element14 Community
element14 Community
    Register Log In
  • Site
  • Search
  • Log In Register
  • About Us
  • Community Hub
    Community Hub
    • What's New on element14
    • Feedback and Support
    • Benefits of Membership
    • Personal Blogs
    • Members Area
    • Achievement Levels
  • Learn
    Learn
    • Ask an Expert
    • eBooks
    • element14 presents
    • Learning Center
    • Tech Spotlight
    • STEM Academy
    • Webinars, Training and Events
    • Learning Groups
  • Technologies
    Technologies
    • 3D Printing
    • FPGA
    • Industrial Automation
    • Internet of Things
    • Power & Energy
    • Sensors
    • Technology Groups
  • Challenges & Projects
    Challenges & Projects
    • Design Challenges
    • element14 presents Projects
    • Project14
    • Arduino Projects
    • Raspberry Pi Projects
    • Project Groups
  • Products
    Products
    • Arduino
    • Avnet Boards Community
    • Dev Tools
    • Manufacturers
    • Multicomp Pro
    • Product Groups
    • Raspberry Pi
    • RoadTests & Reviews
  • Store
    Store
    • Visit Your Store
    • Choose another store...
      • Europe
      •  Austria (German)
      •  Belgium (Dutch, French)
      •  Bulgaria (Bulgarian)
      •  Czech Republic (Czech)
      •  Denmark (Danish)
      •  Estonia (Estonian)
      •  Finland (Finnish)
      •  France (French)
      •  Germany (German)
      •  Hungary (Hungarian)
      •  Ireland
      •  Israel
      •  Italy (Italian)
      •  Latvia (Latvian)
      •  
      •  Lithuania (Lithuanian)
      •  Netherlands (Dutch)
      •  Norway (Norwegian)
      •  Poland (Polish)
      •  Portugal (Portuguese)
      •  Romania (Romanian)
      •  Russia (Russian)
      •  Slovakia (Slovak)
      •  Slovenia (Slovenian)
      •  Spain (Spanish)
      •  Sweden (Swedish)
      •  Switzerland(German, French)
      •  Turkey (Turkish)
      •  United Kingdom
      • Asia Pacific
      •  Australia
      •  China
      •  Hong Kong
      •  India
      •  Korea (Korean)
      •  Malaysia
      •  New Zealand
      •  Philippines
      •  Singapore
      •  Taiwan
      •  Thailand (Thai)
      • Americas
      •  Brazil (Portuguese)
      •  Canada
      •  Mexico (Spanish)
      •  United States
      Can't find the country/region you're looking for? Visit our export site or find a local distributor.
  • Translate
  • Profile
  • Settings
Experimenting with Gesture Sensors
  • Challenges & Projects
  • Design Challenges
  • Experimenting with Gesture Sensors
  • More
  • Cancel
Experimenting with Gesture Sensors
Forum Establishing serial communication over UART instead of USB in MAX25405 EVKIT
  • Challenge Blog
  • Forum
  • Documents
  • Files
  • Members
  • Mentions
  • Sub-Groups
  • Tags
  • More
  • Cancel
  • New
Join Experimenting with Gesture Sensors to participate - click to join for free!
Actions
  • Share
  • More
  • Cancel
Forum Thread Details
  • Replies 89 replies
  • Subscribers 41 subscribers
  • Views 10304 views
  • Users 0 members are here
  • MAX25405
  • gesture sensors
  • maxim integrated
  • uart
  • max32620fthr
Related

Establishing serial communication over UART instead of USB in MAX25405 EVKIT

rsjawale24
rsjawale24 over 2 years ago

The MAX25405EVKIT comes with a MAX32620FTHR board which is preprogrammed with custom binary file for the gesture recognition. The application note at Maxim Gesture Sensor EVKit Serial API (maximintegrated.com)

mentions "The serial interface can be implemented over the Universal Serial Bus (USB) virtual serial port or over a Universal Asynchronous Receiver-Transmitter (UART). The EV kit is shipped configured to use the USB serial port to work with the EV kit PC Graphical user Interface (GUI). If a UART serial interface is desired, custom firmware in binary format is available."

