Junichi Katsu / nRF51822

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Fork of nRF51822 by Nordic Semiconductor

nordic/nrf-sdk/app_common/app_gpiote.h@0:eff01767de02, 2014-03-26 (annotated)

Committer:
bogdanm
Date:
Wed Mar 26 14:38:17 2014 +0000
Revision:
0:eff01767de02
Child:
37:c29c330d942c
Initial import of the nRF51822 code

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:eff01767de02 1 /* Copyright (c) 2012 Nordic Semiconductor. All Rights Reserved.
bogdanm 0:eff01767de02 2 *
bogdanm 0:eff01767de02 3 * The information contained herein is property of Nordic Semiconductor ASA.
bogdanm 0:eff01767de02 4 * Terms and conditions of usage are described in detail in NORDIC
bogdanm 0:eff01767de02 5 * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
bogdanm 0:eff01767de02 6 *
bogdanm 0:eff01767de02 7 * Licensees are granted free, non-transferable use of the information. NO
bogdanm 0:eff01767de02 8 * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
bogdanm 0:eff01767de02 9 * the file.
bogdanm 0:eff01767de02 10 *
bogdanm 0:eff01767de02 11 */
bogdanm 0:eff01767de02 12
bogdanm 0:eff01767de02 13 /** @file
bogdanm 0:eff01767de02 14 *
bogdanm 0:eff01767de02 15 * @defgroup app_gpiote GPIOTE Handler
bogdanm 0:eff01767de02 16 * @{
bogdanm 0:eff01767de02 17 * @ingroup app_common
bogdanm 0:eff01767de02 18 *
bogdanm 0:eff01767de02 19 * @brief GPIOTE handler module.
bogdanm 0:eff01767de02 20 *
bogdanm 0:eff01767de02 21 * @details The GPIOTE handler allows several modules ("users") to share the GPIOTE interrupt,
bogdanm 0:eff01767de02 22 * each user defining a set of pins able to generate events to the user.
bogdanm 0:eff01767de02 23 * When a GPIOTE interrupt occurs, the GPIOTE interrupt handler will call the event handler
bogdanm 0:eff01767de02 24 * of each user for which at least one of the pins generated an event.
bogdanm 0:eff01767de02 25 *
bogdanm 0:eff01767de02 26 * The GPIOTE users are responsible for configuring all their corresponding pins, except
bogdanm 0:eff01767de02 27 * the SENSE field, which should be initialized to GPIO_PIN_CNF_SENSE_Disabled.
bogdanm 0:eff01767de02 28 * The SENSE field will be updated by the GPIOTE module when it is enabled or disabled,
bogdanm 0:eff01767de02 29 * and also while it is enabled.
bogdanm 0:eff01767de02 30 *
bogdanm 0:eff01767de02 31 * The module specifies on which pins events should be generated if the pin(s) goes
bogdanm 0:eff01767de02 32 * from low->high or high->low or both directions.
bogdanm 0:eff01767de02 33 *
bogdanm 0:eff01767de02 34 * @note Even if the application is using the @ref app_scheduler, the GPIOTE event handlers will
bogdanm 0:eff01767de02 35 * be called directly from the GPIOTE interrupt handler.
bogdanm 0:eff01767de02 36 */
bogdanm 0:eff01767de02 37
bogdanm 0:eff01767de02 38 #ifndef APP_GPIOTE_H__
bogdanm 0:eff01767de02 39 #define APP_GPIOTE_H__
bogdanm 0:eff01767de02 40
bogdanm 0:eff01767de02 41 #include <stdint.h>
bogdanm 0:eff01767de02 42 #include <stdbool.h>
bogdanm 0:eff01767de02 43 #include "nordic_global.h"
bogdanm 0:eff01767de02 44 #include "nrf.h"
bogdanm 0:eff01767de02 45 #include "app_error.h"
bogdanm 0:eff01767de02 46 #include "app_util.h"
bogdanm 0:eff01767de02 47
bogdanm 0:eff01767de02 48 #define GPIOTE_USER_NODE_SIZE 20 /**< Size of app_gpiote.gpiote_user_t (only for use inside APP_GPIOTE_BUF_SIZE()). */
bogdanm 0:eff01767de02 49 #define NO_OF_PINS 32 /**< Number of GPIO pins on the nRF51 chip. */
bogdanm 0:eff01767de02 50
bogdanm 0:eff01767de02 51 /**@brief Compute number of bytes required to hold the GPIOTE data structures.
bogdanm 0:eff01767de02 52 *
bogdanm 0:eff01767de02 53 * @param[in] MAX_USERS Maximum number of GPIOTE users.
bogdanm 0:eff01767de02 54 *
bogdanm 0:eff01767de02 55 * @return Required buffer size (in bytes).
