【STM32 core board】STM32_CoreBoard_V2

Overview

• This STM32 core board is the improved second version. It is equipped with an OLED display module, SWD debugging interface, three custom buttons and a reset button. It is very simple (and good-looking).
• For specific content and detailed usage attachments, please refer to the previous version:

https://oshwhub.com/ZSTU-EDC-5th/zhe-jiang-li-gong-dian-sai-stm32f103rct6?sharesource=qzone

Version change

1. The miniUSB interface and CH340 chip have been cut off, and the programming method is replaced by SWD, and SWD supports online debugging.
2. The board area is further reduced, making it more mini, and it feels great to hold in one palm.
3. The OLED module has been improved from supporting 4 pins to supporting 4 or 7 pins. Note: Regardless of pin 4 or pin 7, the protocol is I2C. Most of the 7-pin OLEDs on the market support multiple protocols. How to change from SPI to I2C mode, please refer to the information sent by the Taobao store! In the attachment, I will send you information about the OLED I bought. It is recommended to buy a four-pin OLED directly! Because the seven-pin OLEDs produced by different manufacturers may still have differences in level logic if they change the I2C protocol.
4. BOOT0 and BOOT1 have been lead out, and the level can be changed with a jumper cap.

Small TIPS

It was a bit careless and anxious, and the SWD and BOOT are not clearly marked. The SWD interfaces from top to bottom are SWCLK, SWDIO, GND, and 5V0. BOOT left is GND and right is 3V3. Thank you very much to the good brothers who provided valuable opinions on the previous edition! People have a good experience using this version, but my level is limited, so I still hope to get criticism and opinions. I hope that the majority of netizens will give me some advice!