Quote from doo on April 5, 2024, 1:23 pm

Mode 0 of 8051serial communication does not work properly, there is no signal on the rxd(3.0) and txd(3.1) pins.

it works fine in proteus.

sdcc code:

#include<8051.h>

main()
{
	SCON=0X00;	
	IE=0X90;	
	TI=1;		
	while(1)
	SBUF=0X87;	
}
void interrupt_uart() __interrupt (4)
{
	TI=0;	
}

 

 

#include<8051.h>

main()
{
	SCON=0X00;	
	IE=0X90;	
	TI=1;		
	while(1)
	SBUF=0X87;	
}
void interrupt_uart() __interrupt (4)
{
	TI=0;	
}