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標(biāo)題: stm8對電機(jī)調(diào)速程序 [打印本頁]

作者: fuyunzaihefang 時(shí)間: 2017-6-1 16:44
標(biāo)題: stm8對電機(jī)調(diào)速程序

#include"canshu.h"

uint t;

uchar time2_2h=4,time2_2l=4;

void TIM2_Init()

{

TIM2_CCMR2 = TIM2_CCMR2 | 0x70;// Output modePWM2.

//通道2被設(shè)置成比較輸出方式

// OC2M = 111,為PWM模式2，

// 向上計(jì)數(shù)時(shí)，若計(jì)數(shù)器小于比較值，為無效電平

// 即當(dāng)計(jì)數(shù)器在0到比較值時(shí)，輸出為1，否則為0

TIM2_CCMR1 = TIM2_CCMR1 | 0x70;

TIM2_CCMR3 = TIM2_CCMR3 | 0x70;

TIM2_CCER1 = TIM2_CCER1 | 0x33;// CC polarity low,enable PWMoutput */

// CC2P = 1，低電平為有效電平

// CC2E = 1，開啟輸出引腳

TIM2_CCER2 = TIM2_CCER2 | 0x03;

//初始化自動裝載寄存器，決定PWM方波的頻率，Fpwm=16000000/1000=16kHZ

TIM2_ARRH = 16000/255;

TIM2_ARRL = 16000%255;

TIM2_CCR1H =time2_2h;

TIM2_CCR1L = time2_2l=4;

//初始化比較寄存器，決定PWM方波的占空比

TIM2_CCR2H =1000/255;

TIM2_CCR2L =1000%255;

TIM2_CCR3H = 1000/255;

TIM2_CCR3L = 1000%255;

//初始化時(shí)鐘分頻器為1，即計(jì)數(shù)器的時(shí)鐘頻率為Fmaster=4MHZ

TIM2_PSCR =0x00;//因?yàn)橛昧死^電器，所以喲分頻,可到0x08,256分頻

//啟動計(jì)數(shù)

TIM2_CR1 = TIM2_CR1 | 0x01;

}

//外部中斷觸發(fā)

void exit_init()

{

PC_DDR&=~0x04;

PC_CR1|=0x04;

PC_CR2|=0x04;

EXTI_CR1|= 0x10;

}

#pragma vector=0x07 // 這里很關(guān)鍵！看下面說明。

__interrupt void EXTI_PC1(void)

{

asm("sim");

switch(EXTI_CR1)

{

case 0x10:EXTI_CR1=0x20;exit_flag=1;break;

case 0x20:EXTI_CR1=0x10;exit_flag=2;break;

default :exit_flag=0;break;

}

if(exit_flag==2)

{

t++;

exit_flag=0;

if(t%10==0)

{

ulong chaju;

now_nus=TIM4_CNTR;

now_ms=cishu;

chaju_ms=now_ms-last_ms;

if(cishu_flag==1)

{

cishu_flag=0;

chaju_ms=30000+now_ms-last_ms;

}

chaju_nus=now_nus-last_nus;

chaju=chaju_ms*250+chaju_nus;

now_rads=(1250000/chaju);

last_nus=now_nus;

last_ms=now_ms;

last_rads[rads_flag++]=now_rads;

if(rads_flag==10)

rads_flag=0;

pid_error=now_rads-last_radss;

pid_error1=last_radss-last_radsss;

last_radsss=last_radss;

last_radss =now_rads;

}

asm("rim");

}

#pragma vector=TIM2_OVR_UIF_vector

__interrupt void TIM3_OVF_IRQHandler(void)

{

TIM2_SR1 = 0x00;

ds1820_flag=1;

}

//定時(shí)器2產(chǎn)生60s的中斷

void TIM2_time()

{

TIM2_EGR=0x01; //手動產(chǎn)生更新事件，重新初始化計(jì)數(shù)器，并允許產(chǎn)生一個(gè)更新事件

//設(shè)置定時(shí)器初值

TIM2_CNTRH=0; //不能使用TIM3_CNTR直接設(shè)值，

TIM2_CNTRL=0;

//設(shè)定自動重裝寄存器值

//這里得注意不能使用TIM2_ARR的方式進(jìn)行設(shè)值，TIM2是十六位的。

//如TIM2_ARR=0xFA，實(shí)際上是賦給高字節(jié)了，TIM2_ARRH=0xFA，而不是想象中的賦給低字節(jié)。

TIM2_ARRH=0x72; //488hz 488 /29280 = 60s (1S)

TIM2_ARRL=0x60; //0x007d 意味著每產(chǎn)生一次中斷時(shí)間為60S

TIM2_PSCR=0x0f; //預(yù)分頻32275

TIM2_IER=0x01; //中斷允許位使能

TIM2_CR1=0x01; //使能計(jì)時(shí)器

}

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