" mainComp="false" Pos="-1336,-832" />

<item itemtype="Connector" uid="connector-535" startpinid="Resistor-34-rPin" endpinid="Led-35-rPin" pointList="-1428,-1008,-1412,-1008" />

<item itemtype="Connector" uid="connector-536" startpinid="Ground-42-Gnd" endpinid="Resistor-34-lPin" pointList="-1488,-980,-1488,-1008,-1460,-1008" />

<item itemtype="Connector" uid="connector-537" startpinid="8051-47-PORT10" endpinid="Buffer-54-in0" pointList="-1320,-1008,-1332,-1008" />

<item itemtype="Connector" uid="connector-538" startpinid="Buffer-54-out" endpinid="Led-35-lPin" pointList="-1364,-1008,-1380,-1008" />

<item itemtype="Connector" uid="connector-539" startpinid="Hd44780-57-PinEn" endpinid="Tunnel-83-pin" pointList="-1148,-1032,-1148,-992,-1116,-992" />

<item itemtype="Connector" uid="connector-540" startpinid="Tunnel-86-pin" endpinid="Hd44780-57-PinRW" pointList="-1156,-1024,-1156,-1032" />

<item itemtype="Connector" uid="connector-541" startpinid="Tunnel-85-pin" endpinid="Hd44780-57-PinRS" pointList="-1164,-1024,-1164,-1032" />

<item itemtype="Connector" uid="connector-542" startpinid="Tunnel-214-pin" endpinid="8051-47-PORT00" pointList="-1240,-1000,-1256,-1000" />

<item itemtype="Connector" uid="connector-543" startpinid="8051-47-PORT01" endpinid="Tunnel-215-pin" pointList="-1256,-992,-1240,-992" />

<item itemtype="Connector" uid="connector-544" startpinid="Tunnel-213-pin" endpinid="8051-47-PORT02" pointList="-1240,-984,-1256,-984" />

<item itemtype="Connector" uid="connector-545" startpinid="8051-47-PORT03" endpinid="Tunnel-212-pin" pointList="-1256,-976,-1240,-976" />

<item itemtype="Connector" uid="connector-546" startpinid="Tunnel-216-pin" endpinid="8051-47-PORT04" pointList="-1240,-968,-1256,-968" />

<item itemtype="Connector" uid="connector-547" startpinid="8051-47-PORT05" endpinid="Tunnel-217-pin" pointList="-1256,-960,-1240,-960" />

<item itemtype="Connector" uid="connector-548" startpinid="Tunnel-210-pin" endpinid="8051-47-PORT06" pointList="-1240,-952,-1256,-952" />

<item itemtype="Connector" uid="connector-549" startpinid="8051-47-PORT07" endpinid="Tunnel-211-pin" pointList="-1256,-944,-1240,-944" />

<item itemtype="Connector" uid="connector-550" startpinid="8051-47-PORT24" endpinid="Tunnel-247-pin" pointList="-1256,-888,-1244,-888" />

<item itemtype="Connector" uid="connector-551" startpinid="Tunnel-246-pin" endpinid="8051-47-PORT23" pointList="-1244,-880,-1256,-880" />

<item itemtype="Connector" uid="connector-552" startpinid="8051-47-PORT22" endpinid="Tunnel-245-pin" pointList="-1256,-872,-1244,-872" />

<item itemtype="Connector" uid="connector-553" startpinid="Tunnel-68-pin" endpinid="Buffer-358-in0" pointList="-972,-968,-988,-968" />

<item itemtype="Connector" uid="connector-554" startpinid="Tunnel-72-pin" endpinid="Buffer-354-in0" pointList="-972,-1000,-988,-1000" />

<item itemtype="Connector" uid="connector-555" startpinid="Buffer-355-in0" endpinid="Tunnel-67-pin" pointList="-988,-992,-972,-992" />

<item itemtype="Connector" uid="connector-556" startpinid="Tunnel-71-pin" endpinid="Buffer-356-in0" pointList="-972,-984,-988,-984" />

<item itemtype="Connector" uid="connector-557" startpinid="Buffer-357-in0" endpinid="Tunnel-70-pin" pointList="-988,-976,-972,-976" />

<item itemtype="Connector" uid="connector-558" startpinid="Tunnel-74-pin" endpinid="Buffer-353-in0" pointList="-972,-1008,-988,-1008" />

<item itemtype="Connector" uid="connector-559" startpinid="Buffer-352-in0" endpinid="Tunnel-73-pin" pointList="-988,-1016,-972,-1016" />

<item itemtype="Connector" uid="connector-560" startpinid="Tunnel-69-pin" endpinid="Buffer-351-in0" pointList="-972,-1024,-988,-1024" />

<item itemtype="Connector" uid="connector-561" startpinid="Buffer-351-out" endpinid="Hd44780-57-dataPin7" pointList="-1020,-1024,-1084,-1024,-1084,-1032" />

