Can I use the STM32 serial bootloader from within Crossworks?

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Peter Harrison

• April 14, 2011 22:21

I have been using and Crossworks Rm for a while and I find it pretty good. I now want to make some smaller target hardware and would like to dispense with the JTAG connector. My target is the STM32 which has a built-in serial bootloader. I do not use Windows so the ST bootloader software for that platform is no good to me. I could and do use a python script to get the job done.

What would be really nice is if I could do the bootloading thing from within Crossworks exactly as I would with a JTAG adaptor.

Is this possible already? If so, can anyone point me to the solution. If not, could it me made to happen at Rowley?

 

Or did I just not look hard enough?

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  Darcy Williams

  • April 14, 2011 22:54

  You can get away with 7-8 pins and still have full JTAG.  We still use the bog-standard jtag programmers and make custom cables that convert that down to an 8 pin 1mm pitch connector.  Then you get the best of both worlds...  and we make some very small PCB's.  I guess it's either that or rewrite the bootloader for whatever OS you're using.

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  Darcy Williams

  • April 14, 2011 23:01

  Secondly, start investigating SWD.  That might be easier for you

  There is information on the Rowley site, and on the ST site (https://my.st.com/public/STe2ecommunities/mcu/Lists/ARM%20CortexM3%20STM32/AllItems.aspx)

  That will allow you to get your connector down to as few as four pins.

  1 VDD_TARGET   VDD from application
  2 SWCLK            SWD clock
  3 GND                Ground
  4 SWDIO            SWD data input/output

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  Peter Harrison

  • April 14, 2011 23:09

  I can certainly live with the four wire solution - if it can be made to work with simple hardware on a mac. Although,I also wanted to get back the JTAG pins on the target board.

  Can you ease me towards the Rowley stuff?

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  Darcy Williams

  • April 14, 2011 23:30

  Try searching for "SWD", but the standard is simply supported by Rowley, not implemented by them.  Have a look through the cortex m3 forum link I posted.

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