emwim无法显示从SD卡中读到的数据

hong9424 · 发表于 2018-6-15 09:57:55

GUI_Init();
/* Setup layer configuration during startup */
GUI_SelectLayer(1);
GUI_SetBkColor(GUI_BLUE);
//GUI_SetBkColor(GUI_BLACK);
GUI_Clear();
//GUI_DrawBitmap(&bmb152d62a2834349b1994c156c2ea15ce34d3bed6, 45, 20);
GUI_SetFont(GUI_FONT_32B_ASCII);
GUI_SetColor(GUI_BLACK);
GUI_DispStringAt("Hello World",360,200);
res_sd = f_mount(&fs,"0:/",1);
res_sd = f_open(&fnew, "1.jpg", FA_OPEN_EXISTING | FA_READ | FA_OPEN_ALWAYS);
if (res_sd != FR_OK)
{
}
hMem = GUI_ALLOC_AllocZero(fnew.fsize);
_acBuffer = GUI_ALLOC_h2p(hMem);
res_sd = f_read(&fnew, "1.jpg", fnew.fsize, &fnum);
if (res_sd != FR_OK)
{
}

GUI_JPEG_GetInfo(_acBuffer, fnew.fsize, &JpegInfo);
hMemJPEG = GUI_MEMDEV_CreateEx(200, 200, JpegInfo.XSize, JpegInfo.YSize, GUI_MEMDEV_HASTRANS);
GUI_MEMDEV_Select(hMemJPEG);
GUI_JPEG_Draw(_acBuffer, fnew.fsize, 200, 200);
GUI_MEMDEV_WriteAt(hMemJPEG, 200, 200);
GUI_MEMDEV_Select(0);
GUI_ALLOC_Free(hMem);
f_close(&fnew);
GUI_MEMDEV_WriteAt(hMemJPEG, 0, 0);
这个代码无法显示读出来的数据，从SD卡能读取成功，但是就是不能显示