Microbug
bugfix for duplicate symbol
Fork of
nRF51822
by 
Nordic Semiconductor
Diff: nordic-sdk/components/libraries/gpiote/app_gpiote.c
- Revision:
- 177:7a1917171a20
- Parent:
- 111:be2a122ed2f7
--- a/nordic-sdk/components/libraries/gpiote/app_gpiote.c Wed Apr 15 09:24:27 2015 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,360 +0,0 @@
-/* Copyright (c) 2012 Nordic Semiconductor. All Rights Reserved.
- *
- * The information contained herein is property of Nordic Semiconductor ASA.
- * Terms and conditions of usage are described in detail in NORDIC
- * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
- *
- * Licensees are granted free, non-transferable use of the information. NO
- * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
- * the file.
- *
- */
-
-#include "app_gpiote.h"
-#include <stdlib.h>
-#include <string.h>
-#include "app_util.h"
-#include "app_util_platform.h"
-#include "nrf_error.h"
-#include "nrf_gpio.h"
-
-
-/**@brief GPIOTE user type. */
-typedef struct
-{
- uint32_t pins_mask; /**< Mask defining which pins user wants to monitor. */
- uint32_t pins_low_to_high_mask; /**< Mask defining which pins will generate events to this user when toggling low->high. */
- uint32_t pins_high_to_low_mask; /**< Mask defining which pins will generate events to this user when toggling high->low. */
- uint32_t sense_high_pins; /**< Mask defining which pins are configured to generate GPIOTE interrupt on transition to high level. */
- app_gpiote_event_handler_t event_handler; /**< Pointer to function to be executed when an event occurs. */
-} gpiote_user_t;
-
-STATIC_ASSERT(sizeof(gpiote_user_t) <= GPIOTE_USER_NODE_SIZE);
-STATIC_ASSERT(sizeof(gpiote_user_t) % 4 == 0);
-
-static uint32_t m_enabled_users_mask; /**< Mask for tracking which users are enabled. */
-static uint8_t m_user_array_size; /**< Size of user array. */
-static uint8_t m_user_count; /**< Number of registered users. */
-static gpiote_user_t * mp_users = NULL; /**< Array of GPIOTE users. */
-
-
-/**@brief Function for toggling sense level for specified pins.
- *
- * @param[in] p_user Pointer to user structure.
- * @param[in] pins Bitmask specifying for which pins the sense level is to be toggled.
- */
-static void sense_level_toggle(gpiote_user_t * p_user, uint32_t pins)
-{
- uint32_t pin_no;
-
- for (pin_no = 0; pin_no < NO_OF_PINS; pin_no++)
- {
- uint32_t pin_mask = (1 << pin_no);
-
- if ((pins & pin_mask) != 0)
- {
- uint32_t sense;
-
- // Invert sensing.
- if ((p_user->sense_high_pins & pin_mask) == 0)
- {
- sense = GPIO_PIN_CNF_SENSE_High << GPIO_PIN_CNF_SENSE_Pos;
- p_user->sense_high_pins |= pin_mask;
- }
- else
- {
- sense = GPIO_PIN_CNF_SENSE_Low << GPIO_PIN_CNF_SENSE_Pos;
- p_user->sense_high_pins &= ~pin_mask;
- }
-
- NRF_GPIO->PIN_CNF[pin_no] &= ~GPIO_PIN_CNF_SENSE_Msk;
- NRF_GPIO->PIN_CNF[pin_no] |= sense;
- }
- }
-}
-
-
-/**@brief Function for handling the GPIOTE interrupt.
- */
-void GPIOTE_IRQHandler(void)
-{
- uint8_t i;
- uint32_t pins_changed;
- uint32_t pins_state = NRF_GPIO->IN;
-
- // Clear event.
- NRF_GPIOTE->EVENTS_PORT = 0;
-
- // Check all users.
- for (i = 0; i < m_user_count; i++)
- {
- gpiote_user_t * p_user = &mp_users[i];
-
- // Check if user is enabled.
- if (((1 << i) & m_enabled_users_mask) != 0)
- {
- uint32_t transition_pins;
- uint32_t event_low_to_high;
- uint32_t event_high_to_low;
-
- // Find set of pins on which there has been a transition.
- transition_pins = (pins_state ^ ~p_user->sense_high_pins) & p_user->pins_mask;
-
- // Toggle SENSE level for all pins that have changed state.
