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controller/Bootloader/main.c
Jacob Alexander 4102512579 Adding McHCK DFU Bootloader
- 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
2014-08-15 10:53:43 -07:00

97 lines
2.6 KiB
C

/* Copyright (c) 2011,2012 Simon Schubert <2@0x2c.org>.
* Modifications by Jacob Alexander 2014 <haata@kiibohd.com>
*
* 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 3 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 <http://www.gnu.org/licenses/>.
*/
// ----- Local Includes -----
#include "mchck.h"
#include "dfu.desc.h"
// ----- Variables -----
/**
* Unfortunately we can't DMA directly to FlexRAM, so we'll have to stage here.
*/
static char staging[FLASH_SECTOR_SIZE];
// ----- Functions -----
static enum dfu_status setup_write(size_t off, size_t len, void **buf)
{
static int last = 0;
if (len > sizeof(staging))
return (DFU_STATUS_errADDRESS);
// We only allow the last write to be less than one sector size.
if (off == 0)
last = 0;
if (last && len != 0)
return (DFU_STATUS_errADDRESS);
if (len != FLASH_SECTOR_SIZE) {
last = 1;
memset(staging, 0xff, sizeof(staging));
}
*buf = staging;
return (DFU_STATUS_OK);
}
static enum dfu_status finish_write( void *buf, size_t off, size_t len )
{
void *target;
if (len == 0)
return (DFU_STATUS_OK);
target = flash_get_staging_area(off + (uintptr_t)&_app_rom, FLASH_SECTOR_SIZE);
if (!target)
return (DFU_STATUS_errADDRESS);
memcpy(target, buf, len);
if (flash_program_sector(off + (uintptr_t)&_app_rom, FLASH_SECTOR_SIZE) != 0)
return (DFU_STATUS_errADDRESS);
return (DFU_STATUS_OK);
}
static struct dfu_ctx dfu_ctx;
void init_usb_bootloader( int config )
{
dfu_init(setup_write, finish_write, &dfu_ctx);
}
void main()
{
// Enabling LED to indicate we are in the bootloader
GPIOA_PDDR |= (1<<19);
// Setup pin - A19 - See Lib/pin_map.mchck for more details on pins
PORTA_PCR19 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
GPIOA_PSOR |= (1<<19);
flash_prepare_flashing();
usb_init( &dfu_device );
for (;;)
{
usb_poll();
}
}