Bosses, I made a stepper motor driver, the original pulse terminal PB4 pin output PWM wave (F1) can turn after good, I'll take direction terminals (PC7 output high and low level control), the result is no reaction, here the delay parameter is also changed a few have no reaction, always turn, later I'll setbits resetbits remove found that the motor can stop normally, rotation is possible, don't know what is problem, why do I add change level two statements even regardless of the delay of ah... It even setbit and resetbite regardless of the time delay function can certainly play a role of ah, wiring is PUL + connect 5 v PUL - by PB4 DIR + 5 v DIR - pick PC7

////here is PWM and pin initializing and setup section
# include "PWM_OUT. H"

Void TIM3_GPIO_Config (void)
{
GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB1PeriphClockCmd (RCC_APB1Periph_TIM3, ENABLE);

RCC_APB2PeriphClockCmd (RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOB, ENABLE);

GPIO_PinRemapConfig (GPIO_Remap_SWJ_JTAGDisable, ENABLE);//turn off the JTAG, would use the PB4, none can't drive motor
GPIO_PinRemapConfig (GPIO_PartialRemap_TIM3, ENABLE);

GPIO_InitStructure. GPIO_Pin=GPIO_Pin_4;//PWM output pin
GPIO_InitStructure. GPIO_Mode=GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init (GPIOB, & amp; GPIO_InitStructure);


GPIO_InitStructure. GPIO_Pin=GPIO_Pin_7;//v output pin
GPIO_InitStructure. GPIO_Mode=GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init (GPIOC, & amp; GPIO_InitStructure);
}



Void TIM3_PWM_Init (void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;


Under-16 CCR1_Val=250;//duty ratio 50%


/* -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
TIM3 Configuration: generate four PWM signals with the four company's duty cycles:
TIM3CLK=72 MHz, Prescaler=0 x0, TIM3 counter clock=72 MHz
TIM3 ARR Register=999=& gt; TIM3 clock Frequency=TIM3 counter/(ARR + 1)
TIM3 Frequency=72 KHz.
TIM3 Channel1 duty cycle=(TIM3_CCR1/TIM3_ARR) * 50%=100
TIM3 Channel2 duty cycle=(TIM3_CCR2/TIM3_ARR) * 37.5%=100
TIM3 Channel3 duty cycle=(TIM3_CCR3/TIM3_ARR) * 25%=100
TIM3 we duty cycle=(TIM3_CCR4/TIM3_ARR) * 12.5%=100
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - */


TIM_TimeBaseStructure. TIM_Prescaler=17;

TIM_TimeBaseStructure. TIM_ClockDivision=TIM_CKD_DIV1;

TIM_TimeBaseStructure. TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseInit (TIM3, & amp; TIM_TimeBaseStructure);


TIM_OCInitStructure. TIM_OCMode=TIM_OCMode_PWM1;
TIM_OCInitStructure. TIM_OutputState=TIM_OutputState_Enable;

TIM_OCInitStructure. TIM_Pulse=CCR1_Val;

TIM_OCInitStructure. TIM_OCPolarity=TIM_OCPolarity_High;

TIM_OC1Init (TIM3, & amp; TIM_OCInitStructure);
TIM_OC1PreloadConfig (TIM3, TIM_OCPreload_Enable);


TIM_ARRPreloadConfig (TIM3, ENABLE);


TIM_Cmd (TIM3, ENABLE);
}


//////the following is the main function

Int main (void)
{

LED_GPIO_Config ();
TIM3_GPIO_Config ();
TIM3_PWM_Init ();
While (1)
{
TIM_Cmd (TIM3, DISABLE);
GPIO_ResetBits (GPIOC, GPIO_Pin_7);
Delay (0 XFFFF);
TIM_Cmd (TIM3, ENABLE);
Delay (0 XFFFFFFF);

TIM_Cmd (TIM3, DISABLE);
GPIO_SetBits (GPIOC, GPIO_Pin_7);
Delay (0 XFFFF);
TIM_Cmd (TIM3, ENABLE);
Delay (0 XFFFFFFF);
}
}

CodePudding user response:

PWM channel 1, I can delete the other 2, 3, 4