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 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
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 *    notice, this list of conditions and the following disclaimer in
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/**
 * @file bmp388_spi.cpp
 *
 * SPI interface for BMP388 (NOTE: untested!)
 */

#include <drivers/device/spi.h>

#include "bmp388.h"


/* SPI protocol address bits */
#define DIR_READ			(1<<7)  //for set
#define DIR_WRITE			~(1<<7) //for clear

#pragma pack(push,1)
struct spi_data_s {
	uint8_t addr;
	struct data_s data;
};

struct spi_calibration_s {
	uint8_t addr;
	struct calibration_s cal;
};
#pragma pack(pop)

class BMP388_SPI: public device::SPI, public IBMP388
{
public:
	BMP388_SPI(uint8_t bus, uint32_t device, int bus_frequency, spi_mode_e spi_mode);
	virtual ~BMP388_SPI() = default;

	int init();

	uint8_t get_reg(uint8_t addr);
	int get_reg_buf(uint8_t addr, uint8_t *buf, uint8_t len);
	int set_reg(uint8_t value, uint8_t addr);
	calibration_s *get_calibration(uint8_t addr);

	uint32_t get_device_id() const override { return device::SPI::get_device_id(); }

	uint8_t get_device_address() const override { return device::SPI::get_device_address(); }
private:
	spi_calibration_s _cal;
};

IBMP388 *bmp388_spi_interface(uint8_t busnum, uint32_t device, int bus_frequency, spi_mode_e spi_mode)
{
	return new BMP388_SPI(busnum, device, bus_frequency, spi_mode);
}

BMP388_SPI::BMP388_SPI(uint8_t bus, uint32_t device, int bus_frequency, spi_mode_e spi_mode) :
	SPI(DRV_BARO_DEVTYPE_BMP388, MODULE_NAME, bus, device, spi_mode, bus_frequency)
{
}

int BMP388_SPI::init()
{
	return SPI::init();
};

uint8_t BMP388_SPI::get_reg(uint8_t addr)
{
	uint8_t cmd[2] = { (uint8_t)(addr | DIR_READ), 0}; //set MSB bit
	transfer(&cmd[0], &cmd[0], 2);

	return cmd[1];
}

int BMP388_SPI::get_reg_buf(uint8_t addr, uint8_t *buf, uint8_t len)
{
	uint8_t cmd[1] = {(uint8_t)(addr | DIR_READ)};
	return transfer(&cmd[0], buf, len);
}

int BMP388_SPI::set_reg(uint8_t value, uint8_t addr)
{
	uint8_t cmd[2] = { (uint8_t)(addr & DIR_WRITE), value}; //clear MSB bit
	return transfer(&cmd[0], nullptr, 2);
}

calibration_s *BMP388_SPI::get_calibration(uint8_t addr)
{
	_cal.addr = addr | DIR_READ;

	if (transfer((uint8_t *)&_cal, (uint8_t *)&_cal, sizeof(struct spi_calibration_s)) == OK) {
		return &(_cal.cal);

	} else {
		return nullptr;
	}
}
