ST / Mbed 2 deprecated DISCO-F469NI_SDRAM_demo

DISCO_F469NI SDRAM basic example

Dependencies:   BSP_DISCO_F469NI SDRAM_DISCO_F469NI mbed

main.cpp@3:a98efd45bfe3, 2017-07-05 (annotated)

Committer:
jeromecoutant
Date:
Wed Jul 05 06:56:09 2017 +0000
Revision:
3:a98efd45bfe3
Parent:
0:1524912059d3 
Update with MBED rev145

Who changed what in which revision?

UserRevisionLine numberNew contents of line
adustm 0:1524912059d3 1 #include "mbed.h"
adustm 0:1524912059d3 2 #include "SDRAM_DISCO_F469NI.h"
adustm 0:1524912059d3 3
adustm 0:1524912059d3 4 SDRAM_DISCO_F469NI sdram;
adustm 0:1524912059d3 5
adustm 0:1524912059d3 6 DigitalOut led_green(LED1);
adustm 0:1524912059d3 7 DigitalOut led_red(LED2);
adustm 0:1524912059d3 8
adustm 0:1524912059d3 9 Serial pc(USBTX, USBRX);
adustm 0:1524912059d3 10
adustm 0:1524912059d3 11 #define BUFFER_SIZE ((uint32_t)0x0100)
adustm 0:1524912059d3 12 #define WRITE_READ_ADDR ((uint32_t)0x0800)
adustm 0:1524912059d3 13
adustm 0:1524912059d3 14 void FillBuffer(uint32_t *pBuffer, uint32_t BufferLength, uint32_t Offset);
adustm 0:1524912059d3 15 uint8_t CompareBuffer(uint32_t* pBuffer1, uint32_t* pBuffer2, uint16_t BufferLength);
adustm 0:1524912059d3 16
adustm 0:1524912059d3 17 int main()
adustm 0:1524912059d3 18 {
adustm 0:1524912059d3 19 uint32_t WriteBuffer[BUFFER_SIZE];
adustm 0:1524912059d3 20 uint32_t ReadBuffer[BUFFER_SIZE];
adustm 0:1524912059d3 21 FMC_SDRAM_CommandTypeDef SDRAMCommandStructure;
adustm 0:1524912059d3 22
adustm 0:1524912059d3 23 pc.printf("\n\nSDRAM demo started\n");
adustm 0:1524912059d3 24 led_red = 0;
adustm 0:1524912059d3 25
adustm 0:1524912059d3 26 // Fill the write buffer
adustm 0:1524912059d3 27 FillBuffer(WriteBuffer, BUFFER_SIZE, 0xA244250F);
adustm 0:1524912059d3 28
adustm 0:1524912059d3 29 // Write buffer
adustm 0:1524912059d3 30 sdram.WriteData(SDRAM_DEVICE_ADDR + WRITE_READ_ADDR, WriteBuffer, BUFFER_SIZE);
adustm 0:1524912059d3 31 pc.printf("Write data DONE\n");
adustm 0:1524912059d3 32
adustm 0:1524912059d3 33 // Issue self-refresh command to SDRAM device
adustm 0:1524912059d3 34 SDRAMCommandStructure.CommandMode = FMC_SDRAM_CMD_SELFREFRESH_MODE;
adustm 0:1524912059d3 35 SDRAMCommandStructure.CommandTarget = FMC_SDRAM_CMD_TARGET_BANK2;
adustm 0:1524912059d3 36 SDRAMCommandStructure.AutoRefreshNumber = 1;
adustm 0:1524912059d3 37 SDRAMCommandStructure.ModeRegisterDefinition = 0;
adustm 0:1524912059d3 38 if (sdram.Sendcmd(&SDRAMCommandStructure) != HAL_OK)
adustm 0:1524912059d3 39 {
adustm 0:1524912059d3 40 led_red = 1;
adustm 0:1524912059d3 41 error("BSP_SDRAM_Sendcmd FAILED\n");
adustm 0:1524912059d3 42 }
adustm 0:1524912059d3 43
adustm 0:1524912059d3 44 // SDRAM memory read back access
adustm 0:1524912059d3 45 SDRAMCommandStructure.CommandMode = FMC_SDRAM_CMD_NORMAL_MODE;
adustm 0:1524912059d3 46 if (sdram.Sendcmd(&SDRAMCommandStructure) != HAL_OK)
adustm 0:1524912059d3 47 {
adustm 0:1524912059d3 48 led_red = 1;
