diff options
Diffstat (limited to 'ports')
| -rw-r--r-- | ports/nrf/Makefile | 2 | ||||
| -rw-r--r-- | ports/nrf/common-hal/analogio/AnalogIn.c | 105 | ||||
| -rw-r--r-- | ports/nrf/common-hal/analogio/AnalogIn.h | 2 | ||||
| -rw-r--r-- | ports/nrf/hal/hal_adc.c | 129 | ||||
| -rw-r--r-- | ports/nrf/hal/hal_adc.h | 75 | ||||
| -rw-r--r-- | ports/nrf/hal/hal_adce.c | 118 |
6 files changed, 48 insertions, 383 deletions
diff --git a/ports/nrf/Makefile b/ports/nrf/Makefile index 7a9ce5848..936cde21b 100644 --- a/ports/nrf/Makefile +++ b/ports/nrf/Makefile @@ -95,8 +95,6 @@ SRC_HAL = $(addprefix hal/,\ hal_time.c \ hal_timer.c \ hal_twi.c \ - hal_adc.c \ - hal_adce.c \ hal_gpio.c \ hal_rng.c \ hal_pwm.c \ diff --git a/ports/nrf/common-hal/analogio/AnalogIn.c b/ports/nrf/common-hal/analogio/AnalogIn.c index 9923e62f5..043f66852 100644 --- a/ports/nrf/common-hal/analogio/AnalogIn.c +++ b/ports/nrf/common-hal/analogio/AnalogIn.c @@ -4,6 +4,7 @@ * The MIT License (MIT) * * Copyright (c) 2016 Scott Shawcroft for Adafruit Industries + * Copyright (c) 2018 Artur Pacholec * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal @@ -25,24 +26,19 @@ */ #include "common-hal/analogio/AnalogIn.h" +#include "py/runtime.h" -#include <string.h> +#include "nrfx_saadc.h" +#include "nrf_gpio.h" -#include "py/gc.h" -#include "py/nlr.h" -#include "py/runtime.h" -#include "py/binary.h" -#include "py/mphal.h" -#include "shared-bindings/analogio/AnalogIn.h" -#include "nrf.h" - -void common_hal_analogio_analogin_construct(analogio_analogin_obj_t* self, const mcu_pin_obj_t *pin) { - if (!pin->adc_channel) { - // No ADC function on that pin +#define CHANNEL_NO 0 + +void common_hal_analogio_analogin_construct(analogio_analogin_obj_t *self, const mcu_pin_obj_t *pin) { + if (pin->adc_channel == 0) mp_raise_ValueError("Pin does not have ADC capabilities"); - } hal_gpio_cfg_pin(pin->port, pin->pin, HAL_GPIO_MODE_INPUT, HAL_GPIO_PULL_DISABLED); + self->pin = pin; } @@ -51,66 +47,61 @@ bool common_hal_analogio_analogin_deinited(analogio_analogin_obj_t *self) { } void common_hal_analogio_analogin_deinit(analogio_analogin_obj_t *self) { - if (common_hal_analogio_analogin_deinited(self)) { + if (common_hal_analogio_analogin_deinited(self)) return; - } - reset_pin(self->pin->pin); - self->pin = mp_const_none; -} -void analogin_reset() { + nrf_gpio_cfg_default(NRF_GPIO_PIN_MAP(self->pin->port, self->pin->pin)); + + self->pin = mp_const_none; } uint16_t common_hal_analogio_analogin_get_value(analogio_analogin_obj_t *self) { - // Something else might have used the ADC in a different way, - // so we completely re-initialize it. - - int16_t value; - - NRF_SAADC->RESOLUTION = SAADC_RESOLUTION_VAL_14bit; - NRF_SAADC->ENABLE = 1; - - for (int i = 0; i < 8; i++) { - NRF_SAADC->CH[i].PSELN = SAADC_CH_PSELP_PSELP_NC; - NRF_SAADC->CH[i].PSELP = SAADC_CH_PSELP_PSELP_NC; - } - - NRF_SAADC->CH[0].CONFIG = ((SAADC_CH_CONFIG_RESP_Bypass << SAADC_CH_CONFIG_RESP_Pos) & SAADC_CH_CONFIG_RESP_Msk) - | ((SAADC_CH_CONFIG_RESP_Bypass << SAADC_CH_CONFIG_RESN_Pos) & SAADC_CH_CONFIG_RESN_Msk) - | ((SAADC_CH_CONFIG_GAIN_Gain1_6 << SAADC_CH_CONFIG_GAIN_Pos) & SAADC_CH_CONFIG_GAIN_Msk) - | ((SAADC_CH_CONFIG_REFSEL_Internal << SAADC_CH_CONFIG_REFSEL_Pos) & SAADC_CH_CONFIG_REFSEL_Msk) - | ((SAADC_CH_CONFIG_TACQ_3us << SAADC_CH_CONFIG_TACQ_Pos) & SAADC_CH_CONFIG_TACQ_Msk) - | ((SAADC_CH_CONFIG_MODE_SE << SAADC_CH_CONFIG_MODE_Pos) & SAADC_CH_CONFIG_MODE_Msk); - NRF_SAADC->CH[0].PSELN = self->pin->adc_channel; - NRF_SAADC->CH[0].PSELP = self->pin->adc_channel; + // Something else might have used the ADC in a different way, + // so we completely re-initialize it. + nrf_saadc_value_t value; - NRF_SAADC->RESULT.PTR = (uint32_t)&value; - NRF_SAADC->RESULT.MAXCNT = 1; + const nrf_saadc_channel_config_t config = { + .resistor_p = NRF_SAADC_RESISTOR_DISABLED, + .resistor_n = NRF_SAADC_RESISTOR_DISABLED, + .gain = NRF_SAADC_GAIN1_6, + .reference = NRF_SAADC_REFERENCE_INTERNAL, + .acq_time = NRF_SAADC_ACQTIME_3US, + .mode = NRF_SAADC_MODE_SINGLE_ENDED, + .burst = NRF_SAADC_BURST_DISABLED, + .pin_p = self->pin->adc_channel, + .pin_n = self->pin->adc_channel, + }; - NRF_SAADC->TASKS_START = 0x01UL; + nrf_saadc_resolution_set(NRF_SAADC_RESOLUTION_14BIT); + nrf_saadc_oversample_set(NRF_SAADC_OVERSAMPLE_DISABLED); + nrf_saadc_enable(); - while (!NRF_SAADC->EVENTS_STARTED); - NRF_SAADC->EVENTS_STARTED = 0x00UL; + for (uint32_t i = 0; i < NRF_SAADC_CHANNEL_COUNT; i++) + nrf_saadc_channel_input_set(i, NRF_SAADC_INPUT_DISABLED, NRF_SAADC_INPUT_DISABLED); - NRF_SAADC->TASKS_SAMPLE = 0x01UL; + nrf_saadc_channel_init(CHANNEL_NO, &config); + nrf_saadc_buffer_init(&value, 1); - while (!NRF_SAADC->EVENTS_END); - NRF_SAADC->EVENTS_END = 0x00UL; + nrf_saadc_task_trigger(NRF_SAADC_TASK_START); + while (nrf_saadc_event_check(NRF_SAADC_EVENT_STARTED) == 0); + nrf_saadc_event_clear(NRF_SAADC_EVENT_STARTED); - NRF_SAADC->TASKS_STOP = 0x01UL; + nrf_saadc_task_trigger(NRF_SAADC_TASK_SAMPLE); + while (nrf_saadc_event_check(NRF_SAADC_EVENT_END) == 