// motor.c

#include "iodefs.h"
#include "timer.h"

#define MOTOR_PERIOD_SECS 60
#define MOTOR_PULSE_MSECS 200

/*********************************************************************

   20 msec @ 0.2 A every 60 seconds

   0.2 A * 0.200 sec / 60 sec = 0.2 / 300 = 667 uA avg.

   2000 mA-hr AA cells => 3,000 hr => 125 days => ~4 months

   2000 mA-hr AA cells @ 1 mA avg => 83 days
   2000 mA-hr AA cells @ 3 mA avg => 27 days

*********************************************************************/
//
// active low LED push-pull driver
//
#define led_on()  cbi(LED_PORT, LED_BIT)
#define led_off() sbi(LED_PORT, LED_BIT)
#define led_init() sbi(DDR(LED_PORT),LED_BIT); /* LED driver output */ \
                   led_off()

//
// motor with P-chan FET driver
//
#define motor_on()  cbi(MOTOR_PORT, MOTOR_BIT)
#define motor_off() sbi(MOTOR_PORT, MOTOR_BIT)
#define motor_init() sbi(DDR(MOTOR_PORT),MOTOR_BIT); /* motor driver output */ \
                     motor_off()

int main(void)
{
    unsigned char ix;

    osccal();   // calibrate internal processor clock

    timer1_stop();   // stop timer

    led_init();
    motor_init();

    // pulse LED after reset
    led_on(); delay_cs(10); led_off();
    delay_cs(100);
    led_on(); delay_cs(10); led_off();
    delay_cs(100);
    led_on(); delay_cs(10); led_off();
    delay_cs(100);
#if 1
    // pulse motor on startup
    led_on();
    motor_on();
    delay_cs(MOTOR_PULSE_MSECS/10);
    led_off();
    motor_off();
#endif
    while (1) {
        led_off();
        motor_off();
        for (ix = 0; ix < MOTOR_PERIOD_SECS; ++ix) {
            delay_cs(100);
        }
        led_on();
        motor_on();
        delay_cs(MOTOR_PULSE_MSECS/10);
    }
}