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(" ");
}
}
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
重映射代码，myPrintf.c
#include "stm8s.h"
#include
/*
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);
}
main.c 主要输出部分：
#include
void main(void)
{
myUart1Init (115200);
printf ("STM8S Start.\r\n");
while(1)
{
}
}
