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| author | Martino Facchin <m.facchin@arduino.cc> | 2016-04-06 16:33:14 +0200 |
|---|---|---|
| committer | Martino Facchin <m.facchin@arduino.cc> | 2016-04-06 17:41:06 +0200 |
| commit | 5e194bd8efe8dcd2fb6eaa13cec1a2a642c5254a (patch) | |
| tree | f34c3a6aad5f9e3b43e121948bfa3563c1dd3495 /variants/leonardo | |
| parent | 71b87bf26bc7b485dc1c111603fd09327c1b6c53 (diff) | |
[AVR] Discover newer bootloader at runtime
Replaces #4280, only checks for the bootloader once
Tested with Hoodloader2, should work with every LUFA-derived bootloader released after 2014 (.apitable_signatures section must be placed at end of the flash)
BootloaderAPITable.S :
.global BootloaderAPI_Signatures
BootloaderAPI_Signatures:
.long BOOT_START_ADDR ; Start address of the bootloader
.word 0xDF00 ; Signature for the CDC class bootloader
.word 0xDCFB ; Signature for a LUFA class bootloader
makefile:
BOOT_API_LD_FLAGS += $(call BOOT_SECTION_LD_FLAG, .apitable_signatures, BootloaderAPI_Signatures, 8)
Diffstat (limited to 'variants/leonardo')
| -rw-r--r-- | variants/leonardo/pins_arduino.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/variants/leonardo/pins_arduino.h b/variants/leonardo/pins_arduino.h index 6027223..7e0f669 100644 --- a/variants/leonardo/pins_arduino.h +++ b/variants/leonardo/pins_arduino.h @@ -366,4 +366,22 @@ const uint8_t PROGMEM analog_pin_to_channel_PGM[] = { // Alias SerialUSB to Serial #define SerialUSB SERIAL_PORT_USBVIRTUAL +// Bootloader related fields +// Old Caterian bootloader places the MAGIC key into unsafe RAM locations (it can be rewritten +// by the running sketch before to actual reboot). +// Newer bootloaders, recognizable by the LUFA "signature" at the end of the flash, can handle both +// the usafe and the safe location. Check once (in USBCore.cpp) if the bootloader in new, then set the global +// _updatedLUFAbootloader variable to true/false and place the magic key consequently +#ifndef MAGIC_KEY +#define MAGIC_KEY 0x7777 +#endif + +#ifndef MAGIC_KEY_POS +#define MAGIC_KEY_POS 0x0800 +#endif + +#ifndef NEW_LUFA_SIGNATURE +#define NEW_LUFA_SIGNATURE 0xDCFB +#endif + #endif /* Pins_Arduino_h */ |