wideband/firmware/max31855.h

#pragma once

#include "hal.h"

#include "wideband_config.h"
#include "thread_controller.h"

typedef enum {
	MAX31855_OK = 0,
	MAX31855_OPEN_CIRCUIT = 1,
	MAX31855_SHORT_TO_GND = 2,
	MAX31855_SHORT_TO_VCC = 3,
	MAX31855_NO_REPLY = 4,
} Max31855State;

/* livedata: +96/112 offset, size = 16 */
struct livedata_egt_s {
	union {
		struct {
			float temperature;
			float coldJunctionTemperature;
			uint8_t state;
		} __attribute__((packed));
		uint8_t pad[16];
	};
};

// for all board. in case of no EGT - returns NULL
const struct livedata_egt_s * getEgtLiveDataStructAddr(const int ch);

#if (EGT_CHANNELS > 0)

#define MAX31855_THREAD_STACK 	(512)
#define MAX31855_THREAD_PRIO	(NORMALPRIO + 1)

class Max31855 {
public:
    Max31855(SPIConfig *spi) {
        this->spi = spi;
    }
	livedata_egt_s livedata;
	/* do we need float temperatures? */
	float coldJunctionTemperature;
	float temperature;
	int readPacket();
private:
    SPIConfig *spi;
	int spi_rx(uint32_t *data);
};

class Max31855Thread : public ThreadController<MAX31855_THREAD_STACK> {
public:
    Max31855Thread(Max31855 max31855[EGT_CHANNELS])
    : ThreadController("egt", MAX31855_THREAD_PRIO)
    {
        this->max31855 = max31855;
    }

	void ThreadTask() override;
private:
    Max31855 *max31855;
};

void StartEgt();
Max31855* getEgtDrivers();

#endif // (EGT_CHANNELS > 0)