adustm 0:1524912059d3 49 error("BSP_SDRAM_Sendcmd FAILED\n");
adustm 0:1524912059d3 50 }
adustm 0:1524912059d3 51
adustm 0:1524912059d3 52 while(1) {
adustm 0:1524912059d3 53
adustm 0:1524912059d3 54 // Read back data from the SDRAM memory
adustm 0:1524912059d3 55 sdram.ReadData(SDRAM_DEVICE_ADDR + WRITE_READ_ADDR, ReadBuffer, BUFFER_SIZE);
adustm 0:1524912059d3 56 pc.printf("\nRead data DONE\n");
adustm 0:1524912059d3 57
adustm 0:1524912059d3 58 // Checking data integrity
adustm 0:1524912059d3 59 if (CompareBuffer(WriteBuffer, ReadBuffer, BUFFER_SIZE) != 0)
adustm 0:1524912059d3 60 {
adustm 0:1524912059d3 61 led_red = !led_red;
adustm 0:1524912059d3 62 pc.printf("Write/Read buffers are different\n");
adustm 0:1524912059d3 63 }
adustm 0:1524912059d3 64 else
adustm 0:1524912059d3 65 {
adustm 0:1524912059d3 66 led_green = !led_green;
adustm 0:1524912059d3 67 pc.printf("Write/Read buffers are identical\n");
adustm 0:1524912059d3 68 }
adustm 0:1524912059d3 69
adustm 0:1524912059d3 70 wait(1);
adustm 0:1524912059d3 71 }
adustm 0:1524912059d3 72 }
adustm 0:1524912059d3 73
adustm 0:1524912059d3 74 /**
adustm 0:1524912059d3 75 * @brief Fills buffer with user predefined data.
adustm 0:1524912059d3 76 * @param pBuffer: pointer on the buffer to fill
adustm 0:1524912059d3 77 * @param BufferLength: size of the buffer to fill
adustm 0:1524912059d3 78 * @param Value: first value to fill on the buffer
adustm 0:1524912059d3 79 * @retval None
adustm 0:1524912059d3 80 */
adustm 0:1524912059d3 81 void FillBuffer(uint32_t *pBuffer, uint32_t BufferLength, uint32_t Value)
adustm 0:1524912059d3 82 {
adustm 0:1524912059d3 83 uint32_t tmpIndex = 0;
adustm 0:1524912059d3 84
adustm 0:1524912059d3 85 /* Put in global buffer different values */
adustm 0:1524912059d3 86 for (tmpIndex = 0; tmpIndex < BufferLength; tmpIndex++ )
adustm 0:1524912059d3 87 {
adustm 0:1524912059d3 88 pBuffer[tmpIndex] = tmpIndex + Value;
adustm 0:1524912059d3 89 }
adustm 0:1524912059d3 90 }
adustm 0:1524912059d3 91
adustm 0:1524912059d3 92 /**
adustm 0:1524912059d3 93 * @brief Compares two buffers.
adustm 0:1524912059d3 94 * @param pBuffer1, pBuffer2: buffers to be compared.
adustm 0:1524912059d3 95 * @param BufferLength: buffer's length
adustm 0:1524912059d3 96 * @retval 0: pBuffer2 identical to pBuffer1
adustm 0:1524912059d3 97 * 1: pBuffer2 differs from pBuffer1
adustm 0:1524912059d3 98 */
adustm 0:1524912059d3 99 uint8_t CompareBuffer(uint32_t* pBuffer1, uint32_t* pBuffer2, uint16_t BufferLength)
adustm 0:1524912059d3 100 {
adustm 0:1524912059d3 101 while (BufferLength--)
adustm 0:1524912059d3 102 {
adustm 0:1524912059d3 103 if (*pBuffer1 != *pBuffer2)
adustm 0:1524912059d3 104 {
adustm 0:1524912059d3 105 return 1;
adustm 0:1524912059d3 106 }
adustm 0:1524912059d3 107
adustm 0:1524912059d3 108 pBuffer1++;
adustm 0:1524912059d3 109 pBuffer2++;
adustm 0:1524912059d3 110 }
adustm 0:1524912059d3 111
adustm 0:1524912059d3 112 return 0;
adustm 0:1524912059d3 113 }
adustm 0:1524912059d3 114