bogdanm 0:eff01767de02 56 */
bogdanm 0:eff01767de02 57 #define APP_GPIOTE_BUF_SIZE(MAX_USERS) ((MAX_USERS) * GPIOTE_USER_NODE_SIZE)
bogdanm 0:eff01767de02 58
bogdanm 0:eff01767de02 59 typedef uint8_t app_gpiote_user_id_t;
bogdanm 0:eff01767de02 60
bogdanm 0:eff01767de02 61 /**@brief GPIOTE event handler type. */
bogdanm 0:eff01767de02 62 typedef void (*app_gpiote_event_handler_t)(uint32_t event_pins_low_to_high,
bogdanm 0:eff01767de02 63 uint32_t event_pins_high_to_low);
bogdanm 0:eff01767de02 64
bogdanm 0:eff01767de02 65 /**@brief Macro for initializing the GPIOTE module.
bogdanm 0:eff01767de02 66 *
bogdanm 0:eff01767de02 67 * @details It will handle dimensioning and allocation of the memory buffer required by the module,
bogdanm 0:eff01767de02 68 * making sure that the buffer is correctly aligned.
bogdanm 0:eff01767de02 69 *
bogdanm 0:eff01767de02 70 * @param[in] MAX_USERS Maximum number of GPIOTE users.
bogdanm 0:eff01767de02 71 *
bogdanm 0:eff01767de02 72 * @note Since this macro allocates a buffer, it must only be called once (it is OK to call it
bogdanm 0:eff01767de02 73 * several times as long as it is from the same location, e.g. to do a reinitialization).
bogdanm 0:eff01767de02 74 */
bogdanm 0:eff01767de02 75 /*lint -emacro(506, APP_GPIOTE_INIT) */ /* Suppress "Constant value Boolean */
bogdanm 0:eff01767de02 76 #define APP_GPIOTE_INIT(MAX_USERS) \
bogdanm 0:eff01767de02 77 do \
bogdanm 0:eff01767de02 78 { \
bogdanm 0:eff01767de02 79 static uint32_t app_gpiote_buf[CEIL_DIV(APP_GPIOTE_BUF_SIZE(MAX_USERS), sizeof(uint32_t))];\
bogdanm 0:eff01767de02 80 uint32_t ERR_CODE = app_gpiote_init((MAX_USERS), app_gpiote_buf); \
bogdanm 0:eff01767de02 81 APP_ERROR_CHECK(ERR_CODE); \
bogdanm 0:eff01767de02 82 } while (0)
bogdanm 0:eff01767de02 83
bogdanm 0:eff01767de02 84 /**@brief Function for initializing the GPIOTE module.
bogdanm 0:eff01767de02 85 *
bogdanm 0:eff01767de02 86 * @note Normally initialization should be done using the APP_GPIOTE_INIT() macro, as that will
bogdanm 0:eff01767de02 87 * allocate the buffer needed by the GPIOTE module (including aligning the buffer correctly).
bogdanm 0:eff01767de02 88 *
bogdanm 0:eff01767de02 89 * @param[in] max_users Maximum number of GPIOTE users.
bogdanm 0:eff01767de02 90 * @param[in] p_buffer Pointer to memory buffer for internal use in the app_gpiote
bogdanm 0:eff01767de02 91 * module. The size of the buffer can be computed using the
bogdanm 0:eff01767de02 92 * APP_GPIOTE_BUF_SIZE() macro. The buffer must be aligned to
bogdanm 0:eff01767de02 93 * a 4 byte boundary.
bogdanm 0:eff01767de02 94 *
bogdanm 0:eff01767de02 95 * @retval NRF_SUCCESS Successful initialization.
bogdanm 0:eff01767de02 96 * @retval NRF_ERROR_INVALID_PARAM Invalid parameter (buffer not aligned to a 4 byte
bogdanm 0:eff01767de02 97 * boundary).
bogdanm 0:eff01767de02 98 */
bogdanm 0:eff01767de02 99 uint32_t app_gpiote_init(uint8_t max_users, void * p_buffer);
bogdanm 0:eff01767de02 100
bogdanm 0:eff01767de02 101 /**@brief Function for registering a GPIOTE user.
bogdanm 0:eff01767de02 102 *
bogdanm 0:eff01767de02 103 * @param[out] p_user_id Id for the new GPIOTE user.
bogdanm 0:eff01767de02 104 * @param[in] pins_low_to_high_mask Mask defining which pins will generate events to this user
bogdanm 0:eff01767de02 105 * when state is changed from low->high.
bogdanm 0:eff01767de02 106 * @param[in] pins_high_to_low_mask Mask defining which pins will generate events to this user
bogdanm 0:eff01767de02 107 * when state is changed from high->low.
bogdanm 0:eff01767de02 108 * @param[in] event_handler Pointer to function to be executed when an event occurs.
