| /** |
| * Copyright (c) 2015 - 2018, 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 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 the copyright holder nor the names of its |
| * contributors may be used to endorse or promote products derived from this |
| * software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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 <nrfx.h> |
| |
| #if NRFX_CHECK(NRFX_ADC_ENABLED) |
| |
| #include <nrfx_adc.h> |
| |
| #define NRFX_LOG_MODULE ADC |
| #include <nrfx_log.h> |
| |
| #define EVT_TO_STR(event) (event == NRF_ADC_EVENT_END ? "NRF_ADC_EVENT_END" : "UNKNOWN EVENT") |
| |
| typedef struct |
| { |
| nrfx_adc_event_handler_t event_handler; |
| nrfx_adc_channel_t * p_head; |
| nrfx_adc_channel_t * p_current_conv; |
| nrf_adc_value_t * p_buffer; |
| uint16_t size; |
| uint16_t idx; |
| nrfx_drv_state_t state; |
| } adc_cb_t; |
| |
| static adc_cb_t m_cb; |
| |
| nrfx_err_t nrfx_adc_init(nrfx_adc_config_t const * p_config, |
| nrfx_adc_event_handler_t event_handler) |
| { |
| NRFX_ASSERT(p_config); |
| nrfx_err_t err_code; |
| |
| if (m_cb.state != NRFX_DRV_STATE_UNINITIALIZED) |
| { |
| err_code = NRFX_ERROR_INVALID_STATE; |
| NRFX_LOG_WARNING("Function: %s, error code: %s.", |
| __func__, |
| NRFX_LOG_ERROR_STRING_GET(err_code)); |
| return err_code; |
| } |
| |
| nrf_adc_event_clear(NRF_ADC_EVENT_END); |
| if (event_handler) |
| { |
| NRFX_IRQ_PRIORITY_SET(ADC_IRQn, p_config->interrupt_priority); |
| NRFX_IRQ_ENABLE(ADC_IRQn); |
| } |
| m_cb.event_handler = event_handler; |
| m_cb.state = NRFX_DRV_STATE_INITIALIZED; |
| |
| err_code = NRFX_SUCCESS; |
| NRFX_LOG_INFO("Function: %s, error code: %s.", __func__, NRFX_LOG_ERROR_STRING_GET(err_code)); |
| return err_code; |
| } |
| |
| void nrfx_adc_uninit(void) |
| { |
| m_cb.p_head = NULL; |
| NRFX_IRQ_DISABLE(ADC_IRQn); |
| nrf_adc_int_disable(NRF_ADC_INT_END_MASK); |
| nrf_adc_task_trigger(NRF_ADC_TASK_STOP); |
| |
| m_cb.state = NRFX_DRV_STATE_UNINITIALIZED; |
| } |
| |
| void nrfx_adc_channel_enable(nrfx_adc_channel_t * const p_channel) |
| { |
| NRFX_ASSERT(!nrfx_adc_is_busy()); |
| |
| p_channel->p_next = NULL; |
| if (m_cb.p_head == NULL) |
| { |
| m_cb.p_head = p_channel; |
| } |
| else |
| { |
| nrfx_adc_channel_t * p_curr_channel = m_cb.p_head; |
| while (p_curr_channel->p_next != NULL) |
| { |
| NRFX_ASSERT(p_channel != p_curr_channel); |
| p_curr_channel = p_curr_channel->p_next; |
| } |
| p_curr_channel->p_next = p_channel; |
| } |
| |
| NRFX_LOG_INFO("Enabled."); |
| } |
| |
| void nrfx_adc_channel_disable(nrfx_adc_channel_t * const p_channel) |
