Hi,
I've set up a PWM with TIM14_CH1 on pin PB1, using standard peripherial library and this worked fine (the signal on the output-pin was just as expected).
Now I've tried to move the PWM signal from pin PB1 to PA4, still using TIM14_CH1, but with no success (the pin stays low, no pwm signal at all).
Here is the code is used (:
// PWM (Tim14)
//-------------
// GPIOx Clock enable
RCC_AHBPeriphClockCmd( RCC_AHBPeriph_GPIOB, ENABLE);
//RCC_AHBPeriphClockCmd( RCC_AHBPeriph_GPIOA, ENABLE);
// GPIOx Pin configure (as alternate function push-pull)
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
//GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource1, GPIO_AF_0);
//GPIO_Init(GPIOA, &GPIO_InitStructure);
//GPIO_PinAFConfig(GPIOA, GPIO_PinSource4, GPIO_AF_0);
// TIM14 clock enable
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM14 , ENABLE);
// calc PWM-Periode (102 kHz)
PWM_period = (SystemCoreClock / 102000 ) - 1;
// calc PWM-DutyC pulse (50% Dutycycle)
PWM_DutyC_pulse = ((PWM_period- 1) / 2);
// Time Base configure
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period = PWM_period;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM14, &TIM_TimeBaseStructure);
// Timer compare-channel 1 configure (in PWM mode)
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable;
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low;
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
TIM_OC1Init(TIM14, &TIM_OCInitStructure);
// Timer enable
TIM_Cmd(TIM14, ENABLE);
// Timer PWM output enable
TIM_CtrlPWMOutputs(TIM14, ENABLE);
// start PWM (set DutyC > 0)
TIM_SetCompare1(TIM14, PWM_DutyC_pulse);
