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421 lines
13 KiB
421 lines
13 KiB
/*
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LUFA Library
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Copyright (C) Dean Camera, 2009.
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dean [at] fourwalledcubicle [dot] com
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www.fourwalledcubicle.com
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*/
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/*
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Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, and distribute this software
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and its documentation for any purpose and without fee is hereby
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granted, provided that the above copyright notice appear in all
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copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaim all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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/** \file
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*
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* Main source file for the MassStorageHost demo. This file contains the main tasks of
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* the demo and is responsible for the initial application hardware configuration.
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*/
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#include "MassStorageHost.h"
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/* Project Tags, for reading out using the ButtLoad project */
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BUTTLOADTAG(ProjName, "LUFA MS Host App");
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BUTTLOADTAG(BuildTime, __TIME__);
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BUTTLOADTAG(BuildDate, __DATE__);
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BUTTLOADTAG(LUFAVersion, "LUFA V" LUFA_VERSION_STRING);
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/* Scheduler Task List */
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TASK_LIST
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{
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{ Task: USB_USBTask , TaskStatus: TASK_STOP },
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{ Task: USB_MassStore_Host , TaskStatus: TASK_STOP },
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};
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/* Globals */
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/** Index of the highest available LUN (Logical Unit) in the attached Mass Storage Device */
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uint8_t MassStore_MaxLUNIndex;
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/** Main program entry point. This routine configures the hardware required by the application, then
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* starts the scheduler to run the application tasks.
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*/
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int main(void)
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{
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/* Disable watchdog if enabled by bootloader/fuses */
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MCUSR &= ~(1 << WDRF);
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wdt_disable();
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/* Disable Clock Division */
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SetSystemClockPrescaler(0);
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/* Hardware Initialization */
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SerialStream_Init(9600, false);
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LEDs_Init();
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HWB_Init();
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/* Indicate USB not ready */
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UpdateStatus(Status_USBNotReady);
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/* Startup message */
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puts_P(PSTR(ESC_RESET ESC_BG_WHITE ESC_INVERSE_ON ESC_ERASE_DISPLAY
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"MassStore Host Demo running.\r\n" ESC_INVERSE_OFF));
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/* Initialize Scheduler so that it can be used */
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Scheduler_Init();
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/* Initialize USB Subsystem */
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USB_Init();
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/* Scheduling routine never returns, so put this last in the main function */
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Scheduler_Start();
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}
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/** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
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* starts the library USB task to begin the enumeration and USB management process.
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*/
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EVENT_HANDLER(USB_DeviceAttached)
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{
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puts_P(PSTR("Device Attached.\r\n"));
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UpdateStatus(Status_USBEnumerating);
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/* Start USB management task to enumerate the device */
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Scheduler_SetTaskMode(USB_USBTask, TASK_RUN);
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}
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/** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
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* stops the library USB task management process.
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*/
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EVENT_HANDLER(USB_DeviceUnattached)
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{
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/* Stop USB management and Mass Storage tasks */
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Scheduler_SetTaskMode(USB_USBTask, TASK_STOP);
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Scheduler_SetTaskMode(USB_MassStore_Host, TASK_STOP);
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puts_P(PSTR("\r\nDevice Unattached.\r\n"));
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UpdateStatus(Status_USBNotReady);
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}
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/** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
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* enumerated by the host and is now ready to be used by the application.
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*/
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EVENT_HANDLER(USB_DeviceEnumerationComplete)
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{
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/* Once device is fully enumerated, start the Mass Storage Host task */
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Scheduler_SetTaskMode(USB_MassStore_Host, TASK_RUN);
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/* Indicate device enumeration complete */
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UpdateStatus(Status_USBReady);
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}
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/** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
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EVENT_HANDLER(USB_HostError)
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{
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USB_ShutDown();
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puts_P(PSTR(ESC_BG_RED "Host Mode Error\r\n"));
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printf_P(PSTR(" -- Error Code %d\r\n"), ErrorCode);
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UpdateStatus(Status_HardwareError);
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for(;;);
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}
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/** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occured while
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* enumerating an attached USB device.
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*/
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EVENT_HANDLER(USB_DeviceEnumerationFailed)
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{
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puts_P(PSTR(ESC_BG_RED "Dev Enum Error\r\n"));
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printf_P(PSTR(" -- Error Code %d\r\n"), ErrorCode);
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printf_P(PSTR(" -- Sub Error Code %d\r\n"), SubErrorCode);
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printf_P(PSTR(" -- In State %d\r\n"), USB_HostState);
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UpdateStatus(Status_EnumerationError);
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}
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/** Task to set the configuration of the attached device after it has been enumerated, and to read in blocks from
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* the device and print them to the serial port.
