TCCR0B = (1 << CS01); /* clk/8 = 1Mhz */
while (1) {
+ /* 4 Khz */
wait_period();
/* buzzer at 2 Khz after 10mns if not always on */
else
BUZZER_OFF();
- /* radio at 500 Hz */
+ /* radio duty cycle is 500/4000 */
if (time_period < 500) {
TX_ENABLE();
+ /* at 500 Hz */
if (time_period & 4)
TX_ON();
else