Brady Greiner / Mbed 2 deprecated DISCO-F429ZI_SDRAM_demo

use this

Dependencies:   BSP_DISCO_F429ZI SDRAM_DISCO_F429ZI mbed

main.cpp@0:d3bf1776d1c6, 2016-05-01 (annotated)

Committer:
grein028
Date:
Sun May 01 19:12:13 2016 +0000
Revision:
0:d3bf1776d1c6
Use this demo for SDRAM it works great and should work in order to store the extra data. Here is a link to the chip for address lookups; http://www.issi.com/WW/pdf/42-45S16400J.pdf

Who changed what in which revision?

UserRevisionLine numberNew contents of line
grein028 0:d3bf1776d1c6 1 #include "mbed.h"
grein028 0:d3bf1776d1c6 2 #include "SDRAM_DISCO_F429ZI.h"
grein028 0:d3bf1776d1c6 3
grein028 0:d3bf1776d1c6 4 SDRAM_DISCO_F429ZI sdram;
grein028 0:d3bf1776d1c6 5
grein028 0:d3bf1776d1c6 6 DigitalOut led_green(LED1);
grein028 0:d3bf1776d1c6 7 DigitalOut led_red(LED2);
grein028 0:d3bf1776d1c6 8
grein028 0:d3bf1776d1c6 9 Serial pc(USBTX, USBRX);
grein028 0:d3bf1776d1c6 10
grein028 0:d3bf1776d1c6 11 #define BUFFER_SIZE ((uint32_t)0x0100)
grein028 0:d3bf1776d1c6 12 #define WRITE_READ_ADDR ((uint32_t)0x0800)
grein028 0:d3bf1776d1c6 13
grein028 0:d3bf1776d1c6 14 void FillBuffer(uint32_t *pBuffer, uint32_t BufferLength, uint32_t Offset);
grein028 0:d3bf1776d1c6 15 uint8_t CompareBuffer(uint32_t* pBuffer1, uint32_t* pBuffer2, uint16_t BufferLength);
grein028 0:d3bf1776d1c6 16
grein028 0:d3bf1776d1c6 17 int main()
grein028 0:d3bf1776d1c6 18 {
grein028 0:d3bf1776d1c6 19 uint32_t WriteBuffer[BUFFER_SIZE];
grein028 0:d3bf1776d1c6 20 uint32_t ReadBuffer[BUFFER_SIZE];
grein028 0:d3bf1776d1c6 21 FMC_SDRAM_CommandTypeDef SDRAMCommandStructure;
grein028 0:d3bf1776d1c6 22
grein028 0:d3bf1776d1c6 23 pc.printf("\n\nSDRAM demo started\n");
grein028 0:d3bf1776d1c6 24 led_red = 0;
grein028 0:d3bf1776d1c6 25
grein028 0:d3bf1776d1c6 26 // Fill the write buffer
grein028 0:d3bf1776d1c6 27 FillBuffer(WriteBuffer, BUFFER_SIZE, 0xA244250F);
grein028 0:d3bf1776d1c6 28
grein028 0:d3bf1776d1c6 29 // Write buffer
grein028 0:d3bf1776d1c6 30 sdram.WriteData(SDRAM_DEVICE_ADDR + WRITE_READ_ADDR, WriteBuffer, BUFFER_SIZE);
grein028 0:d3bf1776d1c6 31 pc.printf("Write data DONE\n");
grein028 0:d3bf1776d1c6 32
grein028 0:d3bf1776d1c6 33 // Issue self-refresh command to SDRAM device
grein028 0:d3bf1776d1c6 34 SDRAMCommandStructure.CommandMode = FMC_SDRAM_CMD_SELFREFRESH_MODE;
grein028 0:d3bf1776d1c6 35 SDRAMCommandStructure.CommandTarget = FMC_SDRAM_CMD_TARGET_BANK2;
grein028 0:d3bf1776d1c6 36 SDRAMCommandStructure.AutoRefreshNumber = 1;
grein028 0:d3bf1776d1c6 37 SDRAMCommandStructure.ModeRegisterDefinition = 0;
grein028 0:d3bf1776d1c6 38 if (sdram.Sendcmd(&SDRAMCommandStructure) != HAL_OK)
grein028 0:d3bf1776d1c6 39 {
grein028 0:d3bf1776d1c6 40 led_red = 1;
grein028 0:d3bf1776d1c6 41 error("BSP_SDRAM_Sendcmd FAILED\n");
grein028 0:d3bf1776d1c6 42 }
grein028 0:d3bf1776d1c6 43
grein028 0:d3bf1776d1c6 44 // SDRAM memory read back access
grein028 0:d3bf1776d1c6 45 SDRAMCommandStructure.CommandMode = FMC_SDRAM_CMD_NORMAL_MODE;
grein028 0:d3bf1776d1c6 46 if (sdram.Sendcmd(&SDRAMCommandStructure) != HAL_OK)
grein028 0:d3bf1776d1c6 47 {
