예제 #1
0
파일: SCSI.c 프로젝트: 0tsuki/qmk_firmware 
/** Command processing for an issued SCSI READ CAPACITY (10) command. This command returns information about the device's capacity
 *  on the selected Logical Unit (drive), as a number of OS-sized blocks.
 *
 *  \param[in] MSInterfaceInfo  Pointer to the Mass Storage class interface structure that the command is associated with
 *
 *  \return Boolean \c true if the command completed successfully, \c false otherwise.
 */
static bool SCSI_Command_Read_Capacity_10(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
{
	Endpoint_Write_32_BE(LUN_MEDIA_BLOCKS - 1);
	Endpoint_Write_32_BE(SECTOR_SIZE_BYTES);
	Endpoint_ClearIN();

	/* Succeed the command and update the bytes transferred counter */
	MSInterfaceInfo->State.CommandBlock.DataTransferLength -= 8;

	return true;
}
예제 #2
0
/** Command processing for an issued SCSI READ CAPACITY (10) command. This command returns information about the device's capacity
 *  on the selected Logical Unit (drive), as a number of OS-sized blocks.
 *
 *  \return Boolean true if the command completed successfully, false otherwise.
 */
static bool SCSI_Command_Read_Capacity_10(void)
{
	/* Send the total number of logical blocks in the current LUN */
	Endpoint_Write_32_BE(LUN_MEDIA_BLOCKS - 1);

	/* Send the logical block size of the device (must be 512 bytes) */
	Endpoint_Write_32_BE(VIRTUAL_MEMORY_BLOCK_SIZE);

	/* Check if the current command is being aborted by the host */
	if (IsMassStoreReset)
	  return false;

	/* Send the endpoint data packet to the host */
	Endpoint_ClearIN();

	/* Succeed the command and update the bytes transferred counter */
	CommandBlock.DataTransferLength -= 8;

	return true;
}