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annotate network/clock.c @ 107:56d09a0969b5 avr-http

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Import uIP and the PPP implementation from https://code.google.com/p/avrusbmodem/
author Matt Johnston <matt@ucc.asn.au>
date Fri, 07 Sep 2012 23:53:53 +0800
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56d09a0969b5 Import uIP and the PPP implementation from
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1 #include <stdint.h>
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2 #include <stdlib.h>
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3 #include <stdio.h>
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4 #include <avr/interrupt.h>
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5 #include <avr/io.h>
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6 #include <avr/sfr_defs.h>
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7
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8 #include "clock.h"
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9
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10 //Counted time
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11 volatile clock_time_t clock_datetime = 0;
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12
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13 //Overflow interrupt
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14 ISR(TIMER0_COMPA_vect)
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15 {
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16 clock_datetime += 1;
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17 }
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18
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19 //Initialise the clock
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20 void clock_init()
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21 {
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22 // 10ms tick interval
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23 OCR0A = ((F_CPU / 1024) / 100);
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24 TCCR0A = (1 << WGM01);
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25 TCCR0B = ((1 << CS02) | (1 << CS00));
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26 TIMSK0 = (1 << OCIE0A);
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27 }
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28
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29 //Return time
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30 clock_time_t clock_time()
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31 {
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32 clock_time_t time;
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33
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34 ATOMIC_BLOCK(ATOMIC_FORCEON)
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35 {
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36 time = clock_datetime;
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37 }
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38
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39 return time;
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40 }