diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/modules/nrfx/drivers/src/nrfx_adc.c')
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/modules/nrfx/drivers/src/nrfx_adc.c | 324 |
1 files changed, 324 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/modules/nrfx/drivers/src/nrfx_adc.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/modules/nrfx/drivers/src/nrfx_adc.c new file mode 100644 index 0000000..cbe51fa --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/modules/nrfx/drivers/src/nrfx_adc.c @@ -0,0 +1,324 @@ +/** + * 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, 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 <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) |