- sense_level_toggle(p_user, transition_pins);
-
- // Second read after setting sense.
- // Check if any pins have changed while serving this interrupt.
- pins_changed = NRF_GPIO->IN ^ pins_state;
- if (pins_changed)
- {
- // Transition pins detected in late stage.
- uint32_t late_transition_pins;
-
- pins_state |= pins_changed;
-
- // Find set of pins on which there has been a transition.
- late_transition_pins = (pins_state ^ ~p_user->sense_high_pins) & p_user->pins_mask;
-
- // Toggle SENSE level for all pins that have changed state in last phase.
- sense_level_toggle(p_user, late_transition_pins);
-
- // Update pins that has changed state since the interrupt occurred.
- transition_pins |= late_transition_pins;
- }
-
- // Call user event handler if an event has occurred.
- event_high_to_low = (~pins_state & p_user->pins_high_to_low_mask) & transition_pins;
- event_low_to_high = (pins_state & p_user->pins_low_to_high_mask) & transition_pins;
-
- if ((event_low_to_high | event_high_to_low) != 0)
- {
- p_user->event_handler(event_low_to_high, event_high_to_low);
- }
- }
- }
-}
-
-
-/**@brief Function for sense disabling for all pins for specified user.
- *
- * @param[in] user_id User id.
- */
-static void pins_sense_disable(app_gpiote_user_id_t user_id)
-{
- uint32_t pin_no;
-
- for (pin_no = 0; pin_no < 32; pin_no++)
- {
- if ((mp_users[user_id].pins_mask & (1 << pin_no)) != 0)
- {
- NRF_GPIO->PIN_CNF[pin_no] &= ~GPIO_PIN_CNF_SENSE_Msk;
- NRF_GPIO->PIN_CNF[pin_no] |= GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos;
- }
- }
-}
-
-
-uint32_t app_gpiote_init(uint8_t max_users, void * p_buffer)
-{
- if (p_buffer == NULL)
- {
- return NRF_ERROR_INVALID_PARAM;
- }
-
- // Check that buffer is correctly aligned.
- if (!is_word_aligned(p_buffer))
- {
- return NRF_ERROR_INVALID_PARAM;
- }
-
- // Initialize file globals.
- mp_users = (gpiote_user_t *)p_buffer;
- m_user_array_size = max_users;
- m_user_count = 0;
- m_enabled_users_mask = 0;
-
- memset(mp_users, 0, m_user_array_size * sizeof(gpiote_user_t));
-
- // Initialize GPIOTE interrupt (will not be enabled until app_gpiote_user_enable() is called).
- NRF_GPIOTE->INTENCLR = 0xFFFFFFFF;
-
- NVIC_ClearPendingIRQ(GPIOTE_IRQn);
- NVIC_SetPriority(GPIOTE_IRQn, APP_IRQ_PRIORITY_HIGH);
- NVIC_EnableIRQ(GPIOTE_IRQn);
-
- return NRF_SUCCESS;
-}
-
-
-uint32_t app_gpiote_user_register(app_gpiote_user_id_t * p_user_id,
- uint32_t pins_low_to_high_mask,
- uint32_t pins_high_to_low_mask,
- app_gpiote_event_handler_t event_handler)
-{
- // Check state and parameters.
- if (mp_users == NULL)
- {
- return NRF_ERROR_INVALID_STATE;
- }
- if (event_handler == NULL)
- {
- return NRF_ERROR_INVALID_PARAM;
- }
- if (m_user_count >= m_user_array_size)
- {
- return NRF_ERROR_NO_MEM;
- }
-
- // Allocate new user.
- mp_users[m_user_count].pins_mask = pins_low_to_high_mask | pins_high_to_low_mask;
- mp_users[m_user_count].pins_low_to_high_mask = pins_low_to_high_mask;
- mp_users[m_user_count].pins_high_to_low_mask = pins_high_to_low_mask;
- mp_users[m_user_count].event_handler = event_handler;
-
- *p_user_id = m_user_count++;
-
- // Make sure SENSE is disabled for all pins.
- pins_sense_disable(*p_user_id);
-
- return NRF_SUCCESS;
-}
-
-
-uint32_t app_gpiote_user_enable(app_gpiote_user_id_t user_id)
-{
- uint32_t pin_no;
- uint32_t pins_state;
-
- // Check state and parameters.
