最近在调试编码器,用的貌似是官方给出的例程,但是在做pid的时候遇到困难,不知道该如何在此基础上实现pid,有大神指教吗?
#define ENCODER_
tiMER TIM3 // Encoder unit connected to TIM3
#define ENCODER_TIM_PERIOD (u16)32 //line of encoder
#define COUNTER_RESET (u16)0
#define ICx_FILTER (u8) 6 // 6<-> 670nsec
static volatile u16 hEncoder_Timer_Overflow;
static u8 Duty_TIM3 = 0;
extern u16 hEncoder_Timer_Overflag;
u16 rotor_speed=0;
u8 Period_TIM3 = 0,CollecFlag_TIM3;
void ENC_Init(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_ICInitTypeDef TIM_ICInitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
//TIM3 clock enable
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
//priority of TIM3
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/**
*Òý½Å¸´Óà µ½µ×ÊǸ´ÓÃģʽ
**/
GPIO_PinAFConfig(GPIOB,GPIO_PinSource4,GPIO_AF_TIM3);
GPIO_PinAFConfig(GPIOB,GPIO_PinSource5,GPIO_AF_TIM3);
/* Timer configuration in Encoder mode */
TIM_DeInit(ENCODER_TIMER);
TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
TIM_TimeBaseStructure.TIM_Prescaler = 0X00;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period = (4*ENCODER_TIM_PERIOD)-1; //ÉèÖÃPWMÖÜÆÚ
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInit(ENCODER_TIMER, &TIM_TimeBaseStructure);
//±àÂëÆ÷½Ó¿Úģʽ³õʼ»¯ ´Ëº¯Êý˵Ã÷Ö»Óж¨Ê±Æ÷µÄchanel1 and chanel2 ¾ßÓбàÂëÆ÷¹¦ÄÜ£¬ÆäËûͨµÀΪ¼¯³É±àÂëÆ÷¹¦ÄÜ
TIM_EncoderInterfaceConfig(ENCODER_TIMER, TIM_EncoderMode_TI12,TIM_ICPolarity_Rising, TIM_ICPolarity_Rising);
// TIM_ICInitStructure.TIM_Channel=TIM_Channel_2;
// TIM_ICInitStructure.TIM_ICSelection=TIM_ICSelection_DirectTI;
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
TIM_ICStructInit(&TIM_ICInitStructure);
TIM_ICInitStructure.TIM_ICFilter = ICx_FILTER;//Â˲¨Ê±¼äÈçºÎ¼ÆËãµÃÀ´£¿£¿
TIM_ICInit(ENCODER_TIMER, &TIM_ICInitStructure);
// TIM_SelectInputTrigger(ENCODER_TIMER, TIM_TS_TI2FP2); //Ñ¡ÔñʱÖÓ´¥·¢Ô´
// TIM_SelectSlaveMode(ENCODER_TIMER, TIM_SlaveMode_Reset);//´ÓģʽѡÔñ
// TIM_SelectMasterSlaveMode(ENCODER_TIMER, TIM_MasterSlaveMode_Enable); //Ö÷´ÓģʽѡÔñ
// Clear all pending interrupts
TIM_ClearFlag(ENCODER_TIMER,TIM_IT_CC1|TIM_FLAG_Update);
TIM_ITConfig(ENCODER_TIMER,TIM_IT_CC1|TIM_IT_Update, ENABLE);
//Reset counter
ENCODER_TIMER->CNT = COUNTER_RESET;
TIM_Cmd(ENCODER_TIMER, ENABLE);
}
s16 ENC_Get_Rotorspeed(void)
{
static u16 lastCount = 0;
u16 curCount = ENCODER_TIMER->CNT;//
rotor_speed=(128*hEncoder_Timer_Overflag+curCount-lastCount)/64;
printf("hEncoder_Timer_Overflag=%d
",hEncoder_Timer_Overflag);
lastCount = curCount;
return (u16) rotor_speed;
}
void TIM3_IRQHandler(void)
{
if(TIM_GetITStatus(TIM3,TIM_IT_Update)==SET) //Òç³öÖжÏ
{
TIM_ClearITPendingBit(TIM3,TIM_IT_Update); //Çå³ýÖжϱê־λ
hEncoder_Timer_Overflag++;
}
else if(TIM_GetITStatus(TIM3,TIM_IT_CC1)==SET)
{
Duty_TIM3=TIM_GetCapture1(TIM3);
if(TIM_GetCapture2(TIM3)>64)
Period_TIM3=TIM_GetCapture2(TIM3);
CollecFlag_TIM3=0;
}
}
采用的是中断溢出的方式进行速度计算的,关于中断服务函数是参考资料写的,但是实现PID好像还有不少的问题、阿莫西
论坛
哪位能帮我把阿莫西论坛的源码下载下来。小弟谢谢了先。源码可以发生到俅俅:605172128
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