<item itemtype="Connector" uid="connector-562" startpinid="Buffer-352-out" endpinid="Hd44780-57-dataPin6" pointList="-1020,-1016,-1092,-1016,-1092,-1032" />

<item itemtype="Connector" uid="connector-563" startpinid="Buffer-353-out" endpinid="Hd44780-57-dataPin5" pointList="-1020,-1008,-1100,-1008,-1100,-1032" />

<item itemtype="Connector" uid="connector-564" startpinid="Buffer-354-out" endpinid="Hd44780-57-dataPin4" pointList="-1020,-1000,-1108,-1000,-1108,-1032" />

<item itemtype="Connector" uid="connector-565" startpinid="Buffer-355-out" endpinid="Hd44780-57-dataPin3" pointList="-1020,-992,-1116,-992,-1116,-1032" />

<item itemtype="Connector" uid="connector-566" startpinid="Buffer-356-out" endpinid="Hd44780-57-dataPin2" pointList="-1020,-984,-1124,-984,-1124,-1032" />

<item itemtype="Connector" uid="connector-567" startpinid="Buffer-357-out" endpinid="Hd44780-57-dataPin1" pointList="-1020,-976,-1132,-976,-1132,-1032" />

<item itemtype="Connector" uid="connector-568" startpinid="Buffer-358-out" endpinid="Hd44780-57-dataPin0" pointList="-1020,-968,-1140,-968,-1140,-1032" />

<item itemtype="Connector" uid="connector-569" startpinid="Tunnel-437-pin" endpinid="Resistor-484-lPin" pointList="-1132,-916,-1120,-916" />

<item itemtype="Connector" uid="connector-570" startpinid="Tunnel-434-pin" endpinid="Resistor-486-lPin" pointList="-1132,-908,-1120,-908" />

<item itemtype="Connector" uid="connector-571" startpinid="Tunnel-433-pin" endpinid="Resistor-487-lPin" pointList="-1132,-900,-1120,-900" />

<item itemtype="Connector" uid="connector-572" startpinid="Tunnel-432-pin" endpinid="Resistor-488-lPin" pointList="-1132,-892,-1120,-892" />

<item itemtype="Connector" uid="connector-573" startpinid="Tunnel-436-pin" endpinid="Resistor-491-lPin" pointList="-1132,-884,-1120,-884" />

<item itemtype="Connector" uid="connector-574" startpinid="Tunnel-431-pin" endpinid="Resistor-492-lPin" pointList="-1132,-876,-1120,-876" />

<item itemtype="Connector" uid="connector-575" startpinid="Tunnel-435-pin" endpinid="Resistor-489-lPin" pointList="-1132,-868,-1120,-868" />

<item itemtype="Connector" uid="connector-576" startpinid="Tunnel-438-pin" endpinid="Resistor-490-lPin" pointList="-1132,-860,-1120,-860" />

<item itemtype="Connector" uid="connector-577" startpinid="Rail-504-outnod" endpinid="Tunnel-500-pin" pointList="-1356,-1052,-1348,-1052" />

<item itemtype="Connector" uid="connector-578" startpinid="8051-47-RST" endpinid="Ground-511-Gnd" pointList="-1320,-944,-1416,-944,-1416,-936" />

<item itemtype="Connector" uid="connector-579" startpinid="Resistor-484-rPin" endpinid="Node-516-0" pointList="-1088,-916,-1076,-916" />

<item itemtype="Connector" uid="connector-580" startpinid="Resistor-486-rPin" endpinid="Node-519-0" pointList="-1088,-908,-1076,-908" />

<item itemtype="Connector" uid="connector-581" startpinid="Node-516-2" endpinid="Tunnel-513-pin" pointList="-1076,-916,-1052,-916" />

<item itemtype="Connector" uid="connector-582" startpinid="Resistor-487-rPin" endpinid="Node-522-0" pointList="-1088,-900,-1076,-900" />

<item itemtype="Connector" uid="connector-583" startpinid="Node-519-2" endpinid="Node-516-1" pointList="-1076,-908,-1076,-916" />

<item itemtype="Connector" uid="connector-584" startpinid="Resistor-488-rPin" endpinid="Node-525-0" pointList="-1088,-892,-1076,-892" />

<item itemtype="Connector" uid="connector-585" startpinid="Node-522-2" endpinid="Node-519-1" pointList="-1076,-900,-1076,-908" />

<item itemtype="Connector" uid="connector-586" startpinid="Resistor-491-rPin" endpinid="Node-528-0" pointList="-1088,-884,-1076,-884" />

<item itemtype="Connector" uid="connector-587" startpinid="Node-525-2" endpinid="Node-522-1" pointList="-1076,-892,-1076,-900" />

