IEEE 802.15.4 subsystem
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Source at commit 9c64024af55259eb27fe2d86aa8e26257c996342 created 7 years 4 months ago. By Stefan Schmidt, atusb/Makefile: add missing atusb back layer to upload target | |
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1 | /* |
2 | * fw/board_app.c - Board-specific functions (for the 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 <stddef.h> |
15 | #include <stdbool.h> |
16 | #include <stdint.h> |
17 | |
18 | #include <avr/io.h> |
19 | #include <avr/interrupt.h> |
20 | |
21 | #define F_CPU 8000000UL |
22 | #include <util/delay.h> |
23 | |
24 | #include "usb.h" |
25 | #include "at86rf230.h" |
26 | #include "spi.h" |
27 | #include "mac.h" |
28 | #include "board.h" |
29 | |
30 | |
31 | static volatile uint32_t timer_h = 0; /* 2^(16+32) / 8 MHz = ~1.1 years */ |
32 | |
33 | |
34 | void reset_cpu(void) |
35 | { |
36 | WDTCSR = 1 << WDE; |
37 | } |
38 | |
39 | |
40 | uint8_t read_irq(void) |
41 | { |
42 | return PIN(IRQ_RF); |
43 | } |
44 | |
45 | |
46 | void slp_tr(void) |
47 | { |
48 | SET(SLP_TR); |
49 | CLR(SLP_TR); |
50 | } |
51 | |
52 | |
53 | ISR(TIMER1_OVF_vect) |
54 | { |
55 | timer_h++; |
56 | } |
57 | |
58 | |
59 | uint64_t timer_read(void) |
60 | { |
61 | uint32_t high; |
62 | uint8_t low, mid; |
63 | |
64 | do { |
65 | if (TIFR1 & (1 << TOV1)) { |
66 | TIFR1 = 1 << TOV1; |
67 | timer_h++; |
68 | } |
69 | high = timer_h; |
70 | low = TCNT1L; |
71 | mid = TCNT1H; |
72 | } |
73 | while (TIFR1 & (1 << TOV1)); |
74 | |
75 | /* |
76 | * We need all these casts because the intermediate results are handled |
77 | * as if they were signed and thus get sign-expanded. Sounds wrong-ish. |
78 | */ |
79 | return (uint64_t) high << 16 | (uint64_t) mid << 8 | (uint64_t) low; |
80 | } |
81 | |
82 | |
83 | void timer_init(void) |
84 | { |
85 | /* configure timer 1 as a free-running CLK counter */ |
86 | |
87 | TCCR1A = 0; |
88 | TCCR1B = 1 << CS10; |
89 | |
90 | /* enable timer overflow interrupt */ |
91 | |
92 | TIMSK1 = 1 << TOIE1; |
93 | } |
94 | |
95 | |
96 | bool gpio(uint8_t port, uint8_t data, uint8_t dir, uint8_t mask, uint8_t *res) |
97 | { |
98 | EIMSK = 0; /* recover INT_RF to ATUSB_GPIO_CLEANUP or an MCU reset */ |
99 | |
100 | switch (port) { |
101 | case 1: |
102 | DDRB = (DDRB & ~mask) | dir; |
103 | PORTB = (PORTB & ~mask) | data; |
104 | break; |
105 | case 2: |
106 | DDRC = (DDRC & ~mask) | dir; |
107 | PORTC = (PORTC & ~mask) | data; |
108 | break; |
109 | case 3: |
110 | DDRD = (DDRD & ~mask) | dir; |
111 | PORTD = (PORTD & ~mask) | data; |
112 | break; |
113 | default: |
114 | return 0; |
115 | } |
116 | |
117 | /* disable the UART so that we can meddle with these pins as well. */ |
118 | spi_off(); |
119 | _delay_ms(1); |
120 | |
121 | switch (port) { |
122 | case 1: |
123 | res[0] = PINB; |
124 | res[1] = PORTB; |
125 | res[2] = DDRB; |
126 | break; |
127 | case 2: |
128 | res[0] = PINC; |
129 | res[1] = PORTC; |
130 | res[2] = DDRC; |
131 | break; |
132 | case 3: |
133 | res[0] = PIND; |
134 | res[1] = PORTD; |
135 | res[2] = DDRD; |
136 | break; |
137 | } |
138 | |
139 | return 1; |
140 | } |
141 | |
142 | |
143 | void gpio_cleanup(void) |
144 | { |
145 | EIMSK = 1 << 0; |
146 | } |
147 | |
148 | |
149 | static void done(void *user) |
150 | { |
151 | led(0); |
152 | } |
153 | |
154 | |
155 | uint8_t irq_serial; |
156 | |
157 | #ifdef ATUSB |
158 | ISR(INT0_vect) |
159 | #endif |
160 | #ifdef RZUSB |
161 | ISR(TIMER1_CAPT_vect) |
162 | #endif |
163 | { |
164 | if (mac_irq) { |
165 | if (mac_irq()) |
166 | return; |
167 | } |
168 | if (eps[1].state == EP_IDLE) { |
169 | led(1); |
170 | irq_serial = (irq_serial+1) | 0x80; |
171 | usb_send(&eps[1], &irq_serial, 1, done, NULL); |
172 | } |
173 | } |
174 |