119 lines
2.5 KiB
C
119 lines
2.5 KiB
C
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#include "sys/clock.h"
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#include "dev/clock-avr.h"
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#include "sys/etimer.h"
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#include <avr/io.h>
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#include <avr/interrupt.h>
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static volatile clock_time_t count;
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static volatile uint8_t scount;
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volatile unsigned long seconds;
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/* Set RADIOSTATS to monitor radio on time (must also be set in the radio driver) */
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#if RF230BB && WEBSERVER
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#define RADIOSTATS 1
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#endif
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#if RADIOSTATS
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static volatile uint8_t rcount;
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volatile unsigned long radioontime;
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extern uint8_t RF230_receive_on;
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#endif
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/*
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CLOCK_SECOND is the number of ticks per second.
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It is defined through CONF_CLOCK_SECOND in the contiki-conf.h for each platform.
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The usual AVR default is ~125 ticks per second, counting a prescaler the CPU clock
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using the 8 bit timer0.
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As clock_time_t is an unsigned 16 bit data type, intervals up to 524 seconds
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can be measured with 8 millisecond precision.
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For longer intervals a 32 bit global is incremented every second.
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clock-avr.h contains the specific setup code for each mcu.
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*/
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/*---------------------------------------------------------------------------*/
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//SIGNAL(SIG_OUTPUT_COMPARE0)
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ISR(AVR_OUTPUT_COMPARE_INT)
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{
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count++;
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if(++scount == CLOCK_SECOND) {
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scount = 0;
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seconds++;
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}
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#if RADIOSTATS
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if (RF230_receive_on) {
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if (++rcount == CLOCK_SECOND) {
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rcount=0;
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radioontime++;
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}
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}
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#endif
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if(etimer_pending()) {
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etimer_request_poll();
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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clock_init(void)
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{
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cli ();
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OCRSetup();
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//scount = count = 0;
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sei ();
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}
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/*---------------------------------------------------------------------------*/
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clock_time_t
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clock_time(void)
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{
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clock_time_t tmp;
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do {
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tmp = count;
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} while(tmp != count);
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return tmp;
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}
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/*---------------------------------------------------------------------------*/
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/**
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* Delay the CPU for a multiple of TODO
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*/
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void
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clock_delay(unsigned int i)
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{
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for (; i > 0; i--) { /* Needs fixing XXX */
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unsigned j;
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for (j = 50; j > 0; j--)
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asm volatile("nop");
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}
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}
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/*---------------------------------------------------------------------------*/
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/**
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* Wait for a multiple of 1 / 125 sec = 0.008 ms.
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*
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*/
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void
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clock_wait(int i)
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{
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clock_time_t start;
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start = clock_time();
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while(clock_time() - start < (clock_time_t)i);
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}
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/*---------------------------------------------------------------------------*/
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void
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clock_set_seconds(unsigned long sec)
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{
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// TODO
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}
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unsigned long
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clock_seconds(void)
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{
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unsigned long tmp;
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do {
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tmp = seconds;
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} while(tmp != seconds);
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return tmp;
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}
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