123 lines
3.9 KiB
C
123 lines
3.9 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2017 Dan Halbert for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "common-hal/microcontroller/Processor.h"
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#include "py/runtime.h"
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#include "supervisor/shared/translate.h"
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#include "nrfx_saadc.h"
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#ifdef BLUETOOTH_SD
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#include "nrf_sdm.h"
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#endif
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#include "nrf.h"
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float common_hal_mcu_processor_get_temperature(void) {
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int32_t temp = 0;
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#ifdef BLUETOOTH_SD
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uint8_t sd_en = 0;
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(void) sd_softdevice_is_enabled(&sd_en);
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if (sd_en) {
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uint32_t err_code = sd_temp_get(&temp);
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if (err_code != NRF_SUCCESS) {
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mp_raise_OSError_msg(translate("Cannot get temperature"));
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}
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return temp / 4.0f;
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} // Fall through if SD not enabled.
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#endif
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NRF_TEMP->TASKS_START = 1;
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while (NRF_TEMP->EVENTS_DATARDY == 0) { }
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NRF_TEMP->EVENTS_DATARDY = 0;
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temp = NRF_TEMP->TEMP;
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NRF_TEMP->TASKS_STOP = 1;
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return temp / 4.0f;
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}
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uint32_t common_hal_mcu_processor_get_frequency(void) {
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return 64000000ul;
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}
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float common_hal_mcu_processor_get_voltage(void) {
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nrf_saadc_value_t value;
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const nrf_saadc_channel_config_t config = {
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.resistor_p = NRF_SAADC_RESISTOR_DISABLED,
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.resistor_n = NRF_SAADC_RESISTOR_DISABLED,
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.gain = NRF_SAADC_GAIN1_6,
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.reference = NRF_SAADC_REFERENCE_INTERNAL,
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.acq_time = NRF_SAADC_ACQTIME_10US,
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.mode = NRF_SAADC_MODE_SINGLE_ENDED,
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.burst = NRF_SAADC_BURST_DISABLED,
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.pin_p = NRF_SAADC_INPUT_VDD,
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.pin_n = NRF_SAADC_INPUT_VDD,
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};
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nrf_saadc_resolution_set(NRF_SAADC_RESOLUTION_14BIT);
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nrf_saadc_oversample_set(NRF_SAADC_OVERSAMPLE_DISABLED);
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nrf_saadc_enable();
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for (uint32_t i = 0; i < NRF_SAADC_CHANNEL_COUNT; i++) {
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nrf_saadc_channel_input_set(i, NRF_SAADC_INPUT_DISABLED, NRF_SAADC_INPUT_DISABLED);
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}
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nrf_saadc_channel_init(0, &config);
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nrf_saadc_buffer_init(&value, 1);
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nrf_saadc_task_trigger(NRF_SAADC_TASK_START);
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while (nrf_saadc_event_check(NRF_SAADC_EVENT_STARTED) == 0) { }
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nrf_saadc_event_clear(NRF_SAADC_EVENT_STARTED);
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nrf_saadc_task_trigger(NRF_SAADC_TASK_SAMPLE);
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while (nrf_saadc_event_check(NRF_SAADC_EVENT_END) == 0) { }
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nrf_saadc_event_clear(NRF_SAADC_EVENT_END);
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nrf_saadc_task_trigger(NRF_SAADC_TASK_STOP);
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while (nrf_saadc_event_check(NRF_SAADC_EVENT_STOPPED) == 0) { }
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nrf_saadc_event_clear(NRF_SAADC_EVENT_STOPPED);
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nrf_saadc_disable();
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if (value < 0) {
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value = 0;
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}
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// The ADC reading we expect if VDD is 3.3V.
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#define NOMINAL_VALUE_3_3 (((3.3f/6)/0.6f)*16383)
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return (value/NOMINAL_VALUE_3_3) * 3.3f;
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}
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void common_hal_mcu_processor_get_uid(uint8_t raw_id[]) {
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for (int i=0; i<2; i++) {
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((uint32_t*) raw_id)[i] = NRF_FICR->DEVICEID[i];
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}
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}
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