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*/
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TASK(USB_MassStore_Host)
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{
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uint8_t ErrorCode;
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switch (USB_HostState)
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{
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case HOST_STATE_Addressed:
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/* Standard request to set the device configuration to configuration 1 */
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USB_HostRequest = (USB_Host_Request_Header_t)
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{
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bmRequestType: (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_DEVICE),
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bRequest: REQ_SetConfiguration,
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wValue: 1,
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wIndex: 0,
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wLength: 0,
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};
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/* Send the request, display error and wait for device detatch if request fails */
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if ((ErrorCode = USB_Host_SendControlRequest(NULL)) != HOST_SENDCONTROL_Successful)
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{
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puts_P(PSTR("Control Error (Set Configuration).\r\n"));
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printf_P(PSTR(" -- Error Code: %d\r\n"), ErrorCode);
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/* Indicate error via status LEDs */
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UpdateStatus(Status_EnumerationError);
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/* Wait until USB device disconnected */
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while (USB_IsConnected);
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break;
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}
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USB_HostState = HOST_STATE_Configured;
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break;
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case HOST_STATE_Configured:
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puts_P(PSTR("Getting Config Data.\r\n"));
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/* Get and process the configuration descriptor data */
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if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead)
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{
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if (ErrorCode == ControlError)
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puts_P(PSTR("Control Error (Get Configuration).\r\n"));
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else
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puts_P(PSTR("Invalid Device.\r\n"));
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printf_P(PSTR(" -- Error Code: %d\r\n"), ErrorCode);
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/* Indicate error via status LEDs */
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UpdateStatus(Status_EnumerationError);
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/* Wait until USB device disconnected */
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while (USB_IsConnected);
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break;
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}
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puts_P(PSTR("Mass Storage Disk Enumerated.\r\n"));
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USB_HostState = HOST_STATE_Ready;
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break;
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case HOST_STATE_Ready:
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/* Indicate device busy via the status LEDs */
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UpdateStatus(Status_Busy);
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/* Reset the Mass Storage device interface, ready for use */
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if ((ErrorCode = MassStore_MassStorageReset()) != HOST_SENDCONTROL_Successful)
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{
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ShowDiskReadError(PSTR("Mass Storage Reset"), ErrorCode);
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break;
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}
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/* Send the request, display error and wait for device detatch if request fails */
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if ((ErrorCode = MassStore_GetMaxLUN(&MassStore_MaxLUNIndex)) != HOST_SENDCONTROL_Successful)
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{
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ShowDiskReadError(PSTR("Get Max LUN"), ErrorCode);
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break;
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}
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/* Print number of LUNs detected in the attached device */
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printf_P(PSTR("Total LUNs: %d.\r\n"), (MassStore_MaxLUNIndex + 1));
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/* Set the prevent removal flag for the device, allowing it to be accessed */
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if ((ErrorCode = MassStore_PreventAllowMediumRemoval(0, true)) != 0)
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{
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ShowDiskReadError(PSTR("Prevent/Allow Medium Removal"), ErrorCode);
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break;
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}
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/* Get sense data from the device - many devices will not accept any other commands until the sense data
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* is read - both on startup and after a failed command */
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SCSI_Request_Sense_Response_t SenseData;
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if ((ErrorCode = MassStore_RequestSense(0, &SenseData)) != 0)
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{
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ShowDiskReadError(PSTR("Request Sense"), ErrorCode);
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break;
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}
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puts_P(PSTR("Waiting until ready"));
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/* Wait until disk ready */
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do
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{
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Serial_TxByte('.');
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MassStore_TestUnitReady(0);
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}
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while ((SCSICommandStatus.Status != Command_Pass) && USB_IsConnected);
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/* Abort if device removed */
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if (!(USB_IsConnected))
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break;
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puts_P(PSTR("\r\nRetrieving Capacity... "));
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/* Create new structure for the disk's capacity in blocks and block size */
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SCSI_Capacity_t DiskCapacity;
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/* Retrieve disk capacity */
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if ((ErrorCode = MassStore_ReadCapacity(0, &DiskCapacity)) != 0)
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{
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ShowDiskReadError(PSTR("Read Capacity"), ErrorCode);
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break;
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}
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/* Display the disk capacity in blocks * block size bytes */
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printf_P(PSTR("%lu blocks of %lu bytes.\r\n"), DiskCapacity.Blocks, DiskCapacity.BlockSize);
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/* Create a new buffer capabable of holding a single block from the device */
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uint8_t BlockBuffer[DiskCapacity.BlockSize];
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/* Read in the first 512 byte block from the device */
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if ((ErrorCode = MassStore_ReadDeviceBlock(0, 0x00000000, 1, DiskCapacity.BlockSize, BlockBuffer)) != 0)
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{
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ShowDiskReadError(PSTR("Read Device Block"), ErrorCode);
