/********************** (C) COPYRIGHT 1393 ------------------ ******************
* File Name : main.c
* Author : -----------
* Date First Issued : 92/09/09 : Version 1.0
* Description : Main program body
********************************************************************************
* History:
* Ver Who Date Changes
* ------ -------- -------- --------------------------------------------------
* 1.0 -------- 92/09/09 First release
********************************************************************************
* A very simple example that blinks the on-board LED.
*******************************************************************************/
/*---------------------------- Include Files ---------------------------------*/
#include "STM32F4xx.h" /* STM32F4xx.h definitions */
/*--------------------------- Type Definitions -------------------------------*/
/*------------------------- Constant Definitions -----------------------------*/
const uint16_t LEDS = GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
const uint16_t LED[4] = {GPIO_Pin_12, GPIO_Pin_13, GPIO_Pin_14, GPIO_Pin_15};
/*---------------- Macros (Inline Functions) Definitions ---------------------*/
/*------------------------- Variable Definitions -----------------------------*/
/*------------------------- Function Prototypes ------------------------------*/
static void Delay(u32 nCount);
/*--------------------------- Private Functions ------------------------------*/
/*******************************************************************************
* Function Name : main
* Description : Main program
* Input : None
* Output : None
* Return : None
*******************************************************************************/
int main()
{
/* Setup System --------------------------------------------------------------*/
/* xxxx Configuration --------------------------------------------------------*/
GPIO_InitTypeDef GPIO_InitStruct;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
GPIO_StructInit(&GPIO_InitStruct); // Output push-pull (reset state)
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz; // Fast speed
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT; // GPIO Output Mode
GPIO_InitStruct.GPIO_Pin = LEDS;
GPIO_Init(GPIOD, &GPIO_InitStruct);
GPIO_SetBits(GPIOD, LEDS);
/* ---------------------------------------------------------------------------*/
while(1)
{
static uint32_t counter = 0;
++counter;
GPIO_ResetBits(GPIOD, LEDS);
GPIO_SetBits(GPIOD, LED[counter % 4]);
Delay(100*3360);
}
}
/*******************************************************************************
* Function Name : Delay
* Description : Inserts a delay time.
* Input : nCount: specifies the delay time length.
* Output : None
* Return : None
*******************************************************************************/
static void Delay(u32 nCount)
{
u32 j = 0;
for(j = nCount; j != 0; j--);
}
/******************* (C) COPYRIGHT 1393 ------------------ *****END OF FILE****/
