bateman
Member
The solution turned out to be that, as well as remapping PB8 and PB9 using the CAN_REMAP field of the AFIO_MAPR register, I had to use the MODE9/CNF9 fields in the GPIOB_CRH register to configure pin PB9 to be an alternate function output (push-pull) with 50MHz max. speed.
Of course, before I'd realised that I'd desoldered the MCP2551 transceiver from my Olimexino and plugged a hacked-together external transceiver into the headers. Oh well, at least I'm unstuck now! :)
stumo
Member
At least you know a lot more about the hardware than I do.
And to answer your question (which you already answered yourself)... yes I have been running the Olimexino connected to several road cars for about 5 months now. They have been running without any issue and I'm quite impressed (for such a cheap board). I'm just masking for a couple of frames off the bus and doing stuff with the values, so I'm not putting any data onto the bus (yet). Just sniffing for the data I'm working with.
iainism
Member
Hi Terentius,
Are you on Windows and are you using the Maple or a clone, such as the Olimexino-STM32?
Are you using an Olimex JTAG interface?
PLEASE NOTE: I have only done the following with an Olimexino-STM32, I have not tried or tested it with a 'true' Maple (for one thing I don't have access to one...)!
If you have an Olimex JTAG then the Olimex Eclipse distribution is a "one-stop-shop" to getting set up under MS Windows to use OpenOCD, Yagarto and the Zylin CDT (albeit with some slightly older versions than are presently available): http://www.olimex.com/dev/openocd/
(If you have a non-Olimex JTAG then YMMV - but the distribution does a lot of set-up work for you and so should at least be helpful in getting you up and running)
The Olimex Eclipse distro comes with a "blinky" example code. Once you have this set-up I explained recently in a blog post how to set up the Maple Bootloader in Eclipse (under Windows): http://iainism-blogism.blogspot.co.uk/2012/04/booting-up.html
I'm new to the Maple/Olimexino-STM32 myself, so I can't offer much more help than the above.
Edit: Clarified that I was asking if an Olimex JTAG was being used.
bateman
Member
I've recently managed to obtain one of the elusive ARM-JTAG-20-10 leads from ebay, so I can finally connect my JTAG adaptor (an ARM-USB-TINY-H) to my Olimexino-STM32.
Putting the toolchain together by downloading up-to-date software packages didn't quite work... The JTAG and OpenOCD end worked fine (I could telnet into OpenOCD and run commands with absolute reliability); running GDB from the commandline on top of OpenOCD also worked perfectly.
At the other end Eclipse (Indigo) could build code using the YAGARTO toolchain with no problems, but trying to use the whole stack together didn't work. I strongly suspect that the Zylin CDT adaptor is out of date compared to one or other of the software components.
In the end I downloaded Olimex's tools distribution and that worked perfectly, with the only deviation from the instructions being that I had to put absolute pathnames to GDB and so on in the external programs and debug configurations. The versions of the packages supplied are slightly out of date, but the end result is an IDE that works very well indeed - and it's a lot nicer than most of the commercial IDEs I've used.
@stumo: I'll order another Olimexino-STM32 and test it using the same code I've got working with my external transceiver. Cheap CAN nodes with a decent amount of processing power in them and lots of other handy features are just too useful to ignore!
iainism
Member
"I've recently managed to obtain one of the elusive ARM-JTAG-20-10 leads from ebay, so I can finally connect my JTAG adaptor (an ARM-USB-TINY-H) to my Olimexino-STM32."
I got mine from Mouser (a few weeks ago) I'm sure that they had quite a few in stock at the time (maybe not as cheap as ebay though!)
Not understand what you discuss. Then i need CAN for car communiation i work 1 week and make it (with all changes in maple) - now i not use maple (because it for professionals like yours) - beginners like me use code without any discussions. what's a problem to use as sample ST examples and implement as you want. Only i tune SJW, BS1,BS2 for car 500Kbit speed and happy.
Terentius
Member
bateman: And is your CAN working in maple IDE? Because I can't still make it work. I've tried it in maple with no success. Than I tried it in eclipse, but I don't have no experience to work in eclipse and to set it up (in Linux)... So for now I'm trying to finish it in maple IDE, but for now without success. If someone have working library for maple IDE, I appreciate it's sharing :-)
bateman
Member
Hmmm... I did start work on my CAN code under the Maple IDE, but at some point I got the right adaptor cable for my JTAG and moved over to using the Yagarto build of GCC, OpenOCD, Eclipse, etc etc. There's nothing special in my CAN code - it's all built around lots of volatile u32*'s pointing to the registers in the bxCAN controller registers, RCC registers, etc etc - it doesn't depend on wirish or libmaple or anything.
I publish my old library for HardwareCAN (Maple 0.0.12).
http://akb77.com/g/stm32/maplehardwarecan/
just found this thread.
been doing CANbus using 56F803 for years.
Just got a Maple and Olimexino so working on Modifying a class with added ifdef on STM32F1 an STM32F4.
I will be testing it against the CAN and LIN I have running currently.
I have read a couple of threads about close loop and a pin staying low.
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