http://forums.leaflabs.com/topic.php?id=1690 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:15:28 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=1690#post-10628 Sat, 12 May 2012 10:42:02 +0000 mbolivar 10628@http://forums.leaflabs.com/ <p>i use the <a href="http://www.blacksphere.co.nz/main/blackmagic">black magic debug probe</a> with the <a href="http://wiki.leaflabs.com/index.php?title=Maple_JTAG_Adapter">maple jtag adapter</a>.</p> <p>never tried it on windows, but the black magic probe is totally awesome on linux. just plug it in, it pops up as a /dev/ttyACM that you point GDB at, and everything Just Works. no messing around with openocd TCL scripts! </p> http://forums.leaflabs.com/topic.php?id=1690#post-10618 Fri, 11 May 2012 16:43:13 +0000 gdstew 10618@http://forums.leaflabs.com/ <p>It's good to see that you will verify that the modification works correctly.</p> <p>I know the reset button on the board works, I've used it several times since making the<br /> mod. I just finished checking out the reset pin on the shield connector using an Adafruit<br /> motor shield and it works too !</p> <p>What hardware and software do you use for JTAG ? I'm looking for a hopefully inexpensive<br /> way to get some experience using it. Thanks. </p> http://forums.leaflabs.com/topic.php?id=1690#post-10586 Thu, 10 May 2012 10:18:56 +0000 mbolivar 10586@http://forums.leaflabs.com/ <p>thanks for the write up! i've previously severed the connection between NRST and PB4 in a way which had the unfortunate consequence of the reset button not working correctly. i'll look at this along with the PDF you sent, and try your way out to make sure JTAG still works.</p> <p>if everything's kosher, the right place for this is probably the official docs for the errata. </p> http://forums.leaflabs.com/topic.php?id=1690#post-10579 Wed, 09 May 2012 13:16:20 +0000 gdstew 10579@http://forums.leaflabs.com/ <p>For anybody who is interested I have a fix for the PB4 errata on Maple R5, R6 boards. It<br /> requires two trace cuts, one on the top and one on the bottom of the board, and one jumper<br /> on the bottom of the board.</p> <p>NOTE: This should only be done by someone with at least some experience doing PCB<br /> modifications. That said, it is an easy mod to make for someone with that<br /> experience.</p> <p>I have modified a two page PDF drawing to show where the cuts are made and where the<br /> jumper is placed. Since there is no way to add attachments in this forum I sent the<br /> PDF to Leaflabs via email and they should be able to make it available to forum members.<br /> The bottom of the board is on page 1, and the top of the board is on page 2. The cuts<br /> are marked by red Xs and the jumper is the red line with the via pads it is soldered<br /> to marked with red circles (note that X on the bottom of the board is right next to the<br /> circled via). Using the through-hole via pads for the jumper makes it much easier to<br /> solder in place. The jumper is standard 30 ga. solid wire wrap wire. I used a very small<br /> drill bit (#80) to remove the mask from the center of the vias so that the very short<br /> length of stripped jumper wire could be inserted into the vias to help hold it in place.<br /> I used a drill bit slightly larger than the via pads to VERY GENTLY remove the mask from<br /> the pads for soldering. Or you could just VERY GENTLY scratch it off with knife used to<br /> cut the traces.</p> <p>After the mod is made the PB4 pin (56) is only connected to the JTAG connector pins (1, 8).<br /> The processor NRST pin (7) is still connected to R4, the reset push button pins (2, 4) and<br /> the J4 pin (1). All of these were verified using a digital multi-meter. After verifying the<br /> mod, the board was powered up and functioned normally. I could not however verify the JTAG<br /> interface because I do not have the hardware/software to do so. </p>