STM32-Oscilloscope

STM32 Digital Oscilloscope using the STM32F103C8 MCU and the ILI9341 2.4 inch TFT display.

Specifications:

• One input channel
• 2.57 Msps ADC, accepting signal frequencies up to 1.28 MHz
• Calculates minimum, maximum and average values
• Spectrum FFT analysis
• Fundamental frequency detection
• SD card export of signal wave shape and spectrum
• Freeze function
• Sampling rate selection

Fork modifications:

• ILI9341 on SPI
• Removed SD card code
• Removed buttons and replaced with single encoder

Wiring:

#define TFT_DC      PA0
#define TFT_CS      PA1
#define TFT_RST     PA2
#define TFT_LED     PA3 // Backlight

#define ENC_BUTTON PB7
#define ENC_CLK PB8
#define ENC_DATA PB9

#define TEST_SIGNAL PA8
#define CHANNEL_1 PB0

Original post: https://www.gameinstance.com/post/80/STM32-Oscilloscope-with-FFT-and-SD-export