<item itemtype="Connector" uid="connector-588" startpinid="Resistor-492-rPin" endpinid="Node-531-0" pointList="-1088,-876,-1076,-876" />

<item itemtype="Connector" uid="connector-589" startpinid="Node-528-2" endpinid="Node-525-1" pointList="-1076,-884,-1076,-892" />

<item itemtype="Connector" uid="connector-590" startpinid="Resistor-489-rPin" endpinid="Node-534-0" pointList="-1088,-868,-1076,-868" />

<item itemtype="Connector" uid="connector-591" startpinid="Node-531-2" endpinid="Node-528-1" pointList="-1076,-876,-1076,-884" />

<item itemtype="Connector" uid="connector-592" startpinid="Resistor-490-rPin" endpinid="Node-534-1" pointList="-1088,-860,-1076,-860,-1076,-868" />

<item itemtype="Connector" uid="connector-593" startpinid="Node-534-2" endpinid="Node-531-1" pointList="-1076,-868,-1076,-876" />

<item itemtype="Connector" uid="Connector-597" startpinid="Tunnel-596-pin" endpinid="8051-47-PORT30" pointList="-1328,-936,-1320,-936" />

<item itemtype="Connector" uid="Connector-598" startpinid="8051-47-PORT31" endpinid="Tunnel-595-pin" pointList="-1320,-928,-1328,-928" />

<item itemtype="Connector" uid="Connector-612" startpinid="Clock-611-outnod" endpinid="Node-616-0" pointList="-1344,-896,-1336,-896" />

<item itemtype="Connector" uid="Connector-617" startpinid="Node-616-2" endpinid="8051-47-PORT35" pointList="-1336,-896,-1320,-896" />

<item itemtype="Connector" uid="Connector-625" startpinid="Oscope-624-Pin0" endpinid="Node-626-1" pointList="-1160,-796,-1208,-796,-1208,-768,-1336,-768,-1336,-832" />

<item itemtype="Connector" uid="Connector-627" startpinid="Node-626-2" endpinid="Node-616-1" pointList="-1336,-832,-1336,-896" />

<item itemtype="Connector" uid="Connector-615" startpinid="FreqMeter-614-lPin" endpinid="Node-626-0" pointList="-1320,-800,-1320,-832,-1336,-832" />

</circuit>

[/spoiler]

If I try to upload my sim1 file, it simply does not appear after clicking submit. I'll paste it text.

8051.sim1

<circuit version="1.1.0-SR0" rev="1917" stepSize="1000000" stepsPS="1000000" NLsteps="100000" reaStep="1000000" animate="0" >

<item itemtype="Resistor" CircId="Resistor-34" mainComp="false" ShowProp="Resistance" Show_id="false" Show_Val="true" Pos="-1444,-1008" rotation="0" hflip="1" vflip="1" label="Resistor-34" idLabPos="-16,-24" labelrot="0" valLabPos="-16,6" valLabRot="0" Resistance="100 Ω" />

<item itemtype="Led" CircId="Led-35" mainComp="false" Show_id="false" Show_Val="false" Pos="-1396,-1008" rotation="0" hflip="-1" vflip="1" label="Led-35" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Color="Red" Grounded="false" Threshold="1.8 V" MaxCurrent="0.03 A" Resistance="0.6 Ω" />

<item itemtype="Ground" CircId="Ground-42" mainComp="false" Show_id="false" Show_Val="false" Pos="-1488,-964" rotation="0" hflip="1" vflip="1" label="Ground-42" idLabPos="-16,8" labelrot="0" valLabPos="-16,20" valLabRot="0" />

<item itemtype="MCU" CircId="8051-47" mainComp="false" Show_id="true" Show_Val="false" Pos="-1312,-1016" rotation="0" hflip="1" vflip="1" label="8051-47" idLabPos="0,-20" labelrot="0" valLabPos="-16,20" valLabRot="0" Frequency="12 MHz" Program="stc89/build/main.hex" Auto_Load="true" varList="TL0,TH0,TL1,TH1,TCON,TMOD" SerialMon="-1" />

<item itemtype="Buffer" CircId="Buffer-54" mainComp="false" Show_id="false" Show_Val="false" Pos="-1348,-1008" rotation="-180" hflip="1" vflip="1" label="Buffer-54" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Input_High_V="2.5 V" Input_Low_V="2.5 V" Input_Imped="1000 MΩ" Invert_Inputs="false" Out_High_V="5 V" Out_Low_V="0 V" Out_Imped="40 Ω" initHigh="false" Inverted="false" Open_Collector="false" Tristate="false" Tpd_ps="10000 ps" Tr_ps="3000 ps" Tf_ps="4000 ps" />

<item itemtype="Hd44780" CircId="Hd44780-57" mainComp="false" Show_id="true" Show_Val="false" Pos="-1180,-1040" rotation="0" hflip="1" vflip="1" label="Hd44780-57" idLabPos="70,-82" labelrot="0" valLabPos="-16,20" valLabRot="0" Rows="2" Cols="16" />

