264 lines
8.8 KiB
C
264 lines
8.8 KiB
C
/*
|
|
LUFA Library
|
|
Copyright (C) Dean Camera, 2017.
|
|
|
|
dean [at] fourwalledcubicle [dot] com
|
|
www.lufa-lib.org
|
|
*/
|
|
|
|
/*
|
|
Copyright 2017 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
|
|
*
|
|
* 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
|
|
* passed to all Mass Storage Class driver functions, so that multiple instances of the same class
|
|
* within a device can be differentiated from one another.
|
|
*/
|
|
USB_ClassInfo_MS_Device_t Disk_MS_Interface =
|
|
{
|
|
.Config =
|
|
{
|
|
.InterfaceNumber = INTERFACE_ID_MassStorage,
|
|
.DataINEndpoint =
|
|
{
|
|
.Address = MASS_STORAGE_IN_EPADDR,
|
|
.Size = MASS_STORAGE_IO_EPSIZE,
|
|
.Banks = 1,
|
|
},
|
|
.DataOUTEndpoint =
|
|
{
|
|
.Address = MASS_STORAGE_OUT_EPADDR,
|
|
.Size = MASS_STORAGE_IO_EPSIZE,
|
|
.Banks = 1,
|
|
},
|
|
.TotalLUNs = 1,
|
|
},
|
|
};
|
|
|
|
/** 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;
|
|
|
|
#if (BOARD == BOARD_LEONARDO)
|
|
/* Enable pull-up on the IO13 pin so we can use it to select the mode */
|
|
PORTC |= (1 << 7);
|
|
Delay_MS(10);
|
|
|
|
/* If IO13 is not jumpered to ground, start the user application instead */
|
|
JumpToApplication = ((PINC & (1 << 7)) != 0);
|
|
|
|
/* Disable pull-up after the check has completed */
|
|
PORTC &= ~(1 << 7);
|
|
#elif ((BOARD == BOARD_XPLAIN) || (BOARD == BOARD_XPLAIN_REV1))
|
|
/* Disable JTAG debugging */
|
|
JTAG_DISABLE();
|
|
|
|
/* Enable pull-up on the JTAG TCK pin so we can use it to select the mode */
|
|
PORTF |= (1 << 4);
|
|
Delay_MS(10);
|
|
|
|
/* If the TCK pin is not jumpered to ground, start the user application instead */
|
|
JumpToApplication = ((PINF & (1 << 4)) != 0);
|
|
|
|
/* Re-enable JTAG debugging */
|
|
JTAG_ENABLE();
|
|
#else
|
|
/* Check if the device's BOOTRST fuse is set */
|
|
if (boot_lock_fuse_bits_get(GET_HIGH_FUSE_BITS) & FUSE_BOOTRST)
|
|
{
|
|
/* If the reset source was not an external reset or the key is correct, clear it and jump to the application */
|
|
if (!(MCUSR & (1 << EXTRF)) || (MagicBootKey == MAGIC_BOOT_KEY))
|
|
JumpToApplication = true;
|
|
|
|
/* Clear reset source */
|
|
MCUSR &= ~(1 << EXTRF);
|
|
}
|
|
else
|
|
{
|
|
/* If the reset source was the bootloader and the key is correct, clear it and jump to the application;
|
|
* this can happen in the HWBE fuse is set, and the HBE pin is low during the watchdog reset */
|
|
if ((MCUSR & (1 << WDRF)) && (MagicBootKey == MAGIC_BOOT_KEY))
|
|
JumpToApplication = true;
|
|
|
|
/* Clear reset source */
|
|
MCUSR &= ~(1 << WDRF);
|
|
}
|
|
#endif
|
|
|
|
/* Don't run the user application if the reset vector is blank (no app loaded) */
|
|
bool ApplicationValid = (pgm_read_word_near(0) != 0xFFFF);
|
|
|
|
/* If a request has been made to jump to the user application, honor it */
|
|
if (JumpToApplication && ApplicationValid)
|
|
{
|
|
/* Turn off the watchdog */
|
|
MCUSR &= ~(1 << WDRF);
|
|
wdt_disable();
|
|
|
|
/* Clear the boot key and jump to the user application */
|
|
MagicBootKey = 0;
|
|
|
|
// cppcheck-suppress constStatement
|
|
((void (*)(void))0x0000)();
|
|
}
|
|
}
|
|
|
|
/** Main program entry point. This routine configures the hardware required by the application, then
|
|
* enters a loop to run the application tasks in sequence.
