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Add automatic application start on virtual disk ejection to the Mass Storage class bootloader.

This commit is contained in:
Dean Camera 2013-07-06 12:26:33 +02:00
parent f0c72df674
commit 8cfa2e8023
7 changed files with 120 additions and 8 deletions
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47
Bootloaders/MassStorage/BootloaderMassStorage.c
View File

@ -33,6 +33,7 @@
* Main source file for the Mass Storage class bootloader. This file contains the complete bootloader logic.
*/
#define INCLUDE_FROM_BOOTLOADER_MASSSTORAGE_C
#include "BootloaderMassStorage.h"
/** LUFA Mass Storage Class driver interface configuration and state information. This structure is
@ -60,7 +61,30 @@ USB_ClassInfo_MS_Device_t Disk_MS_Interface =
},
};
/** Flag to indicate if the bootloader should be running, or should exit and allow the application code to run
* via a soft reset. When cleared, the bootloader will abort, the USB interface will shut down and the application
* started via a forced watchdog reset.
*/
bool RunBootloader = true;
/** Magic lock for forced application start. If the HWBE fuse is programmed and BOOTRST is unprogrammed, the bootloader
* will start if the /HWB line of the AVR is held low and the system is reset. However, if the /HWB line is still held
* low when the application attempts to start via a watchdog reset, the bootloader will re-start. If set to the value
* \ref MAGIC_BOOT_KEY the special init function \ref Application_Jump_Check() will force the application to start.
*/
uint16_t MagicBootKey ATTR_NO_INIT;
/** Indicates if the bootloader is allowed to exit immediately if \ref RunBootloader is \c false. During shutdown all
* pending commands must be processed before jumping to the user-application, thus this tracks the main program loop
* iterations since a SCSI command from the host was received.
*/
static uint8_t TicksSinceLastCommand = 0;
/** Special startup routine to check if the bootloader was started via a watchdog reset, and if the magic application
* start key has been loaded into \ref MagicBootKey. If the bootloader started via the watchdog and the key is valid,
* this will force the user application to start via a software jump.
*/
void Application_Jump_Check(void)
{
bool JumpToApplication = false;
@ -90,6 +114,13 @@ void Application_Jump_Check(void)
JTAG_ENABLE();
#endif
/* If the reset source was the bootloader and the key is correct, clear it and jump to the application */
if ((MCUSR & (1 << WDRF)) && (MagicBootKey == MAGIC_BOOT_KEY))
{
MagicBootKey = 0;
JumpToApplication = true;
}
if (JumpToApplication)
{
// cppcheck-suppress constStatement
@ -107,11 +138,22 @@ int main(void)
LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
GlobalInterruptEnable();
for (;;)
while (RunBootloader || TicksSinceLastCommand++ < 0xFF)
{
MS_Device_USBTask(&Disk_MS_Interface);
USB_USBTask();
}
/* Disconnect from the host - USB interface will be reset later along with the AVR */
USB_Detach();
/* Unlock the forced application start mode of the bootloader if it is restarted */
MagicBootKey = MAGIC_BOOT_KEY;
/* Enable the watchdog and force a timeout to reset the AVR */
wdt_enable(WDTO_250MS);
for (;;);
}
/** Configures the board hardware and chip peripherals for the demo's functionality. */
@ -189,5 +231,8 @@ bool CALLBACK_MS_Device_SCSICommandReceived(USB_ClassInfo_MS_Device_t* const MSI
CommandSuccess = SCSI_DecodeSCSICommand(MSInterfaceInfo);
LEDs_SetAllLEDs(LEDMASK_USB_READY);
/* Signal that a command was processed, must not exit bootloader yet */
TicksSinceLastCommand = 0;
return CommandSuccess;
}