<item itemtype="Tunnel" CircId="Tunnel-67" mainComp="false" Show_id="false" Show_Val="false" Pos="-972,-992" rotation="0" hflip="-1" vflip="1" label="Tunnel-67" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D3" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-68" mainComp="false" Show_id="false" Show_Val="false" Pos="-972,-968" rotation="0" hflip="-1" vflip="1" label="Tunnel-68" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D0" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-69" mainComp="false" Show_id="false" Show_Val="false" Pos="-972,-1024" rotation="0" hflip="-1" vflip="1" label="Tunnel-69" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D7" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-70" mainComp="false" Show_id="false" Show_Val="false" Pos="-972,-976" rotation="0" hflip="-1" vflip="1" label="Tunnel-70" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D1" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-71" mainComp="false" Show_id="false" Show_Val="false" Pos="-972,-984" rotation="0" hflip="-1" vflip="1" label="Tunnel-71" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D2" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-72" mainComp="false" Show_id="false" Show_Val="false" Pos="-972,-1000" rotation="0" hflip="-1" vflip="1" label="Tunnel-72" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D4" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-73" mainComp="false" Show_id="false" Show_Val="false" Pos="-972,-1016" rotation="0" hflip="-1" vflip="1" label="Tunnel-73" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D6" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-74" mainComp="false" Show_id="false" Show_Val="false" Pos="-972,-1008" rotation="0" hflip="-1" vflip="1" label="Tunnel-74" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D5" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-83" mainComp="false" Show_id="false" Show_Val="false" Pos="-1116,-992" rotation="-90" hflip="1" vflip="1" label="Tunnel-83" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="EN" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-85" mainComp="false" Show_id="false" Show_Val="false" Pos="-1164,-1024" rotation="-90" hflip="1" vflip="1" label="Tunnel-85" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="RS" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-86" mainComp="false" Show_id="false" Show_Val="false" Pos="-1156,-1024" rotation="-90" hflip="1" vflip="1" label="Tunnel-86" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="RW" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-210" mainComp="false" Show_id="false" Show_Val="false" Pos="-1240,-952" rotation="0" hflip="-1" vflip="1" label="Tunnel-210" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D6" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-211" mainComp="false" Show_id="false" Show_Val="false" Pos="-1240,-944" rotation="0" hflip="-1" vflip="1" label="Tunnel-211" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D7" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-212" mainComp="false" Show_id="false" Show_Val="false" Pos="-1240,-976" rotation="0" hflip="-1" vflip="1" label="Tunnel-212" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D3" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-213" mainComp="false" Show_id="false" Show_Val="false" Pos="-1240,-984" rotation="0" hflip="-1" vflip="1" label="Tunnel-213" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D2" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-214" mainComp="false" Show_id="false" Show_Val="false" Pos="-1240,-1000" rotation="0" hflip="-1" vflip="1" label="Tunnel-214" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D0" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-215" mainComp="false" Show_id="false" Show_Val="false" Pos="-1240,-992" rotation="0" hflip="-1" vflip="1" label="Tunnel-215" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D1" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-216" mainComp="false" Show_id="false" Show_Val="false" Pos="-1240,-968" rotation="0" hflip="-1" vflip="1" label="Tunnel-216" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D4" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-217" mainComp="false" Show_id="false" Show_Val="false" Pos="-1240,-960" rotation="0" hflip="-1" vflip="1" label="Tunnel-217" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D5" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-245" mainComp="false" Show_id="false" Show_Val="false" Pos="-1244,-872" rotation="0" hflip="-1" vflip="1" label="Tunnel-245" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="EN" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-246" mainComp="false" Show_id="false" Show_Val="false" Pos="-1244,-880" rotation="0" hflip="-1" vflip="1" label="Tunnel-246" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="RW" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-247" mainComp="false" Show_id="false" Show_Val="false" Pos="-1244,-888" rotation="0" hflip="-1" vflip="1" label="Tunnel-247" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="RS" IsBus="false" />

<item itemtype="Buffer" CircId="Buffer-351" mainComp="false" Show_id="false" Show_Val="false" Pos="-1004,-1024" rotation="-180" hflip="1" vflip="1" label="Buffer-351" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Input_High_V="2.5 V" Input_Low_V="2.5 V" Input_Imped="1000 MΩ" Invert_Inputs="false" Out_High_V="5 V" Out_Low_V="0 V" Out_Imped="40 Ω" initHigh="false" Inverted="false" Open_Collector="false" Tristate="false" Tpd_ps="10000 ps" Tr_ps="3000 ps" Tf_ps="4000 ps" />

