element14 Community
element14 Community
    Register Log In
  • Site
  • Search
  • Log In Register
  • 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
  • About Us
  • 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
STMicroelectronics
  • Products
  • Manufacturers
  • STMicroelectronics
  • More
  • Cancel
STMicroelectronics
Forum Is This Situation Repairable
  • Blog
  • Forum
  • Documents
  • Events
  • Polls
  • Members
  • Mentions
  • Sub-Groups
  • Tags
  • More
  • Cancel
  • New
Join STMicroelectronics to participate - click to join for free!
Actions
  • Share
  • More
  • Cancel
Forum Thread Details
  • State Suggested Answer
  • Replies 21 replies
  • Answers 17 answers
  • Subscribers 14 subscribers
  • Views 3687 views
  • Users 0 members are here
  • dso_15001k
Related

Is This Situation Repairable

jw0752
jw0752 over 8 years ago

A while back I posted a blog about building a DSO Shell 15001K Oscilloscope Kit.

 

https://www.element14.com/community/people/jw0752/blog/2017/04/25/building-the-dso-shell-15001k-oscilloscope

 

I gave one of these kits to an old friend and he called me a few days later to say that the preliminary test of the Main Board which is done before one starts assembly showed it to be failed We tried a number of diagnostics over the phone and finally I had him send the board to me My tests revealed that there was a low resistance short on the 3.3 volt rail I traced the circuit and removed smd components and cut traces to try to isolate the branch of the 3.3 volt circuit and the component that might be causing the problem Ultimately the fault was in the  STM32F103C8T6STM32F103C8T6 microprocessor I removed the microprocessor and decided that the unit was going to be just parts While I can technically replace the uP I have no way to reprogram it As I studied the schematic I noticed that there was in addition to the uP an 8 pin 24LC32A EPROM tied to the SOA and SCL pins of the uP Here is a link to the main board schematic

 

http://www.jyetech.com/Products/LcdScope/Schematic_150main.pdf

 

My question is whether there is a possibility that the program for the unit is on the EPROM and not on the uP. Would I be able to replace the fried uP with a raw one and expect it to automatically boot up from the EPROM.  At this point it is all just a learning experience but I will probably not waste my money on a uP or my time replacing it if it is impossible for the program to be on the EPROM.

 

Any insights will be appreciated.

 

John

 

  • Sign in to reply
  • Cancel

Top Replies

  • jw0752
    jw0752 over 8 years ago +8 suggested
    Hi mcb1 Jan Cumps , , gecoz , I want to thank each of you for your awesome response to my question. Based on what you have told me I am sure it will not be as easy as just replacing the uP but your insights…
  • jw0752
    jw0752 over 8 years ago +7
    This is just an update. The STM 32 microprocessor arrived today and I installed it on the board as well as all the parts I had removed to trace the original short. The chip comes with a pre-installed bootloader…
  • mcb1
    mcb1 over 8 years ago +5 suggested
    Does it still have the short. These EEprom do have a supply, and it would be very close to the uP, so it's possible. They usually are a memory for the processor. It will contain some data that is read…
Parents
  • gecoz
    0 gecoz over 8 years ago

    Hi John,

    I don't know this unit, but looking at the datasheet, the uP has 64KB flash memory, while the EEPROM has only 32Kbit (4KB), so my bet would be for the firmware to be stored on the uP, with the EEPROM storing the signal samples. If this is the case, I'll have to echo what Mark already said: the device will not boot if you simply replace the uP without preloading it with the firmware. If you got some time in your hands, as proof, you can still try dumping the content of the EEPROM via the I2C interface, and see if there is any meaningful data. This Application Note  from MicroChip gives some information on how to interface a 8051 uP with the memory, which I believe can be easily adapted to any uP. If you have an Arduino board, this Add I2C EEPROM to Arduino gives a nice introduction on how to interface the EEPROM (it uses an 24LC256 chip,but I believe it still applies to the whole of 24LCXX family, so the info can be useful even for different setup).

    Fabio.

     

    P.S: JyeTech does provide a way to upgrade the firmware for the device, perhaps it can be also used to flash a new uP. It is worth tring to contact them and ask if that could work.

    • Cancel
    • Vote Up +4 Vote Down
    • Sign in to reply
    • Verify Answer
    • Reject Answer
    • Cancel
  • Jan Cumps
    0 Jan Cumps over 8 years ago in reply to gecoz

    Fabio Origlia wrote:

     

    ...

     

    P.S: JyeTech does provide a way to upgrade the firmware for the device, perhaps it can be also used to flash a new uP. It is worth tring to contact them and ask if that could work.

    It requires a bootloader. It won't work with a fresh µP

    • Cancel
    • Vote Up +3 Vote Down
    • Sign in to reply
    • Verify Answer
    • Reject Answer
    • Cancel
Reply
  • Jan Cumps
    0 Jan Cumps over 8 years ago in reply to gecoz

    Fabio Origlia wrote:

     

    ...

     

    P.S: JyeTech does provide a way to upgrade the firmware for the device, perhaps it can be also used to flash a new uP. It is worth tring to contact them and ask if that could work.

    It requires a bootloader. It won't work with a fresh µP

    • Cancel
    • Vote Up +3 Vote Down
    • Sign in to reply
    • Verify Answer
    • Reject Answer
    • Cancel
Children
  • gecoz
    0 gecoz over 8 years ago in reply to Jan Cumps

    Jan Cumps wrote:

    ...

    It requires a bootloader. It won't work with a fresh µP

    From the Jye Tech Firmware Update documentation (the link provided in my original reply):

    The micro-controller (STM32F103C8T6) used in DSO SHELL contains a built-in booloader. This is a

    small piece of firmware that can communicate with PC via serial port to write firmware into the flash

    ROM inside the chip. This article describes how to setup the connection and how to perform firmware

    upgrade step by step.

    The fresh uP already comes with a bootloader, so in principle, if Jye Tech didn't replace it with a proprietary one, it is possible to flash a fresh uP using the tools and the procedure described in the doc. This is why I think contacting them could remove all the guesswork.

    Fabio.

    • Cancel
    • Vote Up +5 Vote Down
    • Sign in to reply
    • Verify Answer
    • Reject Answer
    • 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