0); + nrf_saadc_event_clear(NRF_SAADC_EVENT_END); - while (!NRF_SAADC->EVENTS_STOPPED); - NRF_SAADC->EVENTS_STOPPED = 0x00UL; + nrf_saadc_task_trigger(NRF_SAADC_TASK_STOP); + while (nrf_saadc_event_check(NRF_SAADC_EVENT_STOPPED) == 0); + nrf_saadc_event_clear(NRF_SAADC_EVENT_STOPPED); - if (value < 0) { - value = 0; - } + nrf_saadc_disable(); - NRF_SAADC->ENABLE = 0; + if (value < 0) + value = 0; - // Map value to from 14 to 16 bits - return (value << 2); + // Map value to from 14 to 16 bits + return (value << 2); } float common_hal_analogio_analogin_get_reference_voltage(analogio_analogin_obj_t *self) { diff --git a/ports/nrf/common-hal/analogio/AnalogIn.h b/ports/nrf/common-hal/analogio/AnalogIn.h index 95f599e71..e0e95bad4 100644 --- a/ports/nrf/common-hal/analogio/AnalogIn.h +++ b/ports/nrf/common-hal/analogio/AnalogIn.h @@ -36,6 +36,4 @@ typedef struct { const mcu_pin_obj_t * pin; } analogio_analogin_obj_t; -void analogin_reset(void); - #endif // MICROPY_INCLUDED_NRF_COMMON_HAL_ANALOGIO_ANALOGIN_H diff --git a/ports/nrf/hal/hal_adc.c b/ports/nrf/hal/hal_adc.c deleted file mode 100644 index a6cf45391..000000000 --- a/ports/nrf/hal/hal_adc.c +++ /dev/null @@ -1,129 +0,0 @@ -/* - * This file is part of the MicroPython project, http://micropython.org/ - * - * The MIT License (MIT) - * - * Copyright (c) 2017 Glenn Ruben Bakke - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -#include <stdio.h> -#include "mphalport.h" -#include "hal_adc.h" - -#ifdef HAL_ADC_MODULE_ENABLED - -#define ADC_REF_VOLTAGE_IN_MILLIVOLTS (1200) // Reference voltage (in milli volts) used by ADC while doing conversion. -#define ADC_PRE_SCALING_COMPENSATION (3) // The ADC is configured to use VDD with 1/3 prescaling as input. And hence the result of conversion is to be multiplied by 3 to get the actual value of the battery voltage. -#define DIODE_FWD_VOLT_DROP_MILLIVOLTS (270) // Typical forward voltage drop of the diode (Part no: SD103ATW-7-F) that is connected in series with the voltage supply. This is the voltage drop when the forward current is 1mA. Source: Data sheet of 'SURFACE MOUNT SCHOTTKY BARRIER DIODE ARRAY' available at www.diodes.com. - -#define ADC_RESULT_IN_MILLI_VOLTS(ADC_VALUE)\ - ((((ADC_VALUE) * ADC_REF_VOLTAGE_IN_MILLIVOLTS) / 255) * ADC_PRE_SCALING_COMPENSATION) - -static const uint32_t hal_adc_input_lookup[] = { - ADC_CONFIG_PSEL_AnalogInput0 << ADC_CONFIG_PSEL_Pos, - ADC_CONFIG_PSEL_AnalogInput1 << ADC_CONFIG_PSEL_Pos, - ADC_CONFIG_PSEL_AnalogInput2 << ADC_CONFIG_PSEL_Pos, - ADC_CONFIG_PSEL_AnalogInput3 << ADC_CONFIG_PSEL_Pos, - ADC_CONFIG_PSEL_AnalogInput4 << ADC_CONFIG_PSEL_Pos, - ADC_CONFIG_PSEL_AnalogInput5 << ADC_CONFIG_PSEL_Pos, - ADC_CONFIG_PSEL_AnalogInput6 << ADC_CONFIG_PSEL_Pos, - ADC_CONFIG_PSEL_AnalogInput7 << ADC_CONFIG_PSEL_Pos -}; - - -static uint8_t battery_level_in_percent(const uint16_t mvolts) -{ - uint8_t battery_level; - - if (mvolts >= 3000) { - battery_level = 100; - } else if (mvolts > 2900) { - battery_level = 100 - ((3000 - mvolts) * 58) / 100; - } else if (mvolts > 2740) { - battery_level = 42 - ((2900 - mvolts) * 24) / 160; - } else if (mvolts > 2440) { - battery_level = 18 - ((2740 - mvolts) * 12) / 300; - } else if (mvolts > 2100) { - battery_level = 6 - ((2440 - mvolts) * 6) / 340; - } else { - battery_level = 0; - } - - return battery_level; -} - -uint16_t hal_adc_channel_value(hal_adc_config_t const * p_adc_conf) { - ADC_BASE->INTENSET = ADC_INTENSET_END_Msk; - ADC_BASE->CONFIG = (ADC_CONFIG_RES_8bit << ADC_CONFIG_RES_Pos) - | (ADC_CONFIG_INPSEL_AnalogInputTwoThirdsPrescaling << ADC_CONFIG_INPSEL_Pos) - | (ADC_CONFIG_REFSEL_VBG << ADC_CONFIG_REFSEL_Pos) - | (hal_adc_input_lookup[p_adc_conf->channel]) - | (ADC_CONFIG_EXTREFSEL_None << ADC_CONFIG_EXTREFSEL_Pos); - - ADC_BASE->EVENTS_END = 0; - ADC_BASE->ENABLE = ADC_ENABLE_ENABLE_Enabled; - - ADC_BASE->EVENTS_END = 0; - ADC_BASE->TASKS_START = 1; - - while (!ADC_BASE->EVENTS_END) { - ; - } - - uint8_t adc_result; - - ADC_BASE->EVENTS_END = 0; - adc_result = ADC_BASE->RESULT; - ADC_BASE->TASKS_STOP = 1; - - return adc_result; -} - -uint16_t hal_adc_battery_level(void) { - ADC_BASE->INTENSET = ADC_INTENSET_END_Msk; - ADC_BASE->CONFIG = (ADC_CONFIG_RES_8bit << ADC_CONFIG_RES_Pos) - | (ADC_CONFIG_INPSEL_SupplyOneThirdPrescaling << ADC_CONFIG_INPSEL_Pos) - | (ADC_CONFIG_REFSEL_VBG << ADC_CONFIG_REFSEL_Pos) - | (ADC_CONFIG_PSEL_Disabled << ADC_CONFIG_PSEL_Pos) - | (ADC_CONFIG_EXTREFSEL_None << ADC_CONFIG_EXTREFSEL_Pos); - - ADC_BASE->EVENTS_END = 0; - ADC_BASE->ENABLE = ADC_ENABLE_ENABLE_Enabled; - - ADC_BASE->EVENTS_END = 0; - ADC_BASE->TASKS_START = 1; - - while (!ADC_BASE->EVENTS_END) { - ; - } - - uint8_t adc_result; - uint16_t batt_lvl_in_milli_volts; - - ADC_BASE->EVENTS_END = 0; - adc_result = ADC_BASE->RESULT; - ADC_BASE->TASKS_STOP = 1; - - batt_lvl_in_milli_volts = ADC_RESULT_IN_MILLI_VOLTS(adc_result) + DIODE_FWD_VOLT_DROP_MILLIVOLTS; - return battery_level_in_percent(batt_lvl_in_milli_volts); -} - -#endif // HAL_ADC_MODULE_ENABLED diff --git a/ports/nrf/hal/hal_adc.h