56 lines
1.5 KiB
C++
56 lines
1.5 KiB
C++
#pragma once
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#include <cstdint>
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#include <drivers/include/nrfx_saadc.h>
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#include <array>
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#include <numeric>
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namespace Pinetime {
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namespace Controllers {
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// A simple circular buffer that can be used to average
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// out the sensor values
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template <int N>
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class CircBuffer {
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public:
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CircBuffer() : arr{}, sz{}, cap{N}, loc{} {}
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void insert(const float num) {
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loc %= cap;
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arr[loc++] = num;
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if (sz != cap) {
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sz++;
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}
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}
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int GetAverage() const {
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int sum = std::accumulate(arr.begin(), arr.end(), 0.0f);
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return (sum / sz);
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}
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private:
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std::array<float, N> arr;
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uint8_t sz;
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uint8_t cap;
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uint8_t loc;
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};
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class Battery {
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public:
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void Init();
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void Update();
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int PercentRemaining() const { return percentRemainingBuffer.GetAverage(); }
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float Voltage() const { return voltage; }
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bool IsCharging() const { return isCharging; }
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bool IsPowerPresent() const { return isPowerPresent; }
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private:
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static constexpr uint32_t chargingPin = 12;
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static constexpr uint32_t powerPresentPin = 19;
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static constexpr nrf_saadc_input_t batteryVoltageAdcInput = NRF_SAADC_INPUT_AIN7;
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static constexpr uint8_t percentRemainingSamples = 10;
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static void SaadcEventHandler(nrfx_saadc_evt_t const * p_event);
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CircBuffer<percentRemainingSamples> percentRemainingBuffer {};
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float voltage = 0.0f;
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bool isCharging = false;
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bool isPowerPresent = false;
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};
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}
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} |