88 lines
1.4 KiB
C
88 lines
1.4 KiB
C
#include <avr/io.h>
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#include <util/delay.h>
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#include "backlight.h"
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uint8_t led_counter = 0;
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uint8_t led_level = 0;
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uint8_t led_col = 0;
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void bl_set()
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{
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if (led_counter > 7)
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{
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led_counter = 0;
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}
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for (led_col = 0;led_col < 5;led_col++)
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{
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switch (led_col) {
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case 0:
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if (led_counter < led_level)
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{
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PORTF |= (1 << 4);
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PORTF &= ~(1 << 5 | 1 << 6 | 1 << 7);
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for(uint8_t i = 0;i < led_level;i++)
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{
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_delay_us(3);
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}
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}
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break;
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case 1:
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if (led_counter < led_level)
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{
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PORTF |= (1 << 5);
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PORTF &= ~(1 << 4 | 1 << 6 | 1 << 7);
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for(uint8_t i = 0;i < led_level;i++)
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{
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_delay_us(3);
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}
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}
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break;
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case 2:
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if (led_counter < led_level)
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{
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PORTF |= (1 << 6);
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PORTF &= ~(1 << 4 | 1 << 5 | 1 << 7);
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for(uint8_t i = 0;i < led_level;i++)
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{
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_delay_us(3);
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}
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}
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break;
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case 3:
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if (led_counter < led_level)
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{
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PORTF |= (1 << 7);
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PORTF &= ~(1 << 4 | 1 << 5 | 1 << 6);
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for(uint8_t i = 0;i < led_level;i++)
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{
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_delay_us(3);
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}
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}
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break;
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case 4:
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PORTF &= ~(1 << 4 | 1 << 5 | 1 << 6 | 1 << 7);
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break;
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}
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}
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led_counter++;
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}
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void backlight_init_ports()
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{
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DDRB |= (1 << 1 | 1 << 2 | 1 << 3);
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PORTB &= ~(1 << 1 | 1 << 2 | 1 << 3);
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DDRF |= (1 << 4 | 1 << 5 | 1 << 6 | 1 << 7);
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PORTF |= (1 << 4 | 1 << 5 | 1 << 6 | 1 << 7);
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backlight_init();
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}
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void backlight_set(uint8_t level)
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{
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led_level = level;
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} |