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minute (mntmn@mastodon.social)'s status on Thursday, 12-Oct-2023 20:16:53 JST minute

what's the best JTAG interface for debugging ARMv8 cores that works with open source tooling? (needs to be 1.8V compatible)

In conversation about a year ago from mastodon.social permalink
- minute (mntmn@mastodon.social)'s status on Thursday, 12-Oct-2023 20:35:43 JST minute
  in reply to
  - Felix B. Ohmann
  @fb oh thanks, this looks very good
  
  In conversation about a year ago permalink
- Felix B. Ohmann (fb@abraum.social)'s status on Thursday, 12-Oct-2023 20:35:45 JST Felix B. Ohmann
  in reply to
  
  @mntmn i recently bought this one: https://www.olimex.com/Products/ARM/JTAG/ARM-USB-OCD-H/, the HL version for wider voltage range to be precise. i also added the extra swd adapter to have all options. it works with openocd, which iirc does armv8.
  In conversation about a year ago permalink
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  1. Invalid filename.
    
    ARM-USB-OCD-H
    
    from Olimex
    
    High-speed 3-IN-1 fast USB ARM JTAG, USB-to-RS232 virtual port and power supply 5VDC device (supported by OpenOCD arm debugger)
- minute (mntmn@mastodon.social)'s status on Thursday, 12-Oct-2023 20:41:29 JST minute
  in reply to
  - Felix B. Ohmann
  @fb yep, put it in the cart as well!
  
  In conversation about a year ago permalink
- Felix B. Ohmann (fb@abraum.social)'s status on Thursday, 12-Oct-2023 20:41:30 JST Felix B. Ohmann
  in reply to
  
  @mntmn also getting the small pitch jtag adapter might be a good idea. i have had only good experiences with olimex stuff in the past.
  
  In conversation about a year ago permalink
- minute (mntmn@mastodon.social)'s status on Thursday, 12-Oct-2023 23:41:02 JST minute
  in reply to
  - Mykola
  @trixie oh, you have experience with ls1028a?
  
  In conversation about a year ago permalink
- Mykola (trixie@graphics.social)'s status on Thursday, 12-Oct-2023 23:41:03 JST Mykola
  in reply to
  
  @mntmn https://1bitsquared.com/products/tigard works reasonably well for me (for ls1028a with openocd too). For whatever reason I was unable to get stlink-v3 minie to work with imx or ls AXX cores, it is targeted towards Cortex-Mx based chips.
  In conversation about a year ago permalink
  Attachments
  1. Tigard Protocol Tool
    
    Tigard is an open source FT2232H-based, multi-protocol, multi-voltage tool for hardware hacking. By incorporating commonly used pin-outs, a labelled wiring harness, onboard level-shifting, and a logic analyzer connection, it is designed specifically for attaching to and communicating with low-speed interfaces on reverse-engineered hardware targets. It pairs very well with the BitMagic Basic Logic Analyzer. You can connect the BitMagic to Tigard through the built in Logic Analyzer port on the Tigard. Features & Specifications USB Type C high-speed (480 Mbps) interface FTDI FT2232HQ Dual High Speed USB to Multipurpose UART/FIFO IC Primary port dedicated to UART including access to all flow control signals Secondary port shared among dedicated headers for SWD, JTAG, SPI, and I²C High-performance directional level-shifters for 1.8 to 5.5 V operation Switch to choose between on-board 1.8 V, 3.3 V, 5.0 V, and off-board vTarget supplies Switch to choose between SPI/JTAG and I²C/SWD modes Logic analyzer (LA) port to observe device-level signals Indicator lights to aid debugging Software Support In general, Tigard was designed to work as-is with several tools and libraries that already support the x232H family of chips. This includes: USB-Serial drivers for UART access OpenOCD and UrJTAG for JTAG Flashrom, PyFtdi/PySpiFlash, LibMPSSE, and other tools for SPI interfaces LibMPSSE and PyFtdi/PyI2CFlash for I²C interfaces Thanks to the drop-in compatibility with so many tools, there is no need for Tigard-specific tools to interface with any targets. If you do find the need to customize a tool or script using Tigard, it should work fine with any other FT2232H interface board. Example Use Cases Attach to the serial console you find on a home automation device Dump the contents of a SPI flash chip inside of a set top box Use GDB over the JTAG pins to modify code in memory, allowing you to bypass a login prompt you're connected to over the UART pins on a kid's toy you've taken apart Use I²C to interact with an OLED display, while concurrently observing the transactions with a BitMagic logic analyzer over the LA port
- minute (mntmn@mastodon.social)'s status on Friday, 13-Oct-2023 03:12:08 JST minute
  in reply to
  - Mykola
  @trixie do you by any chance know if jtag access would work before hreset goes up?
  
  In conversation about a year ago permalink
- Mykola (trixie@graphics.social)'s status on Friday, 13-Oct-2023 03:12:09 JST Mykola
  in reply to
  
  @mntmn not something I can brag about 😅, it didn't reached the point of custom board bringup.
  
  In conversation about a year ago permalink
- minute (mntmn@mastodon.social)'s status on Friday, 13-Oct-2023 08:10:01 JST minute
  in reply to
  @esden @xabean @dragonmux cool, thanks for the info!
  
  In conversation about a year ago permalink
- Piotr Esden-Tempski (esden@chaos.social)'s status on Friday, 13-Oct-2023 08:10:02 JST Piotr Esden-Tempski
  in reply to
  - Richard "mtfnpy" Harman
  - Rachel Mant
  @xabean In this particular case it depends on what @mntmn needs specifically. Assuming it is for the ls1028a, we don't currently have 64bit support _YET_ and Cortex-A/R needs more love. @dragonmux is currently actively working on the latter (Cortex-A/R), and we do have plans to add the former (64bit). So at the very moment it does indeed make more sense to use some generic JTAG debugger supported by OpenOCD. :( (BMP is great for all things ARM Cortex-M including the ARMv8: Cortex-M23,-M33. :) )
  
  In conversation about a year ago permalink
- Richard "mtfnpy" Harman (xabean@infosec.exchange)'s status on Friday, 13-Oct-2023 08:10:03 JST Richard "mtfnpy" Harman
  in reply to
  - Piotr Esden-Tempski
  @mntmn https://1bitsquared.com/ has the black magic probe which I don't have but there's an active community and I've heard great things about it. /cc @esden
  In conversation about a year ago permalink
  Attachments
  1. Your source for open source embedded hardware tools.
    
    1BitSquared is developing and manufacturing electronics to support the open source embedded electronics community and provide users and developers with versatile tools.

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