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/**
 * @file bmp581_spi.cpp
 *
 * SPI interface for BMP 581 (NOTE: untested!)
 */

#include <drivers/device/spi.h>

#include "bmp581.h"

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

class BMP581_SPI: public device::SPI, public IBMP581
{
public:
	BMP581_SPI(uint8_t bus, uint32_t device, int bus_frequency, spi_mode_e spi_mode);
	virtual ~BMP581_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);

	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(); }
};

IBMP581 *bmp581_spi_interface(uint8_t busnum, uint32_t device, int bus_frequency, spi_mode_e spi_mode)
{
	return new BMP581_SPI(busnum, device, bus_frequency, spi_mode);
}

BMP581_SPI::BMP581_SPI(uint8_t bus, uint32_t device, int bus_frequency, spi_mode_e spi_mode) :
	SPI(DRV_BARO_DEVTYPE_BMP581, MODULE_NAME, bus, device, spi_mode, bus_frequency)
{
}

int BMP581_SPI::init()
{
	return SPI::init();
}

uint8_t BMP581_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 BMP581_SPI::get_reg_buf(uint8_t addr, uint8_t *buf, uint8_t len)
{
	uint8_t cmd[len + 1] = {(uint8_t)(addr | DIR_READ)};
	int ret;

	ret = transfer(&cmd[0], &cmd[0], (len + 1));
	memcpy(buf, &cmd[1], len);

	return ret;
}

int BMP581_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);
}