flowmaster_private.h

#ifndef FM_SERIAL_PRIVATE
#define FM_SERIAL_PRIVATE

#include "flowmaster.h"
#include <stdint.h>

#if defined _WIN32
	#include <Windows.h>
	typedef HANDLE serial_handle;
#elif defined __unix
	typedef int serial_handle;
#else
	#error unsupported platform
#endif

/* The size of the TX and RX buffers when talking to the controller */
#define FM_BUFFER_SIZE 32

/* How many bytes we are expecting when setting the fan profile. */
#define FM_FAN_BUFFER_SIZE 65

/*
 *	Data result to return the fan status
 * */
struct fm_data_s {
	/* Duty cycle, a percentage between 0.0 and 1.0 */
	float fan_duty_cycle;
	float pump_duty_cycle;

	/* Temp, in degrees celcius */
	float ambient_temp;
	float coolant_temp;

	/* litres per hour */
	float flow_rate;

	/* Fan RPM, as a whole integer */
	int fan_rpm;
	int pump_rpm;
};

typedef struct fm_data_s fm_data;

/* Get the current pump data */
fm_rc fm_get_data(struct flowmaster_s *fm, fm_data *data);

struct flowmaster_s
{
	serial_handle port;
	unsigned char write_buffer[FM_BUFFER_SIZE];
	unsigned char read_buffer[FM_BUFFER_SIZE];
	int write_buffer_len; /* number of chars in the buffer */
	int read_buffer_len; /* number of chars in the buffer */
	int timer_top;
	fm_data data;
};
typedef struct flowmaster_s flowmaster;

fm_rc fm_connect_private(flowmaster *fm, const char *port);

int fm_prev_rx_byte(flowmaster *fm, unsigned char *byte);

/* Writes a block of bytes */
int fm_serial_write(flowmaster *fm, int *written);
/* Writes a single byte */
int fm_serial_write_byte(flowmaster *fm, unsigned char byte);

/*
 * Reads a single byte into *byte
 *
 * Returns 0 if data is read
 * nonzero on error
 * */
int fm_serial_read_byte(flowmaster *fm, unsigned char *byte);

/* Reads from the input buffer and discards results */
void fm_flush_buffers(flowmaster *fm);

/* Get and Set the baud rate*/

int fm_set_baudrate(flowmaster *fm, fm_baud_rate baud);
int fm_get_baudrate(flowmaster *fm, fm_baud_rate *baud);

/* For reading and writing data to the microcontroller */
void fm_start_write_buffer(flowmaster *fm, int packet_type, int data_len);
void fm_end_write_buffer(flowmaster *fm);
void fm_add_byte(flowmaster *fm, unsigned char byte);
void fm_add_word(flowmaster *fm, uint16_t byte);
void fm_add_csum(flowmaster *fm, int length);
int  fm_serial_read(flowmaster *fm);
int  fm_validate_packet(flowmaster *fm, int expected_packet);

#endif