Posted on March 18, 2014 at 23:03Thank you for your reply. I get an error that appears in my code
..\main.c(89): error: #20: identifier ''TIM_TimeBaseInitStructure'' is undefined
..\main.c(100): error: #268: declaration may not appear after executable statement in block
this is my code
/**
******************************************************************************
* @file IO_Toggle/main.c
* @author MCD Application Team
* @version V1.0.0
* @date 19-September-2011
* @brief Main program body
******************************************************************************
* @attention
*
* 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>© COPYRIGHT 2011 STMicroelectronics</center></h2>
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include ''stm32f4_discovery.h''
/** @addtogroup STM32F4_Discovery_Peripheral_Examples
* @{
*/
/** @addtogroup IO_Toggle
* @{
*/
/* Private typedef -----------------------------------------------------------*/
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_ICInitTypeDef TIM_ICInitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
void Timer3_config(void);
void Delay_us(uint16_t us);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* GPIOD Periph clock enable */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
/* Configure PD12, PD13, PD14 and PD15 in output pushpull mode */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13| GPIO_Pin_14| GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOD, &GPIO_InitStructure);
Timer3_config();
while (1)
{
GPIO_SetBits(GPIOD, GPIO_Pin_15);
/* Insert delay */
Delay_us(5000);
GPIO_ResetBits(GPIOD, GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15);
/* Insert delay */
Delay_us(1000);;
}
}
/*------------------------------------------------------------------------------
Delay function
delays number of tick Systicks (happens every 10 ms)
*------------------------------------------------------------------------------*/
void Timer3_config(void)
{
TIM_TimeBaseInitStructure.TIM_Period = 0xFFFF; // MAksimalus delay'us yra 65535 us.
TIM_TimeBaseInitStructure.TIM_Prescaler = 72-1; // Padalina clocko 72Mhz is 72. Vadinasi 1 clocko tick'as yra 1us
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseInitStructure );
TIM_Cmd(TIM3, ENABLE);
}
void Delay_us(uint16_t us)
{
TIM_SetCounter(TIM3, 0x00);
uint16_t start = TIM_GetCounter(TIM3);
while((TIM_GetCounter(TIM3) - start) < us);
}
