Diff: TARGET_SDT51822B/TOOLCHAIN_ARM_STD/nrf_adc.h

Revision:

171:3a7713b1edbc

Parent:

169:a7c7b631e539

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TARGET_SDT51822B/TOOLCHAIN_ARM_STD/nrf_adc.h	Thu Nov 08 11:45:42 2018 +0000
@@ -0,0 +1,443 @@
+/* 
+ * Copyright (c) 2014 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 or object form under this license must not be reverse 
+ *      engineered, decompiled, modified and/or disassembled. 
+ * 
+ * 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.
+ * 
+ */
+
+
+#ifndef NRF_ADC_H_
+#define NRF_ADC_H_
+
+/**
+ * @defgroup nrf_adc_hal ADC HAL
+ * @{
+ * @ingroup nrf_adc
+ * @brief @tagAPI51 Hardware access layer for managing the analog-to-digital converter (ADC).
+ */
+
+#include <stdbool.h>
+#include <stddef.h>
+
+#include "nrf.h"
+
+#ifndef NRF52
+/**
+ * @enum  nrf_adc_config_resolution_t
+ * @brief Resolution of the analog-to-digital converter.
+ */
+
+/**
+ * @brief ADC interrupts.
+ */
+typedef enum
+{
+    NRF_ADC_INT_END_MASK  = ADC_INTENSET_END_Msk,   /**< ADC interrupt on END event. */
+} nrf_adc_int_mask_t;
+
+typedef enum
+{
+    NRF_ADC_CONFIG_RES_8BIT  = ADC_CONFIG_RES_8bit,  /**< 8 bit resolution. */
+    NRF_ADC_CONFIG_RES_9BIT  = ADC_CONFIG_RES_9bit,  /**< 9 bit resolution. */
+    NRF_ADC_CONFIG_RES_10BIT = ADC_CONFIG_RES_10bit, /**< 10 bit resolution. */
+} nrf_adc_config_resolution_t;
+
+
+/**
+ * @enum nrf_adc_config_scaling_t
+ * @brief Scaling factor of the analog-to-digital conversion.
+ */
+typedef enum
+{
+    NRF_ADC_CONFIG_SCALING_INPUT_FULL_SCALE  = ADC_CONFIG_INPSEL_AnalogInputNoPrescaling,        /**< Full scale input. */
+    NRF_ADC_CONFIG_SCALING_INPUT_TWO_THIRDS  = ADC_CONFIG_INPSEL_AnalogInputTwoThirdsPrescaling, /**< 2/3 scale input. */
+    NRF_ADC_CONFIG_SCALING_INPUT_ONE_THIRD   = ADC_CONFIG_INPSEL_AnalogInputOneThirdPrescaling,  /**< 1/3 scale input. */
+    NRF_ADC_CONFIG_SCALING_SUPPLY_TWO_THIRDS = ADC_CONFIG_INPSEL_SupplyTwoThirdsPrescaling,      /**< 2/3 of supply. */
+    NRF_ADC_CONFIG_SCALING_SUPPLY_ONE_THIRD  = ADC_CONFIG_INPSEL_SupplyOneThirdPrescaling        /**< 1/3 of supply. */
+} nrf_adc_config_scaling_t;
+
+/**
+ * @enum nrf_adc_config_reference_t
+ * @brief Reference selection of the analog-to-digital converter.
+ */
+typedef enum
+{
+    NRF_ADC_CONFIG_REF_VBG              = ADC_CONFIG_REFSEL_VBG,                      /**< 1.2 V reference. */
+    NRF_ADC_CONFIG_REF_SUPPLY_ONE_HALF  = ADC_CONFIG_REFSEL_SupplyOneHalfPrescaling,  /**< 1/2 of power supply. */
+    NRF_ADC_CONFIG_REF_SUPPLY_ONE_THIRD = ADC_CONFIG_REFSEL_SupplyOneThirdPrescaling, /**< 1/3 of power supply. */
+    NRF_ADC_CONFIG_REF_EXT_REF0         = ADC_CONFIG_REFSEL_External |
+                                          ADC_CONFIG_EXTREFSEL_AnalogReference0 <<
+    ADC_CONFIG_EXTREFSEL_Pos, /**< External reference 0. */
+        NRF_ADC_CONFIG_REF_EXT_REF1 = ADC_CONFIG_REFSEL_External |
+                                  ADC_CONFIG_EXTREFSEL_AnalogReference1 << ADC_CONFIG_EXTREFSEL_Pos, /**< External reference 0. */
+} nrf_adc_config_reference_t;
+
+/**
+ * @enum nrf_adc_config_input_t
+ * @brief Input selection of the analog-to-digital converter.