b/ports/nrf/hal/hal_adc.h deleted file mode 100644 index 76ed7e661..000000000 --- a/ports/nrf/hal/hal_adc.h +++ /dev/null @@ -1,75 +0,0 @@ -/* - * This file is part of the MicroPython project, http://micropython.org/ - * - * The MIT License (MIT) - * - * Copyright (c) 2017 Glenn Ruben Bakke - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -#ifndef HAL_ADC_H__ -#define HAL_ADC_H__ - -#include <stdint.h> - -#include "nrf.h" - -#if NRF51 - -#define ADC_IRQ_NUM ADC_IRQn -#define ADC_BASE ((NRF_ADC_Type *)NRF_ADC_BASE) -#define HAL_ADC_Type NRF_ADC_Type - -#else - -#define ADC_IRQ_NUM SAADC_IRQn -#define ADC_BASE ((NRF_SAADC_Type *)NRF_SAADC_BASE) -#define HAL_ADC_Type NRF_SAADC_Type - -#endif - -typedef enum { - HAL_ADC_CHANNEL_2 = 2, - HAL_ADC_CHANNEL_3, - HAL_ADC_CHANNEL_4, - HAL_ADC_CHANNEL_5, - HAL_ADC_CHANNEL_6, - HAL_ADC_CHANNEL_7, -} hal_adc_channel_t; - -/** - * @brief ADC Configuration Structure definition - */ -typedef struct { - hal_adc_channel_t channel; -} hal_adc_config_t; - -/** - * @brief ADC handle Structure definition - */ -typedef struct __ADC_HandleTypeDef { - hal_adc_config_t config; /* ADC config parameters */ -} ADC_HandleTypeDef; - -uint16_t hal_adc_channel_value(hal_adc_config_t const * p_adc_conf); - -uint16_t hal_adc_battery_level(void); - -#endif // HAL_ADC_H__ diff --git a/ports/nrf/hal/hal_adce.c b/ports/nrf/hal/hal_adce.c deleted file mode 100644 index 0abdf07c3..000000000 --- a/ports/nrf/hal/hal_adce.c +++ /dev/null @@ -1,118 +0,0 @@ -/* - * This file is part of the MicroPython project, http://micropython.org/ - * - * The MIT License (MIT) - * - * Copyright (c) 2017 Glenn Ruben Bakke - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -#include "mphalport.h" -#include "hal_adc.h" - -#ifdef HAL_ADCE_MODULE_ENABLED - -static const uint32_t hal_adc_input_lookup_pos[] = { - SAADC_CH_PSELP_PSELP_AnalogInput0 << SAADC_CH_PSELP_PSELP_Pos, - SAADC_CH_PSELP_PSELP_AnalogInput1 << SAADC_CH_PSELP_PSELP_Pos, - SAADC_CH_PSELP_PSELP_AnalogInput2 << SAADC_CH_PSELP_PSELP_Pos, - SAADC_CH_PSELP_PSELP_AnalogInput3 << SAADC_CH_PSELP_PSELP_Pos, - SAADC_CH_PSELP_PSELP_AnalogInput4 << SAADC_CH_PSELP_PSELP_Pos, - SAADC_CH_PSELP_PSELP_AnalogInput5 << SAADC_CH_PSELP_PSELP_Pos, - SAADC_CH_PSELP_PSELP_AnalogInput6 << SAADC_CH_PSELP_PSELP_Pos, - SAADC_CH_PSELP_PSELP_AnalogInput7 << SAADC_CH_PSELP_PSELP_Pos -}; - -#define HAL_ADCE_PSELP_NOT_CONNECTED (SAADC_CH_PSELP_PSELP_NC << SAADC_CH_PSELP_PSELP_Pos) -#define HAL_ADCE_PSELP_VDD (SAADC_CH_PSELP_PSELP_VDD << SAADC_CH_PSELP_PSELP_Pos) - -/*static