main.c

两块STM32间的SPI通信(DMA方式)

/**
  ******************************************************************************
  * @file    USART/DMA_Interrupt/main.c 
  * @author  MCD Application Team
  * @version V3.5.0
  * @date    08-April-2011
  * @brief   Main program body
  ******************************************************************************
  * @attention
  *
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  *
  * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
  ******************************************************************************
  */ 

/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include "platform_config.h"

/** @addtogroup STM32F10x_StdPeriph_Examples
  * @{
  */

/** @addtogroup USART_DMA_Interrupt
  * @{
  */ 

/* Private typedef -----------------------------------------------------------*/
typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus;

/* Private define ------------------------------------------------------------*/
#define SF_PIN_SCK         GPIO_Pin_13
#define SF_PIN_MISO        GPIO_Pin_14
#define SF_PIN_MOSI        GPIO_Pin_15

#define SF_CS             GPIO_Pin_12

#define GPIOx_led		  GPIOD
#define GPIO_Pin_x_led    GPIO_Pin_6

/* Private macro -------------------------------------------------------------*/
#define countof(a)   (sizeof(a) / sizeof(*(a)))

/* Private variables ---------------------------------------------------------*/
unsigned int i,j;

unsigned char a[10]={0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xaa}; 
unsigned char b[10]={0,0,0,0,0,0,0,0,0,0};
unsigned char SPI1_TX_Buf[10]={0x55};
unsigned char SPI2_RX_Buf[10];

/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
void DMA_Configuration(void);
void SPI2_Configuration(void);
void SPI1_Configuration(void);
void DMA1_Configuration(void);


/* Private functions ---------------------------------------------------------*/

/**
  * @brief  Main program
  * @param  None
  * @retval None
  */
int main(void)
{
  /* System Clocks Configuration */
  RCC_Configuration();
       
  /* NVIC configuration */
  //NVIC_Configuration();

  /* Configure the GPIO ports */
  GPIO_Configuration();

  /* Configure the SPI1 */
  SPI1_Configuration();//配置为DMA发送

  /* Configure the SPI2 */
  SPI2_Configuration();//配置为DMA接收

  /* Configure the DMA1 */
  DMA1_Configuration();

  while(1)
  {
		
		//发送部分	
		
		DMA_ClearFlag(DMA1_IT_TC3);      //清DMA发送完成标志
		DMA_Cmd(DMA1_Channel3, DISABLE);   //停止DMA
		DMA1_Channel3->CNDTR = 1;//重设传输长度
		DMA_Cmd(DMA1_Channel3, ENABLE);    //启动DMA 

		for(i=0; i<0x3fffff; i++);
		

		
		/*
		//接收部分
			
		if(SPI2_RX_Buf[j] == 0x55)
		{
			GPIO_ResetBits(GPIOx_led, GPIO_Pin_x_led);
			for(i=0; i<0x3fffff; i++);
			GPIO_SetBits(GPIOx_led, GPIO_Pin_x_led);
			for(i=0; i<0x3fffff; i++);
					
			j++;

			if(j == 10)
			{
				j = 0;	

			}
		}
		*/	  						
  }
}

/**
  * @brief  Configures the different system clocks.
  * @param  None
  * @retval None
  */
void RCC_Configuration(void)
{
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);    

  /* Enable GPIO clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC	| RCC_APB2Periph_GPIOD
                       | RCC_APB2Periph_GPIOF | RCC_APB2Periph_SPI1 | RCC_APB2Periph_AFIO, ENABLE);
 
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
}

/**
  * @brief  Configures the different GPIO ports.
  * @param  None
  * @retval None
  */
void GPIO_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

 	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_x_led;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOx_led, &GPIO_InitStructure);
	
	GPIO_SetBits(GPIOx_led, GPIO_Pin_x_led); 

	//SPI1
	/* 配置SPI引脚SCK、MISO 和 MOSI为复用推挽模式 */
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7; //SF_PIN_SCK | SF_PIN_MISO | SF_PIN_MOSI;
	//GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15 | GPIO_Pin_14;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOA, &GPIO_InitStructure);

	/* 配置片选口线为推挽输出模式 */
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
	GPIO_Init(GPIOA, &GPIO_InitStructure);
	GPIO_ResetBits(GPIOA, GPIO_Pin_4);

	//SPI2
	/* 配置SPI引脚SCK、MISO 和 MOSI为复用推挽模式 */
	GPIO_InitStructure.GPIO_Pin = SF_PIN_SCK | SF_PIN_MISO | SF_PIN_MOSI;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOB, &GPIO_InitStructure);

	/* 配置片选口线为推挽输出模式 */
	GPIO_InitStructure.GPIO_Pin = SF_CS;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
	GPIO_Init(GPIOB, &GPIO_InitStructure);

