STM32F103C8T6OLEDOscilloscope

STM32F103C8T6 OLED dual channel oscilloscope with Pulse Generator, DDS Function Generator

This displays an oscilloscope screen on a 128x64 OLED. The settings are controled by the 5 direction switch. It contains Pulse Generator, DDS Function Generator.

Specifications:

Dual input channel

Input voltage range 0 to 3.3V

12 bit ADC 5.14 Msps single channel, 2.57 Msps dual channel

timebase magnification x2, x5 and x10 applying sin(x)/x interpolation

Measures minimum, maximum and average values

Measures frequency and duty cycle

Spectrum FFT analysis

Sampling rate selection

Built in Pulse Generator

Built in DDS Function Generator

Develop environment is:
Arduino IDE 1.8.19
STM32F1xx/GD32F1xx boards by stm32duino version 2022.9.26
(additional URL: http://dan.drown.org/stm32duino/package_STM32duino_index.json )
CPU speed 72MHz

Libraries:
Adafruit_SSD1306
Adafruit_SH110X
arduinoFFT by Enrique Condes 2.0.0

Schematics:

Description is here, although it is written in Japanese language: http://harahore.g2.xrea.com/STM32/STM32OLEDOscillo.html