diff options
Diffstat (limited to 'tmk_core/protocol/lufa/LUFA-git/Bootloaders/MassStorage')
17 files changed, 4939 insertions, 0 deletions
diff --git a/tmk_core/protocol/lufa/LUFA-git/Bootloaders/MassStorage/BootloaderAPI.c b/tmk_core/protocol/lufa/LUFA-git/Bootloaders/MassStorage/BootloaderAPI.c new file mode 100644 index 0000000000..cad59c8ca2 --- /dev/null +++ b/tmk_core/protocol/lufa/LUFA-git/Bootloaders/MassStorage/BootloaderAPI.c @@ -0,0 +1,76 @@ +/* + LUFA Library + Copyright (C) Dean Camera, 2014. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2014 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 + * + * Bootloader user application API functions. + */ + +#include "BootloaderAPI.h" + +void BootloaderAPI_ErasePage(const uint32_t Address) +{ + boot_page_erase_safe(Address); + boot_spm_busy_wait(); + boot_rww_enable(); +} + +void BootloaderAPI_WritePage(const uint32_t Address) +{ + boot_page_write_safe(Address); + boot_spm_busy_wait(); + boot_rww_enable(); +} + +void BootloaderAPI_FillWord(const uint32_t Address, const uint16_t Word) +{ + boot_page_fill_safe(Address, Word); +} + +uint8_t BootloaderAPI_ReadSignature(const uint16_t Address) +{ + return boot_signature_byte_get(Address); +} + +uint8_t BootloaderAPI_ReadFuse(const uint16_t Address) +{ + return boot_lock_fuse_bits_get(Address); +} + +uint8_t BootloaderAPI_ReadLock(void) +{ + return boot_lock_fuse_bits_get(GET_LOCK_BITS); +} + +void BootloaderAPI_WriteLock(const uint8_t LockBits) +{ + boot_lock_bits_set_safe(LockBits); +} + diff --git a/tmk_core/protocol/lufa/LUFA-git/Bootloaders/MassStorage/BootloaderAPI.h b/tmk_core/protocol/lufa/LUFA-git/Bootloaders/MassStorage/BootloaderAPI.h new file mode 100644 index 0000000000..0f0cd70405 --- /dev/null +++ b/tmk_core/protocol/lufa/LUFA-git/Bootloaders/MassStorage/BootloaderAPI.h @@ -0,0 +1,63 @@ +/* + LUFA Library + Copyright (C) Dean Camera, 2014. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2014 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 + * + * Header file for BootloaderAPI.c. + */ + +#ifndef _BOOTLOADER_API_H_ +#define _BOOTLOADER_API_H_ + + /* Includes: */ + #include <avr/io.h> + #include <avr/boot.h> + #include <stdbool.h> + + #include <LUFA/Common/Common.h> + + /* Macros: */ + #if AUX_BOOT_SECTION_SIZE > 0 + #define AUX_BOOT_SECTION __attribute__((section(".boot_aux"))) + #else + #define AUX_BOOT_SECTION + #endif + + /* Function Prototypes: */ + void BootloaderAPI_ErasePage(const uint32_t Address); + void BootloaderAPI_WritePage(const uint32_t Address); + void BootloaderAPI_FillWord(const uint32_t Address, const uint16_t Word); + uint8_t BootloaderAPI_ReadSignature(const uint16_t Address); + uint8_t BootloaderAPI_ReadFuse(const uint16_t Address); + uint8_t BootloaderAPI_ReadLock(void); + void BootloaderAPI_WriteLock(const uint8_t LockBits); + +#endif + diff --git a/tmk_core/protocol/lufa/LUFA-git/Bootloaders/MassStorage/BootloaderAPITable.S b/tmk_core/protocol/lufa/LUFA-git/Bootloaders/MassStorage/BootloaderAPITable.S new file mode 100644 index 0000000000..6844d4b01c --- /dev/null +++ b/tmk_core/protocol/lufa/LUFA-git/Bootloaders/MassStorage/BootloaderAPITable.S @@ -0,0 +1,102 @@ +/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2014.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.lufa-lib.org
+*/
+
+/*
+ Copyright 2014 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.
+*/
+
+#if AUX_BOOT_SECTION_SIZE > 0
+#warning Using a AUX bootloader section in addition to the defined bootloader space (see documentation).
