020b576b |
1 | /* |
2 | * Copyright (c) 2016, Ian Sutton <ian@kremlin.cc> |
3 | * |
4 | * Permission to use, copy, modify, and/or distribute this software for |
5 | * any purpose with or without fee is hereby granted, provided that the |
6 | * above copyright notice and this permission notice appear in all |
7 | * copies. |
8 | * |
9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL |
10 | * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED |
11 | * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE |
12 | * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
13 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
14 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
15 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
16 | * PERFORMANCE OF THIS SOFTWARE. |
17 | */ |
18 | |
19 | .origin 0 |
20 | .entrypoint START /* used by debugger only */ |
21 | |
22 | #define PRU0_R31_VEC_VALID (1<<5) |
23 | #define SIGNUM 3 /* corresponds to PRU_EVTOUT_0 */ |
24 | |
25 | #define DELAY_SECONDS 5 |
26 | #define CLOCK 200000000 |
27 | #define CLOCKS_PER_LOOP 2 |
28 | #define DELAYCOUNT DELAY_SECONDS * CLOCK / CLOCKS_PER_LOOP |
29 | |
30 | START: |
31 | MOV r1, DELAYCOUNT |
32 | |
33 | DELAY: |
34 | SUB r1, r1, 1 |
35 | QBNE DELAY, r1, 0 |
36 | |
37 | /* intr */ |
38 | MOV R31.b0, PRU0_R31_VEC_VALID | SIGNUM |
39 | HALT |
40 | |