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break;
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}
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/* Show the number of bytes not transferred in the previous command */
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printf_P(PSTR("Transfer Residue: %lu\r\n"), SCSICommandStatus.DataTransferResidue);
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puts_P(PSTR("\r\nContents of first block:\r\n"));
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/* Print out the first block in both HEX and ASCII, 16 bytes per line */
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for (uint16_t Chunk = 0; Chunk < (DiskCapacity.BlockSize >> 4); Chunk++)
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{
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/* Pointer to the start of the current 16-byte chunk in the read block of data */
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uint8_t* ChunkPtr = &BlockBuffer[Chunk << 4];
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/* Print out the 16 bytes of the chunk in HEX format */
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for (uint8_t ByteOffset = 0; ByteOffset < (1 << 4); ByteOffset++)
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{
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char CurrByte = *(ChunkPtr + ByteOffset);
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printf_P(PSTR("%.2X "), CurrByte);
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}
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puts_P(PSTR(" "));
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/* Print out the 16 bytes of the chunk in ASCII format */
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for (uint8_t ByteOffset = 0; ByteOffset < (1 << 4); ByteOffset++)
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{
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char CurrByte = *(ChunkPtr + ByteOffset);
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putchar(isprint(CurrByte) ? CurrByte : '.');
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}
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puts_P(PSTR("\r\n"));
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}
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puts_P(PSTR("\r\n\r\nPress HWB to read entire ASCII contents of disk...\r\n\r\n"));
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/* Wait for HWB to be pressed */
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while (!(HWB_GetStatus()))
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{
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/* Abort if device removed */
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if (!(USB_IsConnected))
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break;
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}
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/* Print out the entire disk contents in ASCII format */
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for (uint32_t CurrBlock = 0; CurrBlock < DiskCapacity.Blocks; CurrBlock++)
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{
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/* Read in the next block of data from the device */
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if ((ErrorCode = MassStore_ReadDeviceBlock(0, CurrBlock, 1, DiskCapacity.BlockSize, BlockBuffer)) != 0)
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{
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ShowDiskReadError(PSTR("Read Device Block"), ErrorCode);
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break;
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}
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/* Send the ASCII data in the read in block to the serial port */
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for (uint16_t Byte = 0; Byte < DiskCapacity.BlockSize; Byte++)
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{
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char CurrByte = BlockBuffer[Byte];
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putchar(isprint(CurrByte) ? CurrByte : '.');
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}
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/* Abort if device removed */
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if (!(USB_IsConnected))
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break;
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}
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/* Indicate device no longer busy */
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UpdateStatus(Status_USBReady);
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/* Wait until USB device disconnected */
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while (USB_IsConnected);
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break;
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}
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}
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/** Function to manage status updates to the user. This is done via LEDs on the given board, if available, but may be changed to
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* log to a serial port, or anything else that is suitable for status updates.
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*
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* \param CurrentStatus Current status of the system, from the MassStorageHost_StatusCodes_t enum
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*/
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void UpdateStatus(uint8_t CurrentStatus)
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{
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uint8_t LEDMask = LEDS_NO_LEDS;
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/* Set the LED mask to the appropriate LED mask based on the given status code */
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switch (CurrentStatus)
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{
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case Status_USBNotReady:
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LEDMask = (LEDS_LED1);
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break;
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case Status_USBEnumerating:
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LEDMask = (LEDS_LED1 | LEDS_LED2);
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break;
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case Status_USBReady:
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LEDMask = (LEDS_LED2);
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break;
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case Status_EnumerationError:
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case Status_HardwareError:
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case Status_SCSICommandError:
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LEDMask = (LEDS_LED1 | LEDS_LED3);
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break;
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case Status_Busy:
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LEDMask = (LEDS_LED1 | LEDS_LED4);
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break;
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}
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/* Set the board LEDs to the new LED mask */
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LEDs_SetAllLEDs(LEDMask);
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}
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/** Indicates that a communication error has ocurred with the attached Mass Storage Device,
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* printing error codes to the serial port and waiting until the device is removed before
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* continuing.
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*
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* \param CommandString ASCII string located in PROGMEM space indicating what operation failed
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* \param ErrorCode Error code of the function which failed to complete successfully
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*/
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void ShowDiskReadError(char* CommandString, uint8_t ErrorCode)
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{
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/* Display the error code */
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printf_P(PSTR(ESC_BG_RED "Command error (%S).\r\n"), CommandString);
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printf_P(PSTR(" -- Error Code: %d"), ErrorCode);
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Pipe_Freeze();
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/* Indicate device error via the status LEDs */
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UpdateStatus(Status_SCSICommandError);
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/* Wait until USB device disconnected */
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while (USB_IsConnected);
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}
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