| { |
| NRFX_ASSERT(m_cb.p_head); |
| NRFX_ASSERT(!nrfx_adc_is_busy()); |
| |
| nrfx_adc_channel_t * p_curr_channel = m_cb.p_head; |
| nrfx_adc_channel_t * p_prev_channel = NULL; |
| while (p_curr_channel != p_channel) |
| { |
| p_prev_channel = p_curr_channel; |
| p_curr_channel = p_curr_channel->p_next; |
| NRFX_ASSERT(p_curr_channel != NULL); |
| } |
| if (p_prev_channel) |
| { |
| p_prev_channel->p_next = p_curr_channel->p_next; |
| } |
| else |
| { |
| m_cb.p_head = p_curr_channel->p_next; |
| } |
| |
| NRFX_LOG_INFO("Disabled."); |
| } |
| |
| void nrfx_adc_sample(void) |
| { |
| NRFX_ASSERT(m_cb.state != NRFX_DRV_STATE_UNINITIALIZED); |
| NRFX_ASSERT(!nrf_adc_busy_check()); |
| nrf_adc_task_trigger(NRF_ADC_TASK_START); |
| } |
| |
| nrfx_err_t nrfx_adc_sample_convert(nrfx_adc_channel_t const * const p_channel, |
| nrf_adc_value_t * p_value) |
| { |
| nrfx_err_t err_code; |
| |
| NRFX_ASSERT(m_cb.state != NRFX_DRV_STATE_UNINITIALIZED); |
| if (m_cb.state == NRFX_DRV_STATE_POWERED_ON) |
| { |
| err_code = NRFX_ERROR_BUSY; |
| NRFX_LOG_WARNING("Function: %s, error code: %s.", |
| __func__, |
| NRFX_LOG_ERROR_STRING_GET(err_code)); |
| return err_code; |
| } |
| else |
| { |
| m_cb.state = NRFX_DRV_STATE_POWERED_ON; |
| |
| nrf_adc_init(&p_channel->config); |
| nrf_adc_enable(); |
| nrf_adc_int_disable(NRF_ADC_INT_END_MASK); |
| nrf_adc_task_trigger(NRF_ADC_TASK_START); |
| if (p_value) |
| { |
| while (!nrf_adc_event_check(NRF_ADC_EVENT_END)) {} |
| nrf_adc_event_clear(NRF_ADC_EVENT_END); |
| *p_value = (nrf_adc_value_t)nrf_adc_result_get(); |
| nrf_adc_disable(); |
| |
| m_cb.state = NRFX_DRV_STATE_INITIALIZED; |
| } |
| else |
| { |
| NRFX_ASSERT(m_cb.event_handler); |
| m_cb.p_buffer = NULL; |
| nrf_adc_int_enable(NRF_ADC_INT_END_MASK); |
| } |
| err_code = NRFX_SUCCESS; |
| NRFX_LOG_INFO("Function: %s, error code: %s.", |
| __func__, |
| NRFX_LOG_ERROR_STRING_GET(err_code)); |
| return err_code; |
| } |
| } |
| |
| static bool adc_sample_process() |
| { |
| nrf_adc_event_clear(NRF_ADC_EVENT_END); |
| nrf_adc_disable(); |
| m_cb.p_buffer[m_cb.idx] = (nrf_adc_value_t)nrf_adc_result_get(); |
| m_cb.idx++; |
| if (m_cb.idx < m_cb.size) |
| { |
| bool task_trigger = false; |
| if (m_cb.p_current_conv->p_next == NULL) |
| { |
| m_cb.p_current_conv = m_cb.p_head; |
| } |
| else |
| { |
| m_cb.p_current_conv = m_cb.p_current_conv->p_next; |
| task_trigger = true; |
| } |
| nrf_adc_init(&m_cb.p_current_conv->config); |
| nrf_adc_enable(); |
| if (task_trigger) |
| { |
| nrf_adc_task_trigger(NRF_ADC_TASK_START); |
| } |
| return false; |
| } |
| else |
