嵌入式成长轨迹45【Zigbee项目】【CC2430基础实验】【外部中断】
PICTL (0x8C) – Port Interrupt Control
PICTL |= 0X11;
7 - 0 R0 Not used
6 PADSC Strength control for port pads in output mode. Selects output drive capability to account for low I/O supply voltage on pin DVDD.
0 Minimum drive capability
1 Maximum drive capability
5 P2IEN Port 2, inputs 4 to 0 interrupt enable. This bit enables interrupt requests for the port 2 inputs 4 to 0.
0 Interrupts are disabled
1 Interrupts are enabled
4 P0IENH Port 0, inputs 7 to 4 interrupt enable. This bit enables interrupt requests for the port 0 inputs 7 to 4.
0 Interrupts are disabled
1 Interrupts are enabled
3 P0IENL Port 0, inputs 3 to 0 interrupt enable. This bit enables interrupt requests for the port 0 inputs 3 to 0.
0 Interrupts are disabled
1 Interrupts are enabled
2 P2ICON Port 2, inputs 4 to 0 interrupt configuration. This bit s selects the interrupt request condition for all port 2 inputs
0 Rising edge on input gives interrupt
1 Falling edge on input gives interrupt
1 P1ICON
Port 1, inputs 7 to 0 interrupt configuration. This bit selects the interrupt request condition for all port 1 inputs
0 Rising edge on input gives interrupt
1 Falling edge on input gives interrupt
0 P0ICON Port 0, inputs 7 to 0 interrupt configuration. This bit selects the interrupt request condition for all port 0 inputs
0 Rising edge on input gives interrupt
1 Falling edge on input gives interrupt
IEN1 (0xB8) – Interrupt Enable 1
IEN1 |= 0X20; // P0IE = 1
7:6 - 00 R0 Not used. Read as 0
5 P0IE
P0IE – Port 0 interrupt enable
0 Interrupt disabled
1 Interrupt enabled
4 T4IE T4IE - Timer 4 interrupt enable
0 Interrupt disabled
1 Interrupt enabled
3 T3IE T3IE - Timer 3 interrupt enable
0 Interrupt disabled
1 Interrupt enabled
2 T2IE T2IE – Timer 2 interrupt enable
0 Interrupt disabled
1 Interrupt enabled
1 T1IE T1IE – Timer 1 interrupt enable
0 Interrupt disabled
1 Interrupt enabled
0 DMAIE DMAIE – DMA transfer interrupt enable
0 Interrupt disabled
1 Interrupt enabled
P0IFG (0x89) – Port 0 interrupt status flag
7:0 P0IF[7:0] Port 0, inputs 7 to 0 interrupt status flags. When an input port pin has an interrupt request pending, the corresponding flag bit will be set.
1 //main.c 2 #include <ioCC2430.h> 3 4 #define RLED P1_0 5 #define GLED P1_1 6 7 #define uchar unsigned char 8 #define uint unsigned int 9 10 /***************************************** 11 //函数声明 12 *****************************************/ 13 void Delay(uint n); 14 15 /***************************************** 16 //io及LED初始化 17 *****************************************/ 18 void Init_IO_AND_LED(void) 19 { 20 P1DIR = 0X03; //0为输入（默认），1为输出 21 RLED = 0; 22 GLED = 1; 23 24 P0SEL&=~0X60; 25 P0DIR&=~0X60; 26 27 P0INP|=0X60;//有上拉、下拉 28 29 /* 30 P1IEN |= 0X0c; //P12 P13 31 PICTL |= 0X02; //下降沿 32 */ 33 PICTL |= 0X11; //P0口中断允许，下降沿触发 34 35 EA = 1; 36 //IEN2 |= 0X10; // P1IE = 1; 37 IEN1 |= 0X20; // P0IE = 1 38 39 //P1IFG &= ~0x0C; //P12 P13中断标志清0 40 P0IFG &= ~0x60; //P05 P06中断标志清0 41 }; 42 43 /***************************************** 44 //主函数 45 *****************************************/ 46 void main(void) 47 { 48 Init_IO_AND_LED(); 49 while(1) 50 { 51 }; 52 } 53 54 /***************************************** 55 //延时 56 *****************************************/ 57 void Delay(uint n) 58 { 59 uint ii; 60 for(ii=0;ii<n;ii++); 61 for(ii=0;ii<n;ii++); 62 for(ii=0;ii<n;ii++); 63 for(ii=0;ii<n;ii++); 64 for(ii=0;ii<n;ii++); 65 } 66 67 /********************************************************************* 68 //中断服务程序 69 *********************************************************************/ 70 #pragma vector = P0INT_VECTOR 71 __interrupt void P0_ISR(void) 72 { 73 if(P0IFG>0) //按键中断 74 { 75 P0IFG = 0; 76 GLED = GLED; 77 RLED = !RLED; 78 } 79 P0IF = 0; //清中断标志 80 }
