CAN

[steve3]

Posted on September 19, 2008 at 04:35

CAN

[smart]

Posted on May 17, 2011 at 12:38

see this...

http://www.st.com/mcu/forums-cat-6876-23.html

[steve3]

Posted on May 17, 2011 at 12:38

Hello all,

Has anyone got the ST sample code for the STM32F10X-12K-EVAL board working. By which I mean remapping the alt function to PD0, PD1, correcting the baud rate calculations, and with CAN_Mode=CAN_Mode_Normal, and actually receiving data on the bus?

If you have then I would greatly appreciate seeing the working code.

Regards

Steve

[steve3]

Posted on May 17, 2011 at 12:38

Yahoo, I can now TX and RX.

Problems were all in the ST sample code.

1)Baud rate calculations

2)Flash latency not set up correctly

3)AF clocks not enabled

Soon le weekend

[steve3]

Posted on May 17, 2011 at 12:38

I look again...

One problem solved, I was not enabling alt function clock, now that I do, I do not kill the bus signal when I have TX as AF_PP.

But I still do not receive

Steve

[steve3]

Posted on May 17, 2011 at 12:38

Thanks for your reply. Yes I've read that with interest, I'm doing all these things, Baud rate correction, remap pins, can clock, port D clock.

I notice that when the TX pin is set up as AF_PP it outputs a 0, which seems to silence the can bus, CAN H goes and remains high, which does not look right to me. I'm only trying to receive data, so I cna configure the pin as input pullup, then the CAN signals continue, but I get no RX.

I'm puzzeled.

Steve

[chesneje]

Posted on May 17, 2011 at 12:38

Hi,

I have the same problem. Can you send me your configuration code.

Thanks.

[jussi]

Posted on May 17, 2011 at 12:38

Hello,

Suprisingly I'm having same problem...

Is this flash latency set up relevant and if so how it's done?

I just keep wondering how ST releases this kind of example code.. :-[

-Jussi

[muhammaduzairafzal45]

Posted on December 19, 2012 at 14:53

working code of mine:

[DEAD LINK /public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/STM32%20CAN%20Filter&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B&TopicsView=https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/AllItems.aspx&currentviews=4]https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/STM32%20CAN%20Filter&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B&TopicsView=https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/AllItems.aspx&currentviews=4

Just change  CAN_InitStructure.CAN_Mode value to CAN_Mode_Normal to communicate

externally. Correct Baud rate setting is very important for CAN..small mistake in calculating it

might result in communication error.