usart.c

基于STM32的数码相册.rar

/* filename: usart.c */
#include "stm32f10x_lib.h"
#include "usart.h"

void USART_Config(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | 
            RCC_APB2Periph_AFIO |
            RCC_APB2Periph_USART1 , 
            ENABLE);

    /* Configure USART1_Tx as alternate function push-pull */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    /* Configure USART1_Rx as input floating */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    USART_InitStructure.USART_BaudRate = 115200;
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    USART_InitStructure.USART_StopBits = USART_StopBits_1;
    USART_InitStructure.USART_Parity = USART_Parity_No ;
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

    /* Configure the USARTx */ 
    USART_Init(USART1, &USART_InitStructure);
    /* Enable the USARTx */
    USART_Cmd(USART1, ENABLE);
}

void USART1_Putc(unsigned char c)
{
    USART_SendData(USART1, c);
    while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET );
}

void USART1_Puts(char * str)
{
    while(*str)
    {
        USART_SendData(USART1, *str++);
        /* Loop until the end of transmission */
        while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
    }

}