105 lines
1.5 KiB
C
105 lines
1.5 KiB
C
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#include <avr/io.h>
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#include <stdint.h>
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#include "util.h"
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static volatile uint16_t s_lfsr=0xACE1u;
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void init_random( uint16_t lfsr ) {
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s_lfsr = lfsr;
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}
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uint16_t random( void ) {
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uint8_t bit;
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bit = ((s_lfsr >> 0) ^ (s_lfsr >> 2) ^ (s_lfsr >> 3) ^ (s_lfsr >> 5) ) & 1;
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s_lfsr = (s_lfsr >> 1) | (bit << 15);
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return s_lfsr;
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}
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void get_color( uint16_t *r, uint16_t *g, uint16_t *b, uint8_t colorIndex ) {
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switch( colorIndex ) {
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case COLOR_RED:
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*r = MAX_BRIGHTNESS;
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*g = 0x00;
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*b = 0x00;
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break;
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case COLOR_GREEN:
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*r = 0x00;
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*g = MAX_BRIGHTNESS;
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*b = 0x00;
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break;
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case COLOR_YELLOW:
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*r = MAX_BRIGHTNESS;
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*g = MAX_BRIGHTNESS;
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*b = 0x00;
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break;
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case COLOR_BLUE:
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*r = 0x00;
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*g = 0x00;
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*b = MAX_BRIGHTNESS;
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break;
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case COLOR_MAGENTA:
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*r = MAX_BRIGHTNESS;
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*g = 0x00;
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*b = MAX_BRIGHTNESS;
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break;
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case COLOR_CYAN:
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*r = 0x00;
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*g = MAX_BRIGHTNESS;
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*b = MAX_BRIGHTNESS;
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break;
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case COLOR_WHITE:
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*r = MAX_BRIGHTNESS;
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*g = MAX_BRIGHTNESS;
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*b = MAX_BRIGHTNESS;
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break;
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default: // black
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*r = 0x00;
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*g = 0x00;
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*b = 0x00;
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break;
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}
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}
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uint8_t get_button( void ) {
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static uint8_t last_button = BUTTON_NONE;
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uint8_t button = BUTTON_NONE;
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if( !(PIND&(1<<PD5)) )
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button = BUTTON_LU;
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if( !(PIND&(1<<PD6)) )
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button = BUTTON_LO;
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if( !(PIND&(1<<PD7)) )
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button = BUTTON_RO;
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if( !(PINB&(1<<PB0)) )
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button = BUTTON_RU;
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if( button != last_button ) {
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last_button = button;
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return button;
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}
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return BUTTON_NONE;
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}
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