Upon researching more, I found the firmware_framework code that contains the code for gesture recognition compiled using mbed compiler.

The readme file says that a file called interface.h and interface.c define the communication protocol. When I open the interface.c file, I can see a comment in the code that says Option to implement serial API over UART instead of USB but there is only a MACRO set as #define macro_name 0 

I tried to change the 0 to 1 and compile the code, however, it does not compile successfully. The USBDevice library shows some error while compiling. 

Did anyone try to change the serial API over UART instead of USB? Was it successful?  

EDIT: I have successfully compiled the code for UART. However, I'll do some experiments and write introductory blogs before I re-program the MAX32620FTHR board with my firmware. 

  • Sign in to reply
  • Cancel

Top Replies

  • misaz
    misaz over 2 years ago in reply to misaz +4
    Today I found root cause of the issue. Issue is caused by invalid assembly code generated by modern ARM compiler. With older GCC compiler it works because it handle undefined behaviour used in code differently…
  • misaz
    misaz over 2 years ago +3
    I am curious how did you successfully compiled non-changed code? I started working with latest mbed-os but I was unable to compile it (missing toolchain) no matter of USE_UART_INTERFACE setting. Later…
  • BigG
    BigG over 2 years ago in reply to rsjawale24 +3
    I've create a very basic stripped down library based on the firmware framework using the latest MbedOS 6.16. github.com/.../Max25x05_MbedOS6 All it is doing is getting the raw pixel data. It is doing…
Parents
  • rsjawale24
    rsjawale24 over 2 years ago

    So I'm facing another problem now.

    As long as I send commands like ver and ping, it works fine. But as soon as I send poll command, I get results and then it gets stuck there. It does not respond to any commands. Not sure why this is happening.

    • Cancel
    • Vote Up 0 Vote Down
    • Sign in to reply
    • Cancel
  • misaz
    misaz over 2 years ago in reply to rsjawale24

    I also noticed this behaviour. I had not very much time, so following information about source code and my theory may be inaccurate. After brief look to code I did not find anything which should cause crash of firmware. Executing poll command only printf some data from global variables if I understand it correctly. But I remember that readme.txt contained some notices of extending main stack nad poll printf is quite a complicated (memory usage extensive). Maybe our firmware was not compiled and configured properly and printf with many format strings make some memory overflow which destroys stack and causes firmware to crash. I will try to debug it this week and find some fix.

    • Cancel
    • Vote Up 0 Vote Down
    • Sign in to reply
    • Cancel
Reply
  • misaz
    misaz over 2 years ago in reply to rsjawale24

    I also noticed this behaviour. I had not very much time, so following information about source code and my theory may be inaccurate. After brief look to code I did not find anything which should cause crash of firmware. Executing poll command only printf some data from global variables if I understand it correctly. But I remember that readme.txt contained some notices of extending main stack nad poll printf is quite a complicated (memory usage extensive). Maybe our firmware was not compiled and configured properly and printf with many format strings make some memory overflow which destroys stack and causes firmware to crash. I will try to debug it this week and find some fix.

    • Cancel
    • Vote Up 0 Vote Down
    • Sign in to reply
    • Cancel
Children
  • rsjawale24
    rsjawale24 over 2 years ago in reply to misaz

    Thanks! I looked into it. The poll command is giving only 0's as output so maybe something is wrong. I will try looking into in tonight. 

    • Cancel
    • Vote Up 0 Vote Down
    • Sign in to reply
    • Cancel
element14 Community

element14 is the first online community specifically for engineers. Connect with your peers and get expert answers to your questions.

  • Members
  • Learn
  • Technologies
  • Challenges & Projects
  • Products
  • Store
  • About Us
  • Feedback & Support
  • FAQs
  • Terms of Use
  • Privacy Policy
  • Legal and Copyright Notices
  • Sitemap
  • Cookies

An Avnet Company © 2025 Premier Farnell Limited. All Rights Reserved.

Premier Farnell Ltd, registered in England and Wales (no 00876412), registered office: Farnell House, Forge Lane, Leeds LS12 2NE.

ICP 备案号 10220084.

Follow element14

  • X
  • Facebook
  • linkedin
  • YouTube