mini2440外部中断EINT823六按键中断

1、#includedef.h#includeoption.h#include2440addr.h#include2440lib.h#includemmu.h#include2440slib.hU32key;/*staticvoid_irqEINT11_ISR(void)/清中断必须按一下三个的顺序rEINTPEND|=(111);/外部中断悬挂寄存器，清0无请求，1时有中断请求rSRCPND|=(15);/指示中断源状态，0无中断源请求，1时有中断源请求rINTPND|=(15);/指示中断状态，0无中断请求，1时有中断请求Uart_Printf(EINT11isoccurred.n);stat

2、icvoid_irqEINT8_ISR(void)/清中断必须按一下三个的顺序rEINTPEND|=(18);/外部中断悬挂寄存器，清0无请求，1时有中断请求rSRCPND|=(15);/指示中断源状态，0无中断源请求，1时有中断源请求rINTPND|=(15);/指示中断状态，0无中断请求，1时有中断请求Uart_Printf(EINT8isoccurred.n);*/U8Key_Scan(void)Delay(8000);if(rGPGDAT&(10)=0)return1;elseif(rGPGDAT&(13)=0)return2;elseif(rGPGDAT&(15)=0)return3

3、;elseif(rGPGDAT&(16)=0)return4;elseif(rGPGDAT&(17)=0)return5;elseif(rGPGDAT&(111)=0)return6;elsereturn0 xff;staticvoid_irqKey_ISR(void)/U32r;/EnterCritical(&r);if(rINTPND=BIT_EINT8_23)ClearPending(BIT_EINT8_23);if(rEINTPEND&(18)/Uart_Printf(eint11n);rEINTPEND|=18;if(rEINTPEND&(111)/Uart_Printf(eint1

4、1n);rEINTPEND|=111;if(rEINTPEND&(113)/Uart_Printf(eint11n);rEINTPEND|=113;if(rEINTPEND&(114)/Uart_Printf(eint11n);rEINTPEND|=114;if(rEINTPEND&(115)/Uart_Printf(eint11n);rEINTPEND|=115;if(rEINTPEND&(119)/Uart_Printf(eint19n);rEINTPEND|=119;key=Key_Scan();if(key=0 xff)Uart_Printf(Interruptoccur.Keyisr

5、eleased!n);elseUart_Printf(Interruptoccur.K%dispressed!n,key);/ExitCritical(&r);voidxmain(void)ChangeClockDivider(3,1);ChangeMPllValue(127,2,1);/405MHZMMU_Init();Isr_Init();Uart_Init(0,115200);Uart_Select(0);Uart_Printf(themainisrunning.n);/中断初始化/选择功能管脚/rGPGCON=rGPGCON&(30)|(20);/rGPGCON&(0 x82);/当G

6、PG0取10时，表示EINT8,即K1pl44rGPGCON=rGPGCON&(322)|(36)|(30)|(310)|(312)|(314)|(222)|(26)|(20)|(210)|(212)|(214);/中断模式rINTMOD=rINTMOD&(1vv5);/EINT8-23:外部中断823p154/触发方式/rEXTINT1=(rEXTINT1|(70)&(40);/EINT8fallingedgetriggeredrEXTINT1&=(7|(70);rEXTINTl1=(0l(00);/EXTINT1用于设置EINT15EINT8触发信号的类型p146rEXTINT1&=(7|

7、(712);rEXTINT1|=(0|(0 x012);/EXTINT1用于设置EINT15EINT8触发信号的类型p146rEXTINT1&=(720);rEXTINT1|=(020);/seteint13fallingedgeintrEXTINT1&=(724);rEXTINT1|=(024);/seteint14fallingedgeintrEXTINT1&=(728);rEXTINT1|=(028);/seteint15fallingedgeintrEXTINT2&=(0 xf12);rEXTINT2|=(012);/seteint19fallingedgeint/使能中断rINTMS

8、K=rINTMSK&(15);/设定被中断屏蔽，0为中断服务有效，1为中断服务屏蔽p154/清中断/rSRCPND|=(18);/toclearEINT8/rEINTPEND|=(18);/cleareint8rEINTMASK&=(18)|(111)|(113)|(114)|(115)|(119);/p148外部中断掩码寄存器,3:0保留取值0,23:4控制相应的EINT23:4，清零使能相应的中断，置1时屏蔽中断/rEINTMASK&=(111);/enableeint11/中断向量/pISR_EINT0=(U32)EINT0_ISR;/EINT0/ExitCritical(&r);while(1)Uart_Printf(themainisrunnin