STM8串口打印调试信息

原文地址::http://blog.csdn.net/u011574686/article/details/53260192

• stm8S 串口输出调试信息
  • 自己写的API函数
  • printf 函数重映射

stm8S 串口输出调试信息

自己写的API函数

static void uart1SendMsg(char msg[], uint16_t length){       uint16_t i;    for (i =0 ;i < length;i++)    {        UART1_SendData8(msg[i]);        while(UART1_GetFlagStatus(UART1_FLAG_TC) == RESET);    }}"`void myPrintfAscii(char *msg){    while((*msg) != '\0')    {        uart1SendMsg(msg, 1);        msg++;    }}void myPrintfInt8(uint8_t msg[], int length){    char int2Ascii[64];    uint16_t i, m, intLength;    int n;    long temp;    for (i = 0;i < length;i++)    {        m = 0;        temp = msg[i];        while(m <= 64)        {            int2Ascii[m++] = temp % 10;            temp /= 10;            if (0 == temp)            {                break;            }        }        intLength = m;        for (n = intLength - 1;n >= 0;n--)        {            int2Ascii[n] += '0';            uart1SendMsg(int2Ascii + n, 1);        }        myPrintfAscii(" ");    }}void myPrintfInt16(uint16_t msg[], int length){    char int2Ascii[64];    uint16_t i, m, intLength;    int n;    long temp;    for (i = 0;i < length;i++)    {        m = 0;        temp = msg[i];        while(m <= 64)        {            int2Ascii[m++] = temp % 10;            temp /= 10;            if (0 == temp)            {                break;            }        }        intLength = m;        for (n = intLength - 1;n >= 0;n--)        {            int2Ascii[n] += '0';            uart1SendMsg(int2Ascii + n, 1);        }        myPrintfAscii("\r\n");    }}void myPrintfInt32(uint32_t msg[], int length){    char int2Ascii[64];    uint16_t i, m, intLength;    int n;    long temp;    for (i = 0;i < length;i++)    {        m = 0;        temp = msg[i];        while(m <= 64)        {            int2Ascii[m++] = temp % 10;            temp /= 10;            if (0 == temp)            {                break;            }        }        intLength = m;        for (n = intLength - 1;n >= 0;n--)        {            int2Ascii[n] += '0';            uart1SendMsg(int2Ascii + n, 1);        }        myPrintfAscii(" ");    }}
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上述方法相对笨一点，而且无法打印负数，浮点数。下面直接使用printf标准输入输出函数，将调试信息串口打印出来。

printf 函数重映射

使用printf函数将调试信息用串口打印出来，首先在有printf函数的C文件下包含 #include <stdio.h>，其次将printf函数重定向串口输出1， 参考网址1。贴代码：

重映射代码，myPrintf.c

#include "stm8s.h"#include <stdio.h>/* 由于不同的编译器 putcha 和 getchar 形参和返回值略有不同。 因此此处采用宏定义的方式区别。 _RAISONANCE_ 和 _COSMIC_ 这2个宏是由编译器自动添加的预编译宏*/#ifdef _RAISONANCE_ #define PUTCHAR_PROTOTYPE int putchar (char c) #define GETCHAR_PROTOTYPE int getchar (void)#elif defined (_COSMIC_) #define PUTCHAR_PROTOTYPE char putchar (char c) #define GETCHAR_PROTOTYPE char getchar (void)#else /* _IAR_ */ #define PUTCHAR_PROTOTYPE int putchar (int c) #define GETCHAR_PROTOTYPE int getchar (void)#endif /* _RAISONANCE_ */PUTCHAR_PROTOTYPE{ /* 发送一个字符 c 到UART1 */ UART1_SendData8(c); /* 等待发送完毕 */ while (UART1_GetFlagStatus(UART1_FLAG_TXE) == RESET); return (c);}GETCHAR_PROTOTYPE{ #ifdef _COSMIC_  char c = 0; #else  int c = 0; #endif /* 等待新数据到达  */ while (UART1_GetFlagStatus(UART1_FLAG_RXNE) == RESET); /* 读取数据寄存器 */ c = UART1_ReceiveData8(); return (c);}
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main.c 主要输出部分：

#include <stdio.h>void main(void){           myUart1Init (115200);    printf ("STM8S Start.\r\n");    while(1)    {       }}