89 lines
1.9 KiB
C
89 lines
1.9 KiB
C
/* Sensor routine */
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#include "lib/sensors.h"
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#include "dev/button-sensor.h"
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#include <avr/interrupt.h>
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#include "led.h" // debug
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const struct sensors_sensor button_sensor;
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static struct timer debouncetimer;
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static int status(int type);
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static int enabled = 0;
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volatile static int bstate;
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volatile static int bstatei;
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struct sensors_sensor *sensors[1];
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unsigned char sensors_flags[1];
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#define BUTTON_BIT INTF4
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#define BUTTON_CHECK_IRQ() (EIFR & BUTTON_BIT) ? 0 : 1
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#define PRINTF(...) printf(__VA_ARGS__)
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/*---------------------------------------------------------------------------*/
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ISR(INT4_vect)
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{
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if(BUTTON_CHECK_IRQ()) {
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bstatei = (PINE & _BV(PE4) ? 0 : 1);
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if(timer_expired(&debouncetimer)) {
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// led1_on();
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timer_set(&debouncetimer, CLOCK_SECOND / 16);
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bstate = (PINE & _BV(PE4) ? 0 : 1);
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if(bstate == bstatei){
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sensors_changed(&button_sensor);
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}
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// led1_off();
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}
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}
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}
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/*---------------------------------------------------------------------------*/
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static int
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value(int type)
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{
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//return (PINE & _BV(PE4) ? 0 : 1) || !timer_expired(&debouncetimer);
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return bstate;
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}
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static int
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configure(int type, int c)
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{
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switch (type) {
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case SENSORS_ACTIVE:
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if (c) {
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if(!status(SENSORS_ACTIVE)) {
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// led1_on();
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timer_set(&debouncetimer, 0);
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DDRE |= (0<<DDE4); // Set pin as input
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PORTE |= (1<<PORTE4); // Set port PORTE bint 5 with pullup resistor
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EICRB |= (1<<ISC40); // For falling edge
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EIMSK |= (1<<INT4); // Set int
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enabled = 1;
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sei();
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// led1_off();
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}
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} else {
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enabled = 0;
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EIMSK &= ~(1<<INT4); // clear int
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}
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return 1;
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}
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return 0;
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}
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static int
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status(int type)
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{
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switch (type) {
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case SENSORS_ACTIVE:
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case SENSORS_READY:
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return enabled;//(EIMSK & (1<<INT5) ? 0 : 1);//BUTTON_IRQ_ENABLED();
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}
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return 0;
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}
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SENSORS_SENSOR(button_sensor, BUTTON_SENSOR,
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value, configure, status);
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