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| Source at commit d278ebb4ad2cb58e226f49eb96e7525f36e7e1c2 created 10 years 11 months ago. By Werner Almesberger, tornado/led/: update schematics for new power distribution | |
|---|---|
| 1 | /* |
| 2 | * fw/sample.c - Acceleration sensor sample protocol |
| 3 | * |
| 4 | * Written 2012 by Werner Almesberger |
| 5 | * Copyright 2012 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/interrupt.h> |
| 19 | |
| 20 | #include "rf.h" |
| 21 | #include "sweep.h" |
| 22 | #include "accel.h" |
| 23 | #include "proto.h" |
| 24 | #include "dispatch.h" |
| 25 | |
| 26 | #include "io.h" |
| 27 | |
| 28 | /* @@@ keep it small for now - we're running out of RAM :-( */ |
| 29 | //#define MAX_PACKET 120 /* <- MAX_PSDU -3 (hdr) -2 (CRC) */ |
| 30 | #define MAX_PACKET 50 /* <- MAX_PSDU -3 (hdr) -2 (CRC) */ |
| 31 | |
| 32 | static uint8_t buf[MAX_PACKET+3] = { SAMPLES, 0, 0 }; |
| 33 | static uint16_t *p; |
| 34 | static bool expect_x; |
| 35 | |
| 36 | |
| 37 | static void handler(bool x, uint16_t v) |
| 38 | { |
| 39 | uint32_t t; |
| 40 | |
| 41 | if (x != expect_x) |
| 42 | return; |
| 43 | t = uptime_irq(); |
| 44 | if (p == (uint16_t *) (buf+3)) |
| 45 | *p++ = t >> 16; |
| 46 | *p++ = t; |
| 47 | *p++ = v; |
| 48 | expect_x = !expect_x; |
| 49 | |
| 50 | if (x) |
| 51 | return; |
| 52 | if ((uint8_t *) (p+4) <= buf+MAX_PACKET) |
| 53 | return; |
| 54 | |
| 55 | rf_send(buf, (uint8_t *) p-buf); |
| 56 | buf[1]++; |
| 57 | p = (uint16_t *) (buf+3); |
| 58 | } |
| 59 | |
| 60 | |
| 61 | static bool sample_first(uint8_t limit, const uint8_t *payload) |
| 62 | { |
| 63 | if (payload[0]) { |
| 64 | buf[1] = 0; |
| 65 | cli(); |
| 66 | sample = handler; |
| 67 | p = (uint16_t *) (buf+3); |
| 68 | expect_x = 1; |
| 69 | sei(); |
| 70 | } else { |
| 71 | cli(); |
| 72 | sample = NULL; |
| 73 | sei(); |
| 74 | } |
| 75 | return 1; |
| 76 | } |
| 77 | |
| 78 | |
| 79 | static bool sample_more(uint8_t seq, uint8_t limit, const uint8_t *payload) |
| 80 | { |
| 81 | return 0; |
| 82 | } |
| 83 | |
| 84 | |
| 85 | struct handler sample_handler = { |
| 86 | .type = SAMPLE, |
| 87 | .first = sample_first, |
| 88 | .more = sample_more, |
| 89 | }; |
| 90 | |
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tornado-v1
