Posted on February 09, 2012 at 11:51
Hello,
I would like to use a timer on
Reset mode, but I have some problem :
My goal is to
never
call the timerinterrupt
until the trigger input is switching
. I want to enter in the timer interrupt only if nothing happend on the input during a defined time (a kind of timeout on the logical input activity).
My source code is below :
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
GPIO_InitTypeDef GPIO_InitStructure;
TIM_ICInitTypeDef TIM_ICInitStruct;
/* TIM3 clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
/* GPIOA clock enable */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
/* TIM3 channel 1 pin (PA.6) configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Connect TIM14 pins to AF */
GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_TIM3);
/* Time base configuration */
TIM_TimeBaseStructure.TIM_Period = 65535;
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
/* Fill the TIM_ICInitStruct with the desired parameters */
TIM_ICInitStruct.TIM_Channel = TIM_Channel_1;
TIM_ICInitStruct.TIM_ICPolarity = TIM_ICPolarity_Rising;
TIM_ICInitStruct.TIM_ICSelection = TIM_ICSelection_DirectTI;
TIM_ICInitStruct.TIM_ICPrescaler = TIM_ICPSC_DIV1;
TIM_ICInitStruct.TIM_ICFilter = 0;
TIM_ICInit(TIM3, &TIM_ICInitStruct);
/* TIM1 Input trigger configuration: External Trigger connected to TI1 */
TIM_SelectInputTrigger(TIM3, TIM_TS_TI1FP1);
TIM_SelectSlaveMode(TIM3, TIM_SlaveMode_Reset);
TIM_SelectMasterSlaveMode(TIM3, TIM_MasterSlaveMode_Enable);
/* TIM3 IT enable */
TIM_ITConfig(TIM3, TIM_IT_CC1, ENABLE);
/* TIM3 enable counter */
TIM_Cmd(TIM3, ENABLE);
If anyone can help me ...
Thomas
#timer-slave-mode-reset