}

/**
  * @brief  Configures the nested vectored interrupt controller.
  * @param  None
  * @retval None
  */
void NVIC_Configuration(void)
{
   NVIC_InitTypeDef NVIC_InitStructure;

  /* Enable the USART1 Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

  /* Enable the USARTz Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel5_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}


/**
  * @brief  Configures the SPI2.
  * @param  None
  * @retval None
  */
void SPI2_Configuration(void)
{
	SPI_InitTypeDef  SPI_InitStructure;

	/* 配置SPI硬件参数 */
	SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;	/* 数据方向：2线全双工 */
	SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;		/* STM32的SPI工作模式 ：主机模式 */
	SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;	/* 数据位长度 ： 8位 */
	/* SPI_CPOL和SPI_CPHA结合使用决定时钟和数据采样点的相位关系、
	   本例配置: 总线空闲是高电平,第2个边沿（上升沿采样数据)
	*/
	SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;			/* 时钟上升沿采样数据 */
	SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;		/* 时钟的第2个边沿采样数据 */
	SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;			/* 片选控制方式：软件控制 */
	SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;	/* 波特率预分频系数：4分频 */
	SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;	/* 数据位传输次序：高位先传 */
	SPI_InitStructure.SPI_CRCPolynomial = 7;			/* CRC多项式寄存器，复位后为7。本例程不用 */
	SPI_Init(SPI2, &SPI_InitStructure);

    // Enable DMA1 Channel4 //
    DMA_Cmd(DMA1_Channel4, ENABLE);

	SPI_I2S_DMACmd(SPI2, SPI_I2S_DMAReq_Rx, ENABLE);

	SPI_Cmd(SPI2, ENABLE);		/* 使能SPI  */

}

/**
  * @brief  Configures the SPI1.
  * @param  None
  * @retval None
  */
void SPI1_Configuration(void)
{
	SPI_InitTypeDef  SPI_InitStructure;

	/* 配置SPI硬件参数 */
	SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;	/* 数据方向：2线全双工 */
	SPI_InitStructure.SPI_Mode = SPI_Mode_Master;		/* STM32的SPI工作模式 ：主机模式 */
	SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;	/* 数据位长度 ： 8位 */
	/* SPI_CPOL和SPI_CPHA结合使用决定时钟和数据采样点的相位关系、
	   本例配置: 总线空闲是高电平,第2个边沿（上升沿采样数据)
	*/
	SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;			/* 时钟上升沿采样数据 */
	SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;		/* 时钟的第2个边沿采样数据 */
	SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;			/* 片选控制方式：软件控制 */
	SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;	/* 波特率预分频系数：4分频 */
	SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;	/* 数据位传输次序：高位先传 */
	SPI_InitStructure.SPI_CRCPolynomial = 7;			/* CRC多项式寄存器，复位后为7。本例程不用 */
	SPI_Init(SPI1, &SPI_InitStructure);

    // Enable DMA1 Channel3 //
    DMA_Cmd(DMA1_Channel3, ENABLE);

	SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx, ENABLE);

	SPI_Cmd(SPI1, ENABLE);		/* 使能SPI  */



}

/**
  * @brief  Configures the SPI1.
  * @param  None
  * @retval None
  */
void DMA1_Configuration(void)
{
	DMA_InitTypeDef  DMA_InitStructure;

	//发送通道
	DMA_DeInit(DMA1_Channel3);
	DMA_InitStructure.DMA_PeripheralBaseAddr =(u32)&SPI1->DR;//SPI1的DR寄存器地址
	DMA_InitStructure.DMA_MemoryBaseAddr = (u32)SPI1_TX_Buf;
	DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;  //外设地址是目的地
	DMA_InitStructure.DMA_BufferSize = 1;
	DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
	DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;  //DMA内存地址自动增加模式
	DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
	DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
	DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;    //循环模式
	DMA_InitStructure.DMA_Priority = DMA_Priority_High;
	DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
	DMA_Init(DMA1_Channel3, &DMA_InitStructure);

	DMA_Cmd(DMA1_Channel3,ENABLE);

	//接收通道
	DMA_DeInit(DMA1_Channel4);
	DMA_InitStructure.DMA_PeripheralBaseAddr =(u32)&SPI2->DR;//SPI2的DR寄存器地址
	DMA_InitStructure.DMA_MemoryBaseAddr = (u32)SPI2_RX_Buf;
	DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;  //外设地址是目的地
	DMA_InitStructure.DMA_BufferSize = 10;
	DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
	DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;  //DMA内存地址自动增加模式
	DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
	DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
	DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;    //循环模式
	DMA_InitStructure.DMA_Priority = DMA_Priority_High;
	DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
	DMA_Init(DMA1_Channel4, &DMA_InitStructure);

	DMA_Cmd(DMA1_Channel4,ENABLE);
}
/**
  * @}
  */ 

/**
  * @}
  */ 

/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/