<item itemtype="Buffer" CircId="Buffer-352" mainComp="false" Show_id="false" Show_Val="false" Pos="-1004,-1016" rotation="-180" hflip="1" vflip="1" label="Buffer-352" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Input_High_V="2.5 V" Input_Low_V="2.5 V" Input_Imped="1000 MΩ" Invert_Inputs="false" Out_High_V="5 V" Out_Low_V="0 V" Out_Imped="40 Ω" initHigh="false" Inverted="false" Open_Collector="false" Tristate="false" Tpd_ps="10000 ps" Tr_ps="3000 ps" Tf_ps="4000 ps" />

<item itemtype="Buffer" CircId="Buffer-353" mainComp="false" Show_id="false" Show_Val="false" Pos="-1004,-1008" rotation="-180" hflip="1" vflip="1" label="Buffer-353" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Input_High_V="2.5 V" Input_Low_V="2.5 V" Input_Imped="1000 MΩ" Invert_Inputs="false" Out_High_V="5 V" Out_Low_V="0 V" Out_Imped="40 Ω" initHigh="false" Inverted="false" Open_Collector="false" Tristate="false" Tpd_ps="10000 ps" Tr_ps="3000 ps" Tf_ps="4000 ps" />

<item itemtype="Buffer" CircId="Buffer-354" mainComp="false" Show_id="false" Show_Val="false" Pos="-1004,-1000" rotation="-180" hflip="1" vflip="1" label="Buffer-354" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Input_High_V="2.5 V" Input_Low_V="2.5 V" Input_Imped="1000 MΩ" Invert_Inputs="false" Out_High_V="5 V" Out_Low_V="0 V" Out_Imped="40 Ω" initHigh="false" Inverted="false" Open_Collector="false" Tristate="false" Tpd_ps="10000 ps" Tr_ps="3000 ps" Tf_ps="4000 ps" />

<item itemtype="Buffer" CircId="Buffer-355" mainComp="false" Show_id="false" Show_Val="false" Pos="-1004,-992" rotation="-180" hflip="1" vflip="1" label="Buffer-355" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Input_High_V="2.5 V" Input_Low_V="2.5 V" Input_Imped="1000 MΩ" Invert_Inputs="false" Out_High_V="5 V" Out_Low_V="0 V" Out_Imped="40 Ω" initHigh="false" Inverted="false" Open_Collector="false" Tristate="false" Tpd_ps="10000 ps" Tr_ps="3000 ps" Tf_ps="4000 ps" />

<item itemtype="Buffer" CircId="Buffer-356" mainComp="false" Show_id="false" Show_Val="false" Pos="-1004,-984" rotation="-180" hflip="1" vflip="1" label="Buffer-356" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Input_High_V="2.5 V" Input_Low_V="2.5 V" Input_Imped="1000 MΩ" Invert_Inputs="false" Out_High_V="5 V" Out_Low_V="0 V" Out_Imped="40 Ω" initHigh="false" Inverted="false" Open_Collector="false" Tristate="false" Tpd_ps="10000 ps" Tr_ps="3000 ps" Tf_ps="4000 ps" />

<item itemtype="Buffer" CircId="Buffer-357" mainComp="false" Show_id="false" Show_Val="false" Pos="-1004,-976" rotation="-180" hflip="1" vflip="1" label="Buffer-357" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Input_High_V="2.5 V" Input_Low_V="2.5 V" Input_Imped="1000 MΩ" Invert_Inputs="false" Out_High_V="5 V" Out_Low_V="0 V" Out_Imped="40 Ω" initHigh="false" Inverted="false" Open_Collector="false" Tristate="false" Tpd_ps="10000 ps" Tr_ps="3000 ps" Tf_ps="4000 ps" />

<item itemtype="Buffer" CircId="Buffer-358" mainComp="false" Show_id="false" Show_Val="false" Pos="-1004,-968" rotation="-180" hflip="1" vflip="1" label="Buffer-358" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Input_High_V="2.5 V" Input_Low_V="2.5 V" Input_Imped="1000 MΩ" Invert_Inputs="false" Out_High_V="5 V" Out_Low_V="0 V" Out_Imped="40 Ω" initHigh="false" Inverted="false" Open_Collector="false" Tristate="false" Tpd_ps="10000 ps" Tr_ps="3000 ps" Tf_ps="4000 ps" />

