Commit for the 091122 release.

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

diff --git a/Demos/Device/ClassDriver/MassStorage/Lib/SCSI.c b/Demos/Device/ClassDriver/MassStorage/Lib/SCSI.c
index 468a04a..2e5adba 100644 (file)
--- a/Demos/Device/ClassDriver/MassStorage/Lib/SCSI.c
+++ b/Demos/Device/ClassDriver/MassStorage/Lib/SCSI.c
@@ -239,8 +239,6 @@ static void SCSI_Command_Send_Diagnostic(USB_ClassInfo_MS_Device_t* MSInterfaceI
        \r
        /* Succeed the command and update the bytes transferred counter */\r
        MSInterfaceInfo->State.CommandBlock.DataTransferLength = 0;\r
-       \r
-       return;\r
 }\r
 \r
 /** Command processing for an issued SCSI READ (10) or WRITE (10) command. This command reads in the block start address\r
@@ -255,15 +253,11 @@ static void SCSI_Command_ReadWrite_10(USB_ClassInfo_MS_Device_t* MSInterfaceInfo
        uint32_t BlockAddress;\r
        uint16_t TotalBlocks;\r
        \r
-       /* Load in the 32-bit block address (SCSI uses big-endian, so have to do it byte-by-byte) */\r
-       ((uint8_t*)&BlockAddress)[3] = MSInterfaceInfo->State.CommandBlock.SCSICommandData[2];\r
-       ((uint8_t*)&BlockAddress)[2] = MSInterfaceInfo->State.CommandBlock.SCSICommandData[3];\r
-       ((uint8_t*)&BlockAddress)[1] = MSInterfaceInfo->State.CommandBlock.SCSICommandData[4];\r
-       ((uint8_t*)&BlockAddress)[0] = MSInterfaceInfo->State.CommandBlock.SCSICommandData[5];\r
+       /* Load in the 32-bit block address (SCSI uses big-endian, so have to reverse the byte order) */\r
+       BlockAddress = SwapEndian_32(*(uint32_t*)&MSInterfaceInfo->State.CommandBlock.SCSICommandData[2]);\r
 \r
-       /* Load in the 16-bit total blocks (SCSI uses big-endian, so have to do it byte-by-byte) */\r
-       ((uint8_t*)&TotalBlocks)[1]  = MSInterfaceInfo->State.CommandBlock.SCSICommandData[7];\r
-       ((uint8_t*)&TotalBlocks)[0]  = MSInterfaceInfo->State.CommandBlock.SCSICommandData[8];\r
+       /* Load in the 16-bit total blocks (SCSI uses big-endian, so have to reverse the byte order) */\r
+       TotalBlocks  = SwapEndian_16(*(uint32_t*)&MSInterfaceInfo->State.CommandBlock.SCSICommandData[7]);\r
        \r
        /* Check if the block address is outside the maximum allowable value for the LUN */\r
        if (BlockAddress >= LUN_MEDIA_BLOCKS)\r
@@ -289,6 +283,4 @@ static void SCSI_Command_ReadWrite_10(USB_ClassInfo_MS_Device_t* MSInterfaceInfo
 \r
        /* Update the bytes transferred counter and succeed the command */\r
        MSInterfaceInfo->State.CommandBlock.DataTransferLength -= ((uint32_t)TotalBlocks * VIRTUAL_MEMORY_BLOCK_SIZE);\r
-       \r
-       return;\r
 }\r