Driver for new ADC (SAADC) in NRF52 devices.
This commit is contained in:
Konstantin Oblaukhov
parent
a6a380af6a
commit
7fa948e7c6
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ifeq ($(USE_SMART_BUILD),yes)
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ifneq ($(findstring HAL_USE_ADC TRUE,$(HALCONF)),)
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PLATFORMSRC_CONTRIB += ${CHIBIOS_CONTRIB}/os/hal/ports/NRF5/LLD/ADCv2/hal_adc_lld.c
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endif
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else
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PLATFORMSRC_CONTRIB += ${CHIBIOS_CONTRIB}/os/hal/ports/NRF5/LLD/ADCv2/hal_adc_lld.c
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endif
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PLATFORMINC_CONTRIB += ${CHIBIOS_CONTRIB}/os/hal/ports/NRF5/LLD/ADCv2
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/*
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Copyright (C) 2020 Konstantin Oblaukhov
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file hal_adc_lld.c
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* @brief NRF5 ADC subsystem low level driver source.
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*
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* @addtogroup ADC
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* @{
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*/
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#include "hal.h"
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#if (HAL_USE_ADC == TRUE) || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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/**
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* @brief ADC1 driver identifier.
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*/
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#if (NRF5_ADC_USE_ADC1 == TRUE) || defined(__DOXYGEN__)
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ADCDriver ADCD1;
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#endif
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/*===========================================================================*/
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/* Driver local variables and types. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver interrupt handlers. */
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/*===========================================================================*/
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#if NRF5_ADC_USE_ADC1 || defined(__DOXYGEN__)
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/**
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* @brief ADC interrupt handler.
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*
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* @isr
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*/
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OSAL_IRQ_HANDLER(Vector5C) {
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ADCDriver *adcp = &ADCD1;
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NRF_SAADC_Type *adc = adcp->adc;
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const ADCConversionGroup *grpp = adcp->grpp;
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OSAL_IRQ_PROLOGUE();
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if (adc->EVENTS_RESULTDONE) {
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adc->EVENTS_RESULTDONE = 0;
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adcp->ch_counter++;
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if (adcp->ch_counter == grpp->num_channels) {
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adcp->counter++;
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adcp->ch_counter = 0;
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if (grpp->circular &
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(adcp->counter == adcp->depth / 2))
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_adc_isr_half_code(adcp)
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if ((adcp->counter < adcp->depth) && !grpp->external) {
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adc->TASKS_SAMPLE = 1;
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}
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}
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}
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if (adc->EVENTS_END) {
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adc->EVENTS_END = 0;
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_adc_isr_full_code(adcp);
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if (grpp->circular) {
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adcp->counter = 0;
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adcp->ch_counter = 0;
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adc->TASKS_START = 1;
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if (!grpp->external)
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adc->TASKS_SAMPLE = 1;
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} else
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adc_lld_stop_conversion(adcp);
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}
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OSAL_IRQ_EPILOGUE();
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}
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#endif
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief Low level ADC driver initialization.
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*
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* @notapi
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*/
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void adc_lld_init(void) {
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#if NRF5_ADC_USE_ADC1 == TRUE
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/* Driver initialization.*/
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adcObjectInit(&ADCD1);
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ADCD1.adc = NRF_SAADC;
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#endif
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}
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/**
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* @brief Configures and activates the ADC peripheral.
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*
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* @param[in] adcp pointer to the @p ADCDriver object
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*
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* @notapi
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*/
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void adc_lld_start(ADCDriver *adcp) {
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if (adcp->state == ADC_STOP) {
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/* Enables the peripheral.*/
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#if NRF5_ADC_USE_ADC1 == TRUE
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if (&ADCD1 == adcp) {
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adcp->adc->INTEN = SAADC_INTEN_END_Msk | SAADC_INTEN_RESULTDONE_Msk;
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nvicEnableVector(SAADC_IRQn, NRF5_ADC_IRQ_PRIORITY);
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}
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#endif
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}
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/* Configures the peripheral.*/
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}
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/**
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* @brief Deactivates the ADC peripheral.