+
+; Trampoline to jump over the AUX bootloader section to the start of the bootloader,
+; on devices where an AUX bootloader section is used.
+.section .boot_aux_trampoline, "ax"
+.global Boot_AUX_Trampoline
+Boot_AUX_Trampoline:
+ jmp BOOT_START_ADDR
+#endif
+
+; Trampolines to actual API implementations if the target address is outside the
+; range of a rjmp instruction (can happen with large bootloader sections)
+.section .apitable_trampolines, "ax"
+.global BootloaderAPI_Trampolines
+BootloaderAPI_Trampolines:
+
+ BootloaderAPI_ErasePage_Trampoline:
+ jmp BootloaderAPI_ErasePage
+ BootloaderAPI_WritePage_Trampoline:
+ jmp BootloaderAPI_WritePage
+ BootloaderAPI_FillWord_Trampoline:
+ jmp BootloaderAPI_FillWord
+ BootloaderAPI_ReadSignature_Trampoline:
+ jmp BootloaderAPI_ReadSignature
+ BootloaderAPI_ReadFuse_Trampoline:
+ jmp BootloaderAPI_ReadFuse
+ BootloaderAPI_ReadLock_Trampoline:
+ jmp BootloaderAPI_ReadLock
+ BootloaderAPI_WriteLock_Trampoline:
+ jmp BootloaderAPI_WriteLock
+ BootloaderAPI_UNUSED1:
+ ret
+ BootloaderAPI_UNUSED2:
+ ret
+ BootloaderAPI_UNUSED3:
+ ret
+ BootloaderAPI_UNUSED4:
+ ret
+ BootloaderAPI_UNUSED5:
+ ret
+
+
+
+; API function jump table
+.section .apitable_jumptable, "ax"
+.global BootloaderAPI_JumpTable
+BootloaderAPI_JumpTable:
+
+ rjmp BootloaderAPI_ErasePage_Trampoline
+ rjmp BootloaderAPI_WritePage_Trampoline
+ rjmp BootloaderAPI_FillWord_Trampoline
+ rjmp BootloaderAPI_ReadSignature_Trampoline
+ rjmp BootloaderAPI_ReadFuse_Trampoline
+ rjmp BootloaderAPI_ReadLock_Trampoline
+ rjmp BootloaderAPI_WriteLock_Trampoline
+ rjmp BootloaderAPI_UNUSED1 ; UNUSED ENTRY 1
+ rjmp BootloaderAPI_UNUSED2 ; UNUSED ENTRY 2
+ rjmp BootloaderAPI_UNUSED3 ; UNUSED ENTRY 3
+ rjmp BootloaderAPI_UNUSED4 ; UNUSED ENTRY 4
+ rjmp BootloaderAPI_UNUSED5 ; UNUSED ENTRY 5
+
+
+
+; Bootloader table signatures and information
+.section .apitable_signatures, "ax"
+.global BootloaderAPI_Signatures
+BootloaderAPI_Signatures:
+
+ .long BOOT_START_ADDR ; Start address of the bootloader
+ .word 0xDF30 ; Signature for the MS class bootloader, V1
+ .word 0xDCFB ; Signature for a LUFA class bootloader
diff --git a/tmk_core/protocol/lufa/LUFA-git/Bootloaders/MassStorage/BootloaderMassStorage.c b/tmk_core/protocol/lufa/LUFA-git/Bootloaders/MassStorage/BootloaderMassStorage.c new file mode 100644 index 0000000000..cfe0cdbf8f --- /dev/null +++ b/tmk_core/protocol/lufa/LUFA-git/Bootloaders/MassStorage/BootloaderMassStorage.c @@ -0,0 +1,238 @@ +/* + LUFA Library + Copyright (C) Dean Camera, 2014. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2014 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(); + #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 + ((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; +} diff --git a/tmk_core/protocol/lufa/LUFA-git/Bootloaders/MassStorage/BootloaderMassStorage.h b/tmk_core/protocol/lufa/LUFA-git/Bootloaders/MassStorage/BootloaderMassStorage.h new file mode 100644 index 0000000000..c1bd004106 --- /dev/null +++ b/tmk_core/protocol/lufa/LUFA-git/Bootloaders/MassStorage/BootloaderMassStorage.h @@ -0,0 +1,99 @@ +/* + LUFA Library + Copyright (C) Dean Camera, 2014. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2014 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 + * + * Header file for BootloaderMassStorage.c. + */ + +#ifndef _BOOTLOADER_MASS_STORAGE_H_ +#define _BOOTLOADER_MASS_STORAGE_H_ + + /* Includes: */ + #include <avr/io.h> + #include <avr/wdt.h> + #include <avr/power.h> + #include <avr/interrupt.h> + #include <string.h> + + #include "Descriptors.h" + #include "Config/AppConfig.h" + + #include "Lib/SCSI.h" + + #include <LUFA/Drivers/Board/LEDs.h> + #include <LUFA/Drivers/USB/USB.h> + #include <LUFA/Platform/Platform.h> + + /* Preprocessor Checks: */ + #if !defined(__OPTIMIZE_SIZE__) + #error This bootloader requires that it be optimized for size, not speed, to fit into the target device. Change optimization settings and try again. + #endif + + /* Macros: */ + /** LED mask for the library LED driver, to indicate that the USB interface is not ready. */ + #define LEDMASK_USB_NOTREADY LEDS_LED1 + + /** LED mask for the library LED driver, to indicate that the USB interface is enumerating. */ + #define LEDMASK_USB_ENUMERATING (LEDS_LED2 | LEDS_LED3) + + /** LED mask for the library LED driver, to indicate that the USB interface is ready. */ + #define LEDMASK_USB_READY (LEDS_LED2 | LEDS_LED4) + + /** LED mask for the library LED driver, to indicate that an error has occurred in the USB interface. */ + #define LEDMASK_USB_ERROR (LEDS_LED1 | LEDS_LED3) + + /** 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; + + void Application_Jump_Check(void) ATTR_INIT_SECTION(3); + + void EVENT_USB_Device_Connect(void) AUX_BOOT_SECTION; + void EVENT_USB_Device_Disconnect(void) AUX_BOOT_SECTION; + void EVENT_USB_Device_ConfigurationChanged(void) AUX_BOOT_SECTION; + void EVENT_USB_Device_ControlRequest(void) AUX_BOOT_SECTION; + + 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 + diff --git a/tmk_core/protocol/lufa/LUFA-git/Bootloaders/MassStorage/BootloaderMassStorage.txt b/tmk_core/protocol/lufa/LUFA-git/Bootloaders/MassStorage/BootloaderMassStorage.txt new file mode 100644 index 0000000000..e094847933 --- /dev/null +++ b/tmk_core/protocol/lufa/LUFA-git/Bootloaders/MassStorage/BootloaderMassStorage.txt @@ -0,0 +1,225 @@ +/** \file + * + * This file contains special DoxyGen information for the generation of the main page and other special + * documentation pages. It is not a project source file. + */ + +/** \mainpage Mass Storage Class USB AVR Bootloader + * + * \section Sec_Compat Demo Compatibility: + * + * The following list indicates what microcontrollers are compatible with this demo. + * + * \li Series 7 USB AVRs (AT90USBxxx7) + * \li Series 6 USB AVRs (AT90USBxxx6) + * \li Series 4 USB AVRs (ATMEGAxxU4) - <i>See \ref SSec_Aux_Space</i> + * \li ATMEGA32U2 - <i>See \ref SSec_Aux_Space</i> + * + * \section Sec_Info USB Information: + * + * The following table gives a rundown of the USB utilization of this demo. + * + * <table> + * <tr> + * <td><b>USB Mode:</b></td> + * <td>Device</td> + * </tr> + * <tr> + * <td><b>USB Class:</b></td> + * <td>Mass Storage Device</td> + * </tr> + * <tr> + * <td><b>USB Subclass:</b></td> + * <td>Bulk-Only Transport</td> + * </tr> + * <tr> + * <td><b>Relevant Standards:</b></td> + * <td>USBIF Mass Storage Standard \n + * USB Bulk-Only Transport Standard \n + * SCSI Primary Commands Specification \n + * SCSI Block Commands Specification</td> + * </tr> + * <tr> + * <td><b>Supported USB Speeds:</b></td> + * <td>Full Speed Mode</td> + * </tr> + * </table> + * + * \section Sec_Description Project Description: + * + * This bootloader enumerates to the host as a Mass Storage device, capable of reading and writing a new binary + * firmware image file, to load firmware onto the AVR. + * + * Out of the box this bootloader builds for the AT90USB1287 with an 8KB bootloader section size, and will fit + * into 6KB of bootloader space. If you wish to alter this size and/or change the AVR model, you will need to + * edit the MCU, FLASH_SIZE_KB and BOOT_SECTION_SIZE_KB values in the accompanying makefile. + * + * When the bootloader is running, the board's LED(s) will flash at regular intervals to distinguish the + * bootloader from the normal user application. + * + * \warning <b>THIS BOOTLOADER IS NOT SECURE.