Subversion Repositories – MLAB

(root)/Modules/ARM/STM32F10xRxT/SW/LED_blink/LED_Blink_Main.c @ 2124

Rev 2067

#include "stm32f10x_it.h"


GPIO_InitTypeDef GPIO_InitStructure;
ErrorStatus HSEStartUpStatus;


void RCC_Configuration(void);
void Delay(vu32 nCount);



void SystemInit()
{

  /* Configure the system clocks */
  RCC_Configuration();

  /* NVIC Configuration */
//  NVIC_Configuration();

  /* Enable GPIOC clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

  /* Configure PC.4 as Output push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* Configure PC.4 as Output push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

}


int main(void)
{
        while (1)
        {
        GPIO_SetBits(GPIOC, GPIO_Pin_5);
        GPIO_ResetBits(GPIOC, GPIO_Pin_4);
        GPIO_SetBits(GPIOB, GPIO_Pin_7);
        GPIO_ResetBits(GPIOB, GPIO_Pin_8);
        Delay(0x1fFFFF);

        GPIO_SetBits(GPIOC, GPIO_Pin_4);
        GPIO_ResetBits(GPIOC, GPIO_Pin_5);
        GPIO_SetBits(GPIOB, GPIO_Pin_8);
        GPIO_ResetBits(GPIOB, GPIO_Pin_7);
        Delay(0x1fFFFF);
        }
}

/*******************************************************************************
* Function Name  : RCC_Configuration
* Description    : Configures the different system clocks.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void RCC_Configuration(void)
{
  /* RCC system reset(for debug purpose) */
  RCC_DeInit();

  /* Enable HSE */
  RCC_HSEConfig(RCC_HSE_ON);

  /* Wait till HSE is ready */
  HSEStartUpStatus = RCC_WaitForHSEStartUp();

  if(HSEStartUpStatus == SUCCESS)
  {
    /* Enable Prefetch Buffer */
//    FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

    /* Flash 2 wait state */
//    FLASH_SetLatency(FLASH_Latency_2);

    /* HCLK = SYSCLK */
    RCC_HCLKConfig(RCC_SYSCLK_Div1);

    /* PCLK2 = HCLK */
    RCC_PCLK2Config(RCC_HCLK_Div1);

    /* PCLK1 = HCLK/2 */
    RCC_PCLK1Config(RCC_HCLK_Div2);

    /* PLLCLK = 8MHz * 4 = 32 MHz */
    RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_2);

    /* Enable PLL */
    RCC_PLLCmd(ENABLE);

    /* Wait till PLL is ready */
    while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
    {
    }

    /* Select PLL as system clock source */
    RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

    /* Wait till PLL is used as system clock source */
    while(RCC_GetSYSCLKSource() != 0x08)
    {
    }
  }
}



/*******************************************************************************
* Function Name  : Delay
* Description    : Inserts a delay time.
* Input          : nCount: specifies the delay time length.
* Output         : None
* Return         : None
*******************************************************************************/
void Delay(vu32 nCount)
{
  for(; nCount != 0; nCount--);
}