智能车制作

标题: pit中断《k10》 [打印本页]

作者: oneJN 时间: 2012-11-8 18:40
标题: pit中断《k10》
/*
* main implementation: use this 'C' sample to create your own application
*
*/

#include <stdio.h>

#include "derivative.h" /* include peripheral declarations */
#define GPIO_PIN(x)             (((1)<<(x & GPIO_PIN_MASK)))
#define GPIO_PIN_MASK          0x1Fu

#define PORTA PTA_BASE_PTR
#define PORTB PTB_BASE_PTR
#define PORTC PTC_BASE_PTR
#define PORTD PTD_BASE_PTR
#define PORTE PTE_BASE_PTR
typedef unsigned char             uint8;  /*  8 bits */
typedef unsigned short int       uint16; /* 16 bits */
typedef unsigned long int       uint32; /* 32 bits */

typedef char                         int8; /*  8 bits */
typedef short int             int16;  /* 16 bits */
typedef int                         int32;  /* 32 bits */

void PIT_Init()
{
SIM_SCGC6 |= 0x00800000;
PIT_MCR = 0x00;
PIT_TCTRL0 = 0x00;
PIT_TFLG0 = 0x01;
PIT_LDVAL0 = 10000000;
NVICISER2 |= 0x10;//使能中断NVICISERn=m,其中n=84/32,m=84%32
PIT_TCTRL0 = 0x03;

PIT_TCTRL1 = 0x00;
PIT_TFLG1 = 0x01;
PIT_LDVAL1 = 20000000;
NVICISER2 |= 0x20;//使能中断NVICISERn=m,其中n=85/32,m=85%32, NVICICER0 = 1 << (irq%32);
PIT_TCTRL1 = 0x03;
PIT_TCTRL2 = 0x00;
PIT_TFLG2 = 0x01;
PIT_LDVAL2 = 30000000;
NVICISER2 |= 0x40;//使能中断NVICISERn=m,其中n=86/32,m=86%32
PIT_TCTRL2 = 0x03;
PIT_TCTRL3 = 0x00;
PIT_TFLG3 = 0x01;
PIT_LDVAL3 = 40000000;
NVICISER2 |= 0x80;//使能中断NVICISERn=m,其中n=87/32,m=87%32
PIT_TCTRL3 = 0x03;
}

void gpio_init (GPIO_MemMapPtr port, int32 index, int32 dir, int32 data)//
{
      PORT_MemMapPtr p;
      /* Turn on all port clocks */
      //SIM_SCGC5 = SIM_SCGC5_PORTA_MASK | SIM_SCGC5_PORTB_MASK | SIM_SCGC5_PORTC_MASK | SIM_SCGC5_PORTD_MASK | SIM_SCGC5_PORTE_MASK;
      switch((uint32)port)
      {
      case 0x400FF000u:
            p = PORTA_BASE_PTR;
            SIM_SCGC5 |= SIM_SCGC5_PORTA_MASK; //开PORTA使能时钟
            break;
      case 0x400FF040u:
            p = PORTB_BASE_PTR;
            SIM_SCGC5 |= SIM_SCGC5_PORTB_MASK; //开PORTB使能时钟
            break;
      case 0x400FF080u:
            p = PORTC_BASE_PTR;
            SIM_SCGC5 |= SIM_SCGC5_PORTC_MASK; //开PORTC使能时钟
            break;
      case 0x400FF0C0u:
            p = PORTD_BASE_PTR; //((GPIO_MemMapPtr)0x400FF0C0u)
            SIM_SCGC5 |= SIM_SCGC5_PORTD_MASK; //开PORTD使能时钟
            break;
      case 0x400FF100u:
            p = PORTE_BASE_PTR;
            SIM_SCGC5 |= SIM_SCGC5_PORTE_MASK; //开PORTE使能时钟
            break;
      default:
            break;
      }
      PORT_PCR_REG(p,index) = (0|PORT_PCR_MUX(1));  //配置PORT口德MUX为为GPIO模式
      if(dir == 1)                               //output
      {
            GPIO_PDDR_REG(port) |= (1<<index);    //配置PORTn口的第index引脚为输出
            if(data == 1)                         //设置输出值
                     GPIO_PDOR_REG(port) |= (1<<index);  //端口输出值为1
            else
                     GPIO_PDOR_REG(port) &= ~(1<<index); //端口输出值为0
      }
      else                   //设置为输入口
      {
            GPIO_PDDR_REG(port) &= ~(1<<index);
            if(data == 1)                         //上拉电阻
                     PORT_PCR_REG(p,index) |= PORT_PCR_PS_MASK;
            else             //下拉电阻
                     PORT_PCR_REG(p,index) &= ~(PORT_PCR_PS_MASK);
                     PORT_PCR_REG(p,index) |= PORT_PCR_PE_MASK;

      }
      //GPIO_PDDR_PDD();
      //GPIOD_PDDR;
}

* 函数名：gpio_reverse
* 功    能：改变引脚状态
* 参    数： port：端口名
*       index：指定端口引脚
* 返    回：无
* 说    明：无
************************************************/
void gpio_reverse(GPIO_MemMapPtr port, int32 index)
{
      GPIO_PTOR_REG(port) |= (1<<index); //PTOR,toggle output，输出翻转
}

int main(void)
{

PIT_Init();
gpio_init(PORTD,4,1,1);
while(1)
{;}

}
void pit0_isr(void)
{
//uint32 c;
//PIT_TCTRL0 &= ~(PIT_TCTRL_TEN_MASK|PIT_TCTRL_TIE_MASK);//定时器中断使能定时器使能
PIT_TFLG0=PIT_TFLG_TIF_MASK;//标志位清除
//GPIOA_PTOR=0X0003E000;//
//c=PIT_CVAL0;
GPIOD_PDDR &= ~GPIO_PDDR_PDD(GPIO_PIN(1));
PIT_LDVAL0 = 5000000;             //设置时间 time*系统时钟*1000 50ms
gpio_reverse (PTD_BASE_PTR,4);

}
在向量表中修改中断irq名称的说
我是新手，学K10

作者: oneJN 时间: 2012-11-8 18:42
//设置时间 time*系统时钟*1000 50ms
这个程序默认系统时钟，未倍频，50ms估计不准

作者: jiyiboloann 时间: 2012-11-8 20:20
在startup.c文件中有中断向量表，找到对应中断源的中断号，并修改中断服务函数名称。

作者: yandld 时间: 2013-8-25 10:31
http://www.znczz.com/thread-123546-1-1.html

作者: yandld 时间: 2013-8-25 10:32
要开PIT内部的中断和 NVIC中断，具体看这里http://www.znczz.com/thread-123546-1-1.html

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