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How is pulse width modulation used in STM32?
PWM (Pulse Width Mod) in STM32 Pulse Width Modulation is one of the important functions of timer. PWM is a technique to control analogue circuits with digital output from microcontroller. As you all know that an Analogue signal is the one whose value varies continuously with time whereas digital signals can only be either high or low.
How is duty cycle calculated in STM32 PWM mode?
STM32 PWM Duty Cycle In normal settings, assuming you’re using the timer module in PWM mode and generating PWM signal in edge-aligned mode up-counting configuration. The duty cycle percentage is controlled by changing the value of the CCRx register. And the duty cycle equals (CCRx/ARR) [%].
Which is STM32 LED dimmer operates in PWM mode?
STM32 PWM Example LED Dimmer Set up timer 2 to operate in PWM mode with the internal clock. And enable CH1 to be the PWM output channel. Set the ARR value to the maximum 65535 for example, so the frequency should be 1098Hz
How to set GPIO pins in analog mode?
Few STM32 GPIO pins can be configured in analog mode which allows the use of ADC, DAC, OPAMP, and COMP internal peripherals. To use a GPIO pin in analog mode, the following register are considered: – GPIOx_MODER to select the mode (Input, Output, Alternate, Analog) – GPIOx_ASCR to select the required function ADC, DAC, OPAMP, or COMP
What is pulse width modulation ( PWM ) used for?
Pulse-width modulation (PWM) is used for controlling the amplitude of digital signals in order to control devices and applications requiring power or electricity. This is an advanced tutorial on PWM generation. We will learn how to generate a variable PWM signal with STM32 Series (STM32F103C) microcontroller.
What can variable PWM signal be used for?
Variable PWM signal is used for controlling the speed of DC motors/Fans. It is also used in AC Light Dimmer. PWM solar chargers also work on variable PWM signal. Servo Motors angle and direction is also controlled with the PWM signal. In this tutorial, we will learn about PWM (Pulse Width Modulation) in STM32 using Servo Motor.
How many PWM pins does the stm32f103c have?
STM32F103C has 15 PWM pins and 10 ADC pins. It has 7 timers and each PWM output is provided by a channel connected to 4 timers. It has 16-bit PWM resolution, i.e 2^16. Because of this its counters and variables can be as large as 65535.