/** * Copyright (c) 2015 - 2017, Nordic Semiconductor ASA * * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form, except as embedded into a Nordic * Semiconductor ASA integrated circuit in a product or a software update for * such product, must reproduce the above copyright notice, this list of * conditions and the following disclaimer in the documentation and/or other * materials provided with the distribution. * * 3. Neither the name of Nordic Semiconductor ASA nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * 4. This software, with or without modification, must only be used with a * Nordic Semiconductor ASA integrated circuit. * * 5. Any software provided in binary form under this license must not be reverse * engineered, decompiled, modified and/or disassembled. * * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #include "sdk_common.h" #if NRF_MODULE_ENABLED(SAADC) #include "nrf_drv_saadc.h" #include "nrf_assert.h" #include "nrf_drv_common.h" #include "app_util_platform.h" #define NRF_LOG_MODULE_NAME "SAADC" #if SAADC_CONFIG_LOG_ENABLED #define NRF_LOG_LEVEL SAADC_CONFIG_LOG_LEVEL #define NRF_LOG_INFO_COLOR SAADC_CONFIG_INFO_COLOR #define NRF_LOG_DEBUG_COLOR SAADC_CONFIG_DEBUG_COLOR #define EVT_TO_STR(event) (event == NRF_SAADC_EVENT_STARTED ? "NRF_SAADC_EVENT_STARTED" : \ (event == NRF_SAADC_EVENT_END ? "NRF_SAADC_EVENT_END" : \ (event == NRF_SAADC_EVENT_DONE ? "NRF_SAADC_EVENT_DONE" : \ (event == NRF_SAADC_EVENT_RESULTDONE ? "NRF_SAADC_EVENT_RESULTDONE" : \ (event == NRF_SAADC_EVENT_CALIBRATEDONE ? "NRF_SAADC_EVENT_CALIBRATEDONE" : \ (event == NRF_SAADC_EVENT_STOPPED ? "NRF_SAADC_EVENT_STOPPED" : "UNKNOWN EVENT")))))) #define EVT_TO_STR_LIMIT(event) (event == NRF_SAADC_LIMIT_LOW ? "NRF_SAADC_LIMIT_LOW" : \ (event == NRF_SAADC_LIMIT_HIGH ? "NRF_SAADC_LIMIT_HIGH" : "UNKNOWN EVENT")) #else //SAADC_CONFIG_LOG_ENABLED #define EVT_TO_STR(event) "" #define NRF_LOG_LEVEL 0 #endif //SAADC_CONFIG_LOG_ENABLED #include "nrf_log.h" #include "nrf_log_ctrl.h" typedef enum { NRF_SAADC_STATE_IDLE = 0, NRF_SAADC_STATE_BUSY = 1, NRF_SAADC_STATE_CALIBRATION = 2 } nrf_saadc_state_t; typedef struct { nrf_saadc_input_t pselp; nrf_saadc_input_t pseln; } nrf_saadc_psel_buffer; static const nrf_drv_saadc_config_t m_default_config = NRF_DRV_SAADC_DEFAULT_CONFIG; /** @brief SAADC control block.*/ typedef struct { nrf_drv_saadc_event_handler_t event_handler; ///< Event handler function pointer. volatile nrf_saadc_value_t * p_buffer; ///< Sample buffer. volatile uint16_t buffer_size; ///< Size of the sample buffer. volatile nrf_saadc_value_t * p_secondary_buffer; ///< Secondary sample buffer. volatile nrf_saadc_state_t adc_state; ///< State of the SAADC. uint32_t limits_enabled_flags; ///< Enabled limits flags. uint16_t secondary_buffer_size; ///< Size of the secondary buffer. uint16_t buffer_size_left; ///< When low power mode is active indicates how many samples left to convert on current buffer. nrf_saadc_psel_buffer psel[NRF_SAADC_CHANNEL_COUNT]; ///< Pin configurations of SAADC channels. nrf_drv_state_t