osd-contiki/cpu/avr/dev/clock.c

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#include "sys/clock.h"
#include "dev/clock-avr.h"
#include "sys/etimer.h"
#include <avr/io.h>
#include <avr/interrupt.h>
/*
CLOCK_SECOND is the number of ticks per second.
It is defined through CONF_CLOCK_SECOND in the contiki-conf.h for each platform.
The usual AVR defaults are 128 or 125 ticks per second, counting a prescaled CPU clock
using the 8 bit timer0.
As clock_time_t is an unsigned 16 bit data type, intervals up to 512 or 524 seconds
can be measured with ~8 millisecond precision.
For longer intervals a 32 bit global is incremented every second.
clock-avr.h contains the specific setup code for each mcu.
*/
/* count is a 16 bit tick counter that wraps every ~10 minutes, returned by clock_time() */
static volatile clock_time_t count;
/* scount is the 8 bit counter that counts ticks modulo CLOCK_SECONDS */
static volatile uint8_t scount;
/* seconds is the number of seconds since startup, returned by clock_seconds() */
volatile unsigned long seconds;
/* sleepseconds is the number of seconds sleeping since startup, available globally */
long sleepseconds;
/* Set RADIOSTATS to monitor radio on time (must also be set in the radio driver) */
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#if RF230BB && AVR_WEBSERVER
#define RADIOSTATS 1
#endif
#if RADIOSTATS
static volatile uint8_t rcount;
volatile unsigned long radioontime;
extern uint8_t RF230_receive_on;
#endif
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/* Set RADIO_CONF_CALIBRATE_INTERVAL for periodic calibration of the PLL during extended radio on time.
* The RF230 data sheet suggests every 5 minutes if the temperature is fluctuating.
* At present the specified interval is ignored, and an 8 bit counter gives 256 second intervals.
* Actual calibration is done by the driver on the next transmit request.
*/
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#if RADIO_CONF_CALIBRATE_INTERVAL
extern volatile uint8_t rf230_calibrate;
static uint8_t calibrate_interval;
#endif
#if 0
/*---------------------------------------------------------------------------*/
/* This routine can be called to add seconds to the clock after a sleep
* of an integral number of seconds.
*/
void clock_adjust_seconds(uint8_t howmany) {
seconds += howmany;
sleepseconds +=howmany;
count += howmany * CLOCK_SECOND;
#if RADIOSTATS
if (RF230_receive_on) radioontime += howmany;
#endif
}
#endif
/*---------------------------------------------------------------------------*/
/* This routine can be called to add ticks to the clock after a sleep.
*/
void clock_adjust_ticks(uint16_t howmany) {
count += howmany;
scount += howmany;
while(scount >= CLOCK_SECOND) {
scount -= CLOCK_SECOND;
seconds++;
sleepseconds++;
#if RADIOSTATS
if (RF230_receive_on) radioontime += 1;
#endif
}
}
/*---------------------------------------------------------------------------*/
//SIGNAL(SIG_OUTPUT_COMPARE0)
ISR(AVR_OUTPUT_COMPARE_INT)
{
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count++;
if(++scount == CLOCK_SECOND) {
scount = 0;
seconds++;
}
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#if RADIO_CONF_CALIBRATE_INTERVAL
if (++calibrate_interval==0) {
rf230_calibrate=1;
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}
#endif
#if RADIOSTATS
if (RF230_receive_on) {
if (++rcount == CLOCK_SECOND) {
rcount=0;
radioontime++;
}
}
#endif
#if 1
/* gcc will save all registers on the stack if an external routine is called */
if(etimer_pending()) {
etimer_request_poll();
}
#else
/* doing this locally saves 9 pushes and 9 pops, but these etimer.c and process.c variables have to lose the static qualifier */
extern struct etimer *timerlist;
extern volatile unsigned char poll_requested;
#define PROCESS_STATE_NONE 0
#define PROCESS_STATE_RUNNING 1
#define PROCESS_STATE_CALLED 2
if (timerlist) {
if(etimer_process.state == PROCESS_STATE_RUNNING ||
etimer_process.state == PROCESS_STATE_CALLED) {
etimer_process.needspoll = 1;
poll_requested = 1;
}
}
#endif
}
/*---------------------------------------------------------------------------*/
void
clock_init(void)
{
cli ();
OCRSetup();
//scount = count = 0;
sei ();
}
/*---------------------------------------------------------------------------*/
clock_time_t
clock_time(void)
{
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clock_time_t tmp;
do {
tmp = count;
} while(tmp != count);
return tmp;
}
#if 0
/*---------------------------------------------------------------------------*/
/**
* Delay the CPU for a multiple of TODO
*/
void
clock_delay(unsigned int i)
{
for (; i > 0; i--) { /* Needs fixing XXX */
unsigned j;
for (j = 50; j > 0; j--)
asm volatile("nop");
}
}
/*---------------------------------------------------------------------------*/
/**
* Wait for a number of clock ticks.
*
*/
void
clock_wait(int i)
{
clock_time_t start;
start = clock_time();
while(clock_time() - start < (clock_time_t)i);
}
/*---------------------------------------------------------------------------*/
void
clock_set_seconds(unsigned long sec)
{
seconds = sec;
}
#endif
unsigned long
clock_seconds(void)
{
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unsigned long tmp;
do {
tmp = seconds;
} while(tmp != seconds);
return tmp;
}
#ifdef HANG_ON_UNKNOWN_INTERRUPT
/* Useful for diagnosing unknown interrupts that reset the mcu.
