| 0,0 → 1,100 |
|---|
| #include "maindefs.h" |
| #include "pin_interrupts.h" |
| #include "pwm.h" |
| #include "msg_queues.h" |
| #include <delays.h> |
| |
| unsigned char port_b_prev_state; |
| |
| void intx_init() { |
| TRISAbits.TRISA5 = 1; |
| |
| TRISCbits.TRISC2 = 0; |
| |
| RPINR1 = 2; // Bind INT1 interrupt to RP2 |
| |
| INTCON2bits.INTEDG1 = 0; // Trigger on falling edge |
| } |
| |
| void int1_interrupt_handler() { |
| pwm_LED_start(); |
| Delay10TCYx(1); |
| pwm_LED_stop(); |
| MQ_sendmsg_ToMainFromLow(0, MSGTYPE_INT1, (void *) 0); |
| } |
| |
| void port_b_int_init() { |
| port_b_prev_state = 0x0F; |
| |
| INTCON2bits.RBPU = 0; |
| |
| // Set pins as inputs |
| TRISBbits.TRISB4 = 1; |
| TRISBbits.TRISB5 = 1; |
| TRISBbits.TRISB6 = 1; |
| TRISBbits.TRISB7 = 1; |
| |
| // Turn on internal voltage pull-up? |
| PORTBbits.RB4 = 1; |
| PORTBbits.RB5 = 1; |
| PORTBbits.RB6 = 1; |
| PORTBbits.RB7 = 1; |
| LATBbits.LATB4 = 1; |
| LATBbits.LATB5 = 1; |
| LATBbits.LATB6 = 1; |
| LATBbits.LATB7 = 1; |
| } |
| |
| void port_b_int_interrupt_handler() { |
| // Pull the new pin values |
| unsigned char new_state = (PORTB & 0xF0) >> 4; |
| |
| // Query which pin input value changed and send value to main() |
| if ((new_state ^ port_b_prev_state) & 0x01) { |
| if (port_b_prev_state & 0x01) { |
| // Pin transitioned HIGH -> LOW (button pressed) |
| DBG_PRINT_PORTB_INT("Port B4 HIGH->LOW\r\n"); |
| MQ_sendmsg_ToMainFromLow(0, MSGTYPE_PORTB_4_DOWN, (void *) 0); |
| } else { |
| // Pin transitioned LOW -> HIGH (button released) |
| DBG_PRINT_PORTB_INT("Port B4 LOW->HIGH\r\n"); |
| MQ_sendmsg_ToMainFromLow(0, MSGTYPE_PORTB_4_UP, (void *) 0); |
| } |
| } |
| if ((new_state ^ port_b_prev_state) & 0x02) { |
| if (port_b_prev_state & 0x02) { |
| // Pin transitioned HIGH -> LOW (button pressed) |
| DBG_PRINT_PORTB_INT("Port B5 HIGH->LOW\r\n"); |
| MQ_sendmsg_ToMainFromLow(0, MSGTYPE_PORTB_5_DOWN, (void *) 0); |
| } else { |
| // Pin transitioned LOW -> HIGH (button released) |
| DBG_PRINT_PORTB_INT("Port B5 LOW->HIGH\r\n"); |
| MQ_sendmsg_ToMainFromLow(0, MSGTYPE_PORTB_5_UP, (void *) 0); |
| } |
| } |
| if ((new_state ^ port_b_prev_state) & 0x04) { |
| if (port_b_prev_state & 0x04) { |
| // Pin transitioned HIGH -> LOW (button pressed) |
| DBG_PRINT_PORTB_INT("Port B6 HIGH->LOW\r\n"); |
| MQ_sendmsg_ToMainFromLow(0, MSGTYPE_PORTB_6_DOWN, (void *) 0); |
| } else { |
| // Pin transitioned LOW -> HIGH (button released) |
| DBG_PRINT_PORTB_INT("Port B6 LOW->HIGH\r\n"); |
| MQ_sendmsg_ToMainFromLow(0, MSGTYPE_PORTB_6_UP, (void *) 0); |
| } |
| } |
| if ((new_state ^ port_b_prev_state) & 0x08) { |
| if (port_b_prev_state & 0x08) { |
| // Pin transitioned HIGH -> LOW (button pressed) |
| DBG_PRINT_PORTB_INT("Port B7 HIGH->LOW\r\n"); |
| MQ_sendmsg_ToMainFromLow(0, MSGTYPE_PORTB_7_DOWN, (void *) 0); |
| } else { |
| // Pin transitioned LOW -> HIGH (button released) |
| DBG_PRINT_PORTB_INT("Port B7 LOW->HIGH\r\n"); |
| MQ_sendmsg_ToMainFromLow(0, MSGTYPE_PORTB_7_UP, (void *) 0); |
| } |
| } |
| |
| // Save the new state of pins |
| port_b_prev_state = new_state; |
| } |