state; ///< Driver initialization state. uint8_t active_channels; ///< Number of enabled SAADC channels. bool low_power_mode; ///< Indicates if low power mode is active. bool conversions_end; ///< When low power mode is active indicates end of conversions on current buffer. } nrf_drv_saadc_cb_t; static nrf_drv_saadc_cb_t m_cb; #define LOW_LIMIT_TO_FLAG(channel) ((2 * channel + 1)) #define HIGH_LIMIT_TO_FLAG(channel) ((2 * channel)) #define FLAG_IDX_TO_EVENT(idx) ((nrf_saadc_event_t)((uint32_t)NRF_SAADC_EVENT_CH0_LIMITH + \ 4 * idx)) #define LIMIT_EVENT_TO_CHANNEL(event) (uint8_t)(((uint32_t)event - \ (uint32_t)NRF_SAADC_EVENT_CH0_LIMITH) / 8) #define LIMIT_EVENT_TO_LIMIT_TYPE(event)((((uint32_t)event - (uint32_t)NRF_SAADC_EVENT_CH0_LIMITH) & 4) \ ? NRF_SAADC_LIMIT_LOW : NRF_SAADC_LIMIT_HIGH) #define HW_TIMEOUT 10000 void SAADC_IRQHandler(void) { if (nrf_saadc_event_check(NRF_SAADC_EVENT_END)) { nrf_saadc_event_clear(NRF_SAADC_EVENT_END); NRF_LOG_DEBUG("Event: %s.\r\n", (uint32_t)EVT_TO_STR(NRF_SAADC_EVENT_END)); if (!m_cb.low_power_mode || m_cb.conversions_end) { nrf_drv_saadc_evt_t evt; evt.type = NRF_DRV_SAADC_EVT_DONE; evt.data.done.p_buffer = (nrf_saadc_value_t *)m_cb.p_buffer; evt.data.done.size = m_cb.buffer_size; if (m_cb.p_secondary_buffer == NULL) { m_cb.adc_state = NRF_SAADC_STATE_IDLE; } else { m_cb.buffer_size_left = m_cb.secondary_buffer_size; m_cb.p_buffer = m_cb.p_secondary_buffer; m_cb.buffer_size = m_cb.secondary_buffer_size; m_cb.p_secondary_buffer = NULL; if (!m_cb.low_power_mode) { nrf_saadc_task_trigger(NRF_SAADC_TASK_START); } } m_cb.event_handler(&evt); m_cb.conversions_end = false; } } if (m_cb.low_power_mode && nrf_saadc_event_check(NRF_SAADC_EVENT_STARTED)) { nrf_saadc_event_clear(NRF_SAADC_EVENT_STARTED); NRF_LOG_DEBUG("Event: %s.\r\n", (uint32_t)EVT_TO_STR(NRF_SAADC_EVENT_STARTED)); if (m_cb.buffer_size_left > m_cb.active_channels) { // More samples to convert than for single event. m_cb.buffer_size_left -= m_cb.active_channels; nrf_saadc_buffer_init((nrf_saadc_value_t *)&m_cb.p_buffer[m_cb.buffer_size - m_cb.buffer_size_left], m_cb.active_channels); } else if ((m_cb.buffer_size_left == m_cb.active_channels) && (m_cb.p_secondary_buffer != NULL)) { // Samples to convert for one event, prepare next buffer. m_cb.conversions_end = true; m_cb.buffer_size_left = 0; nrf_saadc_buffer_init((nrf_saadc_value_t *)m_cb.p_secondary_buffer, m_cb.active_channels); } else if (m_cb.buffer_size_left == m_cb.active_channels) { // Samples to convert for one event, but no second buffer. m_cb.conversions_end = true; m_cb.buffer_size_left = 0; } nrf_saadc_event_clear(NRF_SAADC_EVENT_END); nrf_saadc_task_trigger(NRF_SAADC_TASK_SAMPLE); } if (nrf_saadc_event_check(NRF_SAADC_EVENT_CALIBRATEDONE)) { nrf_saadc_event_clear(NRF_SAADC_EVENT_CALIBRATEDONE); NRF_LOG_DEBUG("Event: %s.\r\n", (uint32_t)EVT_TO_STR(NRF_SAADC_EVENT_CALIBRATEDONE)); m_cb.adc_state = NRF_SAADC_STATE_IDLE; nrf_drv_saadc_evt_t evt; evt.type = NRF_DRV_SAADC_EVT_CALIBRATEDONE; m_cb.event_handler(&evt); } if (nrf_saadc_event_check(NRF_SAADC_EVENT_STOPPED)) { nrf_saadc_event_clear(NRF_SAADC_EVENT_STOPPED); NRF_LOG_DEBUG("Event: %s.