mirror of
git://projects.qi-hardware.com/ben-wpan.git
synced 2024-11-23 00:39:42 +02:00
86 lines
1.5 KiB
C
86 lines
1.5 KiB
C
/*
|
|
* fw/flash.c - Board-specific flash functions
|
|
*
|
|
* Written 2011, 2013 by Werner Almesberger
|
|
* Copyright 2011, 2013 Werner Almesberger
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
|
|
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
|
|
#include <avr/boot.h>
|
|
#include <avr/pgmspace.h>
|
|
|
|
#include "dfu.h"
|
|
#include "board.h"
|
|
|
|
|
|
static uint32_t payload;
|
|
|
|
|
|
void flash_start(void)
|
|
{
|
|
payload = 0;
|
|
}
|
|
|
|
|
|
bool flash_can_write(uint16_t size)
|
|
{
|
|
return payload+size <= BOOT_ADDR;
|
|
}
|
|
|
|
|
|
void flash_write(const uint8_t *buf, uint16_t size)
|
|
{
|
|
static uint8_t last;
|
|
const uint8_t *p;
|
|
|
|
for (p = buf; p != buf+size; p++) {
|
|
if (!(payload & (SPM_PAGESIZE-1))) {
|
|
boot_page_erase(payload);
|
|
boot_spm_busy_wait();
|
|
}
|
|
|
|
if (payload & 1)
|
|
boot_page_fill(payload, last | (*p << 8));
|
|
else
|
|
last = *p;
|
|
payload++;
|
|
|
|
if (!(payload & (SPM_PAGESIZE-1))) {
|
|
boot_page_write(payload-SPM_PAGESIZE);
|
|
boot_spm_busy_wait();
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void flash_end_write(void)
|
|
{
|
|
if (payload & (SPM_PAGESIZE-1)) {
|
|
boot_page_write(payload & ~(SPM_PAGESIZE-1));
|
|
boot_spm_busy_wait();
|
|
}
|
|
boot_rww_enable();
|
|
}
|
|
|
|
|
|
uint16_t flash_read(uint8_t *buf, uint16_t size)
|
|
{
|
|
uint16_t got = 0;
|
|
|
|
while (size && payload != (uint32_t) FLASHEND+1) {
|
|
*buf++ = pgm_read_byte(payload);
|
|
payload++;
|
|
size--;
|
|
got++;
|
|
}
|
|
return got;
|
|
}
|