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Enable software-based LED brightness configuration

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This commit is contained in:
Bartłomiej Przemysław Pluta
2020-11-17 17:35:34 +01:00
parent f991e0dc83
commit d01fbdd411
4 changed files with 49 additions and 75 deletions
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89
firmware/led.c
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@@ -2,8 +2,7 @@
#include <avr/interrupt.h>
#include "led.h"
#define SET_LED(PORT, IDX, NUM) PORT = ((PORT & ~(1<<(IDX))) | (~(NUM) & 1<<(IDX)))
volatile uint8_t led_brightness = 1;
volatile uint8_t led_hour;
volatile uint8_t led_minute;
volatile uint8_t led_second;
@@ -12,66 +11,48 @@ void led_init(void)
{
// Set outputs
ANODES_DIR |= HOUR_ANODE | MINUTE_ANODE | SECOND_ANODE;
LED0_DIR |= LED0;
LED1_DIR |= LED1;
LED2_DIR |= LED2;
LED3_DIR |= LED3;
LED4_DIR |= LED4;
LED5_DIR |= LED5;
LED_DIR |= 0x3F; // 0b00111111
// Clear LEDs
ANODES_PORT = HOUR_ANODE | MINUTE_ANODE | SECOND_ANODE;
LED0_PORT |= LED0;
LED1_PORT |= LED1;
LED2_PORT |= LED2;
LED3_PORT |= LED3;
LED4_PORT |= LED4;
LED5_PORT |= LED5;
LED_PORT |= 0x3F; // 0b00111111
TCCR0 |= (1<<WGM01); // CTC Mode
TCCR0 |= (1<<CS02) | (1<<CS00); // Prescaler 1024
OCR0 = 38; // 200Hz
TIMSK |= (1<<OCIE0); // Enable CTC interruptions
TCCR0 |= (1<<CS00);
TIMSK |= (1<<TOIE0);
}
ISR(TIMER0_COMP_vect)
// ISR(TIMER0_COMP_vect)
ISR(TIMER0_OVF_vect)
{
static uint8_t counter = 1;
static uint8_t pwm_counter = 0;
static uint8_t counter = 0;
static uint8_t curr_anode = 1;
switch(counter) {
case 1:
ANODES_PORT = ~HOUR_ANODE;
SET_LED(LED0_PORT, 0, led_hour);
SET_LED(LED1_PORT, 1, led_hour);
SET_LED(LED2_PORT, 2, led_hour);
SET_LED(LED3_PORT, 3, led_hour);
SET_LED(LED4_PORT, 4, led_hour);
SET_LED(LED5_PORT, 5, led_hour);
break;
case 2:
ANODES_PORT = ~MINUTE_ANODE;
SET_LED(LED0_PORT, 0, led_minute);
SET_LED(LED1_PORT, 1, led_minute);
SET_LED(LED2_PORT, 2, led_minute);
SET_LED(LED3_PORT, 3, led_minute);
SET_LED(LED4_PORT, 4, led_minute);
SET_LED(LED5_PORT, 5, led_minute);
break;
case 4:
ANODES_PORT = ~SECOND_ANODE;
SET_LED(LED0_PORT, 0, led_second);
SET_LED(LED1_PORT, 1, led_second);
SET_LED(LED2_PORT, 2, led_second);
SET_LED(LED3_PORT, 3, led_second);
SET_LED(LED4_PORT, 4, led_second);
SET_LED(LED5_PORT, 5, led_second);
break;
switch(curr_anode)
{
case 1:
LED_PORT = ~led_hour;
ANODES_PORT = led_brightness >= pwm_counter ? ~HOUR_ANODE : 0xFF;
break;
case 2:
LED_PORT = ~led_minute;
ANODES_PORT = led_brightness >= pwm_counter ? ~MINUTE_ANODE : 0xFF;
break;
case 4:
LED_PORT = ~led_second;
ANODES_PORT = led_brightness >= pwm_counter ? ~SECOND_ANODE : 0xFF;
break;
}
if(!counter)
{
curr_anode <<= 1;
if(curr_anode > 4) curr_anode = 1;
counter = 250;
}
counter <<= 1;
if(counter > 4)
{
counter = 1;
}
--counter;
++pwm_counter;
}