pastebinpastebin

/**
  ******************************************************************************
  * @file    GPIO/GPIO_Toggle/main.c
  * @author  P. Szulim
  * @version V1.0.0
  * @date    10-Listopad-2015
  * @brief   Program changes periodicaly brightnes of LED lighting
  ******************************************************************************
  *
  ******************************************************************************
  */


/* Header files -------------------------------------------------------------------*/
#include "stm32f30x.h"
#include "stm32f30x_gpio.h"
#include "stm32f30x_rcc.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
void Delay(void);
/* Private functions ---------------------------------------------------------*/

/**
  * @brief  Main program.
  * @param  None
  * @retval None
  */
int main(void)
{
	/* Configuration structure definition */
  GPIO_InitTypeDef GPIO_InitStructure;
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
  TIM_OCInitTypeDef  TIM_OCInitStructure;

 /* GPIOE Periph clock enable */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOE, ENABLE);

  /* Alternative configuration for pin PE9 */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9|GPIO_Pin_11|GPIO_Pin_13|GPIO_Pin_14;
	/* alternative mode for pin */
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;
  GPIO_Init(GPIOE, &GPIO_InitStructure);

	/* Alternative function for pin - TIM1 take control of this pin */
  /* For more information go to the DS */
  GPIO_PinAFConfig(GPIOE, GPIO_PinSource9, GPIO_AF_2);
	GPIO_PinAFConfig(GPIOE, GPIO_PinSource11, GPIO_AF_2);
	GPIO_PinAFConfig(GPIOE, GPIO_PinSource13, GPIO_AF_2);
	GPIO_PinAFConfig(GPIOE, GPIO_PinSource14, GPIO_AF_2);
	/************* Timer configuration ******************/

	/* TIM1 clock activation */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1 , ENABLE);

	/* Main counter activation */
  TIM_TimeBaseStructure.TIM_Prescaler = 720; //720 means, that clock signal will be divided 720 times.
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //counter count up
  TIM_TimeBaseStructure.TIM_Period = 1000; //counter count from 0 to 1000
  TIM_TimeBaseStructure.TIM_ClockDivision = 0; //additional clock divider disabled
  TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; //additional mode disabled
  /* Initialisation of timer */
	TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

	/* Timer channel struct initiation */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //PWM mode for this channel
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //channel act on external pin
  TIM_OCInitStructure.TIM_Pulse = 0; //PWM duty equal 0%.
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //additional function
  TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;//additional function
  /* Configure channel 1 */
  TIM_OC1Init(TIM1, &TIM_OCInitStructure);
	/* Run timer*/
	TIM_Cmd(TIM1, ENABLE);
	/* activate channel output */
	TIM_CtrlPWMOutputs(TIM1, ENABLE);

  /* program changes led brightnes  */
  while (1){
		/* set PWM on 10% (100/1000)*/
		TIM_SetCompare1(TIM1,100);
		Delay();
		/* set PWM duty on 20% */
		TIM_SetCompare1(TIM1,200);
		Delay();
		/* set PWM duty on 30% */
		TIM_SetCompare1(TIM1,300);
		Delay();
		/* set PWM duty on 40% */
		TIM_SetCompare1(TIM1,400);
		Delay();
		/* set PWM duty on 50% */
		TIM_SetCompare1(TIM1,500);
		Delay();
		/* set PWM duty on 60% */
		TIM_SetCompare1(TIM1,600);
		Delay();
		/* set PWM duty on 70% */
		TIM_SetCompare1(TIM1,700);
		Delay();
		/* set PWM duty on 80% */
		TIM_SetCompare1(TIM1,800);
		Delay();
		/* set PWM duty on 90% */
		TIM_SetCompare1(TIM1,900);
		Delay();
		/* set PWM duty on 100% - direct acces to CCR register */
		TIM1->CCR1=1000;
		Delay();
  }
}



/**
  * @brief  Delay function.
  * @param  None
  * @retval None
  */
void Delay(void){
	int i;
	for(i=0;i<0x7FFFF;i++);
}



#ifdef  USE_FULL_ASSERT

/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t* file, uint32_t line)
{
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  /* Infinite loop */
  while (1)
  {
  }
}
#endif