From e65575d4a5f03a90adfa9850cb71a5d0448098cd Mon Sep 17 00:00:00 2001 From: tmk Date: Thu, 22 Sep 2011 16:56:36 +0900 Subject: Refactored bootloader jumping. Added USBaspLoader support. --- vusb/bootloader_usbasp.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 vusb/bootloader_usbasp.c (limited to 'vusb') diff --git a/vusb/bootloader_usbasp.c b/vusb/bootloader_usbasp.c new file mode 100644 index 0000000000..6ec99cbf2d --- /dev/null +++ b/vusb/bootloader_usbasp.c @@ -0,0 +1,47 @@ +/* +Copyright 2011 Jun Wako + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ + +#include +#include +#include "bootloader.h" + + +void bootloader_jump(void) { + cli(); + // This makes custom USBasploader come up. + MCUSR = 0; + + // ATmega168PA + // initialize ports + PORTB = 0; PORTC= 0; PORTD = 0; + DDRB = 0; DDRC= 0; DDRD = 0; + + // disable interrupts + EIMSK = 0; EECR = 0; SPCR = 0; + ACSR = 0; SPMCSR = 0; WDTCSR = 0; PCICR = 0; + TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; + ADCSRA = 0; TWCR = 0; UCSR0B = 0; + + // Boot Loader Section Start Address: + // BOOTSZ Size Address + // (lock bit) (word) (word) (byte) + // '11' 128 0x1F80 0x3F00 + // '10' 256 0x1F00 0x3E00 + // '01' 512 0x1E00 0x3C00 + // '00' 1024 0x1C00 0x3800 + asm volatile("jmp 0x3800"); +} -- cgit v1.2.3