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90 lines
2.4 KiB
C
90 lines
2.4 KiB
C
/*
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* Copyright (c) 2006-2022, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2018-08-24 yangjie the first version
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* 2020-10-17 Meco Man translate to English comment
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*/
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/*
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* Demo: event group
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*
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* This demo demonstrates statically creating an event group and using it to send events between two tasks.
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*
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*/
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#include <FreeRTOS.h>
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#include <event_groups.h>
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#include <task.h>
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#define TASK_PRIORITY (FINSH_THREAD_PRIORITY + 1)
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#define BIT_0 ( 1 << 0 )
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#define BIT_4 ( 1 << 4 )
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static EventGroupHandle_t xEventGroup = NULL;
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static StaticEventGroup_t xEventGroupBuffer;
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static TaskHandle_t TaskHandle1 = NULL;
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static TaskHandle_t TaskHandle2 = NULL;
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static void vTask1Code(void *pvParameters)
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{
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while (1)
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{
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EventBits_t uxBits;
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// Wait for both bit 0 and bit 4, clear bit before return
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uxBits = xEventGroupWaitBits(xEventGroup, BIT_0 | BIT_4, pdTRUE, pdTRUE, portMAX_DELAY);
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if ((uxBits & BIT_0) != 0)
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{
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rt_kprintf("Task 1 received bit 0\n");
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}
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if ((uxBits & BIT_4) != 0)
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{
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rt_kprintf("Task 1 received bit 4\n");
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}
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}
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}
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static void vTask2Code(void * pvParameters)
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{
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while (1)
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{
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rt_kprintf("Task 2 send bit 0\n");
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xEventGroupSetBits(xEventGroup, BIT_0);
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vTaskDelay(pdMS_TO_TICKS(1000));
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rt_kprintf("Task 2 send bit 4\n");
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xEventGroupSetBits(xEventGroup, BIT_4);
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vTaskDelay(pdMS_TO_TICKS(1000));
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}
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}
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int event_group_static(void)
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{
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xEventGroup = xEventGroupCreateStatic( &xEventGroupBuffer );
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vEventGroupDelete(xEventGroup);
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xEventGroup = xEventGroupCreateStatic( &xEventGroupBuffer );
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if (xEventGroup == NULL)
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{
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rt_kprintf("create event group failed.\n");
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return -1;
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}
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xTaskCreate( vTask1Code, "Task1", configMINIMAL_STACK_SIZE, NULL, TASK_PRIORITY + 1, &TaskHandle1 );
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if (TaskHandle1 == NULL)
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{
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rt_kprintf("Create task 1 failed\n");
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return -1;
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}
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xTaskCreate( vTask2Code, "Task2", configMINIMAL_STACK_SIZE, NULL, TASK_PRIORITY, &TaskHandle2 );
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if (TaskHandle2 == NULL)
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{
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rt_kprintf("Create task 2 failed\n");
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return -1;
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}
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return 0;
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}
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MSH_CMD_EXPORT(event_group_static, event group sample);
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