IEEE 802.15.4 subsystem
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| Source at commit 805db6ebf5d80692158acadf88e239da9d3e67af created 6 years 3 months ago. By Stefan Schmidt, fw/atusb: add extra steps needed for HULUSB in README | |
|---|---|
| 1 | /* |
| 2 | * fw/board.c - Board-specific functions (for boot loader and application) |
| 3 | * |
| 4 | * Written 2011, 2013 by Werner Almesberger |
| 5 | * Copyright 2011, 2013 Werner Almesberger |
| 6 | * |
| 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. |
| 11 | */ |
| 12 | |
| 13 | |
| 14 | #include <stdbool.h> |
| 15 | #include <stdint.h> |
| 16 | |
| 17 | #include <avr/io.h> |
| 18 | #include <avr/interrupt.h> |
| 19 | #include <avr/boot.h> |
| 20 | |
| 21 | #define F_CPU 8000000UL |
| 22 | #include <util/delay.h> |
| 23 | |
| 24 | #include "usb.h" |
| 25 | #include "at86rf230.h" |
| 26 | #include "board.h" |
| 27 | #include "spi.h" |
| 28 | |
| 29 | |
| 30 | uint8_t board_sernum[42] = { 42, USB_DT_STRING }; |
| 31 | |
| 32 | /* ----- Register access --------------------------------------------------- */ |
| 33 | |
| 34 | void change_state(uint8_t new) |
| 35 | { |
| 36 | while ((reg_read(REG_TRX_STATUS) & TRX_STATUS_MASK) == |
| 37 | TRX_STATUS_TRANSITION); |
| 38 | reg_write(REG_TRX_STATE, new); |
| 39 | } |
| 40 | |
| 41 | |
| 42 | uint8_t reg_read(uint8_t reg) |
| 43 | { |
| 44 | uint8_t value; |
| 45 | |
| 46 | spi_begin(); |
| 47 | spi_send(AT86RF230_REG_READ | reg); |
| 48 | value = spi_recv(); |
| 49 | spi_end(); |
| 50 | |
| 51 | return value; |
| 52 | } |
| 53 | |
| 54 | |
| 55 | uint8_t subreg_read(uint8_t address, uint8_t mask, uint8_t position) |
| 56 | { |
| 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. */ |
| 61 | |
| 62 | return register_value; |
| 63 | } |
| 64 | |
| 65 | |
| 66 | void reg_write(uint8_t reg, uint8_t value) |
| 67 | { |
| 68 | spi_begin(); |
| 69 | spi_send(AT86RF230_REG_WRITE | reg); |
| 70 | spi_send(value); |
| 71 | spi_end(); |
| 72 | } |
| 73 | |
| 74 | |
| 75 | void subreg_write(uint8_t address, uint8_t mask, uint8_t position, uint8_t value) |
| 76 | { |
| 77 | /* Read current register value and mask area outside the subregister. */ |
| 78 | uint8_t register_value = reg_read(address); |
| 79 | register_value &= ~mask; |
| 80 | |
| 81 | /* Start preparing the new subregister value. shift in place and mask. */ |
| 82 | value <<= position; |
| 83 | value &= mask; |
| 84 | |
| 85 | value |= register_value; /* Set the new subregister value. */ |
| 86 | |
| 87 | /* Write the modified register value. */ |
| 88 | reg_write(address, value); |
| 89 | } |
| 90 | |
| 91 | |
| 92 | void panic(void) |
| 93 | { |
| 94 | cli(); |
| 95 | while (1) { |
| 96 | SET(LED); |
| 97 | _delay_ms(100); |
| 98 | CLR(LED); |
| 99 | _delay_ms(100); |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | |
| 104 | static char hex(uint8_t nibble) |
| 105 | { |
| 106 | return nibble < 10 ? '0'+nibble : 'a'+nibble-10; |
| 107 | } |
| 108 | |
| 109 | |
| 110 | void get_sernum(void) |
| 111 | { |
| 112 | uint8_t sig; |
| 113 | uint8_t i; |
| 114 | |
| 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); |
| 119 | } |
| 120 | } |
| 121 | |
