main.cpp

00001 #include "mbed.h"
00002 #include "stm32f769i_discovery_lcd.h"
00003 #include "stm32f769i_discovery_sdram.h"
00004 
00005 static void Fill_Buffer(uint32_t *pBuffer, uint32_t uwBufferLenght, uint32_t uwOffset);
00006 static uint8_t Buffercmp(uint32_t *pBuffer1, uint32_t *pBuffer2, uint16_t BufferLength);
00007 
00008 #define BUFFER_SIZE            ((uint32_t)0x0100)
00009 #define WRITE_READ_ADDR        ((uint32_t)0x0800)
00010 #define SDRAM_WRITE_READ_ADDR  ((uint32_t)0xC0177000)
00011 
00012 uint32_t sdram_aTxBuffer[BUFFER_SIZE];
00013 uint32_t sdram_aRxBuffer[BUFFER_SIZE];
00014 
00015 int main()
00016 {
00017     printf("\n\n SDRAM EXAMPLE FOR DISCO-F769NI START:\n");
00018 
00019     /* Init LCD and display example information */
00020     BSP_LCD_Init();
00021     BSP_LCD_LayerDefaultInit(0, LCD_FB_START_ADDRESS);
00022     BSP_LCD_Clear(LCD_COLOR_WHITE);
00023     BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
00024     BSP_LCD_FillRect(0, 0, BSP_LCD_GetXSize(), 40);
00025     BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
00026     BSP_LCD_SetBackColor(LCD_COLOR_BLUE);
00027     BSP_LCD_SetFont(&Font24);
00028     BSP_LCD_DisplayStringAt(0, 0, (uint8_t *)"SDRAM basic example", CENTER_MODE);
00029 
00030     HAL_Delay(2000);
00031 
00032     /* SDRAM device configuration */
00033     if (BSP_SDRAM_Init() != SDRAM_OK) {
00034         BSP_LCD_DisplayStringAt(20, 100, (uint8_t *)"SDRAM Initialization : FAILED", LEFT_MODE);
00035     } else {
00036         BSP_LCD_DisplayStringAt(20, 100, (uint8_t *)"SDRAM Initialization : OK", LEFT_MODE);
00037     }
00038     /* Fill the buffer to write */
00039     Fill_Buffer(sdram_aTxBuffer, BUFFER_SIZE, 0xA244250F);
00040 
00041     HAL_Delay(2000);
00042 
00043     /* Write data to the SDRAM memory */
00044     if (BSP_SDRAM_WriteData(SDRAM_WRITE_READ_ADDR + WRITE_READ_ADDR, sdram_aTxBuffer, BUFFER_SIZE) != SDRAM_OK) {
00045         BSP_LCD_DisplayStringAt(20, 130, (uint8_t *)"SDRAM WRITE : FAILED", LEFT_MODE);
00046     } else {
00047         BSP_LCD_DisplayStringAt(20, 130, (uint8_t *)"SDRAM WRITE : OK", LEFT_MODE);
00048     }
00049 
00050     HAL_Delay(2000);
00051 
00052     /* Read back data from the SDRAM memory */
00053     if (BSP_SDRAM_ReadData(SDRAM_WRITE_READ_ADDR + WRITE_READ_ADDR, sdram_aRxBuffer, BUFFER_SIZE) != SDRAM_OK) {
00054         BSP_LCD_DisplayStringAt(20, 160, (uint8_t *)"SDRAM READ : FAILED", LEFT_MODE);
00055     } else {
00056         BSP_LCD_DisplayStringAt(20, 160, (uint8_t *)"SDRAM READ  : OK", LEFT_MODE);
00057     }
00058 
00059     HAL_Delay(2000);
00060 
00061     if (Buffercmp(sdram_aTxBuffer, sdram_aRxBuffer, BUFFER_SIZE) > 0) {
00062         BSP_LCD_DisplayStringAt(20, 190, (uint8_t *)"SDRAM COMPARE : FAILED", LEFT_MODE);
00063     } else {
00064         BSP_LCD_DisplayStringAt(20, 190, (uint8_t *)"SDRAM Test  : OK", LEFT_MODE);
00065     }
00066 
00067     while (1) {
00068 
00069     }
00070 }
00071 
00072 
00073 /**
00074   * @brief  Fills buffer with user predefined data.
00075   * @param  pBuffer: pointer on the buffer to fill
00076   * @param  uwBufferLenght: size of the buffer to fill
00077   * @param  uwOffset: first value to fill on the buffer
00078   * @retval None
00079   */
00080 static void Fill_Buffer(uint32_t *pBuffer, uint32_t uwBufferLenght, uint32_t uwOffset)
00081 {
00082     uint32_t tmpIndex = 0;
00083 
00084     /* Put in global buffer different values */
00085     for (tmpIndex = 0; tmpIndex < uwBufferLenght; tmpIndex++) {
00086         pBuffer[tmpIndex] = tmpIndex + uwOffset;
00087     }
00088 }
00089 
00090 /**
00091   * @brief  Compares two buffers.
00092   * @param  pBuffer1, pBuffer2: buffers to be compared.
00093   * @param  BufferLength: buffer's length
00094   * @retval 1: pBuffer identical to pBuffer1
00095   *         0: pBuffer differs from pBuffer1
00096   */
00097 static uint8_t Buffercmp(uint32_t *pBuffer1, uint32_t *pBuffer2, uint16_t BufferLength)
00098 {
00099     while (BufferLength--) {
00100         if (*pBuffer1 != *pBuffer2) {
00101             return 1;
00102         }
00103 
00104         pBuffer1++;
00105         pBuffer2++;
00106     }
00107 
00108     return 0;
00109 }