Huseyin Buyukesmeli / Mbed 2 deprecated DISCO-F746NG_uSD

F746NG fatfs and micro sd example

Dependencies:   BSP_DISCO_F746NG FatFS mbed

This is a quick and dirty example about how to use micro sd card module with FatFs on STM32746G Discovery board. I simply use the FatFs library downloaded with DFP for STM32F7. The project shows how to read PPM image file from sd card, display on LCD and writing image to sd card.

Files at this revision

API Documentation at this revision

Revision 0:020195991898, committed 2018-02-03

Comitter:
buyukesmeli
Date:
Sat Feb 03 14:39:39 2018 +0000
Child:
1:28e2f24b11b3
Commit message:
Initial Commit

Changed in this revision

BSP_DISCO_F746NG.lib Show annotated file Show diff for this revision Revisions of this file
FatFS.lib Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file
mbed.bld Show annotated file Show diff for this revision Revisions of this file 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BSP_DISCO_F746NG.lib	Sat Feb 03 14:39:39 2018 +0000
@@ -0,0 +1,1 @@
+https://developer.mbed.org/teams/ST/code/BSP_DISCO_F746NG/#df2ea349c37a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/FatFS.lib	Sat Feb 03 14:39:39 2018 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/users/buyukesmeli/code/FatFS/#3a2f06aeceaf

