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author | Trygve Laugstøl <trygvis@inamo.no> | 2018-08-23 17:08:59 +0200 |
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committer | Trygve Laugstøl <trygvis@inamo.no> | 2018-08-23 17:12:21 +0200 |
commit | 3061ecca3d0fdfb87dabbf5f63c9e06c2a30f53a (patch) | |
tree | ab49cc16ed0b853452c5c2ed2d3042416d628986 /thirdparty/nRF5_SDK_15.0.0_a53641a/examples/peripheral/blinky_rtc_freertos/main.c | |
download | iot-sensors-master.tar.gz iot-sensors-master.tar.bz2 iot-sensors-master.tar.xz iot-sensors-master.zip |
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/examples/peripheral/blinky_rtc_freertos/main.c')
-rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/examples/peripheral/blinky_rtc_freertos/main.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/examples/peripheral/blinky_rtc_freertos/main.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/examples/peripheral/blinky_rtc_freertos/main.c new file mode 100644 index 0000000..9e9e32d --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/examples/peripheral/blinky_rtc_freertos/main.c @@ -0,0 +1,188 @@ +/** + * Copyright (c) 2017 - 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. + * + */ +/** @file + * @defgroup blinky_rtc_freertos_example_main main.c + * @{ + * @ingroup blinky_rtc_freertos_example + * + * @brief Blinky FreeRTOS Example Application main file. + * + * This file contains the source code for a sample application using FreeRTOS to blink LEDs. + * + */ + +#include <stdbool.h> +#include <stdint.h> + +#include "FreeRTOS.h" +#include "semphr.h" +#include "timers.h" +#include "bsp.h" +#include "nordic_common.h" +#include "nrf_drv_clock.h" +#include "sdk_errors.h" +#include "app_error.h" +#include "nrf_drv_rtc.h" + + +#if LEDS_NUMBER <= 2 +#error "Board is not equipped with enough amount of LEDs" +#endif + +/** + * @brief RTC instance number used for blinking + * + */ +#define BLINK_RTC 2 + +/** + * @brief RTC compare channel used + * + */ +#define BLINK_RTC_CC 0 + +/** + * @brief Number of RTC ticks between interrupts + */ +#define BLINK_RTC_TICKS (RTC_US_TO_TICKS(500000ULL, RTC_DEFAULT_CONFIG_FREQUENCY)) + +/** + * @brief Reference to LED0 toggling FreeRTOS task. + */ +static TaskHandle_t m_led_toggle_task_handle; + +/** + * @brief Semaphore set in RTC event + */ +static SemaphoreHandle_t m_led_semaphore; + +/** + * @brief RTC configuration + */ +static nrf_drv_rtc_config_t const m_rtc_config = NRF_DRV_RTC_DEFAULT_CONFIG; + +/** + * @brief RTC instance + * + * Instance of the RTC used for led blinking + */ +static nrf_drv_rtc_t const m_rtc = NRF_DRV_RTC_INSTANCE(BLINK_RTC); + + +static void blink_rtc_handler(nrf_drv_rtc_int_type_t int_type) +{ + BaseType_t yield_req = pdFALSE; + ret_code_t err_code; + bsp_board_led_invert(BSP_BOARD_LED_1); + err_code = nrf_drv_rtc_cc_set( + &m_rtc, + BLINK_RTC_CC, + (nrf_rtc_cc_get(m_rtc.p_reg, BLINK_RTC_CC) + BLINK_RTC_TICKS) & RTC_COUNTER_COUNTER_Msk, + true); + APP_ERROR_CHECK(err_code); + + /* The returned value may be safely ignored, if error is returned it only means that + * the semaphore is already given (raised). */ + UNUSED_VARIABLE(xSemaphoreGiveFromISR(m_led_semaphore, &yield_req)); + portYIELD_FROM_ISR(yield_req); +} + +/** + * @brief LED0 task entry function. + * + * @param[in] pvParameter Pointer that will be used as the parameter for the task. + */ +static void led_toggle_task_function (void * pvParameter) +{ + ret_code_t err_code; + + err_code = nrf_drv_rtc_init(&m_rtc, &m_rtc_config, blink_rtc_handler); + APP_ERROR_CHECK(err_code); + err_code = nrf_drv_rtc_cc_set(&m_rtc, BLINK_RTC_CC, BLINK_RTC_TICKS, true); + APP_ERROR_CHECK(err_code); + nrf_drv_rtc_enable(&m_rtc); + + m_led_semaphore = xSemaphoreCreateBinary(); + ASSERT(NULL != m_led_semaphore); + + UNUSED_PARAMETER(pvParameter); + while (true) + { + bsp_board_led_invert(BSP_BOARD_LED_0); + + /* Wait for the event from the RTC */ + UNUSED_RETURN_VALUE(xSemaphoreTake(m_led_semaphore, portMAX_DELAY)); + } + + /* Tasks must be implemented to never return... */ +} + + +int main(void) +{ + ret_code_t err_code; + + /* Initialize clock driver for better time accuracy in FREERTOS */ + err_code = nrf_drv_clock_init(); + APP_ERROR_CHECK(err_code); + + /* Configure LED-pins as outputs */ + bsp_board_init(BSP_INIT_LEDS); + + /* Create task for LED0 blinking with priority set to 2 */ + UNUSED_VARIABLE(xTaskCreate(led_toggle_task_function, "LED0", configMINIMAL_STACK_SIZE + 200, NULL, 2, &m_led_toggle_task_handle)); + + /* Activate deep sleep mode */ + SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk; + + /* Start FreeRTOS scheduler. */ + vTaskStartScheduler(); + + while (true) + { + ASSERT(false); + /* FreeRTOS should not be here... FreeRTOS goes back to the start of stack + * in vTaskStartScheduler function. */ + } +} + +/** + * @} + */ |