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#ifndef _INTERCOM_H
#define _INTERCOM_H
#include <stdint.h>
#include "config.h"
#ifdef HOST
#define enable_transmit() do { WRITE(TX_ENABLE_PIN,1); UCSR1B &= ~MASK(RXEN1); } while(0)
#define disable_transmit() do { WRITE(TX_ENABLE_PIN,0); UCSR1B |= MASK(RXEN1); } while(0)
#else
#define enable_transmit() do { WRITE(TX_ENABLE_PIN,1); UCSR0B &= ~MASK(RXEN0); } while(0)
#define disable_transmit() do { WRITE(TX_ENABLE_PIN,0); UCSR0B |= MASK(RXEN0); } while(0)
#endif
// initialise serial subsystem
void intercom_init(void);
// if host, send target temperature to extruder
// if extruder, send actual temperature to host
void send_temperature(uint8_t index, uint16_t temperature);
// if host, read actual temperature from extruder
// if extruder, read target temperature from host
uint16_t read_temperature(uint8_t index);
// if host, set DIOs on extruder controller
// if extruder, report DIO state
void set_dio(uint8_t index, uint8_t value);
// if host, read extruder DIO inputs
// if extruder, set DIO outputs
uint8_t get_dio(uint8_t index);
// set error code to send to other end
void set_err(uint8_t err);
// get error code sent from other end
uint8_t get_err(void);
// if host, send packet to extruder
// if extruder, return packet to host
void start_send(void);
#define FLAG_RX_IN_PROGRESS 1
#define FLAG_TX_IN_PROGRESS 2
#define FLAG_NEW_RX 4
#define FLAG_TX_FINISHED 8
extern volatile uint8_t intercom_flags;
#endif /* _INTERCOM_H */
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