\r\n", (uint32_t)EVT_TO_STR(NRF_SAADC_EVENT_STOPPED)); m_cb.adc_state = NRF_SAADC_STATE_IDLE; } else { uint32_t limit_flags = m_cb.limits_enabled_flags; uint32_t flag_idx; nrf_saadc_event_t event; while (limit_flags) { flag_idx = __CLZ(limit_flags); limit_flags &= ~((1UL << 31) >> flag_idx); event = FLAG_IDX_TO_EVENT(flag_idx); if (nrf_saadc_event_check(event)) { nrf_saadc_event_clear(event); nrf_drv_saadc_evt_t evt; evt.type = NRF_DRV_SAADC_EVT_LIMIT; evt.data.limit.channel = LIMIT_EVENT_TO_CHANNEL(event); evt.data.limit.limit_type = LIMIT_EVENT_TO_LIMIT_TYPE(event); NRF_LOG_DEBUG("Event limit, channel: %d, limit type: %s.\r\n", evt.data.limit.channel, (uint32_t)EVT_TO_STR(evt.data.limit.limit_type)); m_cb.event_handler(&evt); } } } } ret_code_t nrf_drv_saadc_init(nrf_drv_saadc_config_t const * p_config, nrf_drv_saadc_event_handler_t event_handler) { ret_code_t err_code; if (m_cb.state != NRF_DRV_STATE_UNINITIALIZED) { err_code = NRF_ERROR_INVALID_STATE; NRF_LOG_WARNING("Function: %s, error code: %s.\r\n", (uint32_t)__func__, (uint32_t)NRF_LOG_ERROR_STRING_GET(err_code)); return err_code; } if (event_handler == NULL) { err_code = NRF_ERROR_INVALID_PARAM; NRF_LOG_WARNING("Function: %s, error code: %s.\r\n", (uint32_t)__func__, (uint32_t)NRF_LOG_ERROR_STRING_GET(err_code)); return err_code; } if (p_config == NULL) { p_config = &m_default_config; } m_cb.event_handler = event_handler; nrf_saadc_resolution_set(p_config->resolution); nrf_saadc_oversample_set(p_config->oversample); m_cb.low_power_mode = p_config->low_power_mode; m_cb.state = NRF_DRV_STATE_INITIALIZED; m_cb.adc_state = NRF_SAADC_STATE_IDLE; m_cb.active_channels = 0; m_cb.limits_enabled_flags = 0; m_cb.conversions_end = false; nrf_saadc_int_disable(NRF_SAADC_INT_ALL); nrf_saadc_event_clear(NRF_SAADC_EVENT_END); nrf_saadc_event_clear(NRF_SAADC_EVENT_STARTED); nrf_drv_common_irq_enable(SAADC_IRQn, p_config->interrupt_priority); nrf_saadc_int_enable(NRF_SAADC_INT_END); if (m_cb.low_power_mode) { nrf_saadc_int_enable(NRF_SAADC_INT_STARTED); } nrf_saadc_enable(); err_code = NRF_SUCCESS; NRF_LOG_INFO("Function: %s, error code: %s.\r\n", (uint32_t)__func__, (uint32_t)NRF_LOG_ERROR_STRING_GET(err_code)); return err_code; } void nrf_drv_saadc_uninit(void) { ASSERT(m_cb.state != NRF_DRV_STATE_UNINITIALIZED); nrf_saadc_int_disable(NRF_SAADC_INT_ALL); nrf_drv_common_irq_disable(SAADC_IRQn); nrf_saadc_task_trigger(NRF_SAADC_TASK_STOP); // Wait for ADC being stopped. uint32_t timeout = HW_TIMEOUT; while (nrf_saadc_event_check(NRF_SAADC_EVENT_STOPPED) == 0 && timeout > 0) { --timeout; } ASSERT(timeout > 0); nrf_saadc_disable(); m_cb.adc_state = NRF_SAADC_STATE_IDLE; for (uint32_t channel = 0; channel < NRF_SAADC_CHANNEL_COUNT; ++channel) { if (m_cb.psel[channel].pselp != NRF_SAADC_INPUT_DISABLED) { (void)nrf_drv_saadc_channel_uninit(channel); } } m_cb.state = NRF_DRV_STATE_UNINITIALIZED; } ret_code_t nrf_drv_saadc_channel_init(uint8_t channel, nrf_saadc_channel_config_t