InfiniTime.git

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46

#pragma once
#include <drivers/Bma421_C/bma4_defs.h>

namespace Pinetime {
  namespace Drivers {
    class TwiMaster;
    class Bma421 {
    public:
      enum class DeviceTypes : uint8_t { Unknown, BMA421, BMA425 };
      struct Values {
        uint32_t steps;
        int16_t x;
        int16_t y;
        int16_t z;
      };
      Bma421(TwiMaster& twiMaster, uint8_t twiAddress);
      Bma421(const Bma421&) = delete;
      Bma421& operator=(const Bma421&) = delete;
      Bma421(Bma421&&) = delete;
      Bma421& operator=(Bma421&&) = delete;

      /// The chip freezes the TWI bus after the softreset operation. Softreset is separated from the
      /// Init() method to allow the caller to uninit and then reinit the TWI device after the softreset.
      void SoftReset();
      void Init();
      Values Process();
      void ResetStepCounter();

      void Read(uint8_t registerAddress, uint8_t* buffer, size_t size);
      void Write(uint8_t registerAddress, const uint8_t* data, size_t size);

      bool IsOk() const;
      DeviceTypes DeviceType() const;

    private:
      void Reset();

      TwiMaster& twiMaster;
      uint8_t deviceAddress = 0x18;
      struct bma4_dev bma;
      bool isOk = false;
      bool isResetOk = false;
      DeviceTypes deviceType = DeviceTypes::Unknown;
    };
  }
}