<item itemtype="Tunnel" CircId="Tunnel-431" mainComp="false" Show_id="false" Show_Val="false" Pos="-1132,-876" rotation="0" hflip="1" vflip="1" label="Tunnel-431" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D5" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-432" mainComp="false" Show_id="false" Show_Val="false" Pos="-1132,-892" rotation="0" hflip="1" vflip="1" label="Tunnel-432" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D3" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-433" mainComp="false" Show_id="false" Show_Val="false" Pos="-1132,-900" rotation="0" hflip="1" vflip="1" label="Tunnel-433" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D2" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-434" mainComp="false" Show_id="false" Show_Val="false" Pos="-1132,-908" rotation="0" hflip="1" vflip="1" label="Tunnel-434" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D1" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-435" mainComp="false" Show_id="false" Show_Val="false" Pos="-1132,-868" rotation="0" hflip="1" vflip="1" label="Tunnel-435" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D6" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-436" mainComp="false" Show_id="false" Show_Val="false" Pos="-1132,-884" rotation="0" hflip="1" vflip="1" label="Tunnel-436" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D4" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-437" mainComp="false" Show_id="false" Show_Val="false" Pos="-1132,-916" rotation="0" hflip="1" vflip="1" label="Tunnel-437" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D0" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-438" mainComp="false" Show_id="false" Show_Val="false" Pos="-1132,-860" rotation="0" hflip="1" vflip="1" label="Tunnel-438" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="D7" IsBus="false" />

<item itemtype="Resistor" CircId="Resistor-484" mainComp="false" Show_id="false" Show_Val="false" Pos="-1104,-916" rotation="0" hflip="1" vflip="1" label="Resistor-484" idLabPos="-16,-24" labelrot="0" valLabPos="-16,6" valLabRot="0" Resistance="10 kΩ" />

<item itemtype="Resistor" CircId="Resistor-486" mainComp="false" Show_id="false" Show_Val="false" Pos="-1104,-908" rotation="0" hflip="1" vflip="1" label="Resistor-486" idLabPos="-16,-24" labelrot="0" valLabPos="-16,6" valLabRot="0" Resistance="10 kΩ" />

<item itemtype="Resistor" CircId="Resistor-487" mainComp="false" Show_id="false" Show_Val="false" Pos="-1104,-900" rotation="0" hflip="1" vflip="1" label="Resistor-487" idLabPos="-16,-24" labelrot="0" valLabPos="-16,6" valLabRot="0" Resistance="10 kΩ" />

<item itemtype="Resistor" CircId="Resistor-488" mainComp="false" Show_id="false" Show_Val="false" Pos="-1104,-892" rotation="0" hflip="1" vflip="1" label="Resistor-488" idLabPos="-16,-24" labelrot="0" valLabPos="-16,6" valLabRot="0" Resistance="10 kΩ" />

<item itemtype="Resistor" CircId="Resistor-489" mainComp="false" Show_id="false" Show_Val="false" Pos="-1104,-868" rotation="0" hflip="1" vflip="1" label="Resistor-489" idLabPos="-16,-24" labelrot="0" valLabPos="-16,6" valLabRot="0" Resistance="10 kΩ" />

<item itemtype="Resistor" CircId="Resistor-490" mainComp="false" Show_id="false" Show_Val="false" Pos="-1104,-860" rotation="0" hflip="1" vflip="1" label="Resistor-490" idLabPos="-16,-24" labelrot="0" valLabPos="-16,6" valLabRot="0" Resistance="10 kΩ" />

<item itemtype="Resistor" CircId="Resistor-491" mainComp="false" Show_id="false" Show_Val="false" Pos="-1104,-884" rotation="0" hflip="1" vflip="1" label="Resistor-491" idLabPos="-16,-24" labelrot="0" valLabPos="-16,6" valLabRot="0" Resistance="10 kΩ" />

<item itemtype="Resistor" CircId="Resistor-492" mainComp="false" Show_id="false" Show_Val="false" Pos="-1104,-876" rotation="0" hflip="1" vflip="1" label="Resistor-492" idLabPos="-16,-24" labelrot="0" valLabPos="-16,6" valLabRot="0" Resistance="10 kΩ" />

<item itemtype="Tunnel" CircId="Tunnel-500" mainComp="false" Show_id="false" Show_Val="false" Pos="-1348,-1052" rotation="0" hflip="-1" vflip="1" label="Tunnel-500" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="Vcc" IsBus="false" />

<item itemtype="Rail" CircId="Rail-504" mainComp="false" ShowProp="Voltage" Show_id="false" Show_Val="true" Pos="-1372,-1052" rotation="0" hflip="1" vflip="1" label="Rail-504" idLabPos="-16,-24" labelrot="0" valLabPos="-16,8" valLabRot="0" Voltage="5 V" />

<item itemtype="Ground" CircId="Ground-511" mainComp="false" Show_id="false" Show_Val="false" Pos="-1416,-920" rotation="0" hflip="1" vflip="1" label="Ground-511" idLabPos="-16,8" labelrot="0" valLabPos="-16,20" valLabRot="0" />

<item itemtype="Tunnel" CircId="Tunnel-513" mainComp="false" Show_id="false" Show_Val="false" Pos="-1052,-916" rotation="0" hflip="-1" vflip="1" label="Tunnel-513" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="Vcc" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-595" mainComp="false" Show_id="false" Show_Val="false" Pos="-1328,-928" rotation="0" hflip="1" vflip="1" label="Tunnel-595" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="TX" IsBus="false" />

