Description
I am about to show images using JPG Library
What MCU/Processor/Board and compiler are you using?
Custom board with STM32f429 on
What do you want to achieve?
Show images using JPG Library
What have you tried so far?
So far I have been able to use LVGL on my board, use the touchpad input device and show some examples.
Now I want to set the picture of the image widget with data saved on an SDcard. So I have been able to use Fatfs and Freertos simultaneously and this part is ok. So I read the total data from SDcard and push it into external ram. Data is verified for some bits by hand and it was ok on the external ram.
Then I had set the read data on the external ram to be the image data but it was not shown.
Code to reproduce
In the main function, I have
lv_split_jpeg_init();
In the Main task, I have
uint bw;
FRESULT res;
double size;
lv_obj_t * img1;
res = f_open(&SDFile, "n.jpg", FA_READ);
size = f_size(&SDFile);
res = f_read(&SDFile, (uint8_t *)0xC1000000, size, &bw);
res = f_close(&SDFile);
lv_img_dsc_t myImage;
myImage.header.always_zero = 0;
myImage.header.w = 200;
myImage.header.h = 120;
myImage.data_size = size;
myImage.data = (uint8_t *)0xC1000000;
img1 = lv_img_create(lv_scr_act(), NULL);
lv_obj_set_size(img1, 200, 120);
lv_obj_set_pos(img1, 100, 100);
lv_img_set_src(img1, &myImage);
/* Infinite loop */
for(;;)
{
lv_tick_inc(30);
lv_task_handler();
osDelay(30);
}
No other widget is on the screen. Any other working decoder is acceptable. Where am I wrong?