+ */
+typedef enum
+{
+    NRF_ADC_CONFIG_INPUT_DISABLED = ADC_CONFIG_PSEL_Disabled,     /**< No input selected. */
+    NRF_ADC_CONFIG_INPUT_0        = ADC_CONFIG_PSEL_AnalogInput0, /**< Input 0. */
+    NRF_ADC_CONFIG_INPUT_1        = ADC_CONFIG_PSEL_AnalogInput1, /**< Input 1. */
+    NRF_ADC_CONFIG_INPUT_2        = ADC_CONFIG_PSEL_AnalogInput2, /**< Input 2. */
+    NRF_ADC_CONFIG_INPUT_3        = ADC_CONFIG_PSEL_AnalogInput3, /**< Input 3. */
+    NRF_ADC_CONFIG_INPUT_4        = ADC_CONFIG_PSEL_AnalogInput4, /**< Input 4. */
+    NRF_ADC_CONFIG_INPUT_5        = ADC_CONFIG_PSEL_AnalogInput5, /**< Input 5. */
+    NRF_ADC_CONFIG_INPUT_6        = ADC_CONFIG_PSEL_AnalogInput6, /**< Input 6. */
+    NRF_ADC_CONFIG_INPUT_7        = ADC_CONFIG_PSEL_AnalogInput7, /**< Input 7. */
+} nrf_adc_config_input_t;
+
+/**
+ * @enum nrf_adc_task_t
+ * @brief Analog-to-digital converter tasks.
+ */
+typedef enum
+{
+    /*lint -save -e30*/
+    NRF_ADC_TASK_START = offsetof(NRF_ADC_Type, TASKS_START), /**< ADC start sampling task. */
+    NRF_ADC_TASK_STOP  = offsetof(NRF_ADC_Type, TASKS_STOP)   /**< ADC stop sampling task. */
+    /*lint -restore*/
+} nrf_adc_task_t;
+
+/**
+ * @enum nrf_adc_event_t
+ * @brief Analog-to-digital converter events.
+ */
+typedef enum /*lint -save -e30 -esym(628,__INTADDR__) */
+{
+    /*lint -save -e30*/
+    NRF_ADC_EVENT_END = offsetof(NRF_ADC_Type, EVENTS_END) /**< End of conversion event. */
+    /*lint -restore*/
+} nrf_adc_event_t;
+
+/**@brief Analog-to-digital converter configuration. */
+typedef struct
+{
+    nrf_adc_config_resolution_t resolution; /**< ADC resolution. */
+    nrf_adc_config_scaling_t    scaling;    /**< ADC scaling factor. */
+    nrf_adc_config_reference_t  reference;  /**< ADC reference. */
+} nrf_adc_config_t;
+
+/** Default ADC configuration. */
+#define NRF_ADC_CONFIG_DEFAULT { NRF_ADC_CONFIG_RES_10BIT,               \
+                                 NRF_ADC_CONFIG_SCALING_INPUT_ONE_THIRD, \
+                                 NRF_ADC_CONFIG_REF_VBG }
+
+/**
+ * @brief Function for configuring ADC.
+ *
+ * This function powers on the analog-to-digital converter and configures it. 
+ * After the configuration, the ADC is in DISABLE state and must be
+ * enabled before using it.
+ *
+ * @param[in] config Configuration parameters.
+ */
+void nrf_adc_configure(nrf_adc_config_t * config);
+
+/**
+ * @brief Blocking function for executing a single ADC conversion.
+ *
+ * This function selects the desired input, starts a single conversion,
+ * waits for it to finish, and returns the result.
+ * After the input is selected, the analog-to-digital converter
+ * is left in STOP state.
+ * The function does not check if the ADC is initialized and powered.
+ *
+ * @param[in] input Input to be selected.
+ *
+ * @return Conversion result.
+ */
+int32_t nrf_adc_convert_single(nrf_adc_config_input_t input);
+
+/**
+ * @brief Function for selecting ADC input.