const * const p_config) { ASSERT(m_cb.state != NRF_DRV_STATE_UNINITIALIZED); ASSERT(channel < NRF_SAADC_CHANNEL_COUNT); // Oversampling can be used only with one channel. ASSERT((nrf_saadc_oversample_get() == NRF_SAADC_OVERSAMPLE_DISABLED) || (m_cb.active_channels == 0)); ASSERT((p_config->pin_p <= NRF_SAADC_INPUT_VDD) && (p_config->pin_p > NRF_SAADC_INPUT_DISABLED)); ASSERT(p_config->pin_n <= NRF_SAADC_INPUT_VDD); ret_code_t err_code; // A channel can only be initialized if the driver is in the idle state. if (m_cb.adc_state != NRF_SAADC_STATE_IDLE) { err_code = NRF_ERROR_BUSY; NRF_LOG_WARNING("Function: %s, error code: %s.\r\n", (uint32_t)__func__, (uint32_t)NRF_LOG_ERROR_STRING_GET(err_code)); return err_code; } #ifdef NRF52_PAN_74 if ((p_config->acq_time == NRF_SAADC_ACQTIME_3US) || (p_config->acq_time == NRF_SAADC_ACQTIME_5US)) { nrf_saadc_disable(); } #endif //NRF52_PAN_74 if (!m_cb.psel[channel].pselp) { ++m_cb.active_channels; } m_cb.psel[channel].pselp = p_config->pin_p; m_cb.psel[channel].pseln = p_config->pin_n; nrf_saadc_channel_init(channel, p_config); nrf_saadc_channel_input_set(channel, p_config->pin_p, p_config->pin_n); #ifdef NRF52_PAN_74 if ((p_config->acq_time == NRF_SAADC_ACQTIME_3US) || (p_config->acq_time == NRF_SAADC_ACQTIME_5US)) { nrf_saadc_enable(); } #endif //NRF52_PAN_74 NRF_LOG_INFO("Channel initialized: %d.\r\n", channel); err_code = NRF_SUCCESS; NRF_LOG_INFO("Function: %s, error code: %s.\r\n", (uint32_t)__func__, (uint32_t)NRF_LOG_ERROR_STRING_GET(err_code)); return err_code; } ret_code_t nrf_drv_saadc_channel_uninit(uint8_t channel) { ASSERT(channel < NRF_SAADC_CHANNEL_COUNT) ASSERT(m_cb.state != NRF_DRV_STATE_UNINITIALIZED); ret_code_t err_code; // A channel can only be uninitialized if the driver is in the idle state. if (m_cb.adc_state != NRF_SAADC_STATE_IDLE) { err_code = NRF_ERROR_BUSY; NRF_LOG_WARNING("Function: %s, error code: %s.\r\n", (uint32_t)__func__, (uint32_t)NRF_LOG_ERROR_STRING_GET(err_code)); return err_code; } if (m_cb.psel[channel].pselp) { --m_cb.active_channels; } m_cb.psel[channel].pselp = NRF_SAADC_INPUT_DISABLED; m_cb.psel[channel].pseln = NRF_SAADC_INPUT_DISABLED; nrf_saadc_channel_input_set(channel, NRF_SAADC_INPUT_DISABLED, NRF_SAADC_INPUT_DISABLED); nrf_drv_saadc_limits_set(channel, NRF_DRV_SAADC_LIMITL_DISABLED, NRF_DRV_SAADC_LIMITH_DISABLED); NRF_LOG_INFO("Channel denitialized: %d.\r\n", channel); err_code = NRF_SUCCESS; NRF_LOG_INFO("Function: %s, error code: %s.\r\n", (uint32_t)__func__, (uint32_t)NRF_LOG_ERROR_STRING_GET(err_code)); return err_code; } uint32_t nrf_drv_saadc_sample_task_get(void) { return nrf_saadc_task_address_get( m_cb.low_power_mode ? NRF_SAADC_TASK_START : NRF_SAADC_TASK_SAMPLE); } ret_code_t nrf_drv_saadc_sample_convert(uint8_t channel, nrf_saadc_value_t * p_value) { ret_code_t err_code; if (m_cb.adc_state != NRF_SAADC_STATE_IDLE) { err_code = NRF_ERROR_BUSY; NRF_LOG_WARNING("Function: %s error code: %s.