gistfile1.txt

/**
  ******************************************************************************
  * @file    Project/main.c 
  * @author  MCD Application Team
  * @version V2.3.0
  * @date    16-June-2017
  * @brief   Main program body
   ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing, software 
  * distributed under the License is distributed on an "AS IS" BASIS, 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************************
  */ 


/* Includes ------------------------------------------------------------------*/
#include "stdio.h"
#include "stm8s.h"
#include "stm8s_gpio.h"
#include "stm8s_uart2.h"

/* Private defines -----------------------------------------------------------*/


#define LED_GPIO_PORT  (GPIOE)
#define LED_GPIO_PINS  (GPIO_PIN_5)
/* Private function prototypes -----------------------------------------------*/
static void TIM1_Config(void);
static void UART_Config(void);
/* Private functions ---------------------------------------------------------*/


uint32_t TIM1ClockFreq = 2000000;
__IO uint32_t LSIClockFreq = 0;
uint16_t ICValue1 = 0, ICValue2 = 0;

void Delay(uint32_t nCount)
{
  /* Decrement nCount value */
  while (nCount != 0)
  {
    nCount--;
  }
}

void main(void)
{
	
	int i = 0;
    uint8_t freq_string[12] = {0};
	
	/* Initialize I/Os in Output Mode */
    GPIO_Init(LED_GPIO_PORT, (GPIO_Pin_TypeDef)LED_GPIO_PINS, GPIO_MODE_OUT_PP_LOW_FAST);
	
    GPIO_Init(GPIOD, GPIO_PIN_0, GPIO_MODE_OUT_PP_LOW_FAST);
    //CLK_LSICmd(ENABLE);
	CLK_CCOConfig(CLK_OUTPUT_LSI);
    CLK_CCOCmd(ENABLE);
    //while(CLK_GetFlagStatus(CLK_FLAG_CCORDY) == FALSE);
	
	UART_Config();
    

    LSIClockFreq = (8 * TIM1ClockFreq) / (ICValue2 - ICValue1);
    
    
    sprintf(freq_string, "%u", LSIClockFreq);
    /* Infinite loop */
    while (1)
    {
		GPIO_WriteReverse(LED_GPIO_PORT, (GPIO_Pin_TypeDef)LED_GPIO_PINS);
		
		Delay(0xFFFF);
		
		for(i = 0; i < 12; i++)
		{
			UART2_SendData8(freq_string[i]);
			Delay(60);
		}
		
		
    }
  
}


/**
  * @brief  Configure TIM1 to to capture the internal clock source (LSI)
  * @param  None
  * @retval None
  */
static void TIM1_Config(void)
{
  TIM1_ICInit( TIM1_CHANNEL_1, TIM1_ICPOLARITY_FALLING, TIM1_ICSELECTION_DIRECTTI,
               TIM1_ICPSC_DIV8, 0x0);
  
  /* Enable TIM1 */
  TIM1_Cmd(ENABLE);

  /* Clear CC1 Flag*/
  TIM1_ClearFlag(TIM1_FLAG_CC1);
  
  /* wait a capture on CC1 */  // CC1IF
  while((TIM1->SR1 & TIM1_FLAG_CC1) != TIM1_FLAG_CC1);
  /* Get CCR1 value*/
  ICValue1 = TIM1_GetCapture1();
  TIM1_ClearFlag(TIM1_FLAG_CC1);
  
  /* wait a capture on cc1 */
  while((TIM1->SR1 & TIM1_FLAG_CC1) != TIM1_FLAG_CC1);
  /* Get CCR1 value*/
  ICValue2 = TIM1_GetCapture1();
  TIM1_ClearFlag(TIM1_FLAG_CC1);
}

#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(u8* file, u32 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


static void UART_Config(void){
    //Reset uart
    UART2_DeInit();
    UART2_Init((uint32_t)9600, UART2_WORDLENGTH_8D, UART2_STOPBITS_1, UART2_PARITY_NO, UART2_SYNCMODE_CLOCK_DISABLE, UART2_MODE_TXRX_ENABLE );
}


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