timer_simple_avr.c

Go to the documentation of this file.
00001 
00039 #warning FIXME:This module is obsolete, yuo must refactor it.
00040 
00041 #if 0
00042 #include <hw/hw_cpufreq.h>
00043 #include "timer_simple_avr.h"
00044 #include <drv/wdt.h>
00045 #include <cfg/compiler.h>
00046 #include <cfg/macros.h> /* BV() */
00047 
00048 #include <avr/io.h>
00049 
00050 
00051 #define MS_PER_SEC       1000UL
00052 #define TIMER_PRESCALER  64UL
00053 #define TIMER_DELAY_1MS  (255 - CPU_FREQ / TIMER_PRESCALER / MS_PER_SEC)
00054 
00059 void timer_delay(mtime_t time)
00060 {
00061     /* Set timer clock to clock_freq/64 */
00062     TCCR0 = BV(CS02);
00063 
00064     while (time--)
00065     {
00066         /* Initialize timer counter register */
00067         TCNT0 = TIMER_DELAY_1MS;
00068         /* Clear overflow bit. */
00069         TIFR |= BV(TOV0);
00070         /* Wait overflow. */
00071         while (!(TIFR & BV(TOV0)));
00072 #if CONFIG_WATCHDOG
00073         wdt_reset();
00074 #endif
00075     }
00076 }
00077 #endif
00078