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標題: STM8S-Discovery串口測試程序 [打印本頁]

作者: xiaos 時間: 2015-4-2 23:22
標題: STM8S-Discovery串口測試程序

#include <iostm8s105c6.h>
#include <stdio.h>

#define BAUD_RATE    9600       //波特率
#define F_CPU       16000000    //CPU頻率

//串口配置
//數據位:8
//停止位:1
//校驗位:None
void UART_Init(void)
{
UART2_CR2_TEN = 1;
UART2_CR2_REN = 1;
UART2_CR2_RIEN = 1;
UART2_BRR2 = ((unsigned char)((F_CPU / BAUD_RATE) & 0x0f)) + (((unsigned char)((F_CPU / BAUD_RATE) >> 8)) & 0xf0);
UART2_BRR1 = ((unsigned char)((F_CPU / BAUD_RATE) >> 4));
}

void UART_TxByte(unsigned char _data)
{
while (UART2_SR_TXE == 0);
UART2_DR = _data;
}

int putchar(int c)
{
UART_TxByte(c);
return c;
}

int main(void)
{
CLK_SWCR_SWEN = 1;
CLK_SWR = 0xB4; //HSE selected as master clock source

UART_Init();
printf("********** STM8S-Discovery UART Test *********\r\n");
printf("Build: %s  %s\r\n", __DATE__, __TIME__);

asm("rim");

while (1)
{
}
}

#pragma vector = UART2_R_RXNE_vector
__interrupt void UART2_IRQHandler(void)
{
if (UART2_SR_RXNE == 1)
{
      UART_TxByte(UART2_DR);
}
}

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