+ *
+ * This function selects the active input of ADC. Ensure that
+ * the ADC is powered on and in IDLE state before calling this function.
+ *
+ * @param[in] input Input to be selected.
+ */
+__STATIC_INLINE void nrf_adc_input_select(nrf_adc_config_input_t input)
+{
+    NRF_ADC->CONFIG =
+        ((uint32_t)input << ADC_CONFIG_PSEL_Pos) | (NRF_ADC->CONFIG & ~ADC_CONFIG_PSEL_Msk);
+
+    if (input != NRF_ADC_CONFIG_INPUT_DISABLED)
+    {
+        NRF_ADC->ENABLE = ADC_ENABLE_ENABLE_Enabled << ADC_ENABLE_ENABLE_Pos;
+    }
+    else
+    {
+        NRF_ADC->ENABLE = ADC_ENABLE_ENABLE_Disabled << ADC_ENABLE_ENABLE_Pos;
+    }
+}
+
+
+/**
+ * @brief Function for retrieving the ADC conversion result.
+ *
+ * This function retrieves and returns the last analog-to-digital conversion result.
+ *
+ * @return Last conversion result.
+ */
+__STATIC_INLINE int32_t nrf_adc_result_get(void)
+{
+    return (int32_t)NRF_ADC->RESULT;
+}
+
+
+/**
+ * @brief Function for checking whether the ADC is busy.
+ *
+ * This function checks whether the analog-to-digital converter is busy with a conversion.
+ *
+ * @retval true If the ADC is busy.
+ * @retval false If the ADC is not busy.
+ */
+__STATIC_INLINE bool nrf_adc_is_busy(void)
+{
+    return ( (NRF_ADC->BUSY & ADC_BUSY_BUSY_Msk) == ADC_BUSY_BUSY_Msk);
+}
+
+/**
+ * @brief Function for getting the ADC's enabled interrupts.
+ *
+ * @param[in] mask Mask of interrupts to check.
+ *
+ * @return State of the interrupts selected by the mask.
+ *
+ * @sa nrf_adc_int_enable()
+ * @sa nrf_adc_int_disable()
+ */
+__STATIC_INLINE uint32_t nrf_adc_int_get(uint32_t mask)
+{
+    return (NRF_ADC->INTENSET & mask); // when read this register will return the value of INTEN.
+}
+
+
+/**
+ * @brief Function for starting conversion.
+ *
+ * @sa nrf_adc_stop()
+ *
+ */
+__STATIC_INLINE void nrf_adc_start(void)
+{
+    NRF_ADC->TASKS_START = 1;
+}
+
+
+/**
+ * @brief Function for stopping conversion. 
+ *
+ * If the analog-to-digital converter is in inactive state, power consumption is reduced.
+ *
+ * @sa nrf_adc_start()
+ *
+ */
+__STATIC_INLINE void nrf_adc_stop(void)
+{
+    NRF_ADC->TASKS_STOP = 1;
+}
+
+
+/**
+ * @brief Function for checking if the requested ADC conversion has ended.
+ *
+ * @retval true If the task has finished.
+ * @retval false If the task is still running.
+ */
+__STATIC_INLINE bool nrf_adc_conversion_finished(void)
+{
+    return ((bool)NRF_ADC->EVENTS_END);
+}
+
+/**
+ * @brief Function for clearing the conversion END event.
+ */
+__STATIC_INLINE void nrf_adc_conversion_event_clean(void)
+{
+    NRF_ADC->EVENTS_END = 0;
+}
+
+/**
+ * @brief Function for getting the address of an ADC task register.
+ *
+ * @param[in] adc_task ADC task.
+ *
+ * @return Address of the specified ADC task.
+ */
+__STATIC_INLINE uint32_t nrf_adc_task_address_get(nrf_adc_task_t adc_task);
+
+/**
+ * @brief Function for getting the address of a specific ADC event register.
+ *
+ * @param[in] adc_event ADC event.
+ *
+ * @return Address of the specified ADC event.
+ */
+__STATIC_INLINE uint32_t nrf_adc_event_address_get(nrf_adc_event_t adc_event);
+
+/**
+ * @brief Function for setting the CONFIG register in ADC.
+ *
+ * @param[in] configuration Value to be written to the CONFIG register.
