IEEE 802.15.4 subsystem
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Source at commit c6e776e714b6cb8c7a5ea1f2767ee6bab682298e created 7 years 11 months ago. By Stefan Schmidt, atusb: fw: make the ifdefs in mac handling transceiver specific and not board specific | |
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1 | /* |
2 | * fw/boot.c - DFU boot loader for ATUSB |
3 | * |
4 | * Written 2008-2011 by Werner Almesberger |
5 | * Copyright 2008-2011 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 <stdint.h> |
15 | |
16 | #include <avr/io.h> |
17 | #include <avr/interrupt.h> |
18 | #include <avr/pgmspace.h> |
19 | |
20 | #define F_CPU 8000000UL |
21 | #include <util/delay.h> |
22 | |
23 | #include "usb.h" |
24 | #include "dfu.h" |
25 | |
26 | #include "board.h" |
27 | #include "spi.h" |
28 | #include "atusb/ep0.h" |
29 | |
30 | |
31 | #define MS_TO_LOOPS(ms) ((uint32_t) (ms)*335) |
32 | |
33 | |
34 | static void (*run_payload)(void) = 0; |
35 | |
36 | |
37 | int main(void) |
38 | { |
39 | /* |
40 | * pgm_read_byte gets cached and there doesn't seem to be any other |
41 | * way to dissuade gcc from doing this. |
42 | */ |
43 | volatile int zero = 0; |
44 | uint32_t loop = 0; |
45 | |
46 | board_init(); |
47 | reset_rf(); |
48 | |
49 | /* now we should be at 8 MHz */ |
50 | |
51 | usb_init(); |
52 | dfu_init(); |
53 | |
54 | /* move interrupt vectors to the boot loader */ |
55 | MCUCR = 1 << IVCE; |
56 | MCUCR = 1 << IVSEL; |
57 | |
58 | sei(); |
59 | |
60 | led(1); |
61 | |
62 | while (loop != MS_TO_LOOPS(2500)) { |
63 | if (dfu.state == dfuIDLE && pgm_read_byte(zero) != 0xff) |
64 | loop++; |
65 | else |
66 | loop = 0; |
67 | } |
68 | |
69 | led(0); |
70 | |
71 | cli(); |
72 | |
73 | usb_reset(); |
74 | run_payload(); |
75 | |
76 | while (1); /* not reached */ |
77 | } |
78 |