Merge branch 'develop' of JF/PineTime into master

1 files changed, 43 insertions, 0 deletions

diff --git a/src/drivers/Bma421.h b/src/drivers/Bma421.h
new file mode 100644
index 0000000..da021cb
--- /dev/null
+++ b/src/drivers/Bma421.h
@@ -0,0 +1,43 @@
+#pragma once
+#include <drivers/Bma421_C/bma4_defs.h>
+
+namespace Pinetime {
+  namespace Drivers {
+    class TwiMaster;
+    class Bma421 {
+    public:
+      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;
+
+    private:
+      void Reset();
+
+      TwiMaster& twiMaster;
+      uint8_t deviceAddress = 0x18;
+      struct bma4_dev bma;
+      bool isOk = false;
+      bool isResetOk = false;
+    };
+  }
+}
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