grein028 0:d3bf1776d1c6 48 led_red = 1;
grein028 0:d3bf1776d1c6 49 error("BSP_SDRAM_Sendcmd FAILED\n");
grein028 0:d3bf1776d1c6 50 }
grein028 0:d3bf1776d1c6 51
grein028 0:d3bf1776d1c6 52 while(1) {
grein028 0:d3bf1776d1c6 53
grein028 0:d3bf1776d1c6 54 // Read back data from the SDRAM memory
grein028 0:d3bf1776d1c6 55 sdram.ReadData(SDRAM_DEVICE_ADDR + WRITE_READ_ADDR, ReadBuffer, BUFFER_SIZE);
grein028 0:d3bf1776d1c6 56 pc.printf("\nRead data DONE\n");
grein028 0:d3bf1776d1c6 57
grein028 0:d3bf1776d1c6 58 // Checking data integrity
grein028 0:d3bf1776d1c6 59 if (CompareBuffer(WriteBuffer, ReadBuffer, BUFFER_SIZE) != 0)
grein028 0:d3bf1776d1c6 60 {
grein028 0:d3bf1776d1c6 61 led_red = !led_red;
grein028 0:d3bf1776d1c6 62 pc.printf("Write/Read buffers are different\n");
grein028 0:d3bf1776d1c6 63 }
grein028 0:d3bf1776d1c6 64 else
grein028 0:d3bf1776d1c6 65 {
grein028 0:d3bf1776d1c6 66 led_green = !led_green;
grein028 0:d3bf1776d1c6 67 pc.printf("Write/Read buffers are identical\n");
grein028 0:d3bf1776d1c6 68 }
grein028 0:d3bf1776d1c6 69
grein028 0:d3bf1776d1c6 70 wait(1);
grein028 0:d3bf1776d1c6 71 }
grein028 0:d3bf1776d1c6 72 }
grein028 0:d3bf1776d1c6 73
grein028 0:d3bf1776d1c6 74 /**
grein028 0:d3bf1776d1c6 75 * @brief Fills buffer with user predefined data.
grein028 0:d3bf1776d1c6 76 * @param pBuffer: pointer on the buffer to fill
grein028 0:d3bf1776d1c6 77 * @param BufferLength: size of the buffer to fill
grein028 0:d3bf1776d1c6 78 * @param Value: first value to fill on the buffer
grein028 0:d3bf1776d1c6 79 * @retval None
grein028 0:d3bf1776d1c6 80 */
grein028 0:d3bf1776d1c6 81 void FillBuffer(uint32_t *pBuffer, uint32_t BufferLength, uint32_t Value)
grein028 0:d3bf1776d1c6 82 {
grein028 0:d3bf1776d1c6 83 uint32_t tmpIndex = 0;
grein028 0:d3bf1776d1c6 84
grein028 0:d3bf1776d1c6 85 /* Put in global buffer different values */
grein028 0:d3bf1776d1c6 86 for (tmpIndex = 0; tmpIndex < BufferLength; tmpIndex++ )
grein028 0:d3bf1776d1c6 87 {
grein028 0:d3bf1776d1c6 88 pBuffer[tmpIndex] = tmpIndex + Value;
grein028 0:d3bf1776d1c6 89 }
grein028 0:d3bf1776d1c6 90 }
grein028 0:d3bf1776d1c6 91
grein028 0:d3bf1776d1c6 92 /**
grein028 0:d3bf1776d1c6 93 * @brief Compares two buffers.
grein028 0:d3bf1776d1c6 94 * @param pBuffer1, pBuffer2: buffers to be compared.
grein028 0:d3bf1776d1c6 95 * @param BufferLength: buffer's length
grein028 0:d3bf1776d1c6 96 * @retval 0: pBuffer2 identical to pBuffer1
grein028 0:d3bf1776d1c6 97 * 1: pBuffer2 differs from pBuffer1
grein028 0:d3bf1776d1c6 98 */
grein028 0:d3bf1776d1c6 99 uint8_t CompareBuffer(uint32_t* pBuffer1, uint32_t* pBuffer2, uint16_t BufferLength)
grein028 0:d3bf1776d1c6 100 {
grein028 0:d3bf1776d1c6 101 while (BufferLength--)
grein028 0:d3bf1776d1c6 102 {
grein028 0:d3bf1776d1c6 103 if (*pBuffer1 != *pBuffer2)
grein028 0:d3bf1776d1c6 104 {
grein028 0:d3bf1776d1c6 105 return 1;
grein028 0:d3bf1776d1c6 106 }
grein028 0:d3bf1776d1c6 107
grein028 0:d3bf1776d1c6 108 pBuffer1++;
grein028 0:d3bf1776d1c6 109 pBuffer2++;
grein028 0:d3bf1776d1c6 110 }
grein028 0:d3bf1776d1c6 111
grein028 0:d3bf1776d1c6 112 return 0;
grein028 0:d3bf1776d1c6 113 }