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一下为三星的中断测试代码<br />未见有将cpsr中的IRQ中断屏蔽为I请零的操作。却能中断，这是为什么？????<br /><br /><br /><br /><br />void Test_Eint(void)<br />{<br /> int i;<br /> int extintMode;<br /><br /> Uart_Printf("[External Interrupt Test through PF0/2/11/19]\n");<br /><br /> Uart_Printf("1.L-LEVEL 2.H-LEVEL 3.F-EDGE 4.R-EDGE 5.B-EDGE\n");<br /> Uart_Printf("Select the external interrupt type.\n");<br /> extintMode=Uart_Getch();<br /><br /> //extintMode='3';<br /> rGPFCON = (rGPFCON & 0xffcc)|(1<<5)|(1<<1); //PF0/2 = EINT0/2<br /> rGPGCON = (rGPGCON & 0xff3fff3f)|(1<<23)|(1<<7); //PG3/11 = EINT11/19<br /> <br /> switch(extintMode)<br /> {<br /> case '1':<br /> rEXTINT0 = (rEXTINT0 & ~((7<<8) | (0x7<<0))) | 0x0<<8 | 0x0<<0; //EINT0/2=low level triggered<br /> rEXTINT1 = (rEXTINT1 & ~(7<<12)) | 0x0<<12; //EINT11=low level triggered<br /> rEXTINT2 = (rEXTINT2 & ~(7<<12)) | 0x0<<12; //EINT19=low level triggered<br /> break;<br /> case '2':<br /> rEXTINT0 = (rEXTINT0 & ~((7<<8) | (0x7<<0))) | 0x1<<8 | 0x1<<0; //EINT0/2=high level triggered<br /> rEXTINT1 = (rEXTINT1 & ~(7<<12)) | 0x1<<12; //EINT11=high level triggered<br /> rEXTINT2 = (rEXTINT2 & ~(7<<12)) | 0x1<<12; //EINT19=high level triggered<br /> break;<br /> case '3':<br /> rEXTINT0 = (rEXTINT0 & ~((7<<8) | (0x7<<0))) | 0x2<<8 | 0x2<<0; //EINT0/2=falling edge triggered<br /> rEXTINT1 = (rEXTINT1 & ~(7<<12)) | 0x2<<12; //EINT11=falling edge triggered<br /> rEXTINT2 = (rEXTINT2 & ~(7<<12)) | 0x2<<12; //EINT19=falling edge triggered<br /> break;<br /> case '4':<br /> rEXTINT0 = (rEXTINT0 & ~((7<<8) | (0x7<<0))) | 0x4<<8 | 0x4<<0; //EINT0/2=rising edge triggered<br /> rEXTINT1 = (rEXTINT1 & ~(7<<12)) | 0x4<<12; //EINT11=rising edge triggered<br /> rEXTINT2 = (rEXTINT2 & ~(7<<12)) | 0x4<<12; //EINT19=rising edge triggered<br /> break;<br /> case '5':<br /> rEXTINT0 = (rEXTINT0 & ~((7<<8) | (0x7<<0))) | 0x6<<8 | 0x6<<0; //EINT0/2=both edge triggered<br /> rEXTINT1 = (rEXTINT1 & ~(7<<12)) | 0x6<<12; //EINT11=both edge triggered<br /> rEXTINT2 = (rEXTINT2 & ~(7<<12)) | 0x6<<12; //EINT19=both edge triggered<br /> break;<br /> default:<br /> break;<br /> }<br /><br /> Uart_Printf("Press the EINT0/2/11/19 buttons or Press any key to exit.\n");<br /><br /> pISR_EINT0=(U32)Eint0Int;<br /> pISR_EINT2=(U32)Eint2Int;<br /> pISR_EINT8_23=(U32)Eint11_19;<br /><br /> rEINTPEND = 0xffffff;<br /> rSRCPND = BIT_EINT0|BIT_EINT2|BIT_EINT8_23; //to clear the previous pending states<br /> rINTPND = BIT_EINT0|BIT_EINT2|BIT_EINT8_23;<br /> <br /> rEINTMASK=~( (1<<11)|(1<<19) );<br /> rINTMSK=~(BIT_EINT0|BIT_EINT2|BIT_EINT8_23);<br /> <br /> Uart_Getch();<br /> <br /> rEINTMASK=0xffffff;<br /> rINTMSK=BIT_ALLMSK;<br />}<br /> |
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