ST / Mbed OS DISCO-F746NG_SDRAM_demo

SDRAM for DISCO_F746NG basic example

Dependencies:   BSP_DISCO_F746NG

main.cpp@3:2bd1b98de6ec, 2019-11-20 (annotated)

Committer:
Jerome Coutant
Date:
Wed Nov 20 13:27:16 2019 +0100
Revision:
3:2bd1b98de6ec
Parent:
0:e674bc8aa29d 
Update with STM32Cube_FW_F7_V1.15.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
adustm 0:e674bc8aa29d 1 #include "mbed.h"
Jerome Coutant 3:2bd1b98de6ec 2 #include "stm32746g_discovery_sdram.h"
adustm 0:e674bc8aa29d 3
adustm 0:e674bc8aa29d 4 #define BUFFER_SIZE ((uint32_t)0x0100)
adustm 0:e674bc8aa29d 5 #define WRITE_READ_ADDR ((uint32_t)0x0800)
Jerome Coutant 3:2bd1b98de6ec 6
adustm 0:e674bc8aa29d 7 void FillBuffer(uint32_t *pBuffer, uint32_t BufferLength, uint32_t Offset);
Jerome Coutant 3:2bd1b98de6ec 8 uint8_t CompareBuffer(uint32_t *pBuffer1, uint32_t *pBuffer2, uint16_t BufferLength);
Jerome Coutant 3:2bd1b98de6ec 9
adustm 0:e674bc8aa29d 10 int main()
adustm 0:e674bc8aa29d 11 {
adustm 0:e674bc8aa29d 12 uint32_t WriteBuffer[BUFFER_SIZE];
adustm 0:e674bc8aa29d 13 uint32_t ReadBuffer[BUFFER_SIZE];
adustm 0:e674bc8aa29d 14 FMC_SDRAM_CommandTypeDef SDRAMCommandStructure;
Jerome Coutant 3:2bd1b98de6ec 15
Jerome Coutant 3:2bd1b98de6ec 16 printf("\n\nSDRAM demo started\n");
Jerome Coutant 3:2bd1b98de6ec 17
Jerome Coutant 3:2bd1b98de6ec 18 BSP_SDRAM_Init();
Jerome Coutant 3:2bd1b98de6ec 19
adustm 0:e674bc8aa29d 20 // Fill the write buffer
adustm 0:e674bc8aa29d 21 FillBuffer(WriteBuffer, BUFFER_SIZE, 0xA244250F);
Jerome Coutant 3:2bd1b98de6ec 22
adustm 0:e674bc8aa29d 23 // Write buffer
Jerome Coutant 3:2bd1b98de6ec 24 BSP_SDRAM_WriteData(SDRAM_DEVICE_ADDR + WRITE_READ_ADDR, WriteBuffer, BUFFER_SIZE);
Jerome Coutant 3:2bd1b98de6ec 25 printf("Write data DONE\n");
Jerome Coutant 3:2bd1b98de6ec 26
adustm 0:e674bc8aa29d 27 // Issue self-refresh command to SDRAM device
adustm 0:e674bc8aa29d 28 SDRAMCommandStructure.CommandMode = FMC_SDRAM_CMD_SELFREFRESH_MODE;
adustm 0:e674bc8aa29d 29 SDRAMCommandStructure.CommandTarget = FMC_SDRAM_CMD_TARGET_BANK2;
adustm 0:e674bc8aa29d 30 SDRAMCommandStructure.AutoRefreshNumber = 1;
adustm 0:e674bc8aa29d 31 SDRAMCommandStructure.ModeRegisterDefinition = 0;
Jerome Coutant 3:2bd1b98de6ec 32 if (BSP_SDRAM_Sendcmd(&SDRAMCommandStructure) != HAL_OK) {
Jerome Coutant 3:2bd1b98de6ec 33 error("BSP_SDRAM_Sendcmd FAILED\n");
adustm 0:e674bc8aa29d 34 }
Jerome Coutant 3:2bd1b98de6ec 35
adustm 0:e674bc8aa29d 36 // SDRAM memory read back access
adustm 0:e674bc8aa29d 37 SDRAMCommandStructure.CommandMode = FMC_SDRAM_CMD_NORMAL_MODE;
Jerome Coutant 3:2bd1b98de6ec 38 if (BSP_SDRAM_Sendcmd(&SDRAMCommandStructure) != HAL_OK) {
Jerome Coutant 3:2bd1b98de6ec 39 error("BSP_SDRAM_Sendcmd FAILED\n");
