STM32 MCUs Motor control

Posted on October 23, 2014 at 01:59Hello I'm using an STM32F405 based board (OpenPilot ) and i'm looking to capture 5 input PWM signals over only two Timers . For this , i have to use multiple channels of the two timers . I succeeded doing it with only one channel using the example provided with the standard library . But i could'nt adapt it to a multi channel case . Can someone explain to me how to configure the Timers and how to compute the different dutycyles . An example with more than one channel would help a lot . Thanks. #pwm-duty-cycle-computation

Posted on March 19, 2013 at 09:57 I would like to implement a three phase PWM strategy using an IHM033V1 board (with a STM32F100CB microcontroller) and a IHM027V1 power board. I use the TIM1 timer to generate the PWM signal in center aligned mode. I would like to update the CCRx registers both when the counter overflow/underflow. I implemented a Space Vector Modulation algorithm with switcing freqeuncy 4 kHz, which works fine. My problem is that, the interrupt (which calculates the duty ratios) is not generated at every overflow/underflow, only after approx 100 period (around 40 Hz). I do not know, what the problem is. Could you help me? How can I generate interrupt at each underflow/overflow of the timer? The code: #include ''stm32f10x_conf.h'' #define ARM_MATH_CM3 #define MAX_PWM 3000 #include ''arm_math.h'' void RCC_Configuration(void); void GPIO_Configuration(void); void TIM1_Configuration(void); void USART_Configuration(void); void NVI

Posted on April 16, 2012 at 23:13 Hello, I've set up a STM32 with an incremental optical two channel encoder. The counter direction bit toggles between 0 and 1 every count. As a result, the counter never gets pass 1. The counter reads 0,1,0,1,0,1... I've tried all the counter modes, polarity settings, and channel counting settings. Has anyone experienced this before? Any ideas? Thanks void ecdr_TIM2_init(void) { //Enable bus. RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); //Setting encoder inputs. GPIO_init(GPIO_Mode_AF, GPIO_OType_PP, GPIO_Speed_25MHz, GPIO_PuPd_NOPULL, Encoder_TIM2); GPIO_PinAFConfig(GPIOA, GPIO_PinSource1 | GPIO_PinSource0, GPIO_AF_TIM2); // NVIC_InitTypeDef NVIC_InitStructure; //Hold intr settings. //Enabling interrupts for Timer 5. // NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn; // NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; // NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; // NVIC_Ini