GeBalanceBot/Hardware/Firmware/GeBalanceBot_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);
}

#pragma import(__use_no_semihosting)             
//<2F><>׼<EFBFBD><D7BC><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA>֧<EFBFBD>ֺ<EFBFBD><D6BA><EFBFBD>                 
struct __FILE 
{ 
	int handle; 
}; 

FILE __stdout;       
//<2F><><EFBFBD><EFBFBD>_sys_exit()<29>Ա<EFBFBD><D4B1><EFBFBD>ʹ<EFBFBD>ð<EFBFBD><C3B0><EFBFBD><EFBFBD><EFBFBD>ģʽ    
void _sys_exit(int x) 
{ 
	x = x; 
} 


/// <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(USART2, (uint8_t)ch);
//    /* <20>ȴ<EFBFBD><C8B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
//    while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET);
//    return (ch);
	
	while((USART1->SR&0X40)==0);// ʹ<>ô<EFBFBD><C3B4><EFBFBD>1   
	USART1->DR = (u8) ch;      
	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);
	
//	while((USART1->SR&0X40)==0);// ʹ<>ô<EFBFBD><C3B4><EFBFBD>1   
//	USART1->DR = (u8) ch;      
//	return ch;
}


/*
********************************************************************************************************
<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) // <20><><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);
    }
}