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ben-wpan/atusb/fw/board.c

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/*
* fw/board.c - Board-specific functions (for boot loader and application)
*
* 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/io.h>
#include <avr/interrupt.h>
#include <avr/boot.h>
#define F_CPU 8000000UL
#include <util/delay.h>
#include "usb.h"
#include "at86rf230.h"
#include "board.h"
#include "spi.h"
uint8_t board_sernum[42] = { 42, USB_DT_STRING };
void reset_rf(void)
{
/* set up all the outputs; default port value is 0 */
DDRB = 0;
DDRC = 0;
DDRD = 0;
PORTB = 0;
PORTC = 0;
PORTD = 0;
OUT(LED);
OUT(nRST_RF); /* this also resets the transceiver */
OUT(SLP_TR);
spi_init();
/* AT86RF231 data sheet, 12.4.13, reset pulse width: 625 ns (min) */
CLR(nRST_RF);
_delay_us(2);
SET(nRST_RF);
/* 12.4.14: SPI access latency after reset: 625 ns (min) */
_delay_us(2);
/* we must restore TRX_CTRL_0 after each reset (9.6.4) */
set_clkm();
}
void led(bool on)
{
if (on)
SET(LED);
else
CLR(LED);
}
void panic(void)
{
cli();
while (1) {
SET(LED);
_delay_ms(100);
CLR(LED);
_delay_ms(100);
}
}
static char hex(uint8_t nibble)
{
return nibble < 10 ? '0'+nibble : 'a'+nibble-10;
}
void get_sernum(void)
{
uint8_t sig;
uint8_t i;
for (i = 0; i != 10; i++) {
sig = boot_signature_byte_get(i+0xe);
board_sernum[(i << 2)+2] = hex(sig >> 4);
board_sernum[(i << 2)+4] = hex(sig & 0xf);
}
}