\r\n", (uint32_t)__func__, (uint32_t)NRF_LOG_ERROR_STRING_GET(err_code)); return err_code; } m_cb.adc_state = NRF_SAADC_STATE_BUSY; nrf_saadc_int_disable(NRF_SAADC_INT_STARTED | NRF_SAADC_INT_END); nrf_saadc_buffer_init(p_value, 1); if (m_cb.active_channels > 1) { 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_channel_input_set(channel, m_cb.psel[channel].pselp, m_cb.psel[channel].pseln); nrf_saadc_task_trigger(NRF_SAADC_TASK_START); nrf_saadc_task_trigger(NRF_SAADC_TASK_SAMPLE); uint32_t timeout = HW_TIMEOUT; while (0 == nrf_saadc_event_check(NRF_SAADC_EVENT_END) && timeout > 0) { timeout--; } nrf_saadc_event_clear(NRF_SAADC_EVENT_STARTED); nrf_saadc_event_clear(NRF_SAADC_EVENT_END); NRF_LOG_INFO("Conversion value: %d, channel.\r\n", *p_value, channel); if (m_cb.active_channels > 1) { for (uint32_t i = 0; i < NRF_SAADC_CHANNEL_COUNT; ++i) { nrf_saadc_channel_input_set(i, m_cb.psel[i].pselp, m_cb.psel[i].pseln); } } if (m_cb.low_power_mode) { nrf_saadc_int_enable(NRF_SAADC_INT_STARTED | NRF_SAADC_INT_END); } else { nrf_saadc_int_enable(NRF_SAADC_INT_END); } m_cb.adc_state = NRF_SAADC_STATE_IDLE; err_code = NRF_SUCCESS; NRF_LOG_WARNING("Function: %s, error code: %s.\r\n", (uint32_t)__func__, (uint32_t)NRF_LOG_ERROR_STRING_GET(err_code)); return err_code; } ret_code_t nrf_drv_saadc_buffer_convert(nrf_saadc_value_t * p_buffer, uint16_t size) { ASSERT(m_cb.state != NRF_DRV_STATE_UNINITIALIZED); ASSERT((size % m_cb.active_channels) == 0); ret_code_t err_code; nrf_saadc_int_disable(NRF_SAADC_INT_END | NRF_SAADC_INT_CALIBRATEDONE); if (m_cb.adc_state == NRF_SAADC_STATE_CALIBRATION) { nrf_saadc_int_enable(NRF_SAADC_INT_END | NRF_SAADC_INT_CALIBRATEDONE); err_code = NRF_ERROR_BUSY; NRF_LOG_WARNING("Function: %s, error code: %s.\r\n", (uint32_t)__func__, (uint32_t)NRF_LOG_ERROR_STRING_GET(err_code)); return err_code; } if (m_cb.adc_state == NRF_SAADC_STATE_BUSY) { if ( m_cb.p_secondary_buffer) { nrf_saadc_int_enable(NRF_SAADC_INT_END); err_code = NRF_ERROR_BUSY; NRF_LOG_WARNING("Function: %s, error code: %s.\r\n", (uint32_t)__func__, (uint32_t)NRF_LOG_ERROR_STRING_GET(err_code)); return err_code; } else { m_cb.p_secondary_buffer = p_buffer; m_cb.secondary_buffer_size = size; if (!m_cb.low_power_mode) { while (nrf_saadc_event_check(NRF_SAADC_EVENT_STARTED) == 0); nrf_saadc_event_clear(NRF_SAADC_EVENT_STARTED); nrf_saadc_buffer_init(p_buffer, size); } nrf_saadc_int_enable(NRF_SAADC_INT_END); err_code = NRF_SUCCESS; NRF_LOG_WARNING("Function: %s, error code: %s.\r\n", (uint32_t)__func__, (uint32_t)NRF_LOG_ERROR_STRING_GET(err_code)); return err_code; } } nrf_saadc_int_enable(NRF_SAADC_INT_END); m_cb.adc_state = NRF_SAADC_STATE_BUSY; m_cb.p_buffer = p_buffer; m_cb.buffer_size = size; m_cb.p_secondary_buffer = NULL; NRF_LOG_INFO("Function: %d, buffer length: %d, active channels: %d.\r\n", (uint32_t)__func__, size, m_cb.active_channels); if (m_cb.low_power_mode) { m_cb.buffer_size_left = size; nrf_saadc_buffer_init(p_buffer, m_cb.active_channels); } else { nrf_saadc_buffer_init(p_buffer, size); nrf_saadc_event_clear(NRF_SAADC_EVENT_STARTED); nrf_saadc_task_trigger(NRF_SAADC_TASK_START); } err_code = NRF_SUCCESS; NRF_LOG_INFO("Function: %s, error code: %s.