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*
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* @param[in] adcp pointer to the @p ADCDriver object
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*
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* @notapi
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*/
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void adc_lld_stop(ADCDriver *adcp) {
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if (adcp->state == ADC_READY) {
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/* Resets the peripheral.*/
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/* Disables the peripheral.*/
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#if NRF5_ADC_USE_ADC1 == TRUE
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if (&ADCD1 == adcp) {
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nvicDisableVector(SAADC_IRQn);
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adcp->adc->INTEN = 0;
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}
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#endif
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}
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}
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/**
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* @brief Starts an ADC conversion.
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*
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* @param[in] adcp pointer to the @p ADCDriver object
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*
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* @notapi
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*/
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void adc_lld_start_conversion(ADCDriver *adcp) {
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NRF_SAADC_Type *adc = adcp->adc;
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const ADCConversionGroup *grpp = adcp->grpp;
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adc->RESOLUTION = grpp->resolution;
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adc->OVERSAMPLE = grpp->oversample;
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adc->SAMPLERATE = grpp->samplerate;
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for (int i = 0; i < grpp->num_channels; i++) {
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adc->CH[i].PSELP = grpp->channels[i].pselp;
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adc->CH[i].PSELN = grpp->channels[i].pseln;
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adc->CH[i].CONFIG = grpp->channels[i].config;
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}
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for (int i = grpp->num_channels; i < NRF5_ADC_MAX_CHANNELS; i++) {
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adc->CH[i].PSELP = 0;
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adc->CH[i].PSELN = 0;
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}
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adc->RESULT.PTR = (uint32_t)adcp->samples;
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adc->RESULT.MAXCNT = adcp->depth * grpp->num_channels;
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adcp->counter = 0;
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adcp->ch_counter = 0;
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adc->ENABLE = SAADC_ENABLE_ENABLE_Enabled << SAADC_ENABLE_ENABLE_Pos;
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adc->TASKS_START = 1;
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if (!grpp->external)
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adc->TASKS_SAMPLE = 1;
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}
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/**
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* @brief Stops an ongoing conversion.
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*
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* @param[in] adcp pointer to the @p ADCDriver object
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*
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* @notapi
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*/
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void adc_lld_stop_conversion(ADCDriver *adcp) {
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NRF_SAADC_Type *adc = adcp->adc;
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adc->TASKS_STOP = 1;
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adc->ENABLE = SAADC_ENABLE_ENABLE_Disabled << SAADC_ENABLE_ENABLE_Pos;
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}
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#endif /* HAL_USE_ADC == TRUE */
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/** @} */
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@ -0,0 +1,168 @@
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/*
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Copyright (C) 2020 Konstantin Oblaukhov
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file hal_adc_lld.h
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* @brief NRF5 ADC subsystem low level driver header.
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*
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* @addtogroup ADC
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* @{
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*/
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#ifndef HAL_ADC_LLD_H
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#define HAL_ADC_LLD_H
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#if (HAL_USE_ADC == TRUE) || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver pre-compile time settings. */
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/*===========================================================================*/
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/**
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* @name NRF5 configuration options
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* @{
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*/
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/**
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* @brief ADC1 driver enable switch.
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* @details If set to @p TRUE the support for ADC1 is included.
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* @note The default is @p FALSE.
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*/
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#if !defined(NRF5_ADC_USE_ADC1) || defined(__DOXYGEN__)
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#define NRF5_ADC_USE_ADC1 FALSE
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#endif
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/** @} */
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/**
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* @brief ADC interrupt priority level setting.
