【FreeRTOS】任务调度

上下文切换接口

/**
 * task. h
 *
 * Macro for forcing a context switch.
 *
 * \defgroup taskYIELD taskYIELD
 * \ingroup SchedulerControl
 */
#define taskYIELD()                        portYIELD()

cortex-m4f架构上的实现

// FreeRTOS\Source\portable\IAR\ARM_CM4F\portmacro.h
#define portYIELD()                                 \
{                                                   \
    /* Set a PendSV to request a context switch. */ \
    portNVIC_INT_CTRL_REG = portNVIC_PENDSVSET_BIT; \
    __DSB();                                        \
    __ISB();                                        \
}

标签：__,portYIELD,FreeRTOS,portNVIC,taskYIELD,任务调度,define
来源： https://www.cnblogs.com/skullboyer/p/16195300.html