Rewrote the implementation of the SwapEndian_16() and SwapEndian_32() functions so...

[pub/USBasp.git] / Demos / Device / LowLevel / MassStorage / Lib / SCSI.c

diff --git a/Demos/Device/LowLevel/MassStorage/Lib/SCSI.c b/Demos/Device/LowLevel/MassStorage/Lib/SCSI.c
index 10e6bc4..111c3b7 100644 (file)
--- a/Demos/Device/LowLevel/MassStorage/Lib/SCSI.c
+++ b/Demos/Device/LowLevel/MassStorage/Lib/SCSI.c
@@ -159,7 +159,7 @@ static void SCSI_Command_Inquiry(void)
        uint8_t PadBytes[AllocationLength - BytesTransferred];
        
        /* Pad out remaining bytes with 0x00 */
-       Endpoint_Write_Stream_LE(&PadBytes, (AllocationLength - BytesTransferred), StreamCallback_AbortOnMassStoreReset);
+       Endpoint_Write_Stream_LE(&PadBytes, sizeof(PadBytes), StreamCallback_AbortOnMassStoreReset);
 
        /* Finalize the stream transfer to send the last packet */
        Endpoint_ClearIN();
@@ -182,7 +182,7 @@ static void SCSI_Command_Request_Sense(void)
        uint8_t PadBytes[AllocationLength - BytesTransferred];
        
        /* Pad out remaining bytes with 0x00 */
-       Endpoint_Write_Stream_LE(&PadBytes, (AllocationLength - BytesTransferred), StreamCallback_AbortOnMassStoreReset);
+       Endpoint_Write_Stream_LE(&PadBytes, sizeof(PadBytes), StreamCallback_AbortOnMassStoreReset);
 
        /* Finalize the stream transfer to send the last packet */
        Endpoint_ClearIN();
@@ -256,16 +256,12 @@ static void SCSI_Command_ReadWrite_10(const bool IsDataRead)
        uint32_t BlockAddress;
        uint16_t TotalBlocks;
        
-       /* Load in the 32-bit block address (SCSI uses big-endian, so have to do it byte-by-byte) */
-       ((uint8_t*)&BlockAddress)[3] = CommandBlock.SCSICommandData[2];
-       ((uint8_t*)&BlockAddress)[2] = CommandBlock.SCSICommandData[3];
-       ((uint8_t*)&BlockAddress)[1] = CommandBlock.SCSICommandData[4];
-       ((uint8_t*)&BlockAddress)[0] = CommandBlock.SCSICommandData[5];
-
-       /* Load in the 16-bit total blocks (SCSI uses big-endian, so have to do it byte-by-byte) */
-       ((uint8_t*)&TotalBlocks)[1]  = CommandBlock.SCSICommandData[7];
-       ((uint8_t*)&TotalBlocks)[0]  = CommandBlock.SCSICommandData[8];
-       
+       /* Load in the 32-bit block address (SCSI uses big-endian, so have to reverse the byte order) */
+       BlockAddress = SwapEndian_32(*(uint32_t*)&CommandBlock.SCSICommandData[2]);
+
+       /* Load in the 16-bit total blocks (SCSI uses big-endian, so have to reverse the byte order) */
+       TotalBlocks  = SwapEndian_16(*(uint16_t*)&CommandBlock.SCSICommandData[7]);
+
        /* Check if the block address is outside the maximum allowable value for the LUN */
        if (BlockAddress >= LUN_MEDIA_BLOCKS)
        {