F7 discovery TFT shwo SD-card example added

STM32/libraries/BoardExamples/examples/Discovery746NG/TFT/SdCardDirectory/SdCardDirectory.ino

@@ -0,0 +1,73 @@
+/************************************************************************
+
+  STM32F746 Discovery show SD-card directory on TFT
+
+  Required libraries: GFX, Adafruit 
+
+  Installation Instructions:
+  1. Import the Adadruit library in the menue
+  Sketch=>Include Libraries=>Manage Libraries =>  Adafruit ILI9341   
+  2. Import the Adadruit GFX-Library
+  Sketch=>Include Libraries=>Manage Libraries =>  Adafruit GFX Library  
+
+  This code is mainly derived fron the "OpenNext" example from the
+  SdFat examples.
+
+  June 2017, ChrisMicro
+
+************************************************************************/
+
+#include "SdFat.h"
+#include "LTDC_F746_Discovery.h"
+
+SdFatSdio sd;
+SdFile file;
+LTDC_F746_Discovery tft;
+
+void setup()
+{
+  // The buffer is memory mapped
+  // You can directly draw on the display by writing to the buffer
+  uint16_t *buffer = (uint16_t *)malloc(LTDC_F746_ROKOTECH.width * LTDC_F746_ROKOTECH.height);
+
+  tft.begin((uint16_t *)buffer);
+  tft.fillScreen(LTDC_BLACK);
+  //tft.setRotation(0); 
+  tft.setCursor(0, 0);
+  tft.setTextColor(LTDC_GREEN);  tft.setTextSize(2);
+  tft.println("STM32F746 Discovery SD-card directory");
+  tft.setTextColor(LTDC_YELLOW); tft.setTextSize(1);
+  
+  if (!sd.begin()) 
+  {
+    tft.setTextColor(LTDC_RED); tft.print("error SD-card not detected");
+    sd.initErrorHalt();
+  }
+
+  // Open next file in root.  The volume working directory, vwd, is root.
+  // Warning, openNext starts at the current position of sd.vwd() so a
+  // rewind may be neccessary in your application.
+  sd.vwd()->rewind();
+  while (file.openNext(sd.vwd(), O_READ)) 
+  {
+    file.printFileSize(&tft);
+    tft.write(' ');
+    file.printModifyDateTime(&tft);
+    tft.write(' ');
+    file.printName(&tft);
+    if (file.isDir()) 
+    {
+      // Indicate a directory.
+      tft.write('/');
+    }
+    tft.println();
+    delay(1000);
+    file.close();
+  }
+  tft.setTextColor(LTDC_BLUE);
+  tft.println("Done!");
+}
+
+void loop()
+{
+}