LCD+JPEG 解码记忆体空间问题

hans5966

各位好！

想与各位请教，目前我正在使用JPEG解码器将图片从SD卡解码后显示到LCD，同时有显示问题，程序参考STM32H7官方JPEG，检查过后扩大Chunk值后有一点改善，可是仍然部分少图。

1. /* Private define ------------------------------------------------------------*/
   
2. 
   
3. #define CHUNK_SIZE_IN  ((uint32_t)(64 * 1024))//(4096)) //
   
4. #define CHUNK_SIZE_OUT ((uint32_t)(64 * 1024))//(64 * 1024))
   
5. 
   
6. #define JPEG_BUFFER_EMPTY 0
   
7. #define JPEG_BUFFER_FULL  1
   
8. 
   
9. #define NB_OUTPUT_DATA_BUFFERS      2
   
10. #define NB_INPUT_DATA_BUFFERS       2
    
11. 
    
12. /* Private macro -------------------------------------------------------------*/
    
13. /* Private variables ---------------------------------------------------------*/
    
14. 
    
15. FIL *pFile;     /* pointer to File object */
    
16. 
    
17. uint8_t JPEG_Data_InBuffer0[CHUNK_SIZE_IN];
    
18. uint8_t JPEG_Data_InBuffer1[CHUNK_SIZE_IN];
    
19. 
    
20. 
    
21. JPEG_Data_BufferTypeDef Jpeg_IN_BufferTab[NB_INPUT_DATA_BUFFERS] =
    
22. {
    
23.   {JPEG_BUFFER_EMPTY , JPEG_Data_InBuffer0, 0},
    
24.   {JPEG_BUFFER_EMPTY , JPEG_Data_InBuffer1, 0}
    
25. };

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1. uint32_t JPEG_Decode_DMA(JPEG_HandleTypeDef *hjpeg, FIL *file, uint32_t DestAddress)
   
2. {
   
3.   uint32_t i;
   
4.   
   
5.   pFile = file;
   
6.   FrameBufferAddress = DestAddress;
   
7.          
   
8.   /* Read from JPG file and fill input buffers */
   
9.   for(i = 0; i < NB_INPUT_DATA_BUFFERS; i++)
   
10.   {
    
11.     if(f_read (pFile, Jpeg_IN_BufferTab[i].DataBuffer , CHUNK_SIZE_IN, (UINT*)(&Jpeg_IN_BufferTab[i].DataBufferSize)) == FR_OK)
    
12.     {
    
13.       Jpeg_IN_BufferTab[i].State = JPEG_BUFFER_FULL;
    
14.     }
    
15.     else
    
16.     {
    
17.       Error_Handler();
    
18.     }        
    
19.   }
    
20.   /* Start JPEG decoding with DMA method */
    
21.   HAL_JPEG_Decode_DMA(hjpeg ,Jpeg_IN_BufferTab[0].DataBuffer ,Jpeg_IN_BufferTab[0].DataBufferSize ,(uint8_t *)FrameBufferAddress ,CHUNK_SIZE_OUT);
    
22.   
    
23.        
    
24.   return 0;
    
25. }

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还请各位协助！
谢谢！