diff options
| author | tmk <nobody@nowhere> | 2014-06-16 11:12:45 +0900 |
|---|---|---|
| committer | tmk <nobody@nowhere> | 2014-07-30 14:07:43 +0900 |
| commit | 867f115bee190515aa195dc3e58f1c381ea9695b (patch) | |
| tree | a738787299cbac2fbaf26e586393f4d4170e8775 /common/timer.c | |
| parent | f15b2691c92e1d9b3c0e59363c803ec540303f37 (diff) | |
| download | qmk_firmware-867f115bee190515aa195dc3e58f1c381ea9695b.tar.gz qmk_firmware-867f115bee190515aa195dc3e58f1c381ea9695b.zip | |
Port timer to mbed
Diffstat (limited to 'common/timer.c')
| -rw-r--r-- | common/timer.c | 116 |
1 files changed, 0 insertions, 116 deletions
diff --git a/common/timer.c b/common/timer.c deleted file mode 100644 index e0dec6cef..000000000 --- a/common/timer.c +++ /dev/null | |||
| @@ -1,116 +0,0 @@ | |||
| 1 | /* | ||
| 2 | Copyright 2011 Jun Wako <wakojun@gmail.com> | ||
| 3 | |||
| 4 | This program is free software: you can redistribute it and/or modify | ||
| 5 | it under the terms of the GNU General Public License as published by | ||
| 6 | the Free Software Foundation, either version 2 of the License, or | ||
| 7 | (at your option) any later version. | ||
| 8 | |||
| 9 | This program is distributed in the hope that it will be useful, | ||
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 12 | GNU General Public License for more details. | ||
| 13 | |||
| 14 | You should have received a copy of the GNU General Public License | ||
| 15 | along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| 16 | */ | ||
| 17 | |||
| 18 | #include <avr/io.h> | ||
| 19 | #include <avr/interrupt.h> | ||
| 20 | #include <stdint.h> | ||
| 21 | #include "timer.h" | ||
| 22 | |||
| 23 | |||
| 24 | // counter resolution 1ms | ||
| 25 | // NOTE: union { uint32_t timer32; struct { uint16_t dummy; uint16_t timer16; }} | ||
| 26 | volatile uint32_t timer_count = 0; | ||
| 27 | |||
| 28 | void timer_init(void) | ||
| 29 | { | ||
| 30 | // Timer0 CTC mode | ||
| 31 | TCCR0A = 0x02; | ||
| 32 | |||
| 33 | #if TIMER_PRESCALER == 1 | ||
| 34 | TCCR0B = 0x01; | ||
| 35 | #elif TIMER_PRESCALER == 8 | ||
| 36 | TCCR0B = 0x02; | ||
| 37 | #elif TIMER_PRESCALER == 64 | ||
| 38 | TCCR0B = 0x03; | ||
| 39 | #elif TIMER_PRESCALER == 256 | ||
| 40 | TCCR0B = 0x04; | ||
| 41 | #elif TIMER_PRESCALER == 1024 | ||
| 42 | TCCR0B = 0x05; | ||
| 43 | #else | ||
| 44 | # error "Timer prescaler value is NOT vaild." | ||
| 45 | #endif | ||
| 46 | |||
| 47 | OCR0A = TIMER_RAW_TOP; | ||
| 48 | TIMSK0 = (1<<OCIE0A); | ||
| 49 | } | ||
| 50 | |||
| 51 | inline | ||
| 52 | void timer_clear(void) | ||
| 53 | { | ||
| 54 | uint8_t sreg = SREG; | ||
| 55 | cli(); | ||
| 56 | timer_count = 0; | ||
| 57 | SREG = sreg; | ||
| 58 | } | ||
| 59 | |||
| 60 | inline | ||
| 61 | uint16_t timer_read(void) | ||
| 62 | { | ||
| 63 | uint32_t t; | ||
| 64 | |||
| 65 | uint8_t sreg = SREG; | ||
| 66 | cli(); | ||
| 67 | t = timer_count; | ||
| 68 | SREG = sreg; | ||
| 69 | |||
| 70 | return (t & 0xFFFF); | ||
| 71 | } | ||
| 72 | |||
| 73 | inline | ||
| 74 | uint32_t timer_read32(void) | ||
| 75 | { | ||
| 76 | uint32_t t; | ||
| 77 | |||
| 78 | uint8_t sreg = SREG; | ||
| 79 | cli(); | ||
| 80 | t = timer_count; | ||
| 81 | SREG = sreg; | ||
| 82 | |||
| 83 | return t; | ||
| 84 | } | ||
| 85 | |||
| 86 | inline | ||
| 87 | uint16_t timer_elapsed(uint16_t last) | ||
| 88 | { | ||
| 89 | uint32_t t; | ||
| 90 | |||
| 91 | uint8_t sreg = SREG; | ||
| 92 | cli(); | ||
| 93 | t = timer_count; | ||
| 94 | SREG = sreg; | ||
| 95 | |||
| 96 | return TIMER_DIFF_16((t & 0xFFFF), last); | ||
| 97 | } | ||
| 98 | |||
| 99 | inline | ||
| 100 | uint32_t timer_elapsed32(uint32_t last) | ||
| 101 | { | ||
| 102 | uint32_t t; | ||
| 103 | |||
| 104 | uint8_t sreg = SREG; | ||
| 105 | cli(); | ||
| 106 | t = timer_count; | ||
| 107 | SREG = sreg; | ||
| 108 | |||
| 109 | return TIMER_DIFF_32(t, last); | ||
| 110 | } | ||
| 111 | |||
| 112 | // excecuted once per 1ms.(excess for just timer count?) | ||
| 113 | ISR(TIMER0_COMPA_vect) | ||
| 114 | { | ||
| 115 | timer_count++; | ||
| 116 | } | ||
