qmk-firmware/keyboards/helix/serial.h

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#ifndef MY_SERIAL_H
#define MY_SERIAL_H
#include "config.h"
#include <stdbool.h>
/* TODO: some defines for interrupt setup */
#define SERIAL_PIN_DDR DDRD
#define SERIAL_PIN_PORT PORTD
#define SERIAL_PIN_INPUT PIND
#ifndef USE_SERIAL_PD2
#define SERIAL_PIN_MASK _BV(PD0)
#define SERIAL_PIN_INTERRUPT INT0_vect
#else
#define SERIAL_PIN_MASK _BV(PD2)
#define SERIAL_PIN_INTERRUPT INT2_vect
#endif
#define SERIAL_SLAVE_BUFFER_LENGTH MATRIX_ROWS/2
#ifdef KEYBOARD_helix_rev1
#define SERIAL_MASTER_BUFFER_LENGTH 1
#else
#define SERIAL_MASTER_BUFFER_LENGTH MATRIX_ROWS/2
#endif
// Buffers for master - slave communication
extern volatile uint8_t serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH];
extern volatile uint8_t serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH];
void serial_master_init(void);
void serial_slave_init(void);
int serial_update_buffers(void);
bool serial_slave_data_corrupt(void);
#endif