Lecture Notes: MCU cx-32v03 Presentation by Patrick

Introduction

• Presenter: Patrick
• Recently discussed by David Jones on YouTube: 10 stands restarted MCU cx-32v03
• Demonstrated blink demo: easy project start
• Video reached 200,000 views, indicating high popularity among engineers
• Many inquiries about the one wire debug protocol for this MCU

Main Topics

WCH and 10 Stands Restarted MCU cx-32v03

• WCH: Chip design company
• Self-designed IPs: This type, USB PHY IP, Ethernet PHY IP
• No need to pay for third-party royalties
• Key feature: 32-bit response for 10 stands

World’s First One Wire Debugging Protocol

• Release: Available on GitHub (open WCH)
• Downloadable from the video comments
• Key Design Tips:
  • CH32V03 debugging IO is open drain; needs pull-up
  • Recommended pull-up resistor: 10,000 ohms

Schematic Design

• Components: CH32V03, PD1, IO link
• Connections: IO to one wire PD1; IO pull-up with 10,000 ohms resistor

Software Section

• Protocol Detail: One line protocol
• Transmission Speed: Choose different modes to speed up
• Debug menu: 32 general-purpose MCU, RISC-V-based
• Block Diagram: Debug system
• Transmission Devices: USB communication

Debug Transport Toggle

• Packet format: Divided into new packet and bypass packet
  • New packet sends address
  • Bypass packet sends data
• Data Definition: Fast Mode and Normal Mode
• Low/High level timing for signal detection
  • Unit time (T) = 125 nanoseconds

Logical Signal of One Wire Protocol

• Tools needed: Logic analyzer, Vo3 board
• Process:
  • Plug link into USB hub and logic analyzer
  • Open DSView app and analyze signals
  • Identify stop bit and receive bit within the signals

Conclusion

• Contact info for questions and bulk purchases
  • Leave comments or email Patrick
  • Large volume chip purchases available with better prices and service

Thank you for attending!