const uint32_t hal_adc_input_lookup_neg[] = { - SAADC_CH_PSELN_PSELN_AnalogInput0 << SAADC_CH_PSELN_PSELN_Pos, - SAADC_CH_PSELN_PSELN_AnalogInput1 << SAADC_CH_PSELN_PSELN_Pos, - SAADC_CH_PSELN_PSELN_AnalogInput2 << SAADC_CH_PSELN_PSELN_Pos, - SAADC_CH_PSELN_PSELN_AnalogInput3 << SAADC_CH_PSELN_PSELN_Pos, - SAADC_CH_PSELN_PSELN_AnalogInput4 << SAADC_CH_PSELN_PSELN_Pos, - SAADC_CH_PSELN_PSELN_AnalogInput5 << SAADC_CH_PSELN_PSELN_Pos, - SAADC_CH_PSELN_PSELN_AnalogInput6 << SAADC_CH_PSELN_PSELN_Pos, - SAADC_CH_PSELN_PSELN_AnalogInput7 << SAADC_CH_PSELN_PSELN_Pos -};*/ - -#define HAL_ADCE_PSELN_NOT_CONNECTED (SAADC_CH_PSELN_PSELN_NC << SAADC_CH_PSELN_PSELN_Pos) -#define HAL_ADCE_PSELN_VDD (SAADC_CH_PSELN_PSELN_VDD << SAADC_CH_PSELN_PSELN_Pos) - -uint16_t hal_adc_channel_value(hal_adc_config_t const * p_adc_conf) { - int16_t result = 0; - - // configure to use VDD/4 and gain 1/4 - ADC_BASE->CH[0].CONFIG = (SAADC_CH_CONFIG_GAIN_Gain1_4 << SAADC_CH_CONFIG_GAIN_Pos) - | (SAADC_CH_CONFIG_MODE_SE << SAADC_CH_CONFIG_MODE_Pos) - | (SAADC_CH_CONFIG_REFSEL_VDD1_4 << SAADC_CH_CONFIG_REFSEL_Pos) - | (SAADC_CH_CONFIG_RESN_Bypass << SAADC_CH_CONFIG_RESN_Pos) - | (SAADC_CH_CONFIG_RESP_Bypass << SAADC_CH_CONFIG_RESP_Pos) - | (SAADC_CH_CONFIG_TACQ_3us << SAADC_CH_CONFIG_TACQ_Pos); - - // positive input - ADC_BASE->CH[0].PSELP = hal_adc_input_lookup_pos[p_adc_conf->channel]; // HAL_ADCE_PSELP_VDD; - ADC_BASE->CH[0].PSELN = HAL_ADCE_PSELN_NOT_CONNECTED; - - ADC_BASE->RESOLUTION = SAADC_RESOLUTION_VAL_8bit << SAADC_RESOLUTION_VAL_Pos; - ADC_BASE->RESULT.MAXCNT = 1; - ADC_BASE->RESULT.PTR = (uint32_t)&result; - ADC_BASE->SAMPLERATE = SAADC_SAMPLERATE_MODE_Task << SAADC_SAMPLERATE_MODE_Pos; - ADC_BASE->ENABLE = SAADC_ENABLE_ENABLE_Enabled << SAADC_ENABLE_ENABLE_Pos; - - // calibrate ADC - ADC_BASE->TASKS_CALIBRATEOFFSET = 1; - while (ADC_BASE->EVENTS_CALIBRATEDONE == 0) { - ; - } - ADC_BASE->EVENTS_CALIBRATEDONE = 0; - while (ADC_BASE->STATUS == (SAADC_STATUS_STATUS_Busy << SAADC_STATUS_STATUS_Pos)) { - ; - } - - // start the ADC - ADC_BASE->TASKS_START = 1; - while (ADC_BASE->EVENTS_STARTED == 0) { - ; - } - ADC_BASE->EVENTS_STARTED = 0; - - // sample ADC - ADC_BASE->TASKS_SAMPLE = 1; - while (ADC_BASE->EVENTS_END == 0) { - ; - } - ADC_BASE->EVENTS_END = 0; - - ADC_BASE->TASKS_STOP = 1; - while (ADC_BASE->EVENTS_STOPPED == 0) { - ; - } - ADC_BASE->EVENTS_STOPPED = 0; - - return result; -} - -uint16_t hal_adc_battery_level(void) { - return 0; -} - -#endif // HAL_ADCE_MODULE_ENABLED |