tinyRemote/key.cpp at master · dgtie/tinyRemote · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
#include <avr/io.h>
#include "lamos.h"

extern unsigned int shift;

char delay;
void usart0();
bool getDuty();
void key(char);

namespace
{

bool pa6(char) { return PORTA.IN & PIN6_bm; }

void __attribute__((optimize("O0"))) scan() {
  PORTA.OUTSET = PIN3_bm | PIN2_bm | PIN1_bm;
  PORTB.OUTSET = PIN1_bm | PIN0_bm;
  if (!pa6(0)) key(0);
  else if (!pa6(PORTA.OUTCLR = PIN3_bm)) key(3);
  else if (!pa6(PORTA.OUTCLR = PIN2_bm)) key(2);
  else if (!pa6(PORTA.OUTCLR = PIN1_bm)) key(1);
  else if (!pa6(PORTB.OUTCLR = PIN1_bm)) key(5);
  else if (!pa6(PORTB.OUTCLR = PIN0_bm)) key(4);
  PORTA.OUTCLR = PIN3_bm | PIN2_bm | PIN1_bm;
  PORTB.OUTCLR = PIN1_bm | PIN0_bm;
  PORTA.INTFLAGS = PIN6_bm;
  PORTA.PIN6CTRL = PORT_PULLUPEN_bm | PORT_ISC_FALLING_gc;
}

} //anonymous

Service tca0([](){
  if (USART0.CTRLB) usart0();
  else {
    if (getDuty()) {
      TCB0.CCMPH = 30;
      PORTA.OUTSET = PIN7_bm;
    } else {
      TCB0.CCMPH = 0;
      if (!shift) PORTA.OUTCLR = PIN7_bm;
    }
    if (delay) { if (!--delay) scan(); }
    else {
      if (shift) { PORTA.OUTSET = PIN7_bm; shift--; }
      else {
        if (!TCB0.CTRLA) {
          TCA0.SINGLE.CTRLA = 0;
          PORTA.OUTCLR = PIN7_bm;
        }
      }
    }
  }
});