STM32F4 Discovery

Libraries and tutorials for STM32F4 series MCUs by Tilen Majerle

Tagged: frequency

PWM graph 47

STM32F4 / STM32F4 Discovery / STM32F429 / STM32F429 Discovery

Library 48- Measure PWM input signal with STM32F4

First library in 2015 is here. With it, you will be able to measure PWM input signal from “other world”. STM32F4’s timers have capability to make an interrupt on edge, when signal is active on input pin for specific timer. This allows us, to measure signal in input. With a simple calculations, we can detect frequency of signal and duty cycle. Of course, this is not veery accurate, but with 168MHz F407 device, using 32bit TIM2 (high resolution) I got...

Library 40- Output clocks from STM32F4 14

STM32F4 / STM32F4 Discovery / STM32F429 / STM32F429 Discovery

Library 40- Output clocks from STM32F4

STM32F4 has capability to output different clocks on specific 2 pins. You are able to output clocks in original frequency (no prescaler) and also with prescaler values 2, 3, 4 and 5. 2 pins are used to output different frequencies. They are not able to output the same clocks. You can output: MCO1 HSI: High Speed Internal oscillator, 16MHz RC HSE: High Speed External oscillator, or External User clock LSE: Low speed, 32768Hz oscillator or ceramic resonator PLLCLK: Output clock...

All STM32F4 libraries 128

STM32F4 / STM32F4 Discovery / STM32F429 / STM32F429 Discovery

All STM32F4 libraries

Because there is a lot of libraries I have done, I will make a table with all of my libraries at one place. When new library will be created, it will be posted here. These libraries work on both Discovery boards, if not, it will be specified. Actually, libraries should work on STM32F4xx series of microcontrollers if they have peripherals that are need for library. All STM32F4xx MCUs don’t have everything inside. 🙂 Libraries are tested on my 4 STM32F4...

DS1307 I2C RTC Clock on STM32F4 33

STM32F4 / STM32F4 Discovery / STM32F429 / STM32F429 Discovery

Library 15- DS1307 Real Time Clock for STM32F4

In my 15th library, I will show you, how to operate with DS1307 Real Time Clock I2C module from maxim integrated. The DS1307 serial real-time clock (RTC) is a lowpower, full binary-coded decimal (BCD) clock/calendar plus 56 bytes f NV SRAM. Address and data are transferred serially through an I2C, bidirectional bus. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in...