touch/TouchDrvGT9895.hpp

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#pragma once
 
#include "../SensorBuildOpt.h"
#if !SENSORLIB_EXCLUDE_TOUCH_GT9895
 
#include "TouchDrvInterface.hpp"
 
static constexpr uint8_t  GT9895_SLAVE_ADDRESS_H = (0x14);
static constexpr uint8_t  GT9895_SLAVE_ADDRESS_L = (0x5D);
 
class TouchDrvGT9895 :  public TouchDrvInterface
{
public:
    using TouchDrvInterface::getPoint;
    TouchDrvGT9895() = default;
 
    ~TouchDrvGT9895() = default;
 
    void sleep() override;
 
    void wakeup() override;
 
    const TouchPoints &getTouchPoints() override;
 
    const char *getModelName() override;
 
private:
 
    enum CheckSumMode {
        CHECKSUM_MODE_U8_LE,
        CHECKSUM_MODE_U16_LE,
    };
 
    bool initImpl(uint8_t) override;
 
    int calculateChecksum(const uint8_t *data, int size, CheckSumMode mode);
 
    uint32_t getChipPID();
 
    void clearStatus();
 
protected:
 
    static constexpr uint8_t MAX_FINGER_NUM             = (10);
    static constexpr uint8_t IRQ_EVENT_HEAD_LEN         = (8);
    static constexpr uint8_t BYTES_PER_POINT            = (8);
    static constexpr uint8_t COORDS_DATA_CHECKSUM_SIZE  = (2);
 
    static constexpr uint8_t POINT_TYPE_STYLUS_HOVER    = (1);
    static constexpr uint8_t POINT_TYPE_STYLUS          = (3);
 
    static constexpr uint32_t REG_FW_VERSION = (0x010014);
    static constexpr uint32_t REG_INFO       = (0x010070);
    static constexpr uint32_t REG_CMD        = (0x010174);
    static constexpr uint32_t REG_POINT      = (0x010308);
    static constexpr uint32_t REG_NUM_POINT  = (0x01030A);
 
    static constexpr uint32_t CHIP_PID       = (0x9895);
};
 
#endif