N76E003AT20 MCU serial port 0 debugging

If a key 1 is pressed, the serial port 0 of N76E003 will send 1 to the serial port debugging assistant, but there is always a problem. Which great god can help me? The code is as follows:

#include "n76e003.h"

#include "stdio.h"

#define uint32 unsigned int

//typedef unsigned int uint32;

void delay_us(int n)

{

int m;

for(m=0;m

}

void delay_ms(int j)

{

int k;

for(k=0;k

delay_us(1000);

}

void P0_P1_Mode(void)

{

P0M1=0x3A; P0M2=0x3B; //Set P0

P1M1=0xA0; P1M2=0xBF; //Set P1

}

sbit s1 = P0^0;

sbit s2 = P1^0;

sbit s3 = P1^1;

sbit s4 = P1^2;

sbit s5 = P1^3;

sbit s6 = P1^4;

void UART0_Init(uint32 Baud) //Set up serial port 0

{

P0_P1_Mode();

ES=1; //Enable all interrupts

ES=1; //Serial port 0 interrupt enable

ET1=0; //Disable timer 1 interrupt

SCON = 0x52; //Serial port 0 selects mode 1 SM0=0 SM1=1 REN=1 TI=1

T3CON|=0x00; //Select timer 1 BRCK=0

PCON |= 0x80; // Double the baud rate of timer 1 SMOD=1

CKCON|=0x10; //The clock source of timer 1 is the system clock T1M=1

TMOD |=0x20; //Timer 1 selects mode 2 8-bit counter, the value is automatically reloaded from TH1 to TL1 M1=1 M0=0 2^8=256

#ifdef FOSC_160000

TH1 = 256 - (1000000/Baud+1); /*16 MHz */

#endif

TCON |=0x40; //Timer 1 starts TR1=1

}

void Send_Data_UART0(int a)

{

TI=0;

SBUF=a; //Serial port 0 data buffer register

while(TI==0);

}

int main()

{

s1=1;

s2=1;

s3=1;

s4=1;

s5=1;

s6=1;

UART0_Init(9600);

while(1)

{

if(s1=0)

{ Send_Data_UART0(1); }

delay_ms(10);

if(s2=0)

{ Send_Data_UART0(2); }

delay_ms(10);

if(s3=0)

{ Send_Data_UART0(3); }

delay_ms(10);

if(s4=0)

{ Send_Data_UART0(4); }

delay_ms(10);

if(s5=0)

{ Send_Data_UART0(5); }

delay_ms(10);

if(s6=0)

{ Send_Data_UART0(6); }

delay_ms(10);

}

}