main.c

STM32 库文件

/**
  ******************************************************************************
  * @file DMA/SPI_RAM/main.c 
  * @author  MCD Application Team
  * @version  V3.0.0
  * @date  04/06/2009
  * @brief  Main program body
  ******************************************************************************
  * @copy
  *
  * 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 2009 STMicroelectronics</center></h2>
  */ 

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

/** @addtogroup StdPeriph_Examples
  * @{
  */

/** @addtogroup DMA_SPI_RAM
  * @{
  */ 

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

/* Private define ------------------------------------------------------------*/
#define SPI1_DR_Address    0x4001300C
#define SPI2_DR_Address    0x4000380C
#define BufferSize         32
#define CRCPolynomial      7

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
SPI_InitTypeDef    SPI_InitStructure;
DMA_InitTypeDef    DMA_InitStructure;
uint8_t SPI1_Buffer_Rx[BufferSize], SPI2_Buffer_Rx[BufferSize];
uint8_t SPI1CRCValue = 0, SPI2CRCValue = 0;
volatile TestStatus TransferStatus1 = FAILED, TransferStatus2 = FAILED;
uint8_t SPI1_Buffer_Tx[BufferSize] = {0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,
                                 0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,0x10,0x11,0x12,
                                 0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A,0x1B,
                                 0x1C,0x1D,0x1E,0x1F,0x20};
uint8_t SPI2_Buffer_Tx[BufferSize] = {0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,
                                 0x5A,0x5B,0x5C,0x5D,0x5E,0x5F,0x60,0x61,0x62,
                                 0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,0x6B,
                                 0x6C,0x6D,0x6E,0x6F,0x70};

/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
TestStatus Buffercmp(uint8_t* pBuffer, uint8_t* pBuffer1, uint16_t BufferLength);

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

/**
  * @brief  Main program
  * @param  None
  * @retval : None
  */
int main(void)
{
  /* System Clocks Configuration */
  RCC_Configuration();
       
  /* Configure the GPIO ports */
  GPIO_Configuration();

  /* SPI1 configuration ------------------------------------------------------*/
  SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
  SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
  SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
  SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
  SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;
  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
  SPI_InitStructure.SPI_CRCPolynomial = CRCPolynomial;
  SPI_Init(SPI1, &SPI_InitStructure);
  
  /* SPI2 configuration ------------------------------------------------------*/
  SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;
  SPI_Init(SPI2, &SPI_InitStructure);

  /* DMA1 Channel2 configuration ----------------------------------------------*/
  DMA_DeInit(DMA1_Channel2);
  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SPI1_DR_Address;
  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)SPI1_Buffer_Rx;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
  DMA_InitStructure.DMA_BufferSize = BufferSize;
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
  DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;
  DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
  DMA_Init(DMA1_Channel2, &DMA_InitStructure);

  /* DMA1 Channel3 configuration ----------------------------------------------*/
  DMA_DeInit(DMA1_Channel3);  
  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SPI1_DR_Address;
  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)SPI1_Buffer_Tx;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
  DMA_InitStructure.DMA_Priority = DMA_Priority_Low;
  DMA_Init(DMA1_Channel3, &DMA_InitStructure);

  /* DMA1 Channel4 configuration ----------------------------------------------*/
  DMA_DeInit(DMA1_Channel4);  
  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SPI2_DR_Address;
  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)SPI2_Buffer_Rx;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
  DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
  DMA_Init(DMA1_Channel4, &DMA_InitStructure);

  /* DMA1 Channel5 configuration ----------------------------------------------*/
  DMA_DeInit(DMA1_Channel5);  
  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SPI2_DR_Address;
  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)SPI2_Buffer_Tx;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
  DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;
  DMA_Init(DMA1_Channel5, &DMA_InitStructure);

  /* Enable SPI1 DMA Tx request */
  SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx, ENABLE);
  /* Enable SPI1 DMA Rx request */
  SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Rx, ENABLE);
  /* Enable SPI2 DMA Tx request */
  SPI_I2S_DMACmd(SPI2, SPI_I2S_DMAReq_Tx, ENABLE);
  /* Enable SPI2 DMA Rx request */
  SPI_I2S_DMACmd(SPI2, SPI_I2S_DMAReq_Rx, ENABLE);
 