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Feb 03 14:39:39 2018 +0000
@@ -0,0 +1,200 @@
+#include "mbed.h"
+#define USE_STM32746G_DISCOVERY
+#include "stm32f7xx_hal.h"
+#include "stm32746g_discovery.h"
+#include "stm32746g_discovery_sd.h"
+#include "string.h"
+#include "stm32746g_discovery_lcd.h"
+#include "ff_gen_drv.h"
+#include "sd_diskio.h"
+
+#define FRAME_BUFFER    0xC0000000
+#define SD_IN_BUFFER    0xC0140000
+#define SD_OUT_BUFFER   0xC0280000
+
+FATFS SDFatFs;  
+FIL MyFile;  
+
+
+ 
+
+static void LCD_LL_ConvertFrameToARGB8888(void *pSrc, void *pDst);
+static void LCD_LL_ConvertFrameToRGB888(void *pSrc, void *pDst);
+extern SD_HandleTypeDef uSdHandle;
+DMA2D_HandleTypeDef hdma2d_disco;
+
+Serial pc(USBTX, USBRX);
+uint32_t i = 0, image_width = 0, image_height = 0;
+const char image_header[] = "P6\n# Generated by STM32\n272 480\n255\n";
+
+char SDPath[4];
+char text [40];
+char c;
+
+int main(void)
+{
+    FRESULT res;
+    uint32_t  bytesread;
+    uint32_t line_cnt=0;
+    pc.baud(115200);
+
+    BSP_LCD_Init();
+    BSP_LCD_DisplayOff();
+    BSP_LCD_LayerDefaultInit(0, FRAME_BUFFER);
+    BSP_LCD_SelectLayer(0);
+    BSP_LCD_DisplayOn();
+
+    FATFS_LinkDriver(&SD_Driver, SDPath);
+    
+    res = f_mount(&SDFatFs, (TCHAR const*)SDPath, 0);
+    if(res!= FR_OK)
+        pc.printf("Failed to mount SD\n");
+        
+    res = f_open(&MyFile, "image.ppm",  FA_READ);
+    if(res!= FR_OK)
+        pc.printf("Failed to open file\n");
+        
+    while(1) {
+        
+        res = f_read(&MyFile, &c, 1, (UINT*)&bytesread);
+        if (c!='#')
+            line_cnt++;
+        if(line_cnt==2) {
+            text[0] = c;
+            res = f_read(&MyFile, &c, 1, (UINT*)&bytesread);
+            i = 1;
+            while(c!=' ') {
+                text[i]=c;
+                res = f_read(&MyFile, &c, 1, (UINT*)&bytesread);
+                i++;
+            }
+            text[i]=0;
+            image_width = atoi(text);
+            res = f_read(&MyFile, &c, 1, (UINT*)&bytesread);
+            i = 0;
+            while(c!='\n') {
+                text[i]=c;
+                res = f_read(&MyFile, &c, 1, (UINT*)&bytesread);
+                i++;
+            }
+            text[i]=0;
+            image_height = atoi(text);
+        } else {
+            while(c!='\n')
+                res = f_read(&MyFile, &c, 1, (UINT*)&bytesread);
+        }
+        if(line_cnt == 3)
+            break;
+
+    }
+    pc.printf("w = %d \n",image_width);
+    pc.printf("h = %d \n",image_height);
+    
+    if(image_width != 480 || image_height != 272)
+        pc.printf("Image size should be 272x480");
+    
+    for(i = 0; i < image_width*image_width*3; i = i + 512) {
+        res = f_read(&MyFile, (void *)(SD_IN_BUFFER+i) , 512, (UINT*)&bytesread);
+    }
+    f_close(&MyFile);
+    
+    LCD_LL_ConvertFrameToARGB8888((uint32_t *)(SD_IN_BUFFER), (uint32_t *)(FRAME_BUFFER));
+    
+
+    LCD_LL_ConvertFrameToRGB888((uint32_t *)(FRAME_BUFFER), (uint32_t *)(SD_OUT_BUFFER));
+    
+    res = f_open(&MyFile, "image_ou.ppm",   FA_CREATE_ALWAYS | FA_WRITE);
+    if(res!= FR_OK)
+        pc.printf("Failed to open file\n");
+
+
+    res = f_write(&MyFile, image_header, 15, &bytesread);
+    if(res!= FR_OK)
+        pc.printf("Failed to write file 1\n");
+        
+    for(i = 0; i < 480*272*3; i = i + 512) {
+        res = f_write(&MyFile, (uint8_t *)(SD_OUT_BUFFER+i), 512, &bytesread);
+        if(res!= FR_OK)
+            pc.printf("Failed to write file\n");
+    }
+    f_close(&MyFile);
+    FATFS_UnLinkDriver(SDPath);
+
+    while (1) {
+    }
+}
+extern "C" {
+    void BSP_SDMMC_IRQHandler(void)
+    {
+        HAL_SD_IRQHandler(&uSdHandle);
+    }
+    void BSP_SDMMC_DMA_Tx_IRQHandler(void)
+    {
+        HAL_DMA_IRQHandler(uSdHandle.hdmatx);
+    }
+    void BSP_SDMMC_DMA_Rx_IRQHandler(void)
+    {
+        HAL_DMA_IRQHandler(uSdHandle.hdmarx);
+    }
+    static void LCD_LL_ConvertFrameToARGB8888(void *pSrc, void *pDst)
+    {
+        /* Enable DMA2D clock */
+        __HAL_RCC_DMA2D_CLK_ENABLE();
+
+        /* Configure the DMA2D Mode, Color Mode and output offset */
+        hdma2d_disco.Init.Mode         = DMA2D_M2M_PFC;
+        hdma2d_disco.Init.ColorMode    = DMA2D_ARGB8888;
+        hdma2d_disco.Init.OutputOffset = 0;
+
+        /* Foreground Configuration */
+        hdma2d_disco.LayerCfg[1].AlphaMode = DMA2D_NO_MODIF_ALPHA;
+        hdma2d_disco.LayerCfg[1].InputAlpha = 0xFF;
+        hdma2d_disco.LayerCfg[1].InputColorMode = CM_RGB888;
+        hdma2d_disco.LayerCfg[1].InputOffset = 0;
+
+        hdma2d_disco.Instance = DMA2D;
+
+        /* DMA2D Initialization */
+        if(HAL_DMA2D_Init(&hdma2d_disco) == HAL_OK) {
+            if(HAL_DMA2D_ConfigLayer(&hdma2d_disco, 1) == HAL_OK) {
+                if (HAL_DMA2D_Start(&hdma2d_disco, (uint32_t)pSrc, (uint32_t)pDst, 480, 272) == HAL_OK) {
+                    /* Polling For DMA transfer */
+                    HAL_DMA2D_PollForTransfer(&hdma2d_disco, 10);
+                }
+            }
+        } else {
+
+        }
+    }
+    static void LCD_LL_ConvertFrameToRGB888(void *pSrc, void *pDst)
+    {
+        /* Enable DMA2D clock */
+        __HAL_RCC_DMA2D_CLK_ENABLE();
+
+        /* Configure the DMA2D Mode, Color Mode and output offset */
+        hdma2d_disco.Init.Mode         = DMA2D_M2M_PFC;
+        hdma2d_disco.Init.ColorMode    = DMA2D_RGB888;
+        hdma2d_disco.Init.OutputOffset = 0;
+
+        /* Foreground Configuration */
+        hdma2d_disco.LayerCfg[1].AlphaMode = DMA2D_NO_MODIF_ALPHA;
+        hdma2d_disco.LayerCfg[1].InputAlpha = 0xFF;
+        hdma2d_disco.LayerCfg[1].InputColorMode = CM_ARGB8888;
+        hdma2d_disco.LayerCfg[1].InputOffset = 0;
+
+        hdma2d_disco.Instance = DMA2D;
+
+        /* DMA2D Initialization */
+        if(HAL_DMA2D_Init(&hdma2d_disco) == HAL_OK) {
+            if(HAL_DMA2D_ConfigLayer(&hdma2d_disco, 1) == HAL_OK) {
+                if (HAL_DMA2D_Start(&hdma2d_disco, (uint32_t)pSrc, (uint32_t)pDst, 480, 272) == HAL_OK) {
+                    /* Polling For DMA transfer */
+                    HAL_DMA2D_PollForTransfer(&hdma2d_disco, 10);
+                }
+            }
+        } else {
+
+        }
+    }
+
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Sat Feb 03 14:39:39 2018 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/users/mbed_official/code/mbed/builds/7130f322cb7e
\ No newline at end of file