| { |
| return true; |
| } |
| } |
| |
| nrfx_err_t nrfx_adc_buffer_convert(nrf_adc_value_t * buffer, uint16_t size) |
| { |
| NRFX_ASSERT(m_cb.state != NRFX_DRV_STATE_UNINITIALIZED); |
| |
| nrfx_err_t err_code; |
| |
| NRFX_LOG_INFO("Number of samples requested to convert: %d.", size); |
| |
| if (m_cb.state == NRFX_DRV_STATE_POWERED_ON) |
| { |
| err_code = NRFX_ERROR_BUSY; |
| NRFX_LOG_WARNING("Function: %s, error code: %s.", |
| __func__, |
| NRFX_LOG_ERROR_STRING_GET(err_code)); |
| return err_code; |
| } |
| else |
| { |
| m_cb.state = NRFX_DRV_STATE_POWERED_ON; |
| m_cb.p_current_conv = m_cb.p_head; |
| m_cb.size = size; |
| m_cb.idx = 0; |
| m_cb.p_buffer = buffer; |
| nrf_adc_init(&m_cb.p_current_conv->config); |
| nrf_adc_event_clear(NRF_ADC_EVENT_END); |
| nrf_adc_enable(); |
| if (m_cb.event_handler) |
| { |
| nrf_adc_int_enable(NRF_ADC_INT_END_MASK); |
| } |
| else |
| { |
| while (1) |
| { |
| while (!nrf_adc_event_check(NRF_ADC_EVENT_END)){} |
| |
| if (adc_sample_process()) |
| { |
| m_cb.state = NRFX_DRV_STATE_INITIALIZED; |
| break; |
| } |
| } |
| } |
| err_code = NRFX_SUCCESS; |
| NRFX_LOG_INFO("Function: %s, error code: %s.", |
| __func__, |
| NRFX_LOG_ERROR_STRING_GET(err_code)); |
| return err_code; |
| } |
| } |
| |
| bool nrfx_adc_is_busy(void) |
| { |
| NRFX_ASSERT(m_cb.state != NRFX_DRV_STATE_UNINITIALIZED); |
| return (m_cb.state == NRFX_DRV_STATE_POWERED_ON) ? true : false; |
| } |
| |
| void nrfx_adc_irq_handler(void) |
| { |
| if (m_cb.p_buffer == NULL) |
| { |
| nrf_adc_event_clear(NRF_ADC_EVENT_END); |
| NRFX_LOG_DEBUG("Event: %s.",NRFX_LOG_ERROR_STRING_GET(NRF_ADC_EVENT_END)); |
| nrf_adc_int_disable(NRF_ADC_INT_END_MASK); |
| nrf_adc_disable(); |
| nrfx_adc_evt_t evt; |
| evt.type = NRFX_ADC_EVT_SAMPLE; |
| evt.data.sample.sample = (nrf_adc_value_t)nrf_adc_result_get(); |
| NRFX_LOG_DEBUG("ADC data:"); |
| NRFX_LOG_HEXDUMP_DEBUG((uint8_t *)(&evt.data.sample.sample), sizeof(nrf_adc_value_t)); |
| m_cb.state = NRFX_DRV_STATE_INITIALIZED; |
| m_cb.event_handler(&evt); |
| } |
| else if (adc_sample_process()) |
| { |
| NRFX_LOG_DEBUG("Event: %s.", NRFX_LOG_ERROR_STRING_GET(NRF_ADC_EVENT_END)); |
| nrf_adc_int_disable(NRF_ADC_INT_END_MASK); |
| nrfx_adc_evt_t evt; |
| evt.type = NRFX_ADC_EVT_DONE; |
| evt.data.done.p_buffer = m_cb.p_buffer; |
| evt.data.done.size = m_cb.size; |
| m_cb.state = NRFX_DRV_STATE_INITIALIZED; |
| NRFX_LOG_DEBUG("ADC data:"); |
| NRFX_LOG_HEXDUMP_DEBUG((uint8_t *)m_cb.p_buffer, m_cb.size * sizeof(nrf_adc_value_t)); |
| m_cb.event_handler(&evt); |
| } |
| } |
| |
| #endif // NRFX_CHECK(NRFX_ADC_ENABLED) |