\r\n", (uint32_t)__func__, (uint32_t)NRF_LOG_ERROR_STRING_GET(err_code)); return err_code; } ret_code_t nrf_drv_saadc_sample() { ASSERT(m_cb.state != NRF_DRV_STATE_UNINITIALIZED); ret_code_t err_code = NRF_SUCCESS; if (m_cb.adc_state != NRF_SAADC_STATE_BUSY) { err_code = NRF_ERROR_INVALID_STATE; } else if (m_cb.low_power_mode) { nrf_saadc_task_trigger(NRF_SAADC_TASK_START); } else { nrf_saadc_task_trigger(NRF_SAADC_TASK_SAMPLE); } NRF_LOG_INFO("Function: %s, error code: %s.\r\n", (uint32_t)__func__, (uint32_t)NRF_LOG_ERROR_STRING_GET(err_code)); return err_code; } ret_code_t nrf_drv_saadc_calibrate_offset() { ASSERT(m_cb.state != NRF_DRV_STATE_UNINITIALIZED); ret_code_t err_code; if (m_cb.adc_state != NRF_SAADC_STATE_IDLE) { err_code = NRF_ERROR_BUSY; NRF_LOG_WARNING("Function: %s, error code: %s.\r\n", (uint32_t)__func__, (uint32_t)NRF_LOG_ERROR_STRING_GET(err_code)); return err_code; } m_cb.adc_state = NRF_SAADC_STATE_CALIBRATION; nrf_saadc_event_clear(NRF_SAADC_EVENT_CALIBRATEDONE); nrf_saadc_int_enable(NRF_SAADC_INT_CALIBRATEDONE); nrf_saadc_task_trigger(NRF_SAADC_TASK_CALIBRATEOFFSET); err_code = NRF_SUCCESS; NRF_LOG_INFO("Function: %s, error code: %s.\r\n", (uint32_t)__func__, (uint32_t)NRF_LOG_ERROR_STRING_GET(err_code)); return err_code; } bool nrf_drv_saadc_is_busy(void) { return (m_cb.adc_state != NRF_SAADC_STATE_IDLE); } void nrf_drv_saadc_abort(void) { if (nrf_drv_saadc_is_busy()) { nrf_saadc_event_clear(NRF_SAADC_EVENT_STOPPED); nrf_saadc_task_trigger(NRF_SAADC_TASK_STOP); if (m_cb.adc_state == NRF_SAADC_STATE_CALIBRATION) { m_cb.adc_state = NRF_SAADC_STATE_IDLE; } else { // Wait for ADC being stopped. uint32_t timeout = HW_TIMEOUT; while ((m_cb.adc_state != NRF_SAADC_STATE_IDLE) && (timeout > 0)) { --timeout; } ASSERT(timeout > 0); } m_cb.p_buffer = 0; m_cb.p_secondary_buffer = 0; NRF_LOG_INFO("Conversion aborted.\r\n"); } } void nrf_drv_saadc_limits_set(uint8_t channel, int16_t limit_low, int16_t limit_high) { ASSERT(m_cb.state != NRF_DRV_STATE_UNINITIALIZED); ASSERT(m_cb.event_handler); // only non blocking mode supported ASSERT(limit_low >= NRF_DRV_SAADC_LIMITL_DISABLED); ASSERT(limit_high <= NRF_DRV_SAADC_LIMITH_DISABLED); ASSERT(limit_low < limit_high); nrf_saadc_channel_limits_set(channel, limit_low, limit_high); uint32_t int_mask = nrf_saadc_limit_int_get(channel, NRF_SAADC_LIMIT_LOW); if (limit_low == NRF_DRV_SAADC_LIMITL_DISABLED) { m_cb.limits_enabled_flags &= ~(0x80000000 >> LOW_LIMIT_TO_FLAG(channel)); nrf_saadc_int_disable(int_mask); } else { m_cb.limits_enabled_flags |= (0x80000000 >> LOW_LIMIT_TO_FLAG(channel)); nrf_saadc_int_enable(int_mask); } int_mask = nrf_saadc_limit_int_get(channel, NRF_SAADC_LIMIT_HIGH); if (limit_high == NRF_DRV_SAADC_LIMITH_DISABLED) { m_cb.limits_enabled_flags &= ~(0x80000000 >> HIGH_LIMIT_TO_FLAG(channel)); nrf_saadc_int_disable(int_mask); } else { m_cb.limits_enabled_flags |= (0x80000000 >> HIGH_LIMIT_TO_FLAG(channel)); nrf_saadc_int_enable(int_mask); } } #endif //NRF_MODULE_ENABLED(SAADC)