/taxi_v1.2/Project/Examples/TIM/OnePulse/main.c

/**

  ******************************************************************************

  * @file TIM/OnePulse/main.c 

  * @author  MCD Application Team

  * @version  V3.0.0

  * @date  04/06/2009

  * @brief  Main program body

  ******************************************************************************

  * @copy

  *

  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS

  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE

  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY

  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING

  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE

  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.

  *

  * <h2><center>&copy; COPYRIGHT 2009 STMicroelectronics</center></h2>

  */ 



/* Includes ------------------------------------------------------------------*/

#include "stm32f10x.h"



/** @addtogroup StdPeriph_Examples

  * @{

  */



/** @addtogroup TIM_OnePulse

  * @{

  */ 



/* Private typedef -----------------------------------------------------------*/

/* Private define ------------------------------------------------------------*/

/* Private macro -------------------------------------------------------------*/

/* Private variables ---------------------------------------------------------*/

TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;

TIM_ICInitTypeDef  TIM_ICInitStructure;

TIM_OCInitTypeDef  TIM_OCInitStructure;



/* Private function prototypes -----------------------------------------------*/

void RCC_Configuration(void);

void GPIO_Configuration(void);



/* Private functions ---------------------------------------------------------*/



/**

  * @brief  Main program

  * @param  None

  * @retval : None

  */

int main(void)

{

  /* System Clocks Configuration */

  RCC_Configuration();



  /* Configure the GPIO ports */

  GPIO_Configuration();



  /* TIM2 configuration: One Pulse mode ------------------------

     The external signal is connected to TIM2_CH2 pin (PA.01), 

     The Rising edge is used as active edge,

     The One Pulse signal is output on TIM2_CH1 pin (PA.00)

     The TIM_Pulse defines the delay value 

     The (TIM_Period -  TIM_Pulse) defines the One Pulse value.

     The TIM2CLK is fixed to 72 MHz, the Prescaler is 1, so the 

     TIM2 counter clock is 36 MHz. 

     The Autoreload value is 65535 (TIM2->ARR), so the maximum 

     frequency value to trigger the TIM2 input is 500 Hz.

     The TIM_Pulse defines the delay value, the delay value is fixed 

     to 455.08 us:

     delay =  CCR1/TIM2 counter clock = 455.08 us. 

     The (TIM_Period - TIM_Pulse) defines the One Pulse value, 

     the pulse value is fixed to 1.365ms:

     One Pulse value = (TIM_Period - TIM_Pulse)/TIM2 counter clock = 1.365 ms.

  ------------------------------------------------------------ */



  /* Time base configuration */

  TIM_TimeBaseStructure.TIM_Period = 65535;

  TIM_TimeBaseStructure.TIM_Prescaler = 1;

  TIM_TimeBaseStructure.TIM_ClockDivision = 0;

  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;



  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);



  /* TIM2 PWM2 Mode configuration: Channel1 */

  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;

  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

  TIM_OCInitStructure.TIM_Pulse = 16383;

  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;



  TIM_OC1Init(TIM2, &TIM_OCInitStructure);



  /* TIM2 configuration in Input Capture Mode */



  TIM_ICStructInit(&TIM_ICInitStructure);



  TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;

  TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;

  TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;

  TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;

  TIM_ICInitStructure.TIM_ICFilter = 0;



  TIM_ICInit(TIM2, &TIM_ICInitStructure);



  /* One Pulse Mode selection */

  TIM_SelectOnePulseMode(TIM2, TIM_OPMode_Single);



  /* Input Trigger selection */

  TIM_SelectInputTrigger(TIM2, TIM_TS_TI2FP2);



  /* Slave Mode selection: Trigger Mode */

  TIM_SelectSlaveMode(TIM2, TIM_SlaveMode_Trigger);



  while (1)

  {}

}



/**

  * @brief  Configures the different system clocks.

  * @param  None

  * @retval : None

  */

void RCC_Configuration(void)

{

  /* Setup the microcontroller system. Initialize the Embedded Flash Interface,  

     initialize the PLL and update the SystemFrequency variable. */

  SystemInit();



  /* TIM2 clock enable */

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);



  /* GPIOA clock enable */

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

}



/**

  * @brief  Configure the GPIOD Pins.

  * @param  None

  * @retval : None

  */

void GPIO_Configuration(void)

{

  GPIO_InitTypeDef GPIO_InitStructure;



  /* TIM2_CH1 pin (PA.00) configuration */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;



  GPIO_Init(GPIOA, &GPIO_InitStructure);



  /* TIM2_CH2 pin (PA.01) configuration */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;



  GPIO_Init(GPIOA, &GPIO_InitStructure);

}



#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) */



  while (1)

  {}

}

#endif



/**

  * @}

  */ 



/**

  * @}

  */ 



/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/