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本帖最后由 Hans 于 2019-12-9 15:06 编辑
各位好,
想与各位请教，我现在尝试建立FatFS的方式读取SDCard中的 JPG，想以硬体解码的方式透过DMA2D显示于屏幕上。
已参考过官方例子，但似乎在某些部分有点问题(STM32CubeMX 中 JPEG_DecodingUsingFs_DMA )
以下为移植后程序，进入#8(do..while)后却无法结束- void HWJPEG(void)
- {
- FRESULT ret;
- uint32_t xPos = 0, yPos = 0;
-
- ret = f_mount(&SDFatFS,SDPath,0);
- if(ret != FR_OK)
- {
- printf("Mount Failed!\r\n");
- }
- printf("Mount Success!\r\n");
-
- //Cause of too quick and not get
- HAL_Delay(60);
-
- ret = f_open(&SDFile,IMAGE_FILE,FA_READ);
- if(ret != FR_OK)
- {
- printf("Open Failed!\r\n");
- }
-
- else
- {
- printf("Open Success!\r\n");
- /*##-7- JPEG decoding with DMA (Not Blocking ) Method ################*/
- JPEG_Decode_DMA(&hjpeg, &SDFile, JPEG_OUTPUT_DATA_BUFFER);
- /*##-8- Wait till end of JPEG decoding and perfom Input Processing in BackGround #*/
- do
- {
-
- JpegProcessing_End = JPEG_InputHandler(&hjpeg);
-
- }while(JpegProcessing_End == 0);
-
- /*##-9- Get JPEG Info ###############################################*/
- HAL_JPEG_GetInfo(&hjpeg, &JPEG_Info);
- /*##-10- Copy RGB decoded Data to the display FrameBuffer ############*/
- xPos = (BSP_LCD_GetXSize() - JPEG_Info.ImageWidth)/2;
- yPos = (BSP_LCD_GetYSize() - JPEG_Info.ImageHeight)/2;
- DMA2D_CopyBuffer((uint32_t *)JPEG_OUTPUT_DATA_BUFFER, (uint32_t *)LCD_FRAME_BUFFER, xPos , yPos, JPEG_Info.ImageWidth, JPEG_Info.ImageHeight, JPEG_Info.ChromaSubsampling);
- }
-
-
-
-
- f_close(&SDFile);
- }
不知板上各位是否有此相关的经验可以给予参考呢?
感谢!!
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发表于 2019-12-9 15:03:31
发表于 2019-12-10 08:09:52
楼主
