101 lines
2.0 KiB
C
101 lines
2.0 KiB
C
#include <pentabug/pentatonic.h>
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#include <avr/io.h>
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// pins affected by pentatonic on each port
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static const uint8_t bits_c = (1 << 4) | (1 << 5);
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static const uint8_t bits_d = (1 << 5) | (1 << 6) | (1 << 7);
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// these functions assign the pentatonic bits to pins on a port
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static inline uint8_t bits_to_c(uint8_t direction) {
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return ((direction & (1 << 3)) << 2) | (direction & (1 << 4));
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}
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static inline uint8_t bits_to_d(uint8_t direction) {
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return (direction << 5) & bits_d;
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}
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void pentatonic_direction(uint8_t direction) {
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// map bits to pins
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const uint8_t part_c = bits_to_c(direction);
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const uint8_t part_d = bits_to_d(direction);
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// reset direction
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DDRC &= ~bits_c;
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DDRD &= ~bits_d;
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// pullup if input, off if output (inverted)
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PORTC |= bits_c;
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PORTD |= bits_d;
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// set new direction
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DDRC |= part_c;
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DDRD |= part_d;
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}
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void pentatonic_multi_led_on(uint8_t leds) {
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// map bits to pins
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const uint8_t part_c = bits_to_c(leds);
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const uint8_t part_d = bits_to_d(leds);
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// set leds on (inverted)
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PORTC &= ~(part_c & bits_c);
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PORTD &= ~(part_d & bits_d);
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}
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void pentatonic_multi_led_off(uint8_t leds) {
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// map bits to pins
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uint8_t part_c = bits_to_c(leds);
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uint8_t part_d = bits_to_d(leds);
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// set leds on (inverted)
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PORTC |= part_c;
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PORTD |= part_d;
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}
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void pentatonic_led_on(uint8_t led) {
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pentatonic_multi_led_on(1 << led);
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}
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void pentatonic_led_off(uint8_t led) {
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pentatonic_multi_led_off(1 << led);
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}
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void pentatonic_led_set(uint8_t led, uint8_t state) {
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if(state) {
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pentatonic_led_on(led);
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} else {
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pentatonic_led_off(led);
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}
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}
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void pentatonic_all_led_set(uint8_t leds) {
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pentatonic_multi_led_off(0xff);
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pentatonic_multi_led_on(leds);
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}
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uint8_t pentatonic_buttons(void) {
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// assign pins to pentatonic bits
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uint8_t part_c = ((PINC & (1 << 5)) >> 2) | (PINC & (1 << 4));
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uint8_t part_d = PIND >> 5 & 0b111;
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// return inverted as switches are connected to ground
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return ~(part_c | part_d) & 0b11111;
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}
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uint8_t pentatonic_button(uint8_t button) {
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return pentatonic_buttons() & (1 << button);
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}
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