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