lishanpi/drv/spi/spi_driver.h

#ifndef __SPI_DRIVER_H__
#define __SPI_DRIVER_H__

#include <cstdint>
#include "bus_core.h"

enum class SpiPort : uint8_t {
    _0 = 0,
    _1, _2, _3, _4, _5,
    MAX
};

struct SpiConfig {
    uint32_t speed_hz = 1000000;
    uint8_t data_width = 8;
    uint8_t mode = 0;
};

class SpiBus;

class SpiDevice {
public:
    SpiDevice(uint32_t cs_port, uint32_t cs_pin);
    RetCode init();

private:
    friend class SpiBus;
    uint32_t cs_port_;
    uint32_t cs_pin_;
    bool initialized_ = false;
};

class SpiBus {
public:
    explicit SpiBus(SpiPort port);
    ~SpiBus();

    SpiBus(const SpiBus &) = delete;
    SpiBus &operator=(const SpiBus &) = delete;

    RetCode init(const SpiConfig &config);
    RetCode deinit();
    RetCode transfer(SpiDevice *device, BusTransfer *transfer);

private:
    SpiPort port_;
    SpiConfig config_;
    bool initialized_ = false;
};

#endif