diff options
author | hubmartin <hub.martin@gmail.com> | 2021-08-11 22:00:55 +0200 |
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committer | hubmartin <hub.martin@gmail.com> | 2021-08-11 22:00:55 +0200 |
commit | 0d083a2beac118234f07dacee42f0925420abb42 (patch) | |
tree | 14b23e3113b8cf60cf5fa47b4dadebf654181d88 /src/components/battery | |
parent | abd8f343e48bdfa1dc4c8604d843a5c2d8071bc0 (diff) | |
parent | 643077341b14a52819cbaf02abbd5fb56cdeb802 (diff) |
Merge branch 'develop' into pinmap
Diffstat (limited to 'src/components/battery')
-rw-r--r-- | src/components/battery/BatteryController.cpp | 32 | ||||
-rw-r--r-- | src/components/battery/BatteryController.h | 43 |
2 files changed, 17 insertions, 58 deletions
diff --git a/src/components/battery/BatteryController.cpp b/src/components/battery/BatteryController.cpp index e2fce7f3..cabf101b 100644 --- a/src/components/battery/BatteryController.cpp +++ b/src/components/battery/BatteryController.cpp @@ -24,7 +24,6 @@ void Battery::Update() { return; } // Non blocking read - samples = 0; isReading = true; SaadcInit(); @@ -41,9 +40,9 @@ void Battery::SaadcInit() { nrf_saadc_channel_config_t adcChannelConfig = {.resistor_p = NRF_SAADC_RESISTOR_DISABLED, .resistor_n = NRF_SAADC_RESISTOR_DISABLED, - .gain = NRF_SAADC_GAIN1_5, + .gain = NRF_SAADC_GAIN1_4, .reference = NRF_SAADC_REFERENCE_INTERNAL, - .acq_time = NRF_SAADC_ACQTIME_3US, + .acq_time = NRF_SAADC_ACQTIME_40US, .mode = NRF_SAADC_MODE_SINGLE_ENDED, .burst = NRF_SAADC_BURST_ENABLED, .pin_p = batteryVoltageAdcInput, @@ -61,22 +60,21 @@ void Battery::SaadcEventHandler(nrfx_saadc_evt_t const* p_event) { APP_ERROR_CHECK(nrfx_saadc_buffer_convert(&saadc_value, 1)); // A hardware voltage divider divides the battery voltage by 2 - // ADC gain is 1/5 - // thus adc_voltage = battery_voltage / 2 * gain = battery_voltage / 10 - // reference_voltage is 0.6V + // ADC gain is 1/4 + // thus adc_voltage = battery_voltage / 2 * gain = battery_voltage / 8 + // reference_voltage is 600mV // p_event->data.done.p_buffer[0] = (adc_voltage / reference_voltage) * 1024 - voltage = p_event->data.done.p_buffer[0] * 6000 / 1024; - percentRemaining = (voltage - battery_min) * 100 / (battery_max - battery_min); - percentRemaining = std::max(percentRemaining, 0); - percentRemaining = std::min(percentRemaining, 100); - percentRemainingBuffer.Insert(percentRemaining); - - samples++; - if (samples > percentRemainingSamples) { - nrfx_saadc_uninit(); - isReading = false; + voltage = p_event->data.done.p_buffer[0] * (8 * 600) / 1024; + + if (voltage > battery_max) { + percentRemaining = 100; + } else if (voltage < battery_min) { + percentRemaining = 0; } else { - nrfx_saadc_sample(); + percentRemaining = (voltage - battery_min) * 100 / (battery_max - battery_min); } + + nrfx_saadc_uninit(); + isReading = false; } } diff --git a/src/components/battery/BatteryController.h b/src/components/battery/BatteryController.h index 5c7fa1f4..f33b05ef 100644 --- a/src/components/battery/BatteryController.h +++ b/src/components/battery/BatteryController.h @@ -7,38 +7,6 @@ namespace Pinetime { namespace Controllers { - /** A simple circular buffer that can be used to average - out the sensor values. The total capacity of the CircBuffer - is given as the template parameter N. - */ - template <int N> class CircBuffer { - public: - CircBuffer() : arr {}, sz {}, cap {N}, head {} { - } - /** - insert member function overwrites the next data to the current - HEAD and moves the HEAD to the newly inserted value. - */ - void Insert(const uint8_t num) { - head %= cap; - arr[head++] = num; - if (sz != cap) { - sz++; - } - } - - uint8_t GetAverage() const { - int sum = std::accumulate(arr.begin(), arr.end(), 0); - return static_cast<uint8_t>(sum / sz); - } - - private: - std::array<uint8_t, N> arr; /**< internal array used to store the values*/ - uint8_t sz; /**< The current size of the array.*/ - uint8_t cap; /**< Total capacity of the CircBuffer.*/ - uint8_t head; /**< The current head of the CircBuffer*/ - }; - class Battery { public: Battery(); @@ -47,10 +15,7 @@ namespace Pinetime { void Update(); uint8_t PercentRemaining() const { - auto avg = percentRemainingBuffer.GetAverage(); - avg = std::min(avg, static_cast<uint8_t>(100)); - avg = std::max(avg, static_cast<uint8_t>(0)); - return avg; + return percentRemaining; } uint16_t Voltage() const { @@ -69,12 +34,9 @@ namespace Pinetime { static Battery* instance; nrf_saadc_value_t saadc_value; - static constexpr uint8_t percentRemainingSamples = 5; - CircBuffer<percentRemainingSamples> percentRemainingBuffer {}; - static constexpr nrf_saadc_input_t batteryVoltageAdcInput = NRF_SAADC_INPUT_AIN7; uint16_t voltage = 0; - int percentRemaining = -1; + uint8_t percentRemaining = 0; bool isCharging = false; bool isPowerPresent = false; @@ -85,7 +47,6 @@ namespace Pinetime { static void AdcCallbackStatic(nrfx_saadc_evt_t const* event); bool isReading = false; - uint8_t samples = 0; }; } } |