STC15W4K48S4串口3和串口4问题（求助）
用的是STC-ISP的范例程序，无串口输出。麻烦高手指教一下，谢谢！
#include "reg51.h"
#include "intrins.h"
typedef unsigned char BYTE;
typedef unsigned int WORD;
#define FOSC 11059200L //系统频率
#define BAUD 115200 //串口波特率
#define NONE_PARITY 0 //无校验
#define ODD_PARITY 1 //奇校验
#define EVEN_PARITY 2 //偶校验
#define MARK_PARITY 3 //标记校验
#define SPACE_PARITY 4 //空白校验
#define PARITYBIT NONE_PARITY //定义校验位
sfr P0M1 = 0x93;
sfr P0M0 = 0x94;
sfr P1M1 = 0x91;
sfr P1M0 = 0x92;
sfr P2M1 = 0x95;
sfr P2M0 = 0x96;
sfr P3M1 = 0xb1;
sfr P3M0 = 0xb2;
sfr P4M1 = 0xb3;
sfr P4M0 = 0xb4;
sfr P5M1 = 0xC9;
sfr P5M0 = 0xCA;
sfr P6M1 = 0xCB;
sfr P6M0 = 0xCC;
sfr P7M1 = 0xE1;
sfr P7M0 = 0xE2;
sfr S3CON = 0xac; //UART3 控制寄存器
sfr S3BUF = 0xad; //UART3 数据寄存器
sfr IE2 = 0xAF; //中断使能寄存器2
sfr T4T3M = 0xD1; //定时器3和定时器4控制寄存器
sfr T4H = 0xD2; //定时器4高8位
sfr T4L = 0xD3; //定时器4低8位
sfr T3H = 0xD4; //定时器3高8位
sfr T3L = 0xD5; //定时器3低8位
#define S3RI0x01 //S3CON.0
#define S3TI0x02 //S3CON.1
#define S3RB8 0x04 //S3CON.2
#define S3TB8 0x08 //S3CON.3
sfr P_SW2 = 0xBA; //外设功能切换寄存器2
#define S3_S0 0x02 //P_SW2.1
bit busy;
void SendData(BYTE dat);
void SendString(char *s);
void main()
{
P0M0 = 0x00;
P0M1 = 0x00;
P1M0 = 0x00;
P1M1 = 0x00;
P2M0 = 0x00;
P2M1 = 0x00;
P3M0 = 0x00;
P3M1 = 0x00;
P4M0 = 0x00;
P4M1 = 0x00;
P5M0 = 0x00;
P5M1 = 0x00;
P6M0 = 0x00;
P6M1 = 0x00;
P7M0 = 0x00;
P7M1 = 0x00;
P_SW2 &= ~S3_S0; //S3_S0=0 (P0.0/RxD3, P0.1/TxD3)
//P_SW2 |= S3_S0; //S3_S0=1 (P5.0/RxD3_2, P5.1/TxD3_2)
#if (PARITYBIT == NONE_PARITY)
S3CON = 0x50; //8位可变波特率
#elif (PARITYBIT == ODD_PARITY) || (PARITYBIT == EVEN_PARITY) || (PARITYBIT == MARK_PARITY)
S3CON = 0xda; //9位可变波特率,校验位初始为1
#elif (PARITYBIT == SPACE_PARITY)
S3CON = 0xd2; //9位可变波特率,校验位初始为0
#endif
T3L = (65536 - (FOSC/4/BAUD)); //设置波特率重装值
T3H = (65536 - (FOSC/4/BAUD))>>8;
T4T3M |= 0x02; //定时器3为1T模式
T4T3M |= 0x08; //定时器3开始计时
IE2 = 0x08; //使能串口3中断
EA = 1;
SendString("STC15F4K60S4\r\nUart3 Test !\r\n");
while(1);
}
/*----------------------------
UART3 中断服务程序
-----------------------------*/
void Uart3() interrupt 17
{
if (S3CON & S3RI)
{
S3CON &= ~S3RI; //清除S3RI位
P0 = S3BUF; //P0显示串口数据
P2 = (S3CON & S3RB8); //P2.2显示校验位
}
if (S3CON & S3TI)
{
S3CON &= ~S3TI; //清除S3TI位
busy = 0; //清忙标志
}
}
/*----------------------------
发送串口数据
----------------------------*/
void SendData(BYTE dat)
{
while (busy); //等待前面的数据发送完成
ACC = dat; //获取校验位P (PSW.0)
if (P) //根据P来设置校验位
{
#if (PARITYBIT == ODD_PARITY)
S3CON &= ~S3TB8; //设置校验位为0
#elif (PARITYBIT == EVEN_PARITY)
S3CON |= S3TB8; //设置校验位为1
#endif
}
else
{
#if (PARITYBIT == ODD_PARITY)
S3CON |= S3TB8; //设置校验位为1
#elif (PARITYBIT == EVEN_PARITY)
S3CON &= ~S3TB8; //设置校验位为0
#endif
}
busy = 1;
S3BUF = ACC; //写数据到UART2数据寄存器
}
/*----------------------------
发送字符串
----------------------------*/
void SendString(char *s)
{
while (*s) //检测字符串结束标志
{
SendData(*s++); //发送当前字符
}
}
本帖最后由 STC32G12K128 于 2023-8-10 09:44 编辑
范例应该没问题的，您再用我的范例试试看看，再排查下硬件是否有问题？
1，确保你的 外部晶振，或跑的内部时钟是 11.0592MHz
2,下面的软件，参考下
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