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FreeRTOS で sleep() 相当をする

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ふつうの C プログラムの感覚で sleep(1) とか書いてしまうと、FreeRTOS では全体が停止してしまい、マルチタスクにならない。

特定のタスクを止める場合は以下のようにする。

void someTask(void *pvParams) {
    printf("sleep 3sec... ");
    const TickType_t delay = 3000 / portTICK_PERIOD_MS;  // 3sec.
    vTaskDelay(delay);
    printf("done\n");
}
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