55 lines
1.1 KiB
C
55 lines
1.1 KiB
C
#include <avr/io.h>
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#ifndef __BASE_H__
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#define __BASE_H__
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#define LINE_OUT 1
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#define LINE_IN 0
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typedef struct GPIO {
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volatile uint8_t *ddr;
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volatile uint8_t *port;
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volatile uint8_t *pin;
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uint8_t addr;
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} gpio_t;
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/*
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#define GPIOA(addr) (gpio_t){ .ddr = &DDRA, .port = &PORTA, .addr = addr }
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#define GPIOB(addr) (gpio_t){ .ddr = &DDRB, .port = &PORTB, .addr = addr }
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#define GPIOC(addr) (gpio_t){ .ddr = &DDRC, .port = &PORTC, .addr = addr }
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#define GPIOD(addr) (gpio_t){ .ddr = &DDRD, .port = &PORTD, .addr = addr }
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*/
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inline void set_line_direction(gpio_t *line, int direction) {
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if (direction == LINE_OUT) {
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*(line->ddr) |= _BV(line->addr);
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} else {
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*(line->ddr) &= ~(_BV(line->addr));
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}
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}
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inline void set_line(gpio_t *line) {
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*(line->port) |= _BV(line->addr);
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}
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inline void clear_line(gpio_t *line) {
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*(line->port) &= ~(_BV(line->addr));
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}
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inline int read_line(gpio_t *line) {
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return (*(line->port) & _BV(line->addr)) > 0;
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}
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typedef struct RNG {
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uint8_t mod;
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int8_t a;
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int8_t c;
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uint8_t seed;
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} rng_t;
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rng_t rng_new(uint8_t seed);
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uint8_t rng_sample(rng_t *state);
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#endif
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