我在考试中写了这段代码,但是有一些问题(由于这个原因,我失败了。)
在通过我的电路板进行调试时(我有一个atmel atmega328p Xplained mini),我不知道为什么,但是在进入主开关以及在 switch(currentstatus)和经过案例检查:我所有的状态变量都重置为零。 如果我通过模拟器调试它,似乎工作正常。
如果我将代码上传到板上,则效果不佳,就像它无法识别某些中断一样。
再加上我想问你一件事。我在考试中使用了一块子板,该子板无法访问PWM输出的正确引脚,而且我还必须驱动特定的输出(例如,子板的LED,例如在此代码中,我必须驱动PORTC5和PORTC4),所以我必须手动实现PWM 。我已经尝试实现您可以在代码中看到的解决方案(我正在使用1ms的计时器)。有没有更简单,更智能的解决方案?
你能帮我吗?
#include <avr/io.h>
#include <avr/interrupt.h>
typedef enum{checkled, heatingup, exposure, stop} machine;
machine currentstate=checkled;
typedef enum{twenty, fourty, sixty, eighty} brightness;
brightness light=twenty;
typedef enum{twoseconds, fourseconds, eightseconds, sixteenseconds} exposuretime;
exposuretime time=twoseconds;
volatile uint16_t tick=0;
volatile uint16_t oldtick=0;
volatile uint8_t flagchanged=0;
ISR(PCINT2_vect)
{
if((PIND&(1<<PIND2))==0)
{
if(currentstate==checkled)
currentstate=heatingup;
}
if((PIND&(1<<PIND3))==0)
{
if(currentstate==exposure || currentstate==heatingup)
{
currentstate=stop;
PORTC&=~(1<<PORTC4);
tick=0;
}
}
if((PIND&(1<<PIND4))==0)
{
if(currentstate==checkled)
{
flagchanged=1;
if(time==sixteenseconds)//rise time
;
else if(time==eightseconds)
time=sixteenseconds;
else if(time==fourseconds)
time=eightseconds;
else if(time==twoseconds)
time=fourseconds;
}
}
if((PIND&(1<<PIND5))==0)
{
if(currentstate==checkled)
{
flagchanged=1;
if(time==sixteenseconds)//decrease time
time=eightseconds;
else if(time==eightseconds)
time=fourseconds;
else if(time==fourseconds)
time=twoseconds;
else if(time==twoseconds)
;
}
}
if((PIND&(1<<PIND6))==0)
{
if(currentstate==checkled)
{
flagchanged=1;
if(light==eighty)//rise brightness
;
else if(light==sixty)
light=eighty;
else if(light==fourty)
light=sixty;
else if(light==twenty)
light=fourty;
}
}
if((PIND&(1<<PIND7))==0)
{
if(currentstate==checkled)
{
flagchanged=1;
if(light==eighty)//decrease brightness
light=sixty;
else if(light==sixty)
light=fourty;
else if(light==fourty)
light=twenty;
else if(light==twenty)
;
}
}
}
ISR(TIMER1_COMPA_vect)
{
tick++;
}
int main(void)
{
//DDRs
DDRD&=~((1<<PIND2)|(1<<PIND3)|(1<<PIND4)|(1<<PIND5)|(1<<PIND6)|(1<<PIND7));//input
PORTD|=(1<<PORTD2)|(1<<PORTD3)|(1<<PORTD4)|(1<<PORTD5)|(1<<PORTD6)|(1<<PORTD7);//pull-up resistors
DDRC|=(1<<PORTC0)|(1<<PORTC1)|(1<<PORTC2)|(1<<PORTC3)|(1<<PORTC4)|(1<<PORTC5);//output
//PCINTERRUPT
PCICR|=(1<<PCIE2);
PCMSK2|=(1<<PCINT18)|(1<<PCINT19)|(1<<PCINT20)|(1<<PCINT21)|(1<<PCINT22)|(1<<PCINT23);
//TIMER
TCCR0A|=(1<<WGM01);
TIMSK0|=(1<<OCIE0A);
OCR0A=15;//((clockfrequency/prescaler)*time)-1 - 1millisecond
TCCR0B|=(1<<CS02)|(1<<CS00);
sei();
volatile uint8_t counter=0;
volatile uint16_t check=0;
while(1)
{
switch (currentstate)//FORM HERE
{
case checkled://TO HERE every variable is reset to ZERO
if(flagchanged!=0)
{
if(light==twenty)//led intesita
{
PORTC&=~(1<<PORTC0);
PORTC&=~(1<<PORTC1);
}
else if(light==fourty)
{
PORTC|=(1<<PORTC0);
PORTC&=~(1<<PORTC1);
}
else if(light==sixty)
{
PORTC&=~(1<<PORTC0);
PORTC|=(1<<PORTC1);
}
else if(light==eighty)
{
PORTC|=(1<<PORTC0);
PORTC|=(1<<PORTC1);
