STM8S_StdPeriph_Examples/SPI/SPI_FastCommunicationMicroSD/main.c

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/**
  ******************************************************************************
  * @file    SPI_FastCommunicationMicroSD\main.c
  * @author  MCD Application Team
  * @version  V2.2.0
  * @date     30-September-2014
  * @brief   This file contains the main function for SPI fast communication example.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing, software 
  * distributed under the License is distributed on an "AS IS" BASIS, 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************************
  */ 

/* Includes ------------------------------------------------------------------*/
#include "stm8s.h"
#include "stm8s_eval.h"
#include "stm8s_eval_spi_sd.h"

/**
  * @addtogroup SPI_FastCommunicationMicroSD
  * @{
  */

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

/* Private define ------------------------------------------------------------*/
#define BUFFER_SIZE (countof(TxBuffer)-1)

/* Private variables ---------------------------------------------------------*/
__IO uint16_t Status = 0;
uint8_t TxBuffer[] = "STM8S SPI Firmware Library Example: communication with a microSD card";
uint8_t RxBuffer[BUFFER_SIZE] = {0};
__IO ErrorStatus TransferStatus = ERROR;

/* Private function prototypes -----------------------------------------------*/
void Delay (uint16_t nCount);
static ErrorStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);
static void CLK_Config(void);
static void GPIO_Config(void);
/* Private functions ---------------------------------------------------------*/
/* Global variables ----------------------------------------------------------*/
/* Public functions ----------------------------------------------------------*/

/**
  * @brief  Main program.
  * @param  None
  * @retval None
  */
void main(void)
{
    /* Clock configuration -----------------------------------------*/
    CLK_Config();
    
    /* GPIO Configuration ------------------------------------------*/
    GPIO_Config();

                
   /***********************SPI and MSD Card initialization******************/

    while (SD_Detect() == SD_NOT_PRESENT);
    {
      /* Wait MicroSD card insertion */
    }

    Delay(0xFFFF);
    /* Init the flash micro SD*/
    Status = SD_Init();

  /***************************Block Read/Write******************************/
  /* Write block of 512 bytes on address 0 */
  SD_WriteBlock(TxBuffer, 0, BUFFER_SIZE);

  /* Read block of 512 bytes from address 0 */
  SD_ReadBlock(RxBuffer, 0, BUFFER_SIZE);

  /* Check data */
  TransferStatus = Buffercmp(TxBuffer, RxBuffer, BUFFER_SIZE);
  if (TransferStatus != SUCCESS)
  {
    while (1) /* Go to infinite loop when there is mismatch in data programming*/
    {
      STM_EVAL_LEDToggle(LED1);
      Delay((uint16_t)0xFFFF);
      Delay((uint16_t)0xFFFF);
    }
  }
  while (1)
  {
    STM_EVAL_LEDToggle(LED1);
    STM_EVAL_LEDToggle(LED2);
    STM_EVAL_LEDToggle(LED3);
    STM_EVAL_LEDToggle(LED4);
    Delay((uint16_t)0xFFFF);
    Delay((uint16_t)0xFFFF);
  }
}

/**
  * @brief  Configure system clock to run at 16Mhz
  * @param  None
  * @retval None
  */
static void CLK_Config(void)
{
    /* Initialization of the clock */
    /* Clock divider to HSI/1 */
    CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1);
}

/**
  * @brief  Configure GPIO for LEDs available on the evaluation board
  * @param  None
  * @retval None
  */
static void GPIO_Config(void)
{
    /* Initialize LEDs mounted on STM8-128 EVAL board */
    STM_EVAL_LEDInit(LED1);
    STM_EVAL_LEDInit(LED2);
    STM_EVAL_LEDInit(LED3);
    STM_EVAL_LEDInit(LED4);
   
    /* Switch LEDs On */
    STM_EVAL_LEDOff(LED1);
    STM_EVAL_LEDOff(LED2);
    STM_EVAL_LEDOff(LED3);
    STM_EVAL_LEDOff(LED4);
}

/**
  * @brief  Compares two buffers.
  * @Param  pBufferx: buffers to be compared.
  * @param  BufferLength: buffer's length
  * @retval ErrorStatus : result of the comparison
  *         - PASSED: pBuffer1 identical to pBuffer2
        *         - FAILED: pBuffer1 differs from pBuffer2
  */
ErrorStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)
{
    while (BufferLength--)
    {
        if (*pBuffer1 != *pBuffer2)
        {
            return ERROR;
        }

        pBuffer1++;
        pBuffer2++;
    }

    return SUCCESS;
}

/**
  * @brief  Delay.
  * @param  nCount
  * @retval None
  */
void Delay(uint16_t nCount)
{
  /* Decrement nCount value */
  while (nCount != 0)
  {
    nCount--;
  }
}

#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 STMicroelectronics *****END OF FILE****/