STM32串口发送数据模块
主函数：
#include "stm32f10x.h"
#include "usart1.h"
int main(void)
{
//系统时钟初始化函数定义
SystemInit();
//串口初始化函数定义
USART1_Config();
printf("\r\n this is a printf demo \r\n");
printf("\r\n 欢迎使用CHD1807_STM32实验板:) \r\n");
printf(" \r\n %5d \r\n",1200);
USART1_printf(USART1, "\r\n This is a USART1_printf demo \r\n");
USART_SendData(USART1,0x31); //发送数据，参数1为串口外设，参数2为数据的ASCLL 码
while(1);
}
串口定义函数：
#include "usart1.h"
#include
/*
* 函数名：USART1_Config
* 描述：USART1 GPIO 配置,工作模式配置。115200 8-N-1
* 输入：无
* 输出: 无
* 调用：外部调用
*/
void USART1_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
/* config USART1 clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
/* USART1 GPIO config */
/* Configure USART1 Tx (PA.09) as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure USART1 Rx (PA.10) as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* USART1 mode config */
USART_https://www.wendangku.net/doc/5614111164.html,ART_BaudRate = 115200;
USART_https://www.wendangku.net/doc/5614111164.html,ART_WordLength = USART_WordLength_8b; //数据长度为8为USART_https://www.wendangku.net/doc/5614111164.html,ART_StopBits = USART_StopBits_1; //帧结尾定义一个停止位
USART_https://www.wendangku.net/doc/5614111164.html,ART_Parity = USART_Parity_No ;
USART_https://www.wendangku.net/doc/5614111164.html,ART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_https://www.wendangku.net/doc/5614111164.html,ART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
}
/*
* 函数名：fputc
* 描述：重定向c库函数printf到USART1
* 输入：无
* 输出：无
* 调用：由printf调用
*/
int fputc(int ch, FILE *f)
{
/* 将Printf内容发往串口*/
USART_SendData(USART1, (unsigned char) ch);
// while (!(USART1->SR & USART_FLAG_TXE));
while( USART_GetFlagStatus(USART1,USART_FLAG_TC)!= SET);
return (ch);
}
/*
* 函数名：itoa
* 描述：将整形数据转换成字符串
* 输入：-radix =10 表示10进制，其他结果为0
* -value 要转换的整形数
* -buf 转换后的字符串
* -radix = 10
* 输出：无
* 返回：无
* 调用：被USART1_printf()调用
*/
static char *itoa(int value, char *string, int radix)
{
int i, d;
int flag = 0;
char *ptr = string;
/* This implementation only works for decimal numbers. */ if (radix != 10)
{
*ptr = 0;
return string;
}
if (!value)
{
*ptr++ = 0x30;
*ptr = 0;
return string;
}
/* if this is a negative value insert the minus sign. */
if (value < 0)
{
*ptr++ = '-';
/* Make the value positive. */
value *= -1;
}
for (i = 10000; i > 0; i /= 10)
{
d = valu
e / i;
if (d || flag)
{
*ptr++ = (char)(d + 0x30);
value -= (d * i);
flag = 1;
}
}
/* Null terminate the string. */
*ptr = 0;
return string;
} /* NCL_Itoa */
/*
* 函数名：USART1_printf
* 描述：格式化输出，类似于C库中的printf，但这里没有用到C库* 输入：-USARTx 串口通道，这里只用到了串口1，即USART1
* -Data 要发送到串口的内容的指针
* -... 其他参数
* 输出：无
* 返回：无
* 调用：外部调用
* 典型应用USART1_printf( USART1, "\r\n this is a demo \r\n" ); * USART1_printf( USART1, "\r\n %d \r\n", i );
* USART1_printf( USART1, "\r\n %s \r\n", j );
*/
void USART1_printf(USART_TypeDef* USARTx, uint8_t *Data,...)
{
const char *s;
int d;
char buf[16];
va_list ap;
va_start(ap, Data);
while ( *Data != 0) // 判断是否到达字符串结束符
{
if ( *Data == 0x5c ) //'\'
{
switch ( *++Data )
{
case 'r': //回车符
USART_SendData(USARTx, 0x0d);
Data ++;
break;
case 'n': //换行符
USART_SendData(USARTx, 0x0a);
Data ++;
break;
default:
Data ++;
break;
}
}
else if ( *Data == '%')
{ //
switch ( *++Data )
{
case 's': //字符串s = va_arg(ap, const char *);
for ( ; *s; s++)
{
USART_SendData(USARTx,*s);
while( USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET );
}
Data++;
break;
case 'd': //十进制
d = va_arg(ap, int);
itoa(d, buf, 10);
for (s = buf; *s; s++)
{
USART_SendData(USARTx,*s);
while( USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET );
}
Data++;
break;
default:
Data++;
break;
}
} /* end of else if */
else USART_SendData(USARTx, *Data++);
while( USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET );
}
}
/******************* CHD1807 Team *****END OF FILE************/