SD card use for DISCO_F469NI basic example
Dependencies: BSP_DISCO_F469NI SD_DISCO_F469NI mbed
main.cpp
- Committer:
- Jerome Coutant
- Date:
- 2017-05-17
- Revision:
- 2:fdce3ea5ef35
- Parent:
- 0:354f8b7c3755
File content as of revision 2:fdce3ea5ef35:
#include "mbed.h" #include "SD_DISCO_F469NI.h" SD_DISCO_F469NI sd; DigitalOut led_green(LED1); DigitalOut led_red(LED2); Serial pc(USBTX, USBRX); #define BLOCK_START_ADDR 0 /* Block start address */ #define NUM_OF_BLOCKS 5 /* Total number of blocks */ #define BUFFER_WORDS_SIZE ((512 * NUM_OF_BLOCKS) >> 2) /* Total data size in bytes */ uint32_t aTxBuffer[BUFFER_WORDS_SIZE]; uint32_t aRxBuffer[BUFFER_WORDS_SIZE]; /* Private function prototypes -----------------------------------------------*/ void SD_main_test(void); void SD_Detection(void); static void Fill_Buffer(uint32_t *pBuffer, uint32_t uwBufferLenght, uint32_t uwOffset); static uint8_t Buffercmp(uint32_t* pBuffer1, uint32_t* pBuffer2, uint16_t BufferLength); int main() { uint8_t SD_state = MSD_OK; pc.printf("SD\n"); pc.printf("This example shows how to write\n"); pc.printf("and read data on the microSD and also\n"); pc.printf("how to detect the presence of the card\n"); led_red = 0; SD_state = sd.Init(); if(SD_state != MSD_OK){ if(SD_state == MSD_ERROR_SD_NOT_PRESENT){ pc.printf("SD shall be inserted before running test\n"); } else { pc.printf("SD Initialization : FAIL.\n"); } pc.printf("SD Test Aborted.\n"); } else { pc.printf("SD Initialization : OK.\n"); if(sd.Erase(BLOCK_START_ADDR, (512 * NUM_OF_BLOCKS)) != MSD_OK){ pc.printf("SD ERASE : FAILED.\n"); pc.printf("SD Test Aborted.\n"); } else { pc.printf("SD ERASE : OK.\n"); /* Fill the buffer to write */ Fill_Buffer(aTxBuffer, BUFFER_WORDS_SIZE, 0x22FF); if(sd.WriteBlocks(aTxBuffer, BLOCK_START_ADDR, NUM_OF_BLOCKS, SD_DATATIMEOUT) != MSD_OK){ pc.printf("SD WRITE : FAILED.\n"); pc.printf("SD Test Aborted.\n"); } else { pc.printf("SD WRITE : OK.\n"); if(sd.ReadBlocks(aRxBuffer, BLOCK_START_ADDR, NUM_OF_BLOCKS, SD_DATATIMEOUT)!= MSD_OK){ pc.printf("SD READ : FAILED.\n"); pc.printf("SD Test Aborted.\n"); } else { pc.printf("SD READ : OK.\n"); if(Buffercmp(aTxBuffer, aRxBuffer, BUFFER_WORDS_SIZE) > 0){ pc.printf("SD COMPARE : FAILED.\n"); pc.printf("SD Test Aborted.\n"); } else { pc.printf("SD Test : OK.\n"); pc.printf("SD can be removed.\n"); } } } } } while (1) { } } /** * @brief Fills buffer with user predefined data. * @param pBuffer: pointer on the buffer to fill * @param uwBufferLenght: size of the buffer to fill * @param uwOffset: first value to fill on the buffer * @retval None */ static void Fill_Buffer(uint32_t *pBuffer, uint32_t uwBufferLength, uint32_t uwOffset) { uint32_t tmpIndex = 0; /* Put in global buffer different values */ for (tmpIndex = 0; tmpIndex < uwBufferLength; tmpIndex++ ) { pBuffer[tmpIndex] = tmpIndex + uwOffset; } } /** * @brief Compares two buffers. * @param pBuffer1, pBuffer2: buffers to be compared. * @param BufferLength: buffer's length * @retval 1: pBuffer identical to pBuffer1 * 0: pBuffer differs from pBuffer1 */ static uint8_t Buffercmp(uint32_t* pBuffer1, uint32_t* pBuffer2, uint16_t BufferLength) { while (BufferLength--) { if (*pBuffer1 != *pBuffer2) { return 1; } pBuffer1++; pBuffer2++; } return 0; }