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batt: Improve discharge curve values

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Values calculated using multiple tests on 3 PineTimes
This commit is contained in:
Finlay Davidson 2022-12-12 00:44:39 +01:00 committed by JF
parent 762d52e114
commit 8b0d888952
1 changed files with 4 additions and 9 deletions
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13
src/components/battery/BatteryController.cpp
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@ -61,14 +61,8 @@ void Battery::SaadcInit() {
} }
void Battery::SaadcEventHandler(nrfx_saadc_evt_t const* p_event) { void Battery::SaadcEventHandler(nrfx_saadc_evt_t const* p_event) {
static const Utility::LinearApproximation<uint16_t, uint8_t, 6> aprox {{{ static const Utility::LinearApproximation<uint16_t, uint8_t, 6> approx {
{3500, 0}, // Minimum voltage before shutdown (depends on the battery) {{{3500, 0}, {3616, 3}, {3723, 22}, {3776, 48}, {3979, 79}, {4180, 100}}}};
{3600, 10}, // Keen point that corresponds to 10%
{3700, 25},
{3750, 50},
{3900, 75},
{4180, 100} // Maximum voltage during charging is 4.21V
}}};
if (p_event->type == NRFX_SAADC_EVT_DONE) { if (p_event->type == NRFX_SAADC_EVT_DONE) {
@ -83,7 +77,8 @@ void Battery::SaadcEventHandler(nrfx_saadc_evt_t const* p_event) {
uint8_t newPercent = 100; uint8_t newPercent = 100;
if (!isFull) { if (!isFull) {
newPercent = std::min(aprox.GetValue(voltage), isCharging ? uint8_t {99} : uint8_t {100}); // max. voltage while charging is higher than when discharging
newPercent = std::min(approx.GetValue(voltage), isCharging ? uint8_t {99} : uint8_t {100});
} }
if (isPowerPresent) { if (isPowerPresent) {