4102512579
- Heavily modified, not compatible with McHCK images - Uses 4k of Flash (rather than 3k) - LED turns on when in firmware flash mode - Changed the USB IDs - Added CMake build system - Updated linker script to be closer to what is used for the rest of the projects - Removed a lot of unnecessary code - Added a license header to each file (using the same license as the McHCK had) - Updated the USB Vendor, Product and Serial strings - Using the Kiibohd initialization sequence rather than the McHCK one - Using Kiibohd interrupt vector table and other misc mk20dx setup
97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
/* Copyright (c) 2011,2012 Simon Schubert <2@0x2c.org>.
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* Modifications by Jacob Alexander 2014 <haata@kiibohd.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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// ----- Local Includes -----
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#include "mchck.h"
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#include "dfu.desc.h"
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// ----- Variables -----
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/**
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* Unfortunately we can't DMA directly to FlexRAM, so we'll have to stage here.
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*/
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static char staging[FLASH_SECTOR_SIZE];
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// ----- Functions -----
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static enum dfu_status setup_write(size_t off, size_t len, void **buf)
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{
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static int last = 0;
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if (len > sizeof(staging))
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return (DFU_STATUS_errADDRESS);
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// We only allow the last write to be less than one sector size.
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if (off == 0)
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last = 0;
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if (last && len != 0)
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return (DFU_STATUS_errADDRESS);
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if (len != FLASH_SECTOR_SIZE) {
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last = 1;
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memset(staging, 0xff, sizeof(staging));
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}
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*buf = staging;
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return (DFU_STATUS_OK);
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}
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static enum dfu_status finish_write( void *buf, size_t off, size_t len )
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{
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void *target;
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if (len == 0)
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return (DFU_STATUS_OK);
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target = flash_get_staging_area(off + (uintptr_t)&_app_rom, FLASH_SECTOR_SIZE);
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if (!target)
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return (DFU_STATUS_errADDRESS);
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memcpy(target, buf, len);
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if (flash_program_sector(off + (uintptr_t)&_app_rom, FLASH_SECTOR_SIZE) != 0)
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return (DFU_STATUS_errADDRESS);
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return (DFU_STATUS_OK);
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}
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static struct dfu_ctx dfu_ctx;
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void init_usb_bootloader( int config )
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{
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dfu_init(setup_write, finish_write, &dfu_ctx);
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}
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void main()
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{
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// Enabling LED to indicate we are in the bootloader
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GPIOA_PDDR |= (1<<19);
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// Setup pin - A19 - See Lib/pin_map.mchck for more details on pins
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PORTA_PCR19 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
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GPIOA_PSOR |= (1<<19);
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flash_prepare_flashing();
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usb_init( &dfu_device );
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for (;;)
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{
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usb_poll();
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}
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}
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