<item itemtype="Tunnel" CircId="Tunnel-596" mainComp="false" Show_id="false" Show_Val="false" Pos="-1328,-936" rotation="0" hflip="1" vflip="1" label="Tunnel-596" idLabPos="-16,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Name="RX" IsBus="false" />

<item itemtype="Clock" CircId="Clock-611" mainComp="false" Show_id="false" Show_Val="false" Pos="-1360,-896" rotation="0" hflip="1" vflip="1" label="Clock-611" idLabPos="-64,-24" labelrot="0" valLabPos="-16,8" valLabRot="0" Out="true" Running="true" Voltage="5 V" Freq="22345 Hz" Always_On="true" />

<item itemtype="Oscope" CircId="Oscope-613" mainComp="false" Show_id="false" Show_Val="false" Pos="-1804,-824" rotation="0" hflip="1" vflip="1" label="Oscope-613" idLabPos="-90,-100" labelrot="0" valLabPos="-16,20" valLabRot="0" Basic_X="135 _px" Basic_Y="135 _px" BufferSize="600000 Samples" connectGnd="true" InputImped="10 MΩ" TimDiv="1000000000" TimPos="0,0,0,0," VolDiv="1,1,1,1," Tunnels=",,,," Trigger="4" Filter="0.1 V" Trigger="4" AutoSC="4" Tracks="1" HideCh="false,false,false,false," VolPos="0,0,0,0," />

<item itemtype="FreqMeter" CircId="FreqMeter-614" mainComp="false" Show_id="false" Show_Val="false" Pos="-1280,-800" rotation="0" hflip="1" vflip="1" label="FreqMeter-614" idLabPos="-32,-24" labelrot="0" valLabPos="-16,20" valLabRot="0" Filter="0.1 V" />

<item itemtype="Oscope" CircId="Oscope-624" mainComp="false" Show_id="false" Show_Val="false" Pos="-1072,-748" rotation="0" hflip="1" vflip="1" label="Oscope-624" idLabPos="-90,-100" labelrot="0" valLabPos="-16,20" valLabRot="0" Basic_X="135 _px" Basic_Y="135 _px" BufferSize="600000 Samples" connectGnd="true" InputImped="10 MΩ" TimDiv="20000000" TimPos="0,0,0,0," VolDiv="2,2,2,2," Tunnels=",,,," Trigger="0" Filter="1 V" Trigger="0" AutoSC="4" Tracks="1" HideCh="false,false,false,false," VolPos="0,0,0,0," />

<item itemtype="Node" CircId="Node-516" mainComp="false" Pos="-1076,-916" />

<item itemtype="Node" CircId="Node-519" mainComp="false" Pos="-1076,-908" />

<item itemtype="Node" CircId="Node-522" mainComp="false" Pos="-1076,-900" />

<item itemtype="Node" CircId="Node-525" mainComp="false" Pos="-1076,-892" />

<item itemtype="Node" CircId="Node-528" mainComp="false" Pos="-1076,-884" />

<item itemtype="Node" CircId="Node-531" mainComp="false" Pos="-1076,-876" />

<item itemtype="Node" CircId="Node-534" mainComp="false" Pos="-1076,-868" />

<item itemtype="Node" CircId="Node-616" mainComp="false" Pos="-1336,-896" />

<item itemtype="Node" CircId="Node-626" mainComp="false" Pos="-1336,-832" />

<item itemtype="Connector" uid="connector-535" startpinid="Resistor-34-rPin" endpinid="Led-35-rPin" pointList="-1428,-1008,-1412,-1008" />

<item itemtype="Connector" uid="connector-536" startpinid="Ground-42-Gnd" endpinid="Resistor-34-lPin" pointList="-1488,-980,-1488,-1008,-1460,-1008" />

<item itemtype="Connector" uid="connector-537" startpinid="8051-47-PORT10" endpinid="Buffer-54-in0" pointList="-1320,-1008,-1332,-1008" />

<item itemtype="Connector" uid="connector-538" startpinid="Buffer-54-out" endpinid="Led-35-lPin" pointList="-1364,-1008,-1380,-1008" />

<item itemtype="Connector" uid="connector-539" startpinid="Hd44780-57-PinEn" endpinid="Tunnel-83-pin" pointList="-1148,-1032,-1148,-992,-1116,-992" />

<item itemtype="Connector" uid="connector-540" startpinid="Tunnel-86-pin" endpinid="Hd44780-57-PinRW" pointList="-1156,-1024,-1156,-1032" />

<item itemtype="Connector" uid="connector-541" startpinid="Tunnel-85-pin" endpinid="Hd44780-57-PinRS" pointList="-1164,-1024,-1164,-1032" />

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</circuit>

#3 · October 13, 2024, 3:32 am

Hi.

You need to set EA Pin High.