adustm 0:e674bc8aa29d 40 }
Jerome Coutant 3:2bd1b98de6ec 41
Jerome Coutant 3:2bd1b98de6ec 42 // Read back data from the SDRAM memory
Jerome Coutant 3:2bd1b98de6ec 43 BSP_SDRAM_ReadData(SDRAM_DEVICE_ADDR + WRITE_READ_ADDR, ReadBuffer, BUFFER_SIZE);
Jerome Coutant 3:2bd1b98de6ec 44 printf("Read data DONE\n");
Jerome Coutant 3:2bd1b98de6ec 45
Jerome Coutant 3:2bd1b98de6ec 46 // Checking data integrity
Jerome Coutant 3:2bd1b98de6ec 47 if (CompareBuffer(WriteBuffer, ReadBuffer, BUFFER_SIZE) != 0) {
Jerome Coutant 3:2bd1b98de6ec 48 printf("Write/Read buffers are different\n");
Jerome Coutant 3:2bd1b98de6ec 49 } else {
Jerome Coutant 3:2bd1b98de6ec 50 printf("Write/Read buffers are identical\n");
adustm 0:e674bc8aa29d 51 }
adustm 0:e674bc8aa29d 52 }
Jerome Coutant 3:2bd1b98de6ec 53
adustm 0:e674bc8aa29d 54 /**
adustm 0:e674bc8aa29d 55 * @brief Fills buffer with user predefined data.
adustm 0:e674bc8aa29d 56 * @param pBuffer: pointer on the buffer to fill
adustm 0:e674bc8aa29d 57 * @param BufferLength: size of the buffer to fill
adustm 0:e674bc8aa29d 58 * @param Value: first value to fill on the buffer
adustm 0:e674bc8aa29d 59 * @retval None
adustm 0:e674bc8aa29d 60 */
adustm 0:e674bc8aa29d 61 void FillBuffer(uint32_t *pBuffer, uint32_t BufferLength, uint32_t Value)
adustm 0:e674bc8aa29d 62 {
Jerome Coutant 3:2bd1b98de6ec 63 uint32_t tmpIndex = 0;
Jerome Coutant 3:2bd1b98de6ec 64
Jerome Coutant 3:2bd1b98de6ec 65 /* Put in global buffer different values */
Jerome Coutant 3:2bd1b98de6ec 66 for (tmpIndex = 0; tmpIndex < BufferLength; tmpIndex++) {
Jerome Coutant 3:2bd1b98de6ec 67 pBuffer[tmpIndex] = tmpIndex + Value;
Jerome Coutant 3:2bd1b98de6ec 68 }
Jerome Coutant 3:2bd1b98de6ec 69 }
Jerome Coutant 3:2bd1b98de6ec 70
adustm 0:e674bc8aa29d 71 /**
adustm 0:e674bc8aa29d 72 * @brief Compares two buffers.
adustm 0:e674bc8aa29d 73 * @param pBuffer1, pBuffer2: buffers to be compared.
adustm 0:e674bc8aa29d 74 * @param BufferLength: buffer's length
adustm 0:e674bc8aa29d 75 * @retval 0: pBuffer2 identical to pBuffer1
adustm 0:e674bc8aa29d 76 * 1: pBuffer2 differs from pBuffer1
adustm 0:e674bc8aa29d 77 */
Jerome Coutant 3:2bd1b98de6ec 78 uint8_t CompareBuffer(uint32_t *pBuffer1, uint32_t *pBuffer2, uint16_t BufferLength)
adustm 0:e674bc8aa29d 79 {
Jerome Coutant 3:2bd1b98de6ec 80 while (BufferLength--) {
Jerome Coutant 3:2bd1b98de6ec 81 if (*pBuffer1 != *pBuffer2) {
Jerome Coutant 3:2bd1b98de6ec 82 return 1;
Jerome Coutant 3:2bd1b98de6ec 83 }
Jerome Coutant 3:2bd1b98de6ec 84
Jerome Coutant 3:2bd1b98de6ec 85 pBuffer1++;
Jerome Coutant 3:2bd1b98de6ec 86 pBuffer2++;
adustm 0:e674bc8aa29d 87 }
Jerome Coutant 3:2bd1b98de6ec 88
Jerome Coutant 3:2bd1b98de6ec 89 return 0;
adustm 0:e674bc8aa29d 90 }