CE5 中断

一、intr.h里面定义硬件中断号

#define IRQ_EINT0           0
#define IRQ_EINT1           1
#define IRQ_EINT2           2
#define IRQ_EINT3           3
#define IRQ_EINT4           51
#define IRQ_EINT5           52
#define IRQ_EINT6           53
#define IRQ_EINT7           54
#define IRQ_EINT8           55
#define IRQ_EINT9           56
#define IRQ_EINT10         57
#define IRQ_EINT11         58
#define IRQ_EINT12         59
#define IRQ_EINT13         60
#define IRQ_EINT14         61
#define IRQ_EINT15         62
#define IRQ_EINT16         63    

二、在Bsp_cfg.h定义系统中断号

// Static SYSINTR Mapping for driver.
#define SYSINTR_OHCI             (SYSINTR_FIRMWARE+1)
#define SYSINTR_RFIDKEY          (SYSINTR_FIRMWARE+13)
#define SYSINTR_BAKTIMER         (SYSINTR_FIRMWARE+12)
#define SYSINTR_ETH              (SYSINTR_FIRMWARE+11)
#define SYSINTR_CHANGEBATT       (SYSINTR_FIRMWARE+10)
#define SYSINTR_SCANLKEY         (SYSINTR_FIRMWARE+9)
#define SYSINTR_SCANRKEY         (SYSINTR_FIRMWARE+7)
#define SYSINTR_SCANLED          (SYSINTR_FIRMWARE+6)
#define SYSINTR_VOLDEC           (SYSINTR_FIRMWARE+5)
#define SYSINTR_VOLINC           (SYSINTR_FIRMWARE+4)
#define SYSINTR_MATRIX0          (SYSINTR_FIRMWARE+3)

三、在BSPIntrInit()函数里把系统中断号和硬件中断号映射起来

BOOL BSPIntrInit()
{
    S3C2416_IOPORT_REG *pOalPortRegs;
    ULONG value;
    OALMSG(, (L"+++BSPIntrInit\r\n")); 
    // Then get virtual address for IO port
    pOalPortRegs = OALPAtoVA(S3C2416_BASE_REG_PA_IOPORT, FALSE);

    // Add static mapping for Built-In OHCI
    OALIntrStaticTranslate(SYSINTR_OHCI, 　　　　 IRQ_USBH);
    OALIntrStaticTranslate(SYSINTR_ETH,　　　　　　IRQ_EINT4);
    OALIntrStaticTranslate(SYSINTR_SCANLED,      IRQ_EINT9);
    OALIntrStaticTranslate(SYSINTR_RFIDKEY,      IRQ_EINT10);
    OALIntrStaticTranslate(SYSINTR_SCANRKEY,     IRQ_EINT11);
    OALIntrStaticTranslate(SYSINTR_SCANLKEY,     IRQ_EINT12);
    OALIntrStaticTranslate(SYSINTR_VOLDEC,       IRQ_EINT13);
    OALIntrStaticTranslate(SYSINTR_VOLINC,       IRQ_EINT14);
    OALIntrStaticTranslate(SYSINTR_MATRIX0,      IRQ_EINT15);
    OALIntrStaticTranslate(SYSINTR_BAKTIMER,　　  IRQ_TIMER0); 

    OALMSG(, (L"---BSPIntrInit(rc = 1)\r\n"));
    return TRUE;
}

四、使用时要把中断的IO设置为中断模式以及触发模式，这里设置为下降沿触发

BOOL InitVAdr()
{
    DWORD dwIOSize;
    PHYSICAL_ADDRESS  IOPhyAdr = { S3C2416_BASE_REG_PA_IOPORT,  };
    dwIOSize = sizeof(S3C2416_IOPORT_REG);
    if ( NULL == v_pIOP_BAK_regs)
    {　　v_pIOP_BAK_regs = (volatile S3C2416_IOPORT_REG *)MmMapIoSpace(IOPhyAdr, (ULONG)dwIOSize, FALSE);
    }//Setup EINT9, GPG1, failing edge triggered
    v_pIOP_BAK_regs->GPGUDP  &=~(<<); 　　// pull-up enable
    v_pIOP_BAK_regs->GPGUDP  |= (<<);
    v_pIOP_BAK_regs->GPGCON  &=~();
    v_pIOP_BAK_regs->GPGCON  |= ();
    v_pIOP_BAK_regs->EXTINT1 &=~();
    v_pIOP_BAK_regs->EXTINT1 |= ();

    RETAILMSG(BUZZER_DEBUG_MESSAGE, (TEXT("[BUZ]BuzzerInitVAdr\r\n")));
    return (NULL != v_pIOP_BAK_regs)? TRUE:FALSE;
}

五、创建一个事件，并让此事件关联硬件中断映射后的系统中断号，并创建一个线程去等待此中断事件

DWORD Init(){　　m_ScanledIntr = CreateEvent(NULL, FALSE, FALSE, NULL);
　　InterruptInitialize(SYSINTR_SCANLED, m_ScanledIntr, NULL, ) ;　　hKey = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)ScanledThread, NULL, 0, NULL);　　return TRUE;}

六、创建中断等待线程函数

DWORD ScanledThread()
{　　DWORD dwResult;　　)
    {
        dwResult = WaitForSingleObject(m_ScanledIntr, );
        if (dwResult == WAIT_OBJECT_0)
        {
　　　　　　　　//　　此处执行中断后的操作
            　//　　中断操作执行完后要告诉系统中断函数已执行完，然后开始等待下一个中断函数　　　　　　　　InterruptDone(SYSINTR_SCANLED);
        }
        else if (dwResult ==WAIT_TIMEOUT)
        {
           　　//　　此处执行中断等待超时操作
        }
    }
    ;
}