163 lines
4.7 KiB
C
163 lines
4.7 KiB
C
/*
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********************************************************************************************************
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文件名：bsp_usart.c
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功 能：串口函数
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备 注：
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淘 宝：https://shop60670850.taobao.com
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作 者：lilianhe
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日 期: 2017-2-8
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*********************************************************************************************************
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*/
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/*
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********************************************************************************************************
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更新日志：
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1.2017-2-8，编写uart1函数
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*********************************************************************************************************
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*/
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#include "bsp_usart.h"
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#include <stdio.h>
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volatile unsigned char *rx_address;
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volatile unsigned int rx_count;
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volatile unsigned int rx_length;
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/*
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********************************************************************************************************
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函数名称：void USART1_Init(u32 bound)
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函数功能：串口1初始化函数
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硬件连接：PA9----TXD，PA10----RXD
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备 注：bound为设置波特率
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日 期: 2017-2-8
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*********************************************************************************************************
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*/
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void USART1_Init(u32 bound)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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USART_InitTypeDef USART_InitStructure;
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/* config USART1 clock */
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
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/* USART1 GPIO config */
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/* Configure USART1 Tx (PA.09) as alternate function push-pull */
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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/* Configure USART1 Rx (PA.10) as input floating */
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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/* USART1 mode config */
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USART_InitStructure.USART_BaudRate = bound;
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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USART_InitStructure.USART_Parity = USART_Parity_No ;
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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USART_Init(USART1, &USART_InitStructure);
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/* 使能串口1接收中断 */
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USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
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USART_Cmd(USART1, ENABLE);
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}
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/// 重定向c库函数printf到USART1
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int fputc(int ch, FILE *f)
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{
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/* 发送一个字节数据到USART1 */
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USART_SendData(USART1, (uint8_t) ch);
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/* 等待发送完毕 */
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while (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
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return (ch);
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}
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/// 重定向c库函数scanf到USART1
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int fgetc(FILE *f)
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{
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/* 等待串口1输入数据 */
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while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);
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return (int)USART_ReceiveData(USART1);
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}
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/*
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********************************************************************************************************
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函数名称：void USART1_Send(unsigned char *tx_buf, int len)
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函数功能：串口1发送函数
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硬件连接：PA9----TXD，PA10----RXD
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备 注：
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日 期: 2017-2-8
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*********************************************************************************************************
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*/
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void USART1_Send(unsigned char *tx_buf, int len)
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{
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USART_ClearFlag(USART1, USART_FLAG_TC);
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USART_ClearITPendingBit(USART1, USART_FLAG_TXE);
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while(len--)
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{
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USART_SendData(USART1, *tx_buf);
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while(USART_GetFlagStatus(USART1, USART_FLAG_TC) != 1);
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USART_ClearFlag(USART1, USART_FLAG_TC);
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USART_ClearITPendingBit(USART1, USART_FLAG_TXE);
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tx_buf++;
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}
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}
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/*
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********************************************************************************************************
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函数名称：void USART1_Receive(unsigned char *rx_buf, int len)
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函数功能：串口1接收函数
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硬件连接：PA9----TXD，PA10----RXD
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备 注：
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日 期: 2017-2-8
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*********************************************************************************************************
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*/
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void USART1_Receive(unsigned char *rx_buf, int len)
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{
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rx_count = 0;
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rx_length = len;
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rx_address = rx_buf;
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}
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/*
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********************************************************************************************************
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函数名称：void USART1_IRQHandler(void)
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函数功能：串口1中断服务函数
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硬件连接：PA9----TXD，PA10----RXD
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备 注：
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日 期: 2017-2-8
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*********************************************************************************************************
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*/
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void USART1_IRQHandler(void)
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{
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unsigned char Res;
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//u8 Res;
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if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //接收中断(接收到的数据必须是0x0d 0x0a结尾)
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{
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Res = USART_ReceiveData(USART1);
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// printf("[USART1_IRQHandler],Rec_data = %x\r\n", Res);
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if(rx_length > rx_count)
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{
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*rx_address = Res;
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rx_address++;
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rx_count++;
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}
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USART_ClearITPendingBit(USART1, USART_IT_RXNE);
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}
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}
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/*********************************************END OF FILE**********************/
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