* Currently set up for 12mega128rfa1.
* For other mcus, enable all and then disable the conflicts.
*/
static volatile uint8_t x;
ISR( _VECTOR(0)) {while (1) x++;}
ISR( _VECTOR(1)) {while (1) x++;}
ISR( _VECTOR(2)) {while (1) x++;}
ISR( _VECTOR(3)) {while (1) x++;}
ISR( _VECTOR(4)) {while (1) x++;}
ISR( _VECTOR(5)) {while (1) x++;}
ISR( _VECTOR(6)) {while (1) x++;}
ISR( _VECTOR(7)) {while (1) x++;}
ISR( _VECTOR(8)) {while (1) x++;}
ISR( _VECTOR(9)) {while (1) x++;}
ISR( _VECTOR(10)) {while (1) x++;}
ISR( _VECTOR(11)) {while (1) x++;}
ISR( _VECTOR(12)) {while (1) x++;}
ISR( _VECTOR(13)) {while (1) x++;}
ISR( _VECTOR(14)) {while (1) x++;}
ISR( _VECTOR(15)) {while (1) x++;}
ISR( _VECTOR(16)) {while (1) x++;}
ISR( _VECTOR(17)) {while (1) x++;}
ISR( _VECTOR(18)) {while (1) x++;}
ISR( _VECTOR(19)) {while (1) x++;}
//ISR( _VECTOR(20)) {while (1) x++;}
//ISR( _VECTOR(21)) {while (1) x++;}
ISR( _VECTOR(22)) {while (1) x++;}
ISR( _VECTOR(23)) {while (1) x++;}
ISR( _VECTOR(24)) {while (1) x++;}
//ISR( _VECTOR(25)) {while (1) x++;}
ISR( _VECTOR(26)) {while (1) x++;}
//ISR( _VECTOR(27)) {while (1) x++;}
ISR( _VECTOR(28)) {while (1) x++;}
ISR( _VECTOR(29)) {while (1) x++;}
ISR( _VECTOR(30)) {while (1) x++;}
ISR( _VECTOR(31)) {while (1) x++;}
//ISR( _VECTOR(32)) {while (1) x++;}
ISR( _VECTOR(33)) {while (1) x++;}
ISR( _VECTOR(34)) {while (1) x++;}
ISR( _VECTOR(35)) {while (1) x++;}
//ISR( _VECTOR(36)) {while (1) x++;}
ISR( _VECTOR(37)) {while (1) x++;}
//ISR( _VECTOR(38)) {while (1) x++;}
ISR( _VECTOR(39)) {while (1) x++;}
ISR( _VECTOR(40)) {while (1) x++;}
ISR( _VECTOR(41)) {while (1) x++;}
ISR( _VECTOR(42)) {while (1) x++;}
ISR( _VECTOR(43)) {while (1) x++;}
ISR( _VECTOR(44)) {while (1) x++;}
ISR( _VECTOR(45)) {while (1) x++;}
ISR( _VECTOR(46)) {while (1) x++;}
ISR( _VECTOR(47)) {while (1) x++;}
ISR( _VECTOR(48)) {while (1) x++;}
ISR( _VECTOR(49)) {while (1) x++;}
ISR( _VECTOR(50)) {while (1) x++;}
ISR( _VECTOR(51)) {while (1) x++;}
ISR( _VECTOR(52)) {while (1) x++;}
ISR( _VECTOR(53)) {while (1) x++;}
ISR( _VECTOR(54)) {while (1) x++;}
ISR( _VECTOR(55)) {while (1) x++;}
ISR( _VECTOR(56)) {while (1) x++;}
//ISR( _VECTOR(57)) {while (1) x++;}
//ISR( _VECTOR(58)) {while (1) x++;}
//ISR( _VECTOR(59)) {while (1) x++;}
//ISR( _VECTOR(60)) {while (1) x++;}
ISR( _VECTOR(61)) {while (1) x++;}
ISR( _VECTOR(62)) {while (1) x++;}
ISR( _VECTOR(63)) {while (1) x++;}
ISR( _VECTOR(64)) {while (1) x++;}
ISR( _VECTOR(65)) {while (1) x++;}
ISR( _VECTOR(66)) {while (1) x++;}
ISR( _VECTOR(67)) {while (1) x++;}
ISR( _VECTOR(68)) {while (1) x++;}
ISR( _VECTOR(69)) {while (1) x++;}
ISR( _VECTOR(70)) {while (1) x++;}
ISR( _VECTOR(71)) {while (1) x++;}
ISR( _VECTOR(72)) {while (1) x++;}
ISR( _VECTOR(73)) {while (1) x++;}
ISR( _VECTOR(74)) {while (1) x++;}
ISR( _VECTOR(75)) {while (1) x++;}
ISR( _VECTOR(76)) {while (1) x++;}
ISR( _VECTOR(77)) {while (1) x++;}
ISR( _VECTOR(78)) {while (1) x++;}
ISR( _VECTOR(79)) {while (1) x++;}
#endif