- if (mp_users == NULL)
- {
- return NRF_ERROR_INVALID_STATE;
- }
- if (user_id >= m_user_count)
- {
- return NRF_ERROR_INVALID_PARAM;
- }
-
- // Clear any pending event.
- NRF_GPIOTE->EVENTS_PORT = 0;
- pins_state = NRF_GPIO->IN;
-
- // Enable user.
- if (m_enabled_users_mask == 0)
- {
- NRF_GPIOTE->INTENSET = GPIOTE_INTENSET_PORT_Msk;
- }
- m_enabled_users_mask |= (1 << user_id);
-
- // Enable sensing for all pins for specified user.
- mp_users[user_id].sense_high_pins = 0;
- for (pin_no = 0; pin_no < 32; pin_no++)
- {
- uint32_t pin_mask = (1 << pin_no);
-
- if ((mp_users[user_id].pins_mask & pin_mask) != 0)
- {
- uint32_t sense;
-
- if ((pins_state & pin_mask) != 0)
- {
- sense = GPIO_PIN_CNF_SENSE_Low << GPIO_PIN_CNF_SENSE_Pos;
- }
- else
- {
- sense = GPIO_PIN_CNF_SENSE_High << GPIO_PIN_CNF_SENSE_Pos;
- mp_users[user_id].sense_high_pins |= pin_mask;
- }
-
- NRF_GPIO->PIN_CNF[pin_no] &= ~GPIO_PIN_CNF_SENSE_Msk;
- NRF_GPIO->PIN_CNF[pin_no] |= sense;
- }
- }
-
- return NRF_SUCCESS;
-}
-
-
-uint32_t app_gpiote_user_disable(app_gpiote_user_id_t user_id)
-{
- // Check state and parameters.
- if (mp_users == NULL)
- {
- return NRF_ERROR_INVALID_STATE;
- }
- if (user_id >= m_user_count)
- {
- return NRF_ERROR_INVALID_PARAM;
- }
-
- // Disable sensing for all pins for specified user.
- pins_sense_disable(user_id);
-
- // Disable user.
- m_enabled_users_mask &= ~(1UL << user_id);
- if (m_enabled_users_mask == 0)
- {
- NRF_GPIOTE->INTENCLR = GPIOTE_INTENSET_PORT_Msk;
- }
-
- return NRF_SUCCESS;
-}
-
-
-uint32_t app_gpiote_pins_state_get(app_gpiote_user_id_t user_id, uint32_t * p_pins)
-{
- gpiote_user_t * p_user;
-
- // Check state and parameters.
- if (mp_users == NULL)
- {
- return NRF_ERROR_INVALID_STATE;
- }
- if (user_id >= m_user_count)
- {
- return NRF_ERROR_INVALID_PARAM;
- }
-
- // Get pins.
- p_user = &mp_users[user_id];
- *p_pins = NRF_GPIO->IN & p_user->pins_mask;
-
- return NRF_SUCCESS;
-}
-
-#if defined(SVCALL_AS_NORMAL_FUNCTION) || defined(SER_CONNECTIVITY)
-uint32_t app_gpiote_input_event_handler_register(const uint8_t channel,
- const uint32_t pin,
- const uint32_t polarity,
- app_gpiote_input_event_handler_t event_handler)
-{
- (void)sense_level_toggle(NULL, pin);
- return NRF_ERROR_NOT_SUPPORTED;
-}
-
-uint32_t app_gpiote_input_event_handler_unregister(const uint8_t channel)
-{
- return NRF_ERROR_NOT_SUPPORTED;
-}
-
-uint32_t app_gpiote_end_irq_event_handler_register(app_gpiote_input_event_handler_t event_handler)
-{
- return NRF_ERROR_NOT_SUPPORTED;
-}
-
-uint32_t app_gpiote_end_irq_event_handler_unregister(void)
-{
- return NRF_ERROR_NOT_SUPPORTED;
-}
-
-uint32_t app_gpiote_enable_interrupts(void)
-{
- return NRF_ERROR_NOT_SUPPORTED;
-}
-
-uint32_t app_gpiote_disable_interrupts(void)
-{
- return NRF_ERROR_NOT_SUPPORTED;
-}
-#endif // SVCALL_AS_NORMAL_FUNCTION || SER_CONNECTIVITY
\ No newline at end of file