42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
#pragma once
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#include <FreeRTOS.h>
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#include <semphr.h>
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#include <drivers/include/nrfx_twi.h> // NRF_TWIM_Type
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#include <cstdint>
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namespace Pinetime {
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namespace Drivers {
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class TwiMaster {
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public:
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enum class ErrorCodes { NoError, TransactionFailed };
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TwiMaster(NRF_TWIM_Type* module, uint32_t frequency, uint8_t pinSda, uint8_t pinScl);
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void Init();
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ErrorCodes Read(uint8_t deviceAddress, uint8_t registerAddress, uint8_t* buffer, size_t size);
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ErrorCodes Write(uint8_t deviceAddress, uint8_t registerAddress, const uint8_t* data, size_t size);
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void Sleep();
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void Wakeup();
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private:
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ErrorCodes Read(uint8_t deviceAddress, uint8_t* buffer, size_t size, bool stop);
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ErrorCodes Write(uint8_t deviceAddress, const uint8_t* data, size_t size, bool stop);
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void FixHwFreezed();
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void ConfigurePins() const;
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NRF_TWIM_Type* twiBaseAddress;
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SemaphoreHandle_t mutex = nullptr;
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NRF_TWIM_Type* module;
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uint32_t frequency;
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uint8_t pinSda;
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uint8_t pinScl;
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static constexpr uint8_t maxDataSize {16};
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static constexpr uint8_t registerSize {1};
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uint8_t internalBuffer[maxDataSize + registerSize];
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uint32_t txStartedCycleCount = 0;
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static constexpr uint32_t HwFreezedDelay {161000};
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};
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}
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}
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