Question
Output pin cannot be changed Timer10 PWM.
Posted on February 15, 2012 at 13:50
Hi I have trying to use TIM10_PWMOutput examples from STM32F2xx Standard Peripherals Firmware Library. It works very well but if I try to using the other output pin than GPIO_Pin_6 the output is quit.
The Port Pin 6 is works well but Pin 3 is quit. I have also trying to using only Pin 3 but it doesn't work. Could anybody help me, please? I'm using the STM3220G-EVAL evaluation board and I have also tried this example with our own board but it is same case, doesn't work. What I have missed or understand wrong?/**
******************************************************************************
* @file TIM/TIM10_PWMOutput/main.c
* @author MCD Application Team
* @version V1.0.0
* @date 18-April-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</
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>
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include ''stm32f2xx.h''
/** @addtogroup STM32F2xx_StdPeriph_Examples
* @{
*/
/** @addtogroup TIM10_PWMOutput
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define TIMER TIM10
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
uint16_t CCR1_Val = 233;
uint16_t PrescalerValue = 0;
uint16_t TimerPeriod = 0;
uint16_t Channel1Pulse = 0, Channel2Pulse = 0, Channel3Pulse = 0, Channel4Pulse = 0;
/* Private function prototypes -----------------------------------------------*/
void TIM_Config(void);
/* Private functions ---------------------------------------------------------*/
void Delay(__IO uint32_t nCount)
{
while(nCount--)
{
}
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f2xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f2xx.c file
*/
/* TIM Configuration */
TIM_Config();
//test();
/* -----------------------------------------------------------------------
TIM10 Configuration: generate 1 PWM signal:
The TIM10CLK frequency is set to SystemCoreClock (Hz), to get TIM10 counter
clock at 20 MHz the Prescaler is computed as following:
- Prescaler = (TIM10CLK / TIM10 counter clock) - 1
SystemCoreClock is set to 120 MHz for STM32F2xx devices
The TIM10 is running at 30 KHz: TIM10 Frequency = TIM10 counter clock /(ARR + 1)
= 20 MHz / 666 = 30 KHz
TIM10 Channel1 duty cycle = (TIM10_CCR1/ TIM10_ARR)* 100 = 50%
----------------------------------------------------------------------- */
/* Compute the prescaler value */
PrescalerValue = (uint16_t) (SystemCoreClock / 20000000) - 1;
/* Time base configuration */
TIM_TimeBaseStructure.TIM_Period = 665;
TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIMER, &TIM_TimeBaseStructure);
/* PWM1 Mode configuration: Channel1 */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = CCR1_Val;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(TIMER, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIMER, TIM_OCPreload_Enable);
/* PWM1 Mode configuration: Channel2 */
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = CCR1_Val + 80;
TIM_OC2Init(TIMER, &TIM_OCInitStructure);
TIM_OC2PreloadConfig(TIMER, TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(TIMER, ENABLE);
/* TIM10 enable counter */
TIM_Cmd(TIMER, ENABLE);
while (1)
{
TIM_SetCompare1(TIMER, CCR1_Val+200);
Delay(0x1234);
TIM_SetCompare1(TIMER, CCR1_Val);
Delay(0x1234);
}
}
/**
* @brief Configure the TIM10 Ouput Channels.
* @param None
* @retval None
*/
void TIM_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* TIM10 clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM10, ENABLE);
/* GPIOF clock enable */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOF, ENABLE);
/* GPIOF Configuration: TIM10 CH1 (PF6) */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz; //GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOF, &GPIO_InitStructure);
/* Connect TIM pins to AF3 */
GPIO_PinAFConfig(GPIOF, GPIO_PinSource6, GPIO_AF_TIM10);
GPIO_PinAFConfig(GPIOF, GPIO_PinSource3, GPIO_AF_TIM10);
}
#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(uint8_t* file, uint32_t 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) */
while (1)
{}
}
#endif
/**
* @}
*/
/**
* @}
*/
/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/