Diff: main.cpp

Revision:

0:c18d9a07a0d8

Child:

2:0cfdd4157b1e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Apr 11 15:31:14 2017 +0000
@@ -0,0 +1,102 @@
+#include "mbed.h"
+#include "stm32f769i_discovery.h"
+#include "stm32f769i_discovery_lcd.h"
+#include "stm32f769i_discovery_sdram.h"
+
+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);
+
+#define BUFFER_SIZE            ((uint32_t)0x0100)
+#define WRITE_READ_ADDR        ((uint32_t)0x0800)
+#define SDRAM_WRITE_READ_ADDR  ((uint32_t)0xC0177000)
+
+uint32_t sdram_aTxBuffer[BUFFER_SIZE];
+uint32_t sdram_aRxBuffer[BUFFER_SIZE];
+
+int main()
+{
+    printf("\n\n SDRAM EXAMPLE FOR DISCO-F769NI START:\n");
+
+    /* Init LCD and display example information */
+    BSP_LCD_Init();
+    BSP_LCD_LayerDefaultInit(0, LCD_FB_START_ADDRESS);
+    BSP_LCD_Clear(LCD_COLOR_WHITE);
+    BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
+    BSP_LCD_FillRect(0, 0, BSP_LCD_GetXSize(), 40);
+    BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
+    BSP_LCD_SetBackColor(LCD_COLOR_BLUE);
+    BSP_LCD_SetFont(&Font24);
+    BSP_LCD_DisplayStringAt(0, 0, (uint8_t *)"SDRAM basic example", CENTER_MODE);
+
+    /* SDRAM device configuration */
+    if(BSP_SDRAM_Init() != SDRAM_OK) {
+        BSP_LCD_DisplayStringAt(20, 100, (uint8_t *)"SDRAM Initialization : FAILED", LEFT_MODE);
+    } else {
+        BSP_LCD_DisplayStringAt(20, 100, (uint8_t *)"SDRAM Initialization : OK", LEFT_MODE);
+    }
+    /* Fill the buffer to write */
+    Fill_Buffer(sdram_aTxBuffer, BUFFER_SIZE, 0xA244250F);
+
+    /* Write data to the SDRAM memory */
+    if(BSP_SDRAM_WriteData(SDRAM_WRITE_READ_ADDR + WRITE_READ_ADDR, sdram_aTxBuffer, BUFFER_SIZE) != SDRAM_OK) {
+        BSP_LCD_DisplayStringAt(20, 130, (uint8_t *)"SDRAM WRITE : FAILED", LEFT_MODE);
+    } else {
+        BSP_LCD_DisplayStringAt(20, 130, (uint8_t *)"SDRAM WRITE : OK", LEFT_MODE);
+    }
+
+    /* Read back data from the SDRAM memory */
+    if(BSP_SDRAM_ReadData(SDRAM_WRITE_READ_ADDR + WRITE_READ_ADDR, sdram_aRxBuffer, BUFFER_SIZE) != SDRAM_OK) {
+        BSP_LCD_DisplayStringAt(20, 160, (uint8_t *)"SDRAM READ : FAILED", LEFT_MODE);
+    } else {
+        BSP_LCD_DisplayStringAt(20, 160, (uint8_t *)"SDRAM READ  : OK", LEFT_MODE);
+    }
+
+    if(Buffercmp(sdram_aTxBuffer, sdram_aRxBuffer, BUFFER_SIZE) > 0) {
+        BSP_LCD_DisplayStringAt(20, 190, (uint8_t *)"SDRAM COMPARE : FAILED", LEFT_MODE);
+    } else {
+        BSP_LCD_DisplayStringAt(20, 190, (uint8_t *)"SDRAM Test  : OK", LEFT_MODE);
+    }
+
+    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 uwBufferLenght, uint32_t uwOffset)
+{
+    uint32_t tmpIndex = 0;
+
+    /* Put in global buffer different values */
+    for (tmpIndex = 0; tmpIndex < uwBufferLenght; 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;
+}