4965 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:02:07 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=802&page=7#post-105788 Wed, 28 Oct 2015 07:47:23 +0000 Phono 105788@http://forums.leaflabs.com/ <p>Hi, thanks a lot. Did you fix the issue with the declarations required in the core, but that make the inclusion of the HardwareCAN library mandatory? </p> http://forums.leaflabs.com/topic.php?id=802&page=7#post-105783 Mon, 19 Oct 2015 10:08:57 +0000 vagran 105783@http://forums.leaflabs.com/ <p>Hi,<br /> I have recently faced the necessarity to use CAN bus on Olimexino-STM32. After reading all this topic I have forked libmaple repository on GitHub and added CAN bus support using library code posted here. The repository is here: <a href="https://github.com/vagran/libmaple-olimexino-canbus" rel="nofollow">https://github.com/vagran/libmaple-olimexino-canbus</a><br /> Data reading example in "examples/olimexino-can.cpp". Tested with DJI multicopters on-board CAN bus. </p> http://forums.leaflabs.com/topic.php?id=802&page=7#post-105614 Fri, 09 Jan 2015 16:22:08 +0000 Phono 105614@http://forums.leaflabs.com/ <p>Hi,<br /> I have the same concern, and i read the source code of the library. I found this :</p> <p>-in HardwareCan.cpp (the classes exposed to the programmer)<br /> CAN_STATUS HardwareCAN::filter(uint8 idx, uint32 id, uint32 mask)<br /> {<br /> return can_filter(Port, idx, CAN_FIFO0, CAN_FILTER_32BIT, CAN_FILTER_MASK, 0, 0);<br /> }</p> <p>-in CAN.C<br /> CAN_STATUS can_filter(CAN_Port* CANx, uint8 filter_idx, CAN_FIFO fifo, CAN_FILTER_SCALE scale, CAN_FILTER_MODE mode, uint32 fr1, uint32 fr2)</p> <p>Apparently, the function filter calls the function can_filter, and forces various parameters, including the MASK mode. However, I am wondering why the parameters fr1 (the identifier) and fr2 (the mask) are ignored, and replaced by 0, 0.<br /> I do not think that the filter function can be useful anyhow.<br /> W893, would this be a mistake? Wouldn't it be correct to change the function filter as follows :</p> <p>CAN_STATUS HardwareCAN::filter(uint8 idx, uint32 id, uint32 mask)<br /> {<br /> return can_filter(Port, idx, CAN_FIFO0, CAN_FILTER_32BIT, CAN_FILTER_MASK, id, mask);<br /> }</p> <p>?<br /> Thanks for this nice library that I have used now for many months, and I hope we can improve it with a little help from each other.<br /> Jean-Marc </p> http://forums.leaflabs.com/topic.php?id=802&page=7#post-105420 Tue, 03 Jun 2014 06:36:12 +0000 alexeys 105420@http://forums.leaflabs.com/ <p>Hi,<br /> Need help to configure can bus Filter.<br /> canbus.filter(idx,id,mask)<br /> what is idx ? how configure it?<br /> is id - msg.ID ? </p> http://forums.leaflabs.com/topic.php?id=802&page=7#post-105312 Sat, 05 Apr 2014 15:06:30 +0000 MelonFarmer 105312@http://forums.leaflabs.com/ <p>Edit: Had an issue where 500k Baud was not working. I was too quick to jump to here for help and didn't even think about termination. At any rate for anybody who has a similar problem, where 250k works, and 500k does not, ensure proper termination, because it might not work at a higher baud. </p> http://forums.leaflabs.com/topic.php?id=802&page=7#post-105299 Fri, 21 Mar 2014 06:59:26 +0000 Tiktaalik 105299@http://forums.leaflabs.com/ <p>Hi,<br /> I have a MapleIDE project using an SKPang CANbus shield, which was working nicely until I crushed it in a bag. I've bought an Olimexino and am trying to transfer my old sketch to the Oli, but my old sketch relied on MCP2515.c's Interrupt method. I'm sure I'm being dense, but although I can see the IRQ versus pool [sic?] modes in x893's lib (thanks, x893!) and other people's code posts, but I can't see the interrupt-handling functions in x893's lib.</p> <p>How do I detect and handle a CAN interrupt in a MapleIDE sketch using x893's lib?</p> <p>Thanks again to x893.<br /> Tik </p> http://forums.leaflabs.com/topic.php?id=802&page=7#post-105118 Thu, 26 Dec 2013 02:25:03 +0000 alfa 105118@http://forums.leaflabs.com/ <p>I've a difficulty in getting CAN work on Olimexino and I'm using Eclipse. I've followed what has been suggested by X893 &amp; Phone which includes updating 3 libmaple core libraries(rcc.h, rcc.c and usb.c) and Phone's bug fixes. Nevertheless, I ended up getting the following error:</p> <p>"libmaple/usb/stm32f1/usb.c:37: fatal error: usb_hardware.h: No such file or directory<br /> compilation terminated."</p> <p>Any hints/helps are highly appreciated..Thanks in advance. </p> http://forums.leaflabs.com/topic.php?id=802&page=7#post-104991 Fri, 29 Nov 2013 13:52:06 +0000 MelonFarmer 104991@http://forums.leaflabs.com/ <p>I'm running at 250kbps, most vehicles are around there I've found, so 1.25 is pretty generous, quite a bit of overhead, again I just fiddled around until I stopped losing messages! I imagine there's a better way to to that though. Also its extended IDs I'm using. </p> http://forums.leaflabs.com/topic.php?id=802&page=7#post-104977 Mon, 25 Nov 2013 16:34:59 +0000 iainism 104977@http://forums.leaflabs.com/ <p>1.25ms is fairly fast, what kind of bus utilisation does that give you?