|
|
*/
|
|
int main(void)
|
|
{
|
|
SetupHardware();
|
|
|
|
LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
|
|
GlobalInterruptEnable();
|
|
|
|
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. */
|
|
static void SetupHardware(void)
|
|
{
|
|
/* Disable watchdog if enabled by bootloader/fuses */
|
|
MCUSR &= ~(1 << WDRF);
|
|
wdt_disable();
|
|
|
|
/* Disable clock division */
|
|
clock_prescale_set(clock_div_1);
|
|
|
|
/* Relocate the interrupt vector table to the bootloader section */
|
|
MCUCR = (1 << IVCE);
|
|
MCUCR = (1 << IVSEL);
|
|
|
|
/* Hardware Initialization */
|
|
LEDs_Init();
|
|
USB_Init();
|
|
|
|
/* Bootloader active LED toggle timer initialization */
|
|
TIMSK1 = (1 << TOIE1);
|
|
TCCR1B = ((1 << CS11) | (1 << CS10));
|
|
}
|
|
|
|
/** ISR to periodically toggle the LEDs on the board to indicate that the bootloader is active. */
|
|
ISR(TIMER1_OVF_vect, ISR_BLOCK)
|
|
{
|
|
LEDs_ToggleLEDs(LEDS_LED1 | LEDS_LED2);
|
|
}
|
|
|
|
/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs. */
|
|
void EVENT_USB_Device_Connect(void)
|
|
{
|
|
/* Indicate USB enumerating */
|
|
LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
|
|
}
|
|
|
|
/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via
|
|
* the status LEDs and stops the Mass Storage management task.
|
|
*/
|
|
void EVENT_USB_Device_Disconnect(void)
|
|
{
|
|
/* Indicate USB not ready */
|
|
LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
|
|
}
|
|
|
|
/** Event handler for the library USB Configuration Changed event. */
|
|
void EVENT_USB_Device_ConfigurationChanged(void)
|
|
{
|
|
bool ConfigSuccess = true;
|
|
|
|
/* Setup Mass Storage Data Endpoints */
|
|
ConfigSuccess &= MS_Device_ConfigureEndpoints(&Disk_MS_Interface);
|
|
|
|
/* Indicate endpoint configuration success or failure */
|
|
LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
|
|
}
|
|
|
|
/** Event handler for the library USB Control Request reception event. */
|
|
void EVENT_USB_Device_ControlRequest(void)
|
|
{
|
|
MS_Device_ProcessControlRequest(&Disk_MS_Interface);
|
|
}
|
|
|
|
/** Mass Storage class driver callback function the reception of SCSI commands from the host, which must be processed.
|
|
*
|
|
* \param[in] MSInterfaceInfo Pointer to the Mass Storage class interface configuration structure being referenced
|
|
*/
|
|
bool CALLBACK_MS_Device_SCSICommandReceived(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
|
|
{
|
|
bool CommandSuccess;
|
|
|
|
LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
|
|
CommandSuccess = SCSI_DecodeSCSICommand(MSInterfaceInfo);
|
|
LEDs_SetAllLEDs(LEDMASK_USB_READY);
|
|
|
|
/* Signal that a command was processed, must not exit bootloader yet */
|
|
TicksSinceLastCommand = 0;
|
|
|
|
return CommandSuccess;
|
|
}
|