A very simple blink problem

[optizyme]

Posted on July 06, 2009 at 00:25

A very simple blink problem

[briand.myers9]

Posted on May 17, 2011 at 13:16

Don't know if this is your problem or not, but maybe. In your main(), there is this code:

/* Enable GPIOC clock */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); You are enabling GPIOB, in spite of the comment. Perhaps you need to enable the GPIOC clock? cheers, Brian

[optizyme]

Posted on May 17, 2011 at 13:16

Dear All,

First of all i'm very new to STM32 family. (Sorry for my bothering questions) I'm just running warm-up tour on my STM32 board and trying example files in Keil. Here is a code that i am working on : /******************** (C) COPYRIGHT 2007 STMicroelectronics ******************** * File Name : main.c * Author : MCD Application Team * Version : V1.0 * Date : 10/08/2007 * Description : Main program body ******************************************************************************** * THE PRESENT SOFTWARE 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 SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. *******************************************************************************/ /* Includes ---------------*/ #include ''stm32f10x_lib.h'' /* Private typedef --------*/ /* Private define ---------*/ /* Private macro ----------*/ /* Private variables ------*/ GPIO_InitTypeDef GPIO_InitStructure; ErrorStatus HSEStartUpStatus; /* Private function prototypes -------------*/ void RCC_Configuration(void); void NVIC_Configuration(void); void Delay(vu32 nCount); /* Private functions ------*/ /******************************************************************************* * Function Name : main * Description : Main program. * Input : None * Output : None * Return : None *******************************************************************************/ int main(void) { #ifdef DEBUG debug(); #endif /* Configure the system clocks */ RCC_Configuration(); /* NVIC Configuration */ NVIC_Configuration(); /* Enable GPIOC clock */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); /* Configure PC.06, PC.07, PC.08 and PC.09 as Output push-pull */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_20MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOB, &GPIO_InitStructure); while (1) { /* Turn on led connected to PC.06 pin */ GPIO_SetBits(GPIOB, GPIO_Pin_8); /* Insert delay */ Delay(0xAFFFF); /* Turn on led connected to PC.07 and PC.08 pins */ GPIO_SetBits(GPIOB, GPIO_Pin_9 | GPIO_Pin_10); /* Turn off led connected to PC.06 pin */ GPIO_ResetBits(GPIOB, GPIO_Pin_8); /* Insert delay */ Delay(0xAFFFF); /* Turn on led connected to PC.09 pin */ GPIO_SetBits(GPIOB, GPIO_Pin_11); /* Turn off led connected to PC.07 and PC.08 pins */ GPIO_ResetBits(GPIOB, GPIO_Pin_10 | GPIO_Pin_9); /* Insert delay */ Delay(0xAFFFF); /* Turn off led connected to PC.09 pin */ GPIO_ResetBits(GPIOB, GPIO_Pin_11); } } /******************************************************************************* * 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 * 9 = 72 MHz */ RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9); /* 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 : NVIC_Configuration * Description : Configures Vector Table base location. * Input : None * Output : None * Return : None *******************************************************************************/ void NVIC_Configuration(void) { #ifdef VECT_TAB_RAM /* Set the Vector Table base location at 0x20000000 */ NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0); #else /* VECT_TAB_FLASH */ /* Set the Vector Table base location at 0x08000000 */ NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0); #endif } /******************************************************************************* * 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--); } #ifdef DEBUG /******************************************************************************* * Function Name : assert_failed * Description : Reports the name of the source file and the source line number * where the assert_param error has occurred. * Input : - file: pointer to the source file name * - line: assert_param error line source number * Output : None * Return : 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 /******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/ I'm using ETT STM32 eval board which is very similar to MCBSTM32 and i can make all MCB samples working. (Except this one) It is a very simple blink program but my leds rejects to flash. All my leds are on when i run the code. Where is the problem? Optizyme Edit : I tried to use CODE button but my message went blank?? [ This message was edited by: optizyme on 05-07-2009 23:00 ] [ This message was edited by: optizyme on 05-07-2009 23:02 ]

[optizyme]

Posted on May 17, 2011 at 13:16

Hi Brian,

Actually my code magically worked after my post! I don't know why? Thank you for your kind interest. Optizyme [ This message was edited by: optizyme on 06-07-2009 01:17 ]

[jj]

Posted on May 17, 2011 at 13:16

This smells to me like an IDE ''optimization'' issue. (set your code optimization to ''none/minimal'' while you're learning/experimenting)

Further - posted code sets one/several Led ''bits'' and next instruction clears them. You won't be able to see this. Suggest that you insert delays ''after'' each set bit - AND after each clear bit instruction. In this way you can see the Leds actuate.

[axelsaff]

Posted on November 24, 2014 at 20:00

Thanks for your help,i had a same problem and now everything is working fine after i removed the autooptimisation.