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#include "maindefs.h"
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#include "pin_interrupts.h"
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#include "pwm.h"
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#include "msg_queues.h"
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#include <delays.h>
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static unsigned char port_b_prev_state;
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void intx_init() {
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TRISAbits.TRISA5 = 1;
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TRISCbits.TRISC2 = 0;
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LATCbits.LATC2 = 0;
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RPINR1 = 2; // Bind INT1 interrupt to RP2
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INTCON3bits.INT1IE = 1; // Enable interrupt for INT1
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INTCON2bits.INTEDG1 = 0; // Trigger on falling edge
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}
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void int1_interrupt_handler() {
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LATCbits.LATC2 = 1;
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Delay10TCYx(1);
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LATCbits.LATC2 = 0;
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}
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void port_b_int_init() {
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port_b_prev_state = 0x0F;
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INTCON2bits.RBPU = 0;
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// Set pins as inputs
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TRISBbits.TRISB4 = 1;
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TRISBbits.TRISB5 = 1;
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TRISBbits.TRISB6 = 1;
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TRISBbits.TRISB7 = 1;
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// Turn on internal voltage pull-up
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PORTBbits.RB4 = 1;
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PORTBbits.RB5 = 1;
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PORTBbits.RB6 = 1;
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PORTBbits.RB7 = 1;
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LATBbits.LATB4 = 1;
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LATBbits.LATB5 = 1;
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LATBbits.LATB6 = 1;
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LATBbits.LATB7 = 1;
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}
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void port_b_int_interrupt_handler() {
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// Pull the new pin values
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unsigned char new_state = (PORTB & 0xF0) >> 4;
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// Query which pin input value changed and send value to main()
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if ((new_state ^ port_b_prev_state) & 0x01) {
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if (port_b_prev_state & 0x01) {
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// Pin transitioned HIGH -> LOW (button pressed)
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DBG_PRINT_PORTB_INT("Port B4 HIGH->LOW\r\n");
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MQ_sendmsg_ToMainFromLow(0, MSGTYPE_PORTB_4_DOWN, (void *) 0);
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} else {
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// Pin transitioned LOW -> HIGH (button released)
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DBG_PRINT_PORTB_INT("Port B4 LOW->HIGH\r\n");
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MQ_sendmsg_ToMainFromLow(0, MSGTYPE_PORTB_4_UP, (void *) 0);
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}
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}
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if ((new_state ^ port_b_prev_state) & 0x02) {
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if (port_b_prev_state & 0x02) {
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// Pin transitioned HIGH -> LOW (button pressed)
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DBG_PRINT_PORTB_INT("Port B5 HIGH->LOW\r\n");
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MQ_sendmsg_ToMainFromLow(0, MSGTYPE_PORTB_5_DOWN, (void *) 0);
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} else {
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// Pin transitioned LOW -> HIGH (button released)
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DBG_PRINT_PORTB_INT("Port B5 LOW->HIGH\r\n");
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MQ_sendmsg_ToMainFromLow(0, MSGTYPE_PORTB_5_UP, (void *) 0);
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}
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}
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if ((new_state ^ port_b_prev_state) & 0x04) {
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if (port_b_prev_state & 0x04) {
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// Pin transitioned HIGH -> LOW (button pressed)
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DBG_PRINT_PORTB_INT("Port B6 HIGH->LOW\r\n");
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MQ_sendmsg_ToMainFromLow(0, MSGTYPE_PORTB_6_DOWN, (void *) 0);
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} else {
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// Pin transitioned LOW -> HIGH (button released)
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DBG_PRINT_PORTB_INT("Port B6 LOW->HIGH\r\n");
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MQ_sendmsg_ToMainFromLow(0, MSGTYPE_PORTB_6_UP, (void *) 0);
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}
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}
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if ((new_state ^ port_b_prev_state) & 0x08) {
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if (port_b_prev_state & 0x08) {
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// Pin transitioned HIGH -> LOW (button pressed)
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DBG_PRINT_PORTB_INT("Port B7 HIGH->LOW\r\n");
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MQ_sendmsg_ToMainFromLow(0, MSGTYPE_PORTB_7_DOWN, (void *) 0);
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} else {
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// Pin transitioned LOW -> HIGH (button released)
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DBG_PRINT_PORTB_INT("Port B7 LOW->HIGH\r\n");
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MQ_sendmsg_ToMainFromLow(0, MSGTYPE_PORTB_7_UP, (void *) 0);
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}
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}
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// Save the new state of pins
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port_b_prev_state = new_state;
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}
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