+ */
+__STATIC_INLINE void nrf_adc_config_set(uint32_t configuration);
+
+/**
+ * @brief Function for clearing an ADC event.
+ *
+ * @param[in] event Event to clear.
+ */
+__STATIC_INLINE void nrf_adc_event_clear(nrf_adc_event_t event);
+
+/**
+ * @brief Function for checking state of an ADC event.
+ *
+ * @param[in] event Event to check.
+ *
+ * @retval true  If the event is set.
+ * @retval false If the event is not set.
+ */
+__STATIC_INLINE bool nrf_adc_event_check(nrf_adc_event_t event);
+
+/**
+ * @brief Function for enabling specified interrupts.
+ *
+ * @param[in] int_mask  Interrupts to enable.
+ */
+__STATIC_INLINE void nrf_adc_int_enable(uint32_t int_mask);
+
+/**
+ * @brief Function for disabling specified interrupts.
+ *
+ * @param[in] int_mask  Interrupts to disable.
+ */
+__STATIC_INLINE void nrf_adc_int_disable(uint32_t int_mask);
+
+/**
+ * @brief Function for retrieving the state of a given interrupt.
+ *
+ * @param[in] int_mask Interrupt to check.
+ *
+ * @retval true  If the interrupt is enabled.
+ * @retval false If the interrupt is not enabled.
+ */
+__STATIC_INLINE bool nrf_adc_int_enable_check(nrf_adc_int_mask_t int_mask);
+
+/**
+ * @brief Function for activating a specific ADC task.
+ *
+ * @param[in] task Task to activate.
+ */
+__STATIC_INLINE void nrf_adc_task_trigger(nrf_adc_task_t task);
+
+/**
+ * @brief Function for enabling ADC.
+ *
+ */
+__STATIC_INLINE void nrf_adc_enable(void);
+
+/**
+ * @brief Function for disabling ADC.
+ *
+ */
+__STATIC_INLINE void nrf_adc_disable(void);
+
+#ifndef SUPPRESS_INLINE_IMPLEMENTATION
+
+__STATIC_INLINE uint32_t nrf_adc_task_address_get(nrf_adc_task_t adc_task)
+{
+    return (uint32_t)((uint8_t *)NRF_ADC + adc_task);
+}
+
+__STATIC_INLINE uint32_t nrf_adc_event_address_get(nrf_adc_event_t adc_event)
+{
+    return (uint32_t)((uint8_t *)NRF_ADC + adc_event);
+}
+
+__STATIC_INLINE void nrf_adc_config_set(uint32_t configuration)
+{
+    NRF_ADC->CONFIG = configuration;
+}
+
+__STATIC_INLINE void nrf_adc_event_clear(nrf_adc_event_t event)
+{
+    *((volatile uint32_t *)((uint8_t *)NRF_ADC + (uint32_t)event)) = 0x0UL;
+}
+
+__STATIC_INLINE bool nrf_adc_event_check(nrf_adc_event_t event)
+{
+    return (bool)*(volatile uint32_t *)((uint8_t *)NRF_ADC + (uint32_t)event);
+}
+
+__STATIC_INLINE void nrf_adc_int_enable(uint32_t int_mask)
+{
+    NRF_ADC->INTENSET = int_mask;
+}
+
+__STATIC_INLINE void nrf_adc_int_disable(uint32_t int_mask)
+{
+    NRF_ADC->INTENCLR = int_mask;
+}
+
+__STATIC_INLINE bool nrf_adc_int_enable_check(nrf_adc_int_mask_t int_mask)
+{
+    return (bool)(NRF_ADC->INTENSET & int_mask);
+}
+
+__STATIC_INLINE void nrf_adc_task_trigger(nrf_adc_task_t task)
+{
+    *((volatile uint32_t *)((uint8_t *)NRF_ADC + (uint32_t)task)) = 0x1UL;
+}
+
+__STATIC_INLINE void nrf_adc_enable(void)
+{
+    NRF_ADC->ENABLE = 1;
+}
+
+__STATIC_INLINE void nrf_adc_disable(void)
+{
+    NRF_ADC->ENABLE = 0;
+}
+#endif
+#endif /* NRF52 */
+/**
+ *@}
+ **/
+
+#endif /* NRF_ADC_H_ */