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Frieder Schrempf
e3bb225efb
Some NRF52 boards are able to use the internal power-efficient DC/DC regulator. Add a new class that can be inherited by board classes to enable this feature and reduce the power consumption. Signed-off-by: Frieder Schrempf <frieder@fris.de>
41 lines
982 B
C++
41 lines
982 B
C++
#if defined(NRF52_PLATFORM)
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#include "NRF52Board.h"
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void NRF52Board::begin() {
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startup_reason = BD_STARTUP_NORMAL;
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}
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void NRF52BoardDCDC::begin() {
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NRF52Board::begin();
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// Enable DC/DC converter for improved power efficiency
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uint8_t sd_enabled = 0;
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sd_softdevice_is_enabled(&sd_enabled);
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if (sd_enabled) {
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sd_power_dcdc_mode_set(NRF_POWER_DCDC_ENABLE);
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} else {
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NRF_POWER->DCDCEN = 1;
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}
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}
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// Temperature from NRF52 MCU
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float NRF52Board::getMCUTemperature() {
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NRF_TEMP->TASKS_START = 1; // Start temperature measurement
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long startTime = millis();
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while (NRF_TEMP->EVENTS_DATARDY == 0) { // Wait for completion. Should complete in 50us
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if(millis() - startTime > 5) { // To wait 5ms just in case
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NRF_TEMP->TASKS_STOP = 1;
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return NAN;
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}
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}
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NRF_TEMP->EVENTS_DATARDY = 0; // Clear event flag
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int32_t temp = NRF_TEMP->TEMP; // In 0.25 *C units
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NRF_TEMP->TASKS_STOP = 1;
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return temp * 0.25f; // Convert to *C
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}
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#endif
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