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*/
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#if !defined(NRF5_ADC_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define NRF5_ADC_IRQ_PRIORITY (CORTEX_MAX_KERNEL_PRIORITY + 1)
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#endif
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/*===========================================================================*/
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/* Derived constants and error checks. */
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/*===========================================================================*/
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#if !NRF5_ADC_USE_ADC1
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#error "ADC driver activated but no ADC peripheral assigned"
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#endif
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#if !defined(NRF5_ADC_MAX_CHANNELS) || defined(__DOXYGEN__)
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#define NRF5_ADC_MAX_CHANNELS 8
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#endif
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/*===========================================================================*/
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/* Driver data structures and types. */
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/*===========================================================================*/
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/**
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* @brief ADC sample data type.
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*/
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typedef uint16_t adcsample_t;
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/**
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* @brief Channels number in a conversion group.
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*/
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typedef uint8_t adc_channels_num_t;
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/**
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* @brief Possible ADC failure causes.
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* @note Error codes are architecture dependent and should not relied
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* upon.
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*/
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typedef enum {
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ADC_ERR_DMAFAILURE = 0, /**< DMA operations failure. */
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ADC_ERR_OVERFLOW = 1, /**< ADC overflow condition. */
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} adcerror_t;
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/**
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* @brief ADC channel config.
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*/
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struct adc_lld_channel_config {
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/* @brief ADC channel positive pin.*/
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uint8_t pselp;
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/* @brief ADC channel negative pin.*/
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uint8_t pseln;
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/* @brief ADC channel CONFIG register details.*/
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uint32_t config;
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};
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/*===========================================================================*/
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/* Driver macros. */
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/*===========================================================================*/
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/**
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* @brief Low level fields of the ADC driver structure.
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*/
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#define adc_lld_driver_fields \
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/* @brief Pointer to the ADCx registers block.*/ \
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NRF_SAADC_Type *adc; \
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/* @brief Current sample counter.*/ \
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size_t counter; \
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/* @brief Current channel counter.*/ \
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size_t ch_counter
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/**
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* @brief Low level fields of the ADC configuration structure.
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*/
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#define adc_lld_config_fields \
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/* Dummy configuration, it is not needed.*/ \
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uint32_t dummy
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/**
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* @brief Low level fields of the ADC configuration structure.
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*/
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#define adc_lld_configuration_group_fields \
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/* @brief ADC sample is triggered by external source.*/ \
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bool external; \
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/* @brief ADC RESOLUTION register details.*/ \
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uint32_t resolution; \
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/* @brief ADC OVERSAMPLE register details.*/ \
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uint32_t oversample; \
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/* @brief ADC SAMPLERATE register details.*/ \
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uint32_t samplerate; \
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/* @brief ADC channel configurations.*/ \
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struct adc_lld_channel_config channels[NRF5_ADC_MAX_CHANNELS]
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#if (NRF5_ADC_USE_ADC1 == TRUE) && !defined(__DOXYGEN__)
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extern ADCDriver ADCD1;
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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void adc_lld_init(void);
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void adc_lld_start(ADCDriver *adcp);
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void adc_lld_stop(ADCDriver *adcp);
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void adc_lld_start_conversion(ADCDriver *adcp);
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void adc_lld_stop_conversion(ADCDriver *adcp);
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#ifdef __cplusplus
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}
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#endif
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#endif /* HAL_USE_ADC == TRUE */
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#endif /* HAL_ADC_LLD_H */
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/** @} */
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@ -18,6 +18,7 @@ HALCONF := $(strip $(shell cat $(CONFDIR)/halconf.h $(CONFDIR)/halconf_community
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endif
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include ${CHIBIOS_CONTRIB}/os/hal/ports/NRF5/LLD/ADCv2/driver.mk
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include ${CHIBIOS_CONTRIB}/os/hal/ports/NRF5/LLD/GPIOv1/driver.mk
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include ${CHIBIOS_CONTRIB}/os/hal/ports/NRF5/LLD/UARTv1/driver.mk
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include ${CHIBIOS_CONTRIB}/os/hal/ports/NRF5/LLD/SPIv1/driver.mk
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