2 * fw/board.c - Board-specific functions (for boot loader and application)
4 * Written 2011, 2013 by Werner Almesberger
5 * Copyright 2011, 2013 Werner Almesberger
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
18 #include <avr/interrupt.h>
21 #define F_CPU 8000000UL
22 #include <util/delay.h>
25 #include "at86rf230.h"
30 uint8_t board_sernum[42] = { 42, USB_DT_STRING };
32 /* ----- Register access --------------------------------------------------- */
34 void change_state(uint8_t new)
36 while ((reg_read(REG_TRX_STATUS) & TRX_STATUS_MASK) ==
37 TRX_STATUS_TRANSITION);
38 reg_write(REG_TRX_STATE, new);
42 uint8_t reg_read(uint8_t reg)
47 spi_send(AT86RF230_REG_READ | reg);
55 uint8_t subreg_read(uint8_t address, uint8_t mask, uint8_t position)
57 /* Read current register value and mask out subregister. */
58 uint8_t register_value = reg_read(address);
59 register_value &= mask;
60 register_value >>= position; /* Align subregister value. */
62 return register_value;
66 void reg_write(uint8_t reg, uint8_t value)
69 spi_send(AT86RF230_REG_WRITE | reg);
75 void subreg_write(uint8_t address, uint8_t mask, uint8_t position, uint8_t value)
77 /* Read current register value and mask area outside the subregister. */
78 uint8_t register_value = reg_read(address);
79 register_value &= ~mask;
81 /* Start preparing the new subregister value. shift in place and mask. */
85 value |= register_value; /* Set the new subregister value. */
87 /* Write the modified register value. */
88 reg_write(address, value);
104 static char hex(uint8_t nibble)
106 return nibble < 10 ? '0'+nibble : 'a'+nibble-10;
110 void get_sernum(void)
115 for (i = 0; i != 10; i++) {
116 sig = boot_signature_byte_get(i+0xe);
117 board_sernum[(i << 2)+2] = hex(sig >> 4);
118 board_sernum[(i << 2)+4] = hex(sig & 0xf);