Hi David,

Thanks for your answer and for this library also :) I have tried your tricks but unfortunately, it doesn't work, and since you didn't make any comment regarding my code, I assume that there is nothing wrong in the code. The only strange thing is that when I generate the final bin file, and when I want to copy it to the mbed device, it is written that that the file is encrypted and that mbed doesn't accept this. The PC asks me to copy the file without the encryption and I accept.

Would it be possible to share with me a C code that works to display one image from the flash, as well as the image file (JPEG or bmp + bin file generated), the compiled bin file of the C code, and the jointed bin file ? I think that could be very useful to see where the problem comes from on my side.

Thanks,

Quentin

I also forgot to ask you if you would have a C code example to read an image from the SD card connected on the screen board, and display it on the screen ?

I took one of my demo's and updated it for the FlashFileSystem. Take a look at PUB_RA8875_Bitmap. This was built and tested on an LPC1768, with the 800x480 version of the RA8875 display. It reads a large jpg from the flash file system and if you've put a couple of other images on the local file system it will render them all in sequence.

You will see that I use a different API, but it ends up in the same place. The API I call figures out which rendering methods to use.

And refer to the main.cpp source - not just the sample on the liked page.

Simplified source -

TestImage_T TestImage[] = {
    { 0, 0, "/flash/RomeC.jpg"},
    { 0, 0, "/local/desert.bmp"},
    { 0, 0, "/local/Module.jpg"},
};
 
 
 
int main()
{
    pc.baud(460800);    // I like a snappy terminal, so crank it up!
    pc.printf("\r\nRA8875 Bitmap Test - Build " __DATE__ " " __TIME__ "\r\n");
 
    lcd.init(LCD_W, LCD_H, LCD_C);
    lcd.Backlight(0.5f);
    
    int count = sizeof(TestImage)/sizeof(TestImage[0]);
    while (1) {
        for (int i=0; i<count; i++) {
            lcd.cls();
            printf("RenderBitmapFile(%d, %d, %s) ", TestImage[i].x, TestImage[i].y, TestImage[i].filename);
            wait(2);
            RetCode_t r = lcd.RenderImageFile(TestImage[i].x, TestImage[i].y, TestImage[i].filename);
            printf("returned %d\r\n", r);
            wait(5);
        }
    }
}

Hi David,

Thank you very much for the example. Now it works. I didn't use any header file in my previous example, but I chose to combine the binary files (mbed code + .bin image) before loading the bin code on the device. I still don't know why my technic wasn't working but the most important is that I have something that works now. However, I was expecting to render the image coming from the flash file system very fastly compared to the one coming from the local system, but it takes exactly the same time (and the size of the two pictures I am displaying is also the same). Any idea why ?

Would you also mind to provide a C code example to read an image from the SD card connected on the screen board, and display it on the screen ?

Thank you very much for all your help, that's very useful.

Quentin