}
if(time==twoseconds)//led time
{
PORTC&=~(1<<PORTC2);
PORTC&=~(1<<PORTC3);
}
else if(time==fourseconds)
{
PORTC|=(1<<PORTC2);
PORTC&=~(1<<PORTC3);
}
else if(time==eightseconds)
{
PORTC&=~(1<<PORTC2);
PORTC|=(1<<PORTC3);
}
else if(time==sixteenseconds)
{
PORTC|=(1<<PORTC2);
PORTC|=(1<<PORTC3);
}
flagchanged=0;
}
break;
case heatingup:
if(tick<=3000)
{
if(tick!=oldtick)
{
oldtick=tick;
if((tick%500)==0)//duty cycle al 50%
PORTC^=(1<<PORTC5);
if((tick%5)==0)//5% duty cycle
{
if(counter<=94)//per il 95% del periodo sta spento
{
PORTC&=~(1<<PORTC4);
}
else if(counter>=95 && counter<=101)//per il 5% del periodo sta acceso
{
if(counter==101)
{
PORTC&=~(1<<PORTC4);
counter=0;
}
else
PORTC|=(1<<PORTC4);
}
counter++;
}
}
}
else
{
currentstate=exposure;
counter=0;
tick=0;
PORTC|=(1<<PORTC5);
//checking time of how much the lamp needs to be light up
switch (time)
{
case twoseconds:
check=2000;
break;
case fourseconds:
check=4000;
break;
case eightseconds:
check=8000;
break;
case sixteenseconds:
check=16000;
break;
}
}
break;
case exposure:
if(tick<=check)
{
switch (light)//Checking duty cycle
{
case twenty://20% duty cycle
if(tick!=oldtick)
{
if((tick%20)==0)
{
if(counter<=4)//80% off
{
PORTC&=~(1<<PORTC4);
}
else if(counter>=5 && counter<=6)//20% on
{
if(counter==6)
{
PORTC&=~(1<<PORTC4);
counter=0;
}
else
PORTC|=(1<<PORTC4);
}
counter++;
}
}
break;
case fourty://40% duty cycle
if(tick!=oldtick)
{
if((tick%20)==0)
{
if(counter<=3)//60% off
{
PORTC&=~(1<<PORTC4);
}
else if(counter>=4 && counter<=6)//40% on
{
if(counter==6)
{
PORTC&=~(1<<PORTC4);
counter=0;
}
else
PORTC|=(1<<PORTC4);
}
counter++;
}
}
break;
case sixty://60% duty cycle
if(tick!=oldtick)
{
if((tick%20)==0)
{
if(counter<=2)//40% off
{
PORTC&=~(1<<PORTC4);
}
else if(counter>=3 && counter<=6)//60% on
{
if(counter==6)
{
PORTC&=~(1<<PORTC4);
counter=0;
}
else
PORTC|=(1<<PORTC4);
}
counter++;
}
}
break;
case eighty://80% duty cycle
if(tick!=oldtick)
{
if((tick%20)==0)
{
if(counter<=1)//20% off
{
PORTC&=~(1<<PORTC4);
}
else if(counter>=2 && counter<=6)//80% on
{
if(counter==6)
{
PORTC&=~(1<<PORTC4);
counter=0;
}
else
PORTC|=(1<<PORTC4);
}
counter++;
}
}
break;
}
}
else
{
PORTC&=~(1<<PORTC4);
PORTC&=~(1<<PORTC5);
currentstate=checkled;
flagchanged=1;
}
break;
case stop://Emergency stop
if(tick<=2000)
{
if(tick!=oldtick)
{
oldtick=tick;
if((tick%250)==0)
PORTC|=(1<<PORTC5);
}
}
else
{
PORTC&=~(1<<PORTC5);
flagchanged=1;
currentstate=checkled;
}
break;
}
}
}
答案 0 :(得分:1)
在主代码中,已启用计时器0的输出比较中断
source = $('#list-todo').html(),
但是您没有此向量的中断处理程序(您有TIMER1_COMPA_vect-而是定时器1)。
因此,当定时器中断发生时,将由默认向量处理,该向量将控制重定向到复位向量,这将导致应用程序从一开始就启动,包括变量初始化,这将导致您所有意外的行为正在观察。
因此,解决方案很简单:要么禁用OCIE0A,要么为此中断创建处理程序。
答案 1 :(得分:0)
您正在启用Timer / Counter0比较匹配A中断与下面的行
TIMSK0|=(1<<OCIE0A);
但是,您正在尝试使用以下部分中的Timer / Counter1的“比较中断ISR”。
ISR(TIMER1_COMPA_vect)
{
tick++;
}
建议的修改
通过如下修改定时器初始化并保持ISR不变,即可启用Timer / Counter1比较匹配A中断:
`TIMSK1 | =(1 <
OR
保持Timer / Counter0比较匹配不变,如下进行中断初始化并修改ISR,以在中断时调用Timer / Counter0的ISR。
ISR(TIMER0_COMPA_vect)
{
tick++;
}
希望这会有所帮助。