200929 STM32F103 - PWM (TIM4_CH2)

 

개발환경) System workbench

 

// PortD
#define PIN_WIPER_PWM_IN GPIO_Pin_13 // PD13

void InitGPIO(void)
{
	GPIO_InitTypeDef GPIO_InitStructure;
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE);
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_InitStructure.GPIO_Pin = PIN_Z_CLK_CNT | PIN_UNWIND_PWM_IN1 | PIN_UNWIND_PWM_IN2 | PIN_WIPER_PWM_IN ;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP ;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOD, &GPIO_InitStructure);
}


void InitTimer_Pwm(void) 
{ //TIMER4
	/* TIM4 clock enable */
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);

	/* Time base configuration */
	TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure_TIM4;
	TIM_TimeBaseStructure_TIM4.TIM_ClockDivision = TIM_CKD_DIV1;
	TIM_TimeBaseStructure_TIM4.TIM_Prescaler = 3-1;	// 72Mhz / 3 = 24Mhz
	TIM_TimeBaseStructure_TIM4.TIM_Period = 1000-1;	// 24Mhz / 1000 = 24Khz (PWM 주기는 24Khz)
	TIM_TimeBaseStructure_TIM4.TIM_CounterMode = TIM_CounterMode_Up;
	TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure_TIM4);

	/* PWM1 Mode configuration */
	TIM_OCInitTypeDef TIM_OCInitStructure_WIPER;
	TIM_OCInitStructure_WIPER.TIM_OCMode = TIM_OCMode_PWM1;
	TIM_OCInitStructure_WIPER.TIM_OCPolarity = TIM_OCPolarity_High;
	TIM_OCInitStructure_WIPER.TIM_OutputState = TIM_OutputState_Enable;
	TIM_OCInitStructure_WIPER.TIM_Pulse = (int)(nFanDuty * 10); // Duty 설정. nFanDuty (0 ~ 100)
	TIM_OC2Init(TIM4, &TIM_OCInitStructure_WIPER);
	TIM_OC2PreloadConfig(TIM4, TIM_OCPreload_Enable);
	TIM_Cmd(TIM4, ENABLE);
}

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