RobotHardware-UESTC/Hardware/Firmware/GeekRobotBig_Firmware v1.0/DRV/bsp_usart.c

/*
********************************************************************************************************
<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>bsp_usart.c
<EFBFBD><EFBFBD>  <EFBFBD>ܣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD><EFBFBD><EFBFBD>
<EFBFBD><EFBFBD>  ע<EFBFBD><EFBFBD>
<EFBFBD><EFBFBD>  <EFBFBD><EFBFBD><EFBFBD><EFBFBD>https://shop60670850.taobao.com
<EFBFBD><EFBFBD>  <EFBFBD>ߣ<EFBFBD>lilianhe
<EFBFBD><EFBFBD>  <EFBFBD><EFBFBD>: 2017-2-8
*********************************************************************************************************
*/

/*
********************************************************************************************************
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD>
1.2017-2-8<EFBFBD><EFBFBD><EFBFBD><EFBFBD>дuart1<EFBFBD><EFBFBD><EFBFBD><EFBFBD>

*********************************************************************************************************
*/
#include "bsp_usart.h"
#include <stdio.h>

volatile unsigned char *rx_address;
volatile unsigned int rx_count;
volatile unsigned int rx_length;

/*
********************************************************************************************************
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƣ<EFBFBD>void USART1_Init(u32 bound)
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1<EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
Ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӣ<EFBFBD>PA9----TXD<EFBFBD><EFBFBD>PA10----RXD
<EFBFBD><EFBFBD>    ע<EFBFBD><EFBFBD>boundΪ<EFBFBD><EFBFBD><EFBFBD>ò<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
<EFBFBD><EFBFBD>    <EFBFBD><EFBFBD>:  2017-2-8
*********************************************************************************************************
*/
void USART1_Init(u32 bound)
{
	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_InitStructure.USART_BaudRate = bound;
	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;
	USART_Init(USART1, &USART_InitStructure);
	
	/* ʹ<>ܴ<EFBFBD><DCB4><EFBFBD>1<EFBFBD><31><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD> */
	USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
	
	USART_Cmd(USART1, ENABLE);
}




/// <20>ض<EFBFBD><D8B6><EFBFBD>c<EFBFBD>⺯<EFBFBD><E2BAAF>printf<74><66>USART1
int fputc(int ch, FILE *f)
{
	/* <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>ֽ<EFBFBD><D6BD><EFBFBD><EFBFBD>ݵ<EFBFBD>USART1 */
	USART_SendData(USART1, (uint8_t) ch);
	
	/* <20>ȴ<EFBFBD><C8B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
	while (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);		

	return (ch);
}

/// <20>ض<EFBFBD><D8B6><EFBFBD>c<EFBFBD>⺯<EFBFBD><E2BAAF>scanf<6E><66>USART1
int fgetc(FILE *f)
{
	/* <20>ȴ<EFBFBD><C8B4><EFBFBD><EFBFBD><EFBFBD>1<EFBFBD><31><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
	while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);

	return (int)USART_ReceiveData(USART1);
}
/*
********************************************************************************************************
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƣ<EFBFBD>void USART1_Send(unsigned char *tx_buf, int len)
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1<EFBFBD><EFBFBD><EFBFBD>ͺ<EFBFBD><EFBFBD><EFBFBD>
Ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӣ<EFBFBD>PA9----TXD<EFBFBD><EFBFBD>PA10----RXD
<EFBFBD><EFBFBD>    ע<EFBFBD><EFBFBD>
<EFBFBD><EFBFBD>    <EFBFBD><EFBFBD>:  2017-2-8
*********************************************************************************************************
*/
void USART1_Send(unsigned char *tx_buf, int len)
{
		USART_ClearFlag(USART1, USART_FLAG_TC);
		USART_ClearITPendingBit(USART1, USART_FLAG_TXE);
	while(len--)
	{
		USART_SendData(USART1, *tx_buf);
		while(USART_GetFlagStatus(USART1, USART_FLAG_TC) != 1);
		USART_ClearFlag(USART1, USART_FLAG_TC);
		USART_ClearITPendingBit(USART1, USART_FLAG_TXE);
		tx_buf++;
	}
	
}

/*
********************************************************************************************************
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƣ<EFBFBD>void USART1_Receive(unsigned char *rx_buf, int len)
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1<EFBFBD><EFBFBD><EFBFBD>պ<EFBFBD><EFBFBD><EFBFBD>
Ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӣ<EFBFBD>PA9----TXD<EFBFBD><EFBFBD>PA10----RXD
<EFBFBD><EFBFBD>    ע<EFBFBD><EFBFBD>
<EFBFBD><EFBFBD>    <EFBFBD><EFBFBD>:  2017-2-8
*********************************************************************************************************
*/
void USART1_Receive(unsigned char *rx_buf, int len)
{
	rx_count = 0;
	rx_length = len;
	rx_address = rx_buf;
}
/*
********************************************************************************************************
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƣ<EFBFBD>void USART1_IRQHandler(void)
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1<EFBFBD>жϷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
Ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӣ<EFBFBD>PA9----TXD<EFBFBD><EFBFBD>PA10----RXD
<EFBFBD><EFBFBD>    ע<EFBFBD><EFBFBD>
<EFBFBD><EFBFBD>    <EFBFBD><EFBFBD>:  2017-2-8
*********************************************************************************************************
*/
void USART1_IRQHandler(void)
{
	unsigned char Res;
	//u8 Res;
	if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)  //<2F><><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>(<28><><EFBFBD>յ<EFBFBD><D5B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݱ<EFBFBD><DDB1><EFBFBD><EFBFBD><EFBFBD>0x0d 0x0a<30><61>β)
	{
		
		Res = USART_ReceiveData(USART1);
	//	 printf("[USART1_IRQHandler],Rec_data = %x\r\n", Res);

		if(rx_length > rx_count)
		{
			*rx_address = Res;
			rx_address++;
			rx_count++;	
	}
			USART_ClearITPendingBit(USART1, USART_IT_RXNE);
			 
    } 	
}


/*********************************************END OF FILE**********************/