编程实例

实例描述

本实例实现如下功能：

创建中断。
设置中断亲和性。
使能中断。
触发中断。
屏蔽中断。
删除中断。

编程示例

前提条件：menuconfig菜单中配置中断使用最大数、配置可设置的中断优先级个数。

代码实现如下：

#include "los_hwi.h"
#include "los_typedef.h"
#include "los_task.h"

STATIC VOID HwiUsrIrq(VOID)
{
    printf("\n in the func HwiUsrIrq \n"); 
}

/* cpu0 trigger, cpu0 response */
UINT32 It_Hwi_001(VOID)
{
    UINT32 ret;
    UINT32 irqNum = 26; /* ppi */
    UINT32 irqPri = 0x3;

    ret = LOS_HwiCreate(irqNum, irqPri, 0, (HWI_PROC_FUNC)HwiUsrIrq, 0);
    if (ret != LOS_OK) {
        return LOS_NOK;
    }

#ifdef LOSCFG_KERNEL_SMP
    ret = LOS_HwiSetAffinity(irqNum, CPUID_TO_AFFI_MASK(ArchCurrCpuid()));
    if (ret != LOS_OK) {
        return LOS_NOK;
    }
#endif
    ret = LOS_HwiEnable(irqNum);
    if (ret != LOS_OK) {
        return LOS_NOK;
    }

    ret = LOS_HwiTrigger(irqNum);
    if (ret != LOS_OK) {
        return LOS_NOK;
    }

    LOS_TaskDelay(1);

    ret = LOS_HwiDisable(irqNum);
    if (ret != LOS_OK) {
        return LOS_NOK;
    }

    ret = LOS_HwiDelete(irqNum, NULL);
    if (ret != LOS_OK) {
        return LOS_NOK;
    }

    return LOS_OK;
}