STM32H750XB_RT-THREAD/41-RS485通信实验/User/485/bsp_485.c

/**
  ******************************************************************************
  * @file    bsp_485.c
  * @author  fire
  * @version V1.0
  * @date    2019-xx-xx
  * @brief   485<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
  ******************************************************************************
  * @attention
  *
  * ʵ<EFBFBD><EFBFBD>ƽ̨:Ұ<EFBFBD><EFBFBD> STM32 H750 <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>  
  * <EFBFBD><EFBFBD>̳    :http://www.firebbs.cn
  * <EFBFBD>Ա<EFBFBD>    :http://fire-stm32.taobao.com
  *
  ******************************************************************************
  */ 
#include "./485/bsp_485.h"
#include <stdarg.h>


static void Delay(__IO uint32_t nCount); 

UART_HandleTypeDef Uart2_Handle;

/// <20><><EFBFBD><EFBFBD>USART<52><54><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>
static void NVIC_Configuration(void)
{	
	/* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><D5BC><EFBFBD>ȼ<EFBFBD><C8BC>ķ<EFBFBD><C4B7><EFBFBD> */
	HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_0);
	/*<2A>ж<EFBFBD><D0B6><EFBFBD><EFBFBD>ã<EFBFBD><C3A3><EFBFBD>ռ<EFBFBD><D5BC><EFBFBD>ȼ<EFBFBD>0<EFBFBD><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȼ<EFBFBD>Ϊ0*/
	HAL_NVIC_SetPriority(_485_INT_IRQ, 1 ,1);
	HAL_NVIC_EnableIRQ(_485_INT_IRQ);
}
/*
 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>_485_Config
 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD>  <EFBFBD><EFBFBD>USART GPIO <EFBFBD><EFBFBD><EFBFBD><EFBFBD>,<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģʽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD>  <EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD>  : <EFBFBD><EFBFBD>
 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD>  <EFBFBD><EFBFBD><EFBFBD>ⲿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 */
void _485_Config(void)
{
	GPIO_InitTypeDef GPIO_InitStruct;
  
  _485_USART_RX_GPIO_CLK_ENABLE();
  _485_USART_TX_GPIO_CLK_ENABLE();
  _485_RE_GPIO_CLK_ENABLE();
  
  /* ʹ<><CAB9> UART ʱ<><CAB1> */
  _485_USART_CLK_ENABLE();

  /**USART2 GPIO Configuration    
  PD5    ------> USART2_TX
  PD6    ------> USART2_RX 
  */
  /* <20><><EFBFBD><EFBFBD>Tx<54><78><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD>ù<EFBFBD><C3B9><EFBFBD>  */
  GPIO_InitStruct.Pin = _485_USART_TX_PIN;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_InitStruct.Alternate = _485_USART_TX_AF;
  HAL_GPIO_Init(_485_USART_TX_GPIO_PORT, &GPIO_InitStruct);
  
  /* <20><><EFBFBD><EFBFBD>Rx<52><78><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD>ù<EFBFBD><C3B9><EFBFBD> */
  GPIO_InitStruct.Pin = _485_USART_RX_PIN;
  GPIO_InitStruct.Alternate = _485_USART_RX_AF;
  HAL_GPIO_Init(_485_USART_RX_GPIO_PORT, &GPIO_InitStruct); 
  
 /* 485<38>շ<EFBFBD><D5B7><EFBFBD><EFBFBD>ƹܽ<C6B9> */
  GPIO_InitStruct.Pin = _485_RE_PIN;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  HAL_GPIO_Init(_485_RE_GPIO_PORT, &GPIO_InitStruct);
  
  /* <20><><EFBFBD>ô<EFBFBD>485_USART ģʽ */
  Uart2_Handle.Instance = _485_USART;
  Uart2_Handle.Init.BaudRate = _485_USART_BAUDRATE;
  Uart2_Handle.Init.WordLength = UART_WORDLENGTH_8B;
  Uart2_Handle.Init.StopBits = UART_STOPBITS_1;
  Uart2_Handle.Init.Parity = UART_PARITY_NONE;
  Uart2_Handle.Init.Mode = UART_MODE_TX_RX;
  Uart2_Handle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  Uart2_Handle.Init.OverSampling = UART_OVERSAMPLING_16;
  HAL_UART_Init(&Uart2_Handle);