</p> <p>Edit: 1.25ms is VERY fast, if you're sending 11-bit IDs at 125kbps then an 8-byte message takes 1.004ms to send (including interframe spacing and assuming worst-case bit-stuffing) so if there's any other traffic on the bus then you're pretty much guaranteeing collisions! </p> http://forums.leaflabs.com/topic.php?id=802&page=7#post-104968 Sat, 23 Nov 2013 13:38:18 +0000 MelonFarmer 104968@http://forums.leaflabs.com/ <p>I'm using Maple IDE and x893's library with the fixes from other users. Works Great for everything I've been doing!</p> <p>I've heard some people like eclipse, but I've yet to try. Maple is just a glorified notepad, but it works well enough. </p> <p>I've done a couple projects with it and works great. </p> <p>If anybody was having an issue with sending a lot of messages in a row like I was here's a fix that works pretty good.</p> <pre><code>CAN_TX_MBX CANsendB(CanMsg *pmsg) { CAN_TX_MBX mbx; mbx = canBus.send(pmsg); while(mbx == CAN_TX_NO_MBX) { delayMicroseconds(1250); mbx = canBus.send(pmsg); } return mbx ; }</code></pre> <p>I took the code posted by Phono, but I would still lose a message or two, which for most applications is fine, however that didn't work for me. I found 1.25 ms was the smallest amount of time I could delay to not lose any messages after ~3-4 consecutive sends. I was using IRQ mode, if that maybe caused the requirement for that. </p> <p>As I also was sending/receiving serial at the same time, I need the delay to be very small, as the delay blocks reading and caused lost data. However I haven't had any issue with Data loss with that code so far. I'm open to improvements though, I ain't no expert. </p> http://forums.leaflabs.com/topic.php?id=802&page=7#post-104941 Sun, 17 Nov 2013 20:50:10 +0000 Giovanni 104941@http://forums.leaflabs.com/ <p>Hello MelonFarmer, hello every one, I am Giovanni from Brisbane Australia.</p> <p>I was reading this forum under suggestion of an Olimex forum, about the Olimexino-STM32.</p> <p>I want to start a project with the Olimexino-STM32 and CAN protocol.</p> <p>I have some question:</p> <p>- witch is the best enviroment to start a project? ( like IAR Embedded Workbench or Maple or eclipse..)</p> <p>- have any one a simple code that use Can Bus over the OLIMEXINO-STM32 board that is not using the "IAR Embedded Workbench 6.30" like in the Olimex Can Bus demo code?</p> <p>Appreciate Your time and help</p> <p>Have Fun</p> <p>Giovanni </p> http://forums.leaflabs.com/topic.php?id=802&page=7#post-28398 Mon, 12 Aug 2013 13:29:01 +0000 MelonFarmer 28398@http://forums.leaflabs.com/ <p>Good news everyone! I've managed to solve my problem. Ends up I needed to switch to CAN_MODE_NORMAL to get anywhere with the hardware I'm working with. </p> http://forums.leaflabs.com/topic.php?id=802&page=7#post-28382 Fri, 09 Aug 2013 17:59:36 +0000 MelonFarmer 28382@http://forums.leaflabs.com/ <p>Hi, i'm currently working on a project using three Olimexino-STM32s. Each board is to be connected to a separate CAN bus and then they will communicate to each-other via serial. So far I can communicate messages through serial and send CAN messages by using x893's files, however I cannot figure out how to make any board receive from the CAN bus. I am using multiple different CAN monitoring programs to send various CAN data as well as connection the boards to CAN devices to no avail. I have tried to use the code others in the thread posted, and still nothing. For anybody who is able to receive/read CAN messages, could you possibly post example code for it? Maybe also a checklist of sorts of what is required to receive? </p> http://forums.leaflabs.com/topic.php?id=802&page=6#post-26952 Tue, 18 Jun 2013 06:33:03 +0000 speakman 26952@http://forums.leaflabs.com/ <p>HDS: I would recommend you to move to libopencm3. Unfortenately CAN is currently missing the generated Docs but there is a pretty well-documented source and header files for CAN and there is even a CAN example in the libopencm3-examples repo.</p> <p>The libopencm3 also seems way mature than libmaple at the moment. I'm really satisfied with my switch. </p> http://forums.leaflabs.com/topic.php?id=802&page=6#post-26739 Fri, 14 Jun 2013 11:34:36 +0000 HDS 26739@http://forums.leaflabs.com/ <p>hi, x893 -<br /> I just was trying the code example you had posted above,<br /> but it seems to have been gone (<a href="http://akb77.com/g/stm32/maplehardwarecan/" rel="nofollow">http://akb77.com/g/stm32/maplehardwarecan/</a>)<br /> Is it still available?<br /> I#m just trying my first steps with CAN... </p>