#4 · October 13, 2024, 4:04 am

Thankyou. That didn't seem to be an issue before. The STC89 datasheet says it has an internal pullup for EA pin.

Now I am having trouble, I can't get any print or delay to run. Often when I am stepping though debug, in my delay_ms function, SimulIDE will just crash. Is there somewhere it will show a crash log?

#5 · October 13, 2024, 4:16 am

I modified the code to

Spoiler

int main(void) {
	delay_ms(1);
	EA = 1; // enable interrupts
	EX0 = 0; EX1 = 0; // Disable external interrupts
	
	IP = 0x02; // timer0 interrupt prio high
	IPH = 0x02; // timer0 interrupt prio highest
	//lcd_init();
	while (1) {
		//lcd_clear();
		//lcd_string("Counting..");
		delay_ms(10);
		P1_0 = 0;
		delay_ms(10);
		P1_0 = 1;
		/*count_t1_freq();
		while (counting) {}
		lcd_clear();
		lcd_string("c: ");
		delay_ms(100);
		lcd_long(count_result);
		//printf_fast("%d Hz", 5);
		delay_ms(1000);*/
	}
}

void delay_ms(unsigned int count) {
    unsigned int i, j;
    for (i = 0; i < count; i++) {
        for (j = 0; j < 2; j++) {
			Nop();Nop();Nop();Nop();
        }
		Nop();Nop();Nop();Nop();Nop();Nop();Nop();
    }
}

If I put a breakpoint at EA = 1; then I can never step until I reach that breakpoint...

In fact it seems as if it calls the same function repeatedly? It steps into the same delay_ms function repeatedly, it never goes onto the next line of code. Like there's a phantom while loop.

#6 · October 13, 2024, 5:43 am

I didn't realize befor but you are not compiling for 8051.
There is no IPH register in 8051.

If I ignore IPH and that Nop() function and compile for 8051, I get a 22.35 KHz at P3.5

#7 · October 13, 2024, 10:06 am

Quote from arcachofo on October 13, 2024, 5:43 am

I didn't realize befor but you are not compiling for 8051.
There is no IPH register in 8051.

If I ignore IPH and that Nop() function and compile for 8051, I get a 22.35 KHz at P3.5

True, my IRL CPU is STC89. I commented that out. Default SDCC target is a MCS51 processsor, right? But 8051 should still have NOP as valid assembly, right?

https://www.refreshnotes.com/2016/03/8051-nop-instruction.html

#8 · October 13, 2024, 10:14 am

In SimulIDE 1.0, I can have this code

Spoiler

int main(void) {
	EA = 1; // enable interrupts
	EX0 = 0; EX1 = 0; // Disable external interrupts
	
	IP = 0x02; // timer0 interrupt prio high
	//IPH = 0x02; // timer0 interrupt prio highest, STC89 only
	//lcd_init();
	while (1) {
		//lcd_clear();
		//lcd_string("Counting..");
		delay_ms(500);
		P1_0 = 0;
		delay_ms(500);
		P1_0 = 1;
		/*count_t1_freq();
		while (counting) {}
		lcd_clear();
		lcd_string("c: ");
		delay_ms(100);
		lcd_long(count_result);
		//printf_fast("%d Hz", 5);
		delay_ms(1000);*/
	}
}

void delay_ms(unsigned int count) {
    unsigned int i, j;
    for (i = 0; i < count; i++) {
        for (j = 0; j < 35; j++) {
			__asm nop __endasm;
			__asm nop __endasm;
			__asm nop __endasm;
			__asm nop __endasm;
        }
    }
}

And it works, the LED on P1_0 blinks. In SimulIDE 1.1.0, it does not blink.

#9 · October 13, 2024, 10:23 am

It is working for me:

#include <8051.h>

void delay_ms(unsigned int count) {
    unsigned int i, j;
    for (i = 0; i < count; i++) {
        for (j = 0; j < 35; j++) {
            __asm nop __endasm;
            __asm nop __endasm;
            __asm nop __endasm;
            __asm nop __endasm;
        }
    }
}

int main(void) {
    EA = 1; // enable interrupts
    EX0 = 0; EX1 = 0; // Disable external interrupts
    
    IP = 0x02; // timer0 interrupt prio high
    //IPH = 0x02; // timer0 interrupt prio highest, STC89 only
    //lcd_init();
    while (1) {
        //lcd_clear();
        //lcd_string("Counting..");
        delay_ms(500);
        P1_0 = 0;
        delay_ms(500);
        P1_0 = 1;
        /*count_t1_freq();
        while (counting) {}
        lcd_clear();
        lcd_string("c: ");
        delay_ms(100);
        lcd_long(count_result);
        //printf_fast("%d Hz", 5);
        delay_ms(1000);*/
    }
}

#10 · October 13, 2024, 10:27 am

Thimking about it, maybe you should try the last build:
https://simulide.com/p/testers/