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   源码介绍

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DMX512 UART1模拟,485对外通讯或接收 

#include "usart3.h"
#include "led.h"
/**
  ******************************************************************************
  * @file    bsp_usart.c
  * @author  fire
  * @version V1.0
  * @date    2013-xx-xx
  * @brief   Öض¨Ïòc¿âprintfº¯Êýµ½usart¶Ë¿Ú
  ******************************************************************************
  * @attention
  *
  * ʵÑéƽ̨:±ü»ðSTM32 F103-MINI ¿ª·¢°å  
  * ÂÛ̳    :http://www.firebbs.cn
  * ÌÔ±¦    :https://fire-stm32.taobao.com
  *
  ******************************************************************************
  */ 
 /**
  * @brief  ÅäÖÃǶÌ×ÏòÁ¿ÖжϿØÖÆÆ÷NVIC
  * @param  ÎÞ
  * @retval ÎÞ
  */
u8 uart2RxEnd;
static void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;
  
  /* ǶÌ×ÏòÁ¿ÖжϿØÖÆÆ÷×éÑ¡Ôñ */
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
  
  /* ÅäÖÃUSARTΪÖжÏÔ´ */
  NVIC_InitStructure.NVIC_IRQChannel = DEBUG_USART_IRQ;
  /* ÇÀ¶ÏÓÅÏȼ¶*/
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority =0;
  /* ×ÓÓÅÏȼ¶ */
  NVIC_InitStructure.NVIC_IRQChannelSubPriority =1;
  /* ʹÄÜÖÐ¶Ï */
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  /* ³õʼ»¯ÅäÖÃNVIC */
  NVIC_Init(&NVIC_InitStructure);
}

 /**
  * @brief  USART GPIO ÅäÖÃ,¹¤×÷²ÎÊýÅäÖÃ
  * @param  ÎÞ
  * @retval ÎÞ
  */
void USART_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;

// ´ò¿ª´®¿ÚGPIOµÄʱÖÓ
DEBUG_USART_GPIO_APBxClkCmd(DEBUG_USART_GPIO_CLK, ENABLE);

// ´ò¿ª´®¿ÚÍâÉèµÄʱÖÓ
DEBUG_USART_APBxClkCmd(DEBUG_USART_CLK, ENABLE);

// ½«USART TxµÄGPIOÅäÖÃΪÍÆÍ츴ÓÃģʽ
GPIO_InitStructure.GPIO_Pin = DEBUG_USART_TX_GPIO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(DEBUG_USART_TX_GPIO_PORT, &GPIO_InitStructure);
  // ½«USART RxµÄGPIOÅäÖÃΪ¸¡¿ÕÊäÈëģʽ
GPIO_InitStructure.GPIO_Pin = DEBUG_USART_RX_GPIO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(DEBUG_USART_RX_GPIO_PORT, &GPIO_InitStructure);

// ÅäÖô®¿ÚµÄ¹¤×÷²ÎÊý
// ÅäÖò¨ÌØÂÊ
USART_InitStructure.USART_BaudRate = DEBUG_USART_BAUDRATE;
// ÅäÖà ÕëÊý¾Ý×Ö³¤
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
// ÅäÖÃֹͣλ
USART_InitStructure.USART_StopBits = USART_StopBits_1;
// ÅäÖÃУÑéλ
USART_InitStructure.USART_Parity = USART_Parity_No ;
// ÅäÖÃÓ²¼þÁ÷¿ØÖÆ
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
// ÅäÖù¤×÷ģʽ£¬ÊÕ·¢Ò»Æð
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
// Íê³É´®¿ÚµÄ³õʼ»¯ÅäÖÃ
USART_Init(DEBUG_USARTx, &USART_InitStructure);

// ´®¿ÚÖжÏÓÅÏȼ¶ÅäÖÃ
NVIC_Configuration();

// ʹÄÜ´®¿Ú½ÓÊÕÖжÏ
USART_ITConfig(DEBUG_USARTx, USART_IT_RXNE, ENABLE);

// ʹÄÜ´®¿Ú
USART_Cmd(DEBUG_USARTx, ENABLE);
   RS485_RX;
  // Çå³ý·¢ËÍÍê³É±êÖ¾
//USART_ClearFlag(USART1, USART_FLAG_TC);     
}

/*****************  ·¢ËÍÒ»¸ö×Ö·û **********************/
void Usart_SendByte( USART_TypeDef * pUSARTx, uint8_t ch)
{

  RS485_TX; 
  
/* ·¢ËÍÒ»¸ö×Ö½ÚÊý¾Ýµ½USART */
USART_SendData(pUSARTx,ch);

/* µÈ´ý·¢ËÍÊý¾Ý¼Ä´æÆ÷Ϊ¿Õ */
while (USART_GetFlagStatus(pUSARTx, USART_FLAG_TXE) == RESET);
    RS485_RX;
}

/*****************  ·¢ËÍ×Ö·û´® **********************/
void Usart_SendString( USART_TypeDef * pUSARTx, char *str)
{
unsigned int k=0;

    RS485_TX;   
  do 
  {
      Usart_SendByte( pUSARTx, *(str k) );
      k ;
  } while(*(str k)!='\0');
  
  /* µÈ´ý·¢ËÍÍê³É */
  while(USART_GetFlagStatus(pUSARTx,USART_FLAG_TC)==RESET)
  {}
   RS485_RX;

}

/*!  \fn USART2_Put_Data(unsigned char * str, unsigned int len)
 * \brief USART2 put char out.
 *   \param str string's pointer, which need to be put out.
 */
void Usart_Put_Data(unsigned char * str, unsigned int len)
{

    RS485_TX;   
    while(len)
    {
        USART_SendData(USART3, *str ); 
        while(USART_GetFlagStatus(USART3, USART_FLAG_TC) != SET);
len--;
    }    
   RS485_RX;

}

/*****************  ·¢ËÍÒ»¸ö16λÊý **********************/
void Usart_SendHalfWord( USART_TypeDef * pUSARTx, uint16_t ch)
{
uint8_t temp_h, temp_l;

    RS485_TX;   /* È¡³ö¸ß°Ëλ */
temp_h = (ch&0XFF00)>>8;
/* È¡³öµÍ°Ëλ */
temp_l = ch&0XFF;

/* ·¢Ë͸߰Ëλ */
USART_SendData(pUSARTx,temp_h);
while (USART_GetFlagStatus(pUSARTx, USART_FLAG_TXE) == RESET);

/* ·¢Ë͵ͰËλ */
USART_SendData(pUSARTx,temp_l);
while (USART_GetFlagStatus(pUSARTx, USART_FLAG_TXE) == RESET);

RS485_RX;
}
/////Öض¨Ïòc¿âº¯Êýprintfµ½´®¿Ú£¬Öض¨Ïòºó¿ÉʹÓÃprintfº¯Êý
//int fputc(int ch, FILE *f)
//{
// /* ·¢ËÍÒ»¸ö×Ö½ÚÊý¾Ýµ½´®¿Ú */
// USART_SendData(DEBUG_USARTx, (uint8_t) ch);
//
// /* µÈ´ý·¢ËÍÍê±Ï */
// while (USART_GetFlagStatus(DEBUG_USARTx, USART_FLAG_TXE) == RESET);
//
// return (ch);
//}