136 lines
4.6 KiB
C
136 lines
4.6 KiB
C
/**
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* Copyright (c) 2014 - 2020, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/** @file
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*
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* @defgroup gpiote_example_main main.c
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* @{
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* @ingroup nrf_gpiote_example
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* @brief GPIOTE Example Application main file.
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*
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* This file contains the source code for a sample application using GPIOTE.
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*/
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#include <stdbool.h>
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#include <stdint.h>
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#include "nrf.h"
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#include "nrf_gpiote.h"
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#include "nrf_gpio.h"
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#include "boards.h"
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#include "nrf_drv_ppi.h"
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#include "nrf_drv_timer.h"
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#include "nrf_drv_gpiote.h"
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#include "app_error.h"
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#ifdef BSP_LED_0
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#define GPIO_OUTPUT_PIN_NUMBER BSP_LED_0 /**< Pin number for output. */
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#endif
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#ifndef GPIO_OUTPUT_PIN_NUMBER
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#error "Please indicate output pin"
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#endif
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static nrf_drv_timer_t timer = NRF_DRV_TIMER_INSTANCE(0);
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void timer_dummy_handler(nrf_timer_event_t event_type, void * p_context){}
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static void led_blinking_setup()
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{
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uint32_t compare_evt_addr;
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uint32_t gpiote_task_addr;
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nrf_ppi_channel_t ppi_channel;
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ret_code_t err_code;
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nrf_drv_gpiote_out_config_t config = GPIOTE_CONFIG_OUT_TASK_TOGGLE(false);
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err_code = nrf_drv_gpiote_out_init(GPIO_OUTPUT_PIN_NUMBER, &config);
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APP_ERROR_CHECK(err_code);
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nrf_drv_timer_extended_compare(&timer, (nrf_timer_cc_channel_t)0, 200 * 1000UL, NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK, false);
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err_code = nrf_drv_ppi_channel_alloc(&ppi_channel);
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APP_ERROR_CHECK(err_code);
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compare_evt_addr = nrf_drv_timer_event_address_get(&timer, NRF_TIMER_EVENT_COMPARE0);
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gpiote_task_addr = nrf_drv_gpiote_out_task_addr_get(GPIO_OUTPUT_PIN_NUMBER);
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err_code = nrf_drv_ppi_channel_assign(ppi_channel, compare_evt_addr, gpiote_task_addr);
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APP_ERROR_CHECK(err_code);
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err_code = nrf_drv_ppi_channel_enable(ppi_channel);
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APP_ERROR_CHECK(err_code);
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nrf_drv_gpiote_out_task_enable(GPIO_OUTPUT_PIN_NUMBER);
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}
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/**
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* @brief Function for application main entry.
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*/
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int main(void)
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{
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ret_code_t err_code;
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err_code = nrf_drv_ppi_init();
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APP_ERROR_CHECK(err_code);
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err_code = nrf_drv_gpiote_init();
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APP_ERROR_CHECK(err_code);
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nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;
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err_code = nrf_drv_timer_init(&timer, &timer_cfg, timer_dummy_handler);
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APP_ERROR_CHECK(err_code);
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#ifdef NRF51
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//Workaround for PAN-73.
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*(uint32_t *)0x40008C0C = 1;
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#endif
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// Setup PPI channel with event from TIMER compare and task GPIOTE pin toggle.
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led_blinking_setup();
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// Enable timer
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nrf_drv_timer_enable(&timer);
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while (true)
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{
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// Do Nothing - GPIO can be toggled without software intervention.
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}
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}
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/** @} */
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