  /* Enable SPI1 CRC calculation */
  SPI_CalculateCRC(SPI1, ENABLE);
  /* Enable SPI2 CRC calculation */
  SPI_CalculateCRC(SPI2, ENABLE);

  /* Enable SPI2 */
  SPI_Cmd(SPI2, ENABLE);
  /* Enable SPI1 */
  SPI_Cmd(SPI1, ENABLE);

  /* Enable DMA1 channel5, channel4, channel3 and channel2 */
  DMA_Cmd(DMA1_Channel2, ENABLE);
  DMA_Cmd(DMA1_Channel4, ENABLE);
  DMA_Cmd(DMA1_Channel5, ENABLE);
  DMA_Cmd(DMA1_Channel3, ENABLE);
   
  /* Transfer complete */
  while(!DMA_GetFlagStatus(DMA1_FLAG_TC2));
  while(!DMA_GetFlagStatus(DMA1_FLAG_TC4));
  while(!DMA_GetFlagStatus(DMA1_FLAG_TC5));
  while(!DMA_GetFlagStatus(DMA1_FLAG_TC3));

  /* Wait for SPI1 data reception: CRC transmitted by SPI2 */
  while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE)==RESET);
  /* Wait for SPI2 data reception: CRC transmitted by SPI1 */
  while(SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE)==RESET);

  /* Check the corectness of written dada */
  TransferStatus1 = Buffercmp(SPI2_Buffer_Rx, SPI1_Buffer_Tx, BufferSize);
  TransferStatus2 = Buffercmp(SPI1_Buffer_Rx, SPI2_Buffer_Tx, BufferSize);
  /* TransferStatus1, TransferStatus2 = PASSED, if the data transmitted and received 
     are correct */
  /* TransferStatus1, TransferStatus2 = FAILED, if the data transmitted and received  
     are different */

  /* Test on the SPI1 CRCR ERROR flag */
  if ((SPI_I2S_GetFlagStatus(SPI1, SPI_FLAG_CRCERR)) != RESET)
  {
    TransferStatus1 = FAILED;
  }
  /* Test on the SPI2 CRCR ERROR flag */
  if ((SPI_I2S_GetFlagStatus(SPI2, SPI_FLAG_CRCERR)) != RESET)
  {
    TransferStatus2 = FAILED;
  } 

  /* Read SPI1 received CRC value */
  SPI1CRCValue = SPI_I2S_ReceiveData(SPI1);
  /* Read SPI2 received CRC value */
  SPI2CRCValue = SPI_I2S_ReceiveData(SPI2);

  while (1)
  {
  }
}

/**
  * @brief  Configures the different system clocks.
  * @param  None
  * @retval : None
  */
void RCC_Configuration(void)
{
  /* Setup the microcontroller system. Initialize the Embedded Flash Interface,  
     initialize the PLL and update the SystemFrequency variable. */
  SystemInit();

/* Enable peripheral clocks --------------------------------------------------*/
  /* Enable DMA1 clock */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
  /* Enable GPIOA, GPIOB and SPI1 clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB |
                         RCC_APB2Periph_SPI1, ENABLE);
  /* Enable SPI2 Periph clock */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
}

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

  /* Configure SPI1 pins: SCK, MISO and MOSI */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* Configure SPI2 pins: SCK, MISO and MOSI */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
}

/**
  * @brief  Compares two buffers.
  * @param pBuffer, pBuffer1: buffers to be compared.
  * @param BufferLength: buffer's length
  * @retval : PASSED: pBuffer identical to pBuffer1
  *   FAILED: pBuffer differs from pBuffer1
  */
TestStatus Buffercmp(uint8_t* pBuffer, uint8_t* pBuffer1, uint16_t BufferLength)
{
  while(BufferLength--)
  {
    if(*pBuffer != *pBuffer1)
    {
      return FAILED;
    }
    
    pBuffer++;
    pBuffer1++;
  }

  return PASSED;  
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *   where the assert_param error has occurred.
  * @param file: pointer to the source file name
  * @param line: assert_param error line source number
  * @retval : None
  */
void assert_failed(uint8_t* file, uint32_t line)
{ 
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  /* Infinite loop */
  while (1)
  {
  }
}
#endif

/**
  * @}
  */ 

/**
  * @}
  */ 

/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/