bogdanm 0:eff01767de02 109 *
bogdanm 0:eff01767de02 110 * @retval NRF_SUCCESS Successful initialization.
bogdanm 0:eff01767de02 111 * @retval NRF_ERROR_INVALID_PARAM Invalid parameter (buffer not aligned to a 4 byte boundary).
bogdanm 0:eff01767de02 112 * @retval NRF_ERROR_INALID_STATE If @ref app_gpiote_init has not been called on the GPIOTE
bogdanm 0:eff01767de02 113 * module.
bogdanm 0:eff01767de02 114 * @retval NRF_ERROR_NO_MEM Returned if the application tries to register more users
bogdanm 0:eff01767de02 115 * than defined when the GPIOTE module was initialized in
bogdanm 0:eff01767de02 116 * @ref app_gpiote_init.
bogdanm 0:eff01767de02 117 */
bogdanm 0:eff01767de02 118 uint32_t app_gpiote_user_register(app_gpiote_user_id_t * p_user_id,
bogdanm 0:eff01767de02 119 uint32_t pins_low_to_high_mask,
bogdanm 0:eff01767de02 120 uint32_t pins_high_to_low_mask,
bogdanm 0:eff01767de02 121 app_gpiote_event_handler_t event_handler);
bogdanm 0:eff01767de02 122
bogdanm 0:eff01767de02 123 /**@brief Function for informing the GPIOTE module that the specified user wants to use the GPIOTE module.
bogdanm 0:eff01767de02 124 *
bogdanm 0:eff01767de02 125 * @param[in] user_id Id of user to enable.
bogdanm 0:eff01767de02 126 *
bogdanm 0:eff01767de02 127 * @retval NRF_SUCCESS On success.
bogdanm 0:eff01767de02 128 * @retval NRF_ERROR_INVALID_PARAM Invalid user_id provided, No a valid user.
bogdanm 0:eff01767de02 129 * @retval NRF_ERROR_INALID_STATE If @ref app_gpiote_init has not been called on the GPIOTE
bogdanm 0:eff01767de02 130 * module.
bogdanm 0:eff01767de02 131 */
bogdanm 0:eff01767de02 132 uint32_t app_gpiote_user_enable(app_gpiote_user_id_t user_id);
bogdanm 0:eff01767de02 133
bogdanm 0:eff01767de02 134 /**@brief Function for informing the GPIOTE module that the specified user is done using the GPIOTE module.
bogdanm 0:eff01767de02 135 *
bogdanm 0:eff01767de02 136 * @param[in] user_id Id of user to enable.
bogdanm 0:eff01767de02 137 *
bogdanm 0:eff01767de02 138 * @return NRF_SUCCESS On success.
bogdanm 0:eff01767de02 139 * @retval NRF_ERROR_INVALID_PARAM Invalid user_id provided, No a valid user.
bogdanm 0:eff01767de02 140 * @retval NRF_ERROR_INALID_STATE If @ref app_gpiote_init has not been called on the GPIOTE
bogdanm 0:eff01767de02 141 * module.
bogdanm 0:eff01767de02 142 */
bogdanm 0:eff01767de02 143 uint32_t app_gpiote_user_disable(app_gpiote_user_id_t user_id);
bogdanm 0:eff01767de02 144
bogdanm 0:eff01767de02 145 /**@brief Function for getting the state of the pins which are registered for the specified user.
bogdanm 0:eff01767de02 146 *
bogdanm 0:eff01767de02 147 * @param[in] user_id Id of user to check.
bogdanm 0:eff01767de02 148 * @param[out] p_pins Bit mask corresponding to the pins configured to generate events to
bogdanm 0:eff01767de02 149 * the specified user. All bits corresponding to pins in the state
bogdanm 0:eff01767de02 150 * 'high' will have value '1', all others will have value '0'.
bogdanm 0:eff01767de02 151 *
bogdanm 0:eff01767de02 152 * @return NRF_SUCCESS On success.
bogdanm 0:eff01767de02 153 * @retval NRF_ERROR_INVALID_PARAM Invalid user_id provided, No a valid user.
bogdanm 0:eff01767de02 154 * @retval NRF_ERROR_INALID_STATE If @ref app_gpiote_init has not been called on the GPIOTE
bogdanm 0:eff01767de02 155 * module.
bogdanm 0:eff01767de02 156 */
bogdanm 0:eff01767de02 157 uint32_t app_gpiote_pins_state_get(app_gpiote_user_id_t user_id, uint32_t * p_pins);
bogdanm 0:eff01767de02 158
bogdanm 0:eff01767de02 159 #endif // APP_GPIOTE_H__
bogdanm 0:eff01767de02 160
bogdanm 0:eff01767de02 161 /** @} */