Olle Sköld / Mbed 2 deprecated DISCO-F746NG_BMP_FROM_SDCARD

This demo reads a bitmap from a FAT formatted SD-card, copies it to flash and displays it on the screen. The demo is based on the following project: https://os.mbed.com/users/DieterGraef/code/DISCO-F746NG_SDFileSystem/

Dependencies:   LCD_DISCO_F746NG TS_DISCO_F746NG mbed FATFileSystem

Fork of DISCO-F746NG_SDFileSystem by Dieter Graef

main.cpp@4:95e30a911d97, 2018-04-19 (annotated)

Committer:
Lightsource
Date:
Thu Apr 19 19:59:54 2018 +0000
Revision:
4:95e30a911d97
Parent:
1:7f463f6f904e 
Demo that reads a bitmap from SD-card, copies it to flash and displays it on the screen.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
DieterGraef 0:134f7a094930 1 #include "mbed.h"
DieterGraef 0:134f7a094930 2 #include "SDFileSystem.h"
Lightsource 4:95e30a911d97 3 #include "LCD_DISCO_F746NG.h"
Lightsource 4:95e30a911d97 4 #include "TS_DISCO_F746NG.h"
DieterGraef 0:134f7a094930 5 #include <stdio.h>
Lightsource 4:95e30a911d97 6 #include <stdlib.h>
Lightsource 4:95e30a911d97 7 #include <string>
DieterGraef 0:134f7a094930 8
Lightsource 4:95e30a911d97 9 void drawImage(char * name, uint16_t x, uint16_t y);
Lightsource 4:95e30a911d97 10
Lightsource 4:95e30a911d97 11 LCD_DISCO_F746NG lcd;
DieterGraef 0:134f7a094930 12 DigitalOut myled(LED1);
DieterGraef 0:134f7a094930 13 SDFileSystem sd("sd");
Lightsource 4:95e30a911d97 14 TS_DISCO_F746NG ts;
DieterGraef 0:134f7a094930 15
Lightsource 4:95e30a911d97 16 int main() {
Lightsource 4:95e30a911d97 17 uint8_t TS_Status;
Lightsource 4:95e30a911d97 18
Lightsource 4:95e30a911d97 19 lcd.SetBackColor(LCD_COLOR_BLACK);
Lightsource 4:95e30a911d97 20
Lightsource 4:95e30a911d97 21 // In this example, the TS is initialized but not used.
DieterGraef 0:134f7a094930 22
Lightsource 4:95e30a911d97 23 TS_Status = ts.Init(lcd.GetXSize(), lcd.GetYSize());
Lightsource 4:95e30a911d97 24 if (TS_Status != TS_OK) {
Lightsource 4:95e30a911d97 25 lcd.Clear(LCD_COLOR_RED);
Lightsource 4:95e30a911d97 26 lcd.SetBackColor(LCD_COLOR_RED);
Lightsource 4:95e30a911d97 27 lcd.SetTextColor(LCD_COLOR_WHITE);
Lightsource 4:95e30a911d97 28 lcd.DisplayStringAt(0, LINE(5), (uint8_t *)"TOUCHSCREEN INIT FAIL", CENTER_MODE);
Lightsource 4:95e30a911d97 29 } else {
Lightsource 4:95e30a911d97 30 lcd.Clear(LCD_COLOR_BLACK);
Lightsource 4:95e30a911d97 31 lcd.SetBackColor(LCD_COLOR_BLACK);
Lightsource 4:95e30a911d97 32 lcd.SetTextColor(LCD_COLOR_WHITE);
Lightsource 4:95e30a911d97 33 lcd.DisplayStringAt(0, LINE(5), (uint8_t *)"TOUCHSCREEN INIT OK", CENTER_MODE);
Lightsource 4:95e30a911d97 34 }
Lightsource 4:95e30a911d97 35
Lightsource 4:95e30a911d97 36 wait(1);
Lightsource 4:95e30a911d97 37
Lightsource 4:95e30a911d97 38 //Mounting SD-based filesystem
Lightsource 4:95e30a911d97 39 sd.mount();
Lightsource 4:95e30a911d97 40
Lightsource 4:95e30a911d97 41 //Drawing BMP file from SD-card
Lightsource 4:95e30a911d97 42 drawImage("/sd/interface.bmp", 0, 0);
DieterGraef 0:134f7a094930 43 }
DieterGraef 0:134f7a094930 44
DieterGraef 0:134f7a094930 45
Lightsource 4:95e30a911d97 46 void drawImage(char * name, uint16_t x, uint16_t y){
Lightsource 4:95e30a911d97 47 int fileSize;
Lightsource 4:95e30a911d97 48 char * buffer;
Lightsource 4:95e30a911d97 49 FILE *Image = fopen(name, "rb"); // open the bmp file
Lightsource 4:95e30a911d97 50
Lightsource 4:95e30a911d97 51 //obtain file size:
Lightsource 4:95e30a911d97 52 fseek (Image , 0 , SEEK_END);
Lightsource 4:95e30a911d97 53 fileSize = ftell (Image);
Lightsource 4:95e30a911d97 54 rewind (Image);
Lightsource 4:95e30a911d97 55
Lightsource 4:95e30a911d97 56 // allocate memory to contain the whole file:
Lightsource 4:95e30a911d97 57 buffer = (char*) malloc (sizeof(char)*fileSize);
Lightsource 4:95e30a911d97 58
Lightsource 4:95e30a911d97 59 // copy the file into the buffer:
Lightsource 4:95e30a911d97 60 fseek (Image, 0 , SEEK_SET );
Lightsource 4:95e30a911d97 61 // set SD file data start position
Lightsource 4:95e30a911d97 62 fread (buffer,1,fileSize,Image);
Lightsource 4:95e30a911d97 63 fclose (Image);
DieterGraef 0:134f7a094930 64
Lightsource 4:95e30a911d97 65 //Draw image
Lightsource 4:95e30a911d97 66 lcd.DrawBitmap(x,y,(uint8_t *)buffer);
Lightsource 4:95e30a911d97 67
Lightsource 4:95e30a911d97 68 //Free allocated memory
Lightsource 4:95e30a911d97 69 free (buffer);
Lightsource 4:95e30a911d97 70 }