/*
 * F4xx_Delay.h
 *
 *  Created on: 31 янв. 2018 г.
 *      Author: Home
 */

#ifndef F4XX_DELAY_H_
#define F4XX_DELAY_H_

#include <F4xx_DWT.h>

// задержка в микросекундах
void Delay_us(__IO uint32_t tDelay);

// задержка в милисекундах
void Delay_ms(__IO uint32_t tDelay);

#endif /* F4XX_DELAY_H_ */

/*
 * F4xx_Delay.c
 *
 *  Created on: 31 янв. 2018 г.
 *      Author: Home
 */

#include <F4xx_Delay.h>


// задержка в микросекундах
void Delay_us(__IO uint32_t tDelay)
{
  DWT->CYCCNT = 0;
  tDelay = tDelay * (SYS_CLK /1000000);
  while (DWT->CYCCNT < tDelay);
}

// задержка в милисекундах
void Delay_ms(__IO uint32_t tDelay)
{
  DWT->CYCCNT = 0;
  tDelay = tDelay * (SYS_CLK /1000);
  while (DWT->CYCCNT < tDelay);
}

/*
 * main.h
 *
 *  Created on: 31 янв. 2018 г.
 *      Author: Home
 */

#ifndef MAIN_H_
#define MAIN_H_

#include "stm32f4xx.h"

// системная частота в герцах
#define  SYS_CLK           16000000

#endif /* MAIN_H_ */

/*
 * F4xx_DWT.h
 *
 *  Created on: 31 янв. 2018 г.
 *      Author: Home
 */

#ifndef F4XX_DWT_H_
#define F4XX_DWT_H_

#include <main.h>

void DWT_CYC_Counter_Enable(void);

#endif /* F4XX_DWT_H_ */

/*
 * F4xx_DWT.c
 *
 *  Created on: 31 янв. 2018 г.
 *      Author: Home
 */

#include <F4xx_DWT.h>

void DWT_CYC_Counter_Enable(void)
{
  /* запускаем таймер DWT_CYC */
  CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
  DWT->CYCCNT = 0;
  DWT->CTRL |= DWT_CTRL_CYCCNTENA_Msk;
}

/*
******************************************************************************
File:     main.c
Info:     Generated by Atollic TrueSTUDIO(R) 9.0.0   2018-01-31

The MIT License (MIT)
Copyright (c) 2018 STMicroelectronics

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

******************************************************************************
*/

/* Includes */
#include "main.h"
#include <F4xx_DWT.h>
#include <F4xx_Delay.h>

/* Private macro */

// гасим все светодиоды
#define  LED_CLR_ALL             GPIOD->BSRR = GPIO_BSRR_BR_12 | GPIO_BSRR_BR_13 | GPIO_BSRR_BR_14 | GPIO_BSRR_BR_15
// включаем соотв.светодиод
#define  LED1_SET                GPIOD->BSRR = GPIO_BSRR_BS_12
#define  LED2_SET                GPIOD->BSRR = GPIO_BSRR_BS_13
#define  LED3_SET                GPIOD->BSRR = GPIO_BSRR_BS_14
#define  LED4_SET                GPIOD->BSRR = GPIO_BSRR_BS_15
#define  DELAY_INIT_CNT          500000

// тестовая нога для анализатора
#define  TST_CLR                 GPIOD->BSRR = GPIO_BSRR_BR_0
#define  TST_SET                 GPIOD->BSRR = GPIO_BSRR_BS_0

/* Private variables */
/* Private function prototypes */
/* Private functions */
void RCC_Init(void);
void GPIO_Init(void);
void Delay(__IO uint32_t tDelay);



void RCC_Init(void)
{
  RCC->AHB1ENR = RCC_AHB1ENR_GPIODEN;  // включаем тактирование GPIOD
}

void GPIO_Init(void)
{
  GPIOD->MODER = GPIO_MODER_MODER0_0 | GPIO_MODER_MODER12_0 | GPIO_MODER_MODER13_0 | GPIO_MODER_MODER14_0 | GPIO_MODER_MODER15_0;  // настраиваем PD12, PD13, PD14, PD15 как "двухтактный выход общего назначения"
}

// блокирующая задержка
void Delay(__IO uint32_t tDelay)
{
  while(tDelay--);
}

int main(void)
{
uint32_t a;

  RCC_Init();
  GPIO_Init();
  DWT_CYC_Counter_Enable();

  while(1)
  {
   LED_CLR_ALL;
   LED1_SET;
   Delay_ms(500);

   LED_CLR_ALL;
   LED2_SET;
   Delay_us(500000);

   LED_CLR_ALL;
   LED3_SET;
   Delay_ms(500);

   LED_CLR_ALL;
   LED4_SET;
   Delay_us(500000);
  }
}