13
Bootloaders/MassStorage/BootloaderMassStorage.h
View File

@ -44,6 +44,7 @@
#include <string.h>
#include "Descriptors.h"
#include "Config/AppConfig.h"
#include "Lib/SCSI.h"
@ -72,11 +73,15 @@
/** LED mask for the library LED driver, to indicate that the USB interface is busy. */
#define LEDMASK_USB_BUSY LEDS_LED2
/** Magic bootloader key to unlock forced application start mode. */
#define MAGIC_BOOT_KEY 0xDC42
/* Global Variables: */
extern bool RunBootloader;
/* Function Prototypes: */
int main(void) AUX_BOOT_SECTION;
static void SetupHardware(void) AUX_BOOT_SECTION;
void Application_Jump_Check(void) ATTR_INIT_SECTION(3);
void EVENT_USB_Device_Connect(void) AUX_BOOT_SECTION;
@ -86,5 +91,9 @@
bool CALLBACK_MS_Device_SCSICommandReceived(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo) AUX_BOOT_SECTION;
#if defined(INCLUDE_FROM_BOOTLOADER_MASSSTORAGE_C)
static void SetupHardware(void) AUX_BOOT_SECTION;
#endif
#endif

12
Bootloaders/MassStorage/BootloaderMassStorage.txt
View File

@ -191,9 +191,15 @@
*
* <table>
* <tr>
* <td>
* None
* </td>
* <th><b>Define Name:</b></th>
* <th><b>Location:</b></th>
* <th><b>Description:</b></th>
* </tr>
* <tr>
* <td>NO_APP_START_ON_EJECT</td>
* <td>AppConfig.h</td>
* <td>Define to disable automatic start of the loaded application when the virtual
* Mass Storage disk is ejected on the host.</td>
* </tr>
* </table>
*/

47
Bootloaders/MassStorage/Config/AppConfig.h Normal file
View File

@ -0,0 +1,47 @@
/*
LUFA Library
Copyright (C) Dean Camera, 2013.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
Copyright 2013 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby granted
without fee, provided that the above copyright notice appear in
all copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the name of the author not be used in
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
The author disclaims all warranties with regard to this
software, including all implied warranties of merchantability
and fitness. In no event shall the author be liable for any
special, indirect or consequential damages or any damages
whatsoever resulting from loss of use, data or profits, whether
in an action of contract, negligence or other tortious action,
arising out of or in connection with the use or performance of
this software.
*/
/** \file
* \brief Application Configuration Header File
*
* This is a header file which is be used to configure LUFA's
* compile time options, as an alternative to the compile time
* constants supplied through a makefile.
*
* For information on what each token does, refer to the
* \ref Sec_Options section of the application documentation.
*/
#ifndef _APP_CONFIG_H_
#define _APP_CONFIG_H_
// #define NO_APP_START_ON_EJECT
#endif

6
Bootloaders/MassStorage/Lib/SCSI.c
View File

@ -113,8 +113,12 @@ bool SCSI_DecodeSCSICommand(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
case SCSI_CMD_MODE_SENSE_6:
CommandSuccess = SCSI_Command_ModeSense_6(MSInterfaceInfo);
break;
case SCSI_CMD_SEND_DIAGNOSTIC:
case SCSI_CMD_START_STOP_UNIT:
#if !defined(NO_APP_START_ON_EJECT)
/* If the user ejected the volume, signal bootloader exit at next opportunity. */
RunBootloader = ((MSInterfaceInfo->State.CommandBlock.SCSICommandData[4] & 0x03) != 0x02);
#endif
case SCSI_CMD_SEND_DIAGNOSTIC:
case SCSI_CMD_TEST_UNIT_READY:
case SCSI_CMD_PREVENT_ALLOW_MEDIUM_REMOVAL:
case SCSI_CMD_VERIFY_10:

1
Bootloaders/MassStorage/Lib/SCSI.h
View File

@ -42,6 +42,7 @@
#include <LUFA/Drivers/USB/USB.h>
#include "../BootloaderMassStorage.h"
#include "../Descriptors.h"
#include "VirtualFAT.h"

2
LUFA/Build/lufa_core.mk
View File

@ -131,7 +131,7 @@ help:
@printf " %b" "$(PRINTABLE_LUFA_PROVIDED_MACROS:%= - %\n)"
@echo " "
@echo "==================================================================="
@echo " The LUFA BuildSystem 2.0 - Powered By Duct Tape (tm) "
@echo " The LUFA BuildSystem 2.0 - Powered By Positive Thinking (tm) "
@echo "==================================================================="
# Lists build modules included by the project makefile, in alphabetical order