diff options
Diffstat (limited to 'src/display.cc')
| -rw-r--r-- | src/display.cc | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/src/display.cc b/src/display.cc index e06f271..b1b0af5 100644 --- a/src/display.cc +++ b/src/display.cc @@ -10,16 +10,23 @@ Display display; extern volatile uint8_t disp[8]; -void Display::turn_off() +void Display::disable() { TIMSK0 &= ~_BV(TOIE0); PORTB = 0; PORTD = 0; } -void Display::turn_on() +void Display::enable() { - TIMSK0 |= _BV(TOIE0); + // Ports B and D drive the dot matrix display -> set all as output + DDRB = 0xff; + DDRD = 0xff; + + // Enable 8bit counter with prescaler=8 (-> timer frequency = 1MHz) + TCCR0A = _BV(CS01); + // raise timer interrupt on counter overflow (-> interrupt frequency = ~4kHz) + TIMSK0 = _BV(TOIE0); } /* |