I am working since some days with STM32 ( + HAL, CubeMX), because I need a Source for a PMW with variable Frequency, where f = 20..200kHz and Duty Cycle 0..100%. To realize this I started with a regular PWM with a fixed Period.
Các API cho Timer, System, Wifi, đọc ghi SPI Flash, Sleep và các Module phần cứng: GPIO, SPI, I²C, PWM, I²S với DMA. Smartconfig: Hỗ trợ cấu hình thông số Wi-Fi cho ESP8266 nhanh chóng. Sniffer API: Bắt các gói tin trong mạng không dây 2.4Ghz. SNTP API: Đồng bộ thời gian với Máy chủ thời gian.
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Frequency: 16MHz: up to 72MHz: GPIO pins: 20: 26: PWM: 7: 12: Timers: 1x 16-bit, 2x 8-bit: 3x 16-bit, 1x pwm: Peripheral: 10-bit ADC (6 channels) 1x I2C 1x SPI 1x UART USB: 2 x 12-bit, 1 μs A/D converters (7 channels) 7-channel DMA controller 3x USART 2x I2C 2x SPI CAN USB
The frequency of a PWM output directly scales with the resolution of that PWM output and the clock frequency of a microcontroller. A ATMEGA 328P has a standard clock frequency of 16 MHz, and an 8 bit PWM output requires 256 clock cycles per PWM period. This results in a maximum PWM frequency of 62.5 kHz which is pretty low.
Quote Now how do I convert the captured pulse width to pwm duty cycle to drive my hbridge If you know the frequency of the signal being sampled (the input signal) and you do know the frequency of the timer used for the sampling (you choose that in the code) then you also know the number of timer ticks between two rising edges.
Dec 16, 2020 · Configuration Wizard in PWM STM32F4 HAL interface, UART. Step-by-step process will show you install System Workbench for this example. As the result we get the new project with timer initialization function and interrupt handler it is located in a file called stm32f4xx it.c .
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This is an advance tutorial on pwm generation. We are going to output/generate a variable pwm signal with stm32f103 microcontroller. Variable pwm signal is used for controlling the speed of Dc motors and fans. It is also used in dimmers to dim and bright the light bulbs, led arrays etc. Pwm solar chargers also work…