173 lines
5.6 KiB
C
173 lines
5.6 KiB
C
/*******************************************************************************
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* @file USART.c
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* @author: MQjehovah mail:MQjehovah@hotmail.com
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* @version 1.0.0
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* @date 2016.3.18
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* @brief
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******************************************************************************
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* @attention
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*******************************************************************************/
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/* Includes ------------------------------------------------------------------*/
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#include "USART.h"
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/* Definition ----------------------------------------------------------------*/
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#define Debug_USART USART1
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#ifdef __GNUC__
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/* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
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set to 'Yes') calls __io_putchar() */
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#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
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#else
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#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
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#endif /* __GNUC__ */
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GPIO_DEV * RS485EN = NULL;
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/* Functions -----------------------------------------------------------------*/
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/*******************************************************************************
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* @brief USART管脚配置
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* @param None
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* @retval None
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* @Note None
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*******************************************************************************/
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void USART_GPIO_Config(USART_TypeDef *USARTx)
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{
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if(USARTx == USART1)
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{
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GPIO_Config(&PA9,GPIO_Mode_AF_PP);
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GPIO_Config(&PA10,GPIO_Mode_IN_FLOATING);
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}
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if(USARTx == USART2)
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{
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GPIO_Config(&PA2,GPIO_Mode_AF_PP);
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GPIO_Config(&PA3,GPIO_Mode_IN_FLOATING);
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}
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if(USARTx == USART3)
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{
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GPIO_Config(&PB10,GPIO_Mode_AF_PP);
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GPIO_Config(&PB11,GPIO_Mode_IN_FLOATING);
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}
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// if(USARTx == USART4)
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// {
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// GPIO_Config(&PA9,GPIO_Mode_AF_PP);
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// GPIO_Config(&PA10,GPIO_Mode_IN_FLOATING);
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// }
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// if(USARTx == USART5)
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// {
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// GPIO_Config(&PA9,GPIO_Mode_AF_PP);
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// GPIO_Config(&PA10,GPIO_Mode_IN_FLOATING);
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// }
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}
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/*******************************************************************************
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* @brief USART初始化
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* @param None
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* @retval None
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* @Note None
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*******************************************************************************/
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void USART_Config(USART_TypeDef *USARTx,u16 Buand)
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{
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USART_InitTypeDef USART_InitStructure;
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USART_GPIO_Config(USARTx);
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USART_InitStructure.USART_BaudRate = Buand;
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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(USARTx, &USART_InitStructure);
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USART_Cmd(USARTx, ENABLE);
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}
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/*******************************************************************************
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* @brief 485初始化
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* @param None
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* @retval None
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* @Note None
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*******************************************************************************/
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void USART_485_Config(USART_TypeDef *USARTx,u16 Buand,GPIO_DEV *ENPIN)
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{
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RS485EN = ENPIN;
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GPIO_Config(RS485EN,GPIO_Mode_Out_PP);
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GPIO_WritePin(RS485EN,LOW);
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USART_Config(USARTx,Buand);
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}
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/*******************************************************************************
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* @brief USART发送一个字符
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* @param None
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* @retval None
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* @Note None
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*******************************************************************************/
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void USART_SendChar(USART_TypeDef *USARTx,char Data)
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{
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USART_SendData(USARTx,Data);
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while(USART_GetFlagStatus(USARTx, USART_FLAG_TXE) == RESET);
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}
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/*******************************************************************************
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* @brief 485发送一个字符
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* @param None
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* @retval None
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* @Note None
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*******************************************************************************/
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void USART_485_SendChar(USART_TypeDef *USARTx,char Data)
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{
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GPIO_WritePin(RS485EN,HIGH);
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USART_SendChar(USARTx,Data);
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GPIO_WritePin(RS485EN,LOW);
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}
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/*******************************************************************************
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* @brief USART发送字符串
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* @param None
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* @retval None
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* @Note None
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*******************************************************************************/
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void USART_SendStr(USART_TypeDef *USARTx,char* senddata)
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{
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int lenth=strlen(senddata);
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int i;
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for (i=0; i<lenth+1; i++)
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{
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USART_SendData(USARTx,*senddata++);
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while(USART_GetFlagStatus(USARTx, USART_FLAG_TXE) == RESET);
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}
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}
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/*******************************************************************************
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* @brief 485发送字符串
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* @param None
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* @retval None
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* @Note None
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*******************************************************************************/
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void USART_485_SendStr(USART_TypeDef *USARTx,char* senddata)
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{
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GPIO_WritePin(RS485EN,HIGH);
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USART_SendStr(USARTx,senddata);
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GPIO_WritePin(RS485EN,LOW);
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}
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//不使用半主机模式
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#if 1 //如果没有这段，则需要在target选项中选择使用USE microLIB
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#pragma import(__use_no_semihosting)
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struct __FILE
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{
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int handle;
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};
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FILE __stdout;
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void _sys_exit(int x)
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{
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x = x;
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}
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#endif
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PUTCHAR_PROTOTYPE
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{
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/* Place your implementation of fputc here */
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/* e.g. write a character to the USART */
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USART_SendData(Debug_USART,(u8)ch);
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/* Loop until the end of transmission */
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while (USART_GetFlagStatus(Debug_USART, USART_FLAG_TXE) == RESET);
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return ch;
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}
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/*********************************END OF FILE**********************************/
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