  /*<2A><><EFBFBD><EFBFBD>1<EFBFBD>жϳ<D0B6>ʼ<EFBFBD><CABC> */
  NVIC_Configuration();
  /*<2A><><EFBFBD>ô<EFBFBD><C3B4>ڽ<EFBFBD><DABD><EFBFBD><EFBFBD>ж<EFBFBD> */
  __HAL_UART_ENABLE_IT(&Uart2_Handle,UART_IT_RXNE);
  //Ĭ<>Ͻ<EFBFBD><CFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģʽ
  HAL_GPIO_WritePin(_485_RE_GPIO_PORT,_485_RE_PIN,GPIO_PIN_RESET);
}


/***************** <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>ַ<EFBFBD>  **********************/
//ʹ<>õ<EFBFBD><C3B5>ֽ<EFBFBD><D6BD><EFBFBD><EFBFBD>ݷ<EFBFBD><DDB7><EFBFBD>ǰҪʹ<D2AA>ܷ<EFBFBD><DCB7><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ţ<EFBFBD><C5A3><EFBFBD><EFBFBD>ͺ<EFBFBD>Ҫʹ<D2AA>ܽ<EFBFBD><DCBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD>
void _485_SendByte(  uint8_t ch )
{
	/* <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>ֽ<EFBFBD><D6BD><EFBFBD><EFBFBD>ݵ<EFBFBD>USART2 */
    HAL_UART_Transmit(&Uart2_Handle, (uint8_t *)&ch, 1, 0xFFFF);	
    while(__HAL_UART_GET_FLAG(&Uart2_Handle, UART_FLAG_TXE) == 0);
}
/*****************  <20><><EFBFBD><EFBFBD>ָ<EFBFBD><D6B8><EFBFBD><EFBFBD><EFBFBD>ȵ<EFBFBD><C8B5>ַ<EFBFBD><D6B7><EFBFBD> **********************/
void _485_SendStr_length( uint8_t *str,uint32_t strlen )
{
	unsigned int k=0;

	_485_TX_EN()	;//	ʹ<>ܷ<EFBFBD><DCB7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>	
    do 
    {
        _485_SendByte( *(str + k) );
        k++;
    } while(k < strlen);
		
	/*<2A>Ӷ<EFBFBD><D3B6><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD>֤485<38><35><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>*/
	Delay(0xFFF);
		
	_485_RX_EN()	;//	ʹ<>ܽ<EFBFBD><DCBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
}


/*****************  <20><><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD> **********************/
void _485_SendString(  uint8_t *str)
{
	unsigned int k=0;
	
	_485_TX_EN()	;//	ʹ<>ܷ<EFBFBD><DCB7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	
    do 
    {
        _485_SendByte(  *(str + k) );
        k++;
    } while(*(str + k)!='\0');
	
	/*<2A>Ӷ<EFBFBD><D3B6><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD>֤485<38><35><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>*/
	Delay(0xFFF);
		
	_485_RX_EN()	;//	ʹ<>ܽ<EFBFBD><DCBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
}



//<2F>жϻ<D0B6><CFBB>洮<EFBFBD><E6B4AE><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
#define UART_BUFF_SIZE      1024
volatile    uint16_t uart_p = 0;
uint8_t     uart_buff[UART_BUFF_SIZE];

void bsp_485_IRQHandler(void)
{
    if(uart_p<UART_BUFF_SIZE)
    {
        if(__HAL_UART_GET_IT_SOURCE( &Uart2_Handle, UART_IT_RXNE ) != RESET)
        {
            HAL_UART_Receive(&Uart2_Handle, (uint8_t *)(&uart_buff[uart_p]),1 , 1000);
            uart_p++;
        }
    }
	else
	{
		clean_rebuff();       
	}
	HAL_UART_IRQHandler(&Uart2_Handle);
}

//<2F><>ȡ<EFBFBD><C8A1><EFBFBD>յ<EFBFBD><D5B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݺͳ<DDBA><CDB3><EFBFBD>
char *get_rebuff(uint16_t *len) 
{
    *len = uart_p;
    return (char *)&uart_buff;
}

//<2F><><EFBFBD>ջ<EFBFBD><D5BB><EFBFBD><EFBFBD><EFBFBD>
void clean_rebuff(void) 
{

    uint16_t i=UART_BUFF_SIZE+1;
    uart_p = 0;
	while(i)
		uart_buff[--i]=0;
}

static void Delay(__IO uint32_t nCount)	 //<2F>򵥵<EFBFBD><F2B5A5B5><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD>
{
	for(; nCount != 0; nCount--);
}