</b> Malicious entities can recover written data, even if the device + * lockbits are set. + * + * \section Sec_Running Running the Bootloader + * + * This bootloader is designed to be started via the HWB mechanism of the USB AVRs; ground the HWB pin (see device + * datasheet) then momentarily ground /RESET to start the bootloader. This assumes the HWBE fuse is set and the BOOTRST + * fuse is cleared. + * + * For board specific exceptions to the above, see below. + * + * \subsection SSec_XPLAIN Atmel Xplain Board + * Ground the USB AVR JTAG's \c TCK pin to ground when powering on the board to start the bootloader. This assumes the + * \c HWBE fuse is cleared and the \c BOOTRST fuse is set as the HWBE pin is not user accessible on this board. + * + * \subsection SSec_Leonardo Arduino Leonardo Board + * Ground \c IO13 when powering the board to start the bootloader. This assumes the \c HWBE fuse is cleared and the + * \c BOOTRST fuse is set as the HWBE pin is not user accessible on this board. + * + * \section Sec_Installation Driver Installation + * + * This bootloader uses the Mass Storage drivers inbuilt into all modern operating systems, thus no additional + * drivers need to be supplied for correct operation. + * + * \section Sec_HostApp Host Controller Application + * + * This bootloader is compatible with all operating systems that support the FAT12 file system format. To reprogram the + * device, overwrite a file stored on the virtual FAT filesystem with a new binary (BIN format) image. Remember to safely + * remove your device from the host using the host OS's ejection APIs, to ensure all data is correctly flushed to the + * bootloader's virtual filesystem and not cached in the OS's file system driver. + * + * The current device firmware can be read from the device by reading a file from the virtual FAT filesystem. + * + * \warning This bootloader is currently <b>incompatible with the Apple MacOS X OS Finder GUI</b>, due to the + * large amount of meta files this OS attempts to write to the disk along with the new binaries. On + * this platform, firmwares must be copied to the disk via the Terminal application only to prevent + * firmware corruption. + * + * \section Sec_API User Application API + * + * Several user application functions for FLASH and other special memory area manipulations are exposed by the bootloader, + * allowing the user application to call into the bootloader at runtime to read and write FLASH data. + * + * By default, the bootloader API jump table is located 32 bytes from the end of the device's FLASH memory, and follows the + * following layout: + * + * \code + * #define BOOTLOADER_API_TABLE_SIZE 32 + * #define BOOTLOADER_API_TABLE_START ((FLASHEND + 1UL) - BOOTLOADER_API_TABLE_SIZE) + * #define BOOTLOADER_API_CALL(Index) (void*)((BOOTLOADER_API_TABLE_START + (Index * 2)) / 2) + * + * void (*BootloaderAPI_ErasePage)(uint32_t Address) = BOOTLOADER_API_CALL(0); + * void (*BootloaderAPI_WritePage)(uint32_t Address) = BOOTLOADER_API_CALL(1); + * void (*BootloaderAPI_FillWord)(uint32_t Address, uint16_t Word) = BOOTLOADER_API_CALL(2); + * uint8_t (*BootloaderAPI_ReadSignature)(uint16_t Address) = BOOTLOADER_API_CALL(3); + * uint8_t (*BootloaderAPI_ReadFuse)(uint16_t Address) = BOOTLOADER_API_CALL(4); + * uint8_t (*BootloaderAPI_ReadLock)(void) = BOOTLOADER_API_CALL(5); + * void (*BootloaderAPI_WriteLock)(uint8_t LockBits) = BOOTLOADER_API_CALL(6); + * + * #define BOOTLOADER_MAGIC_SIGNATURE_START (BOOTLOADER_API_TABLE_START + (BOOTLOADER_API_TABLE_SIZE - 2)) + * #define BOOTLOADER_MAGIC_SIGNATURE 0xDCFB + * + * #define BOOTLOADER_CLASS_SIGNATURE_START (BOOTLOADER_API_TABLE_START + (BOOTLOADER_API_TABLE_SIZE - 4)) + * #define BOOTLOADER_MASS_STORAGE_SIGNATURE 0xDF30 + * + * #define BOOTLOADER_ADDRESS_START (BOOTLOADER_API_TABLE_START + (BOOTLOADER_API_TABLE_SIZE - 8)) + * #define BOOTLOADER_ADDRESS_LENGTH 4 + * \endcode + * + * From the application the API support of the bootloader can be detected by reading the FLASH memory bytes located at address + * \c BOOTLOADER_MAGIC_SIGNATURE_START and comparing them to the value \c BOOTLOADER_MAGIC_SIGNATURE. The class of bootloader + * can be determined by reading the FLASH memory bytes located at address \c BOOTLOADER_CLASS_SIGNATURE_START and comparing them + * to the value \c BOOTLOADER_MASS_STORAGE_SIGNATURE. The start address of the bootloader can be retrieved by reading the bytes + * of FLASH memory starting from address \c BOOTLOADER_ADDRESS_START. + * + * \subsection SSec_Aux_Space Auxiliary Bootloader Section + * To make the bootloader function on smaller devices (those with a physical bootloader section of smaller than 6KB) a second + * section of memory (called the <i>Auxiliary Bootloader Section</i>) is added before the start of the real bootloader section, + * and is filled with a portion of the bootloader code. This allows smaller devices to run the bootloader, at the cost of an + * additional portion of the device's FLASH (the bootloader section size in KB subtracted from the 6KB total size). A small + * trampoline is inserted at the start of the auxiliary section so that the bootloader will run normally in the case of a blank + * application section. + * + * On devices supporting a 8KB bootloader section size, the AUX section is not created in the final binary. + * + * \subsection SSec_API_MemLayout Device Memory Map + * The following illustration indicates the final memory map of the device when loaded with the bootloader. + * + * \verbatim + * +----------------------------+ 0x0000 + * | | + * | | + * | | + * | | + * | | + * | | + * | | + * | | + * | User Application | + * | | + * | | + * | | + * | | + * | | + * | | + * | | + * | | + * +----------------------------+ FLASHEND - BOOT_SECTION_SIZE - BOOT_AUX_SECTION_SIZE + * | Booloader Start Trampoline | + * | (Not User App. Accessible) | + * +----------------------------+ FLASHEND - BOOT_SECTION_SIZE - BOOT_AUX_SECTION_SIZE + 4 + * | | + * | Auxiliary Bootloader | + * | Space for Smaller Devices | + * | (Not User App. Accessible) | + * | | + * +----------------------------+ FLASHEND - BOOT_SECTION_SIZE + * | | + * | Bootloader Application | + * | (Not User App. Accessible) | + * | | + * +----------------------------+ FLASHEND - 96 + * | API Table Trampolines | + * | (Not User App. Accessible) | + * +----------------------------+ FLASHEND - 32 + * | Bootloader API Table | + * | (User App. Accessible) | + * +----------------------------+ FLASHEND - 8 + * | Bootloader ID Constants | + * | (User App. Accessible) | + * +----------------------------+ FLASHEND + * \endverbatim + * + * \section Sec_KnownIssues Known Issues: + * + * \par In some cases, the application is not fully loaded into the device. + * Write-caching on some operating systems may interfere with the normal + * operation of the bootloader. Write caching should be disabled when using the + * Mass Storage bootloader, or the file system synced via an appropriate command + * (such as the OS's normal disk ejection command) before disconnecting the device. + * + * \par After loading an application, it is not run automatically on startup. + * Some USB AVR boards ship with the BOOTRST fuse set, causing the bootloader + * to run automatically when the device is reset. In most cases, the BOOTRST + * fuse should be disabled and the HWBE fuse used instead to run the bootloader + * when needed. + * + * \section Sec_Options Project Options + * + * The following defines can be found in this demo, which can control the demo behaviour when defined, or changed in value. + * + * <table> + * <tr> + * <th><b>Define Name:</b></th> + * <th><b>Location:</b></th> + * |