C程式語言學習

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freeRTOS Deleting a Task

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vTaskDelete() A task can use the vTaskDelete() API function to delete itself, or any other task. Note that the vTaskDelete() API function is available only when INCLUDE_vTaskDelete is set to 1 in FreeRTOSConfig.h. Deleted tasks no longer exist and cannot enter the Running state again. It is the responsibility of the idle task to free memory allocated to tasks that have since been deleted. Therefore, it is important that applications using the vTaskDelete() API function do not completely starve the idle task of all processing time . Note: Only memory allocated to a task by the kernel itself will be freed automatically when the task is deleted. Any memory or other resource that the implementation of the task allocated must be freed explicitly. void vTaskDelete( TaskHandle_t pxTaskToDelete ); pxTaskToDelete The handle of the task that is to be deleted (the subject task)—see the pxCreatedTask parameter of the xTaskCreate() API function for information on obtaining handles t...
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Interrupt Management

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Embedded real-time systems have to take actions in response to events that originate from the environment. For example, a packet arriving on an Ethernet peripheral (the event) might require passing to a TCP/IP stack for processing (the action). Non-trivial systems will have to service events that originate from multiple sources, all of which will have different processing overhead and response time requirements. In each case, a judgment has to be made as to the best event processing implementation strategy: How should the event be detected? Interrupts are normally used, but inputs can also be polled. When interrupts are used, how much processing should be performed inside the interrupt service routine (ISR), and how much outside? It is normally desirable to keep each ISR as short as possible. How events are communicated to the main (non-ISR) code, and how can this code be structured to best accommodate processing of potentially asynchronous occurrences? It is important to draw a distin...
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在ubuntu中編寫c語言

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1.安裝必要的編譯器 開啟Terminal輸入 sudo apt - get install build - essential   2.編寫.c的檔案 隨意使用一個文字編寫軟體編寫c語言後另存新檔為.c副檔名的檔案 ex:   #include<stdio.h> int main(){ printf("Hello"); return 0; } 另存新檔為.c檔 3.回到Terminal中進行編譯     這裡假設檔名為prog.c   開啟Terminal輸入  gcc prog.c -o canberun 4.最後執行程式      開啟Terminal輸入   ./ canberun 其中 canberun 為第3步我們將編譯後可執行檔的檔名此名稱能夠隨意命名  
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