• 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  }
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  • 原文地址:https://www.cnblogs.com/zeedmood/p/2666914.html
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