http://forums.leaflabs.com/topic.php?id=13449 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:05:04 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=13449#post-28613 Thu, 29 Aug 2013 18:37:15 +0000 ala42 28613@http://forums.leaflabs.com/ <p>The baud rate on the virtual com port does not matter. </p> http://forums.leaflabs.com/topic.php?id=13449#post-28609 Thu, 29 Aug 2013 16:54:42 +0000 visualmicro2 28609@http://forums.leaflabs.com/ <p>Ignore the comment about the reset button failing. It was my test app that thought the port wan't coming back up after pressing reset.</p> <p>So it's really just that I am too stupid to work out how to properly send the proper DTR / "1EAF" to the port as ASCII :) </p> <p>Am I right in thinking the 1EAF needs to be sent at 115200 baud? </p> http://forums.leaflabs.com/topic.php?id=13449#post-28608 Thu, 29 Aug 2013 16:45:37 +0000 visualmicro2 28608@http://forums.leaflabs.com/ <p>Thanks for the replies. Yes I agree the port will be closed after the reset code has completed. </p> <p>The c# code is having no problems finding the device with dfu-util when in manual/perpetual bootloader mode, or with normal serial&gt;SerialUSB. (Yes thanks, I realize it can take a few seconds for the device to transition in and then out of dfu mode.</p> <p>After investigating some more it appears the maple is left in some strange state after writing the DTR / "1EAF" to the board. After writing 1EAF, the usb com port disappears as expected but the board is not found by dfu-util and the reset button fails to cause the board to reboot and subsequently appear as a serial usb device (after a few secs). </p> <p>After writing 1EAF, the only way to restore the board to a working state is to disconnect the usb for a few seconds then reconnect. It seems like the 1EAF is doing something but not everything :)</p> <p>Uggh, thanks for any help. </p> http://forums.leaflabs.com/topic.php?id=13449#post-28573 Tue, 27 Aug 2013 11:51:00 +0000 gbulmer 28573@http://forums.leaflabs.com/ <p>visualmicro2 - What OS are you using, Windows?</p> <p>When you reset the board, the USB port stops being a USB serial device, and is a USB DFU device.<br /> So I would expect the serial port to "lock up" because there is no longer a device there, and AFAIK, an OS, e.g. Windows, will take a little bit of time to notice. </p> <p>Further, on Windows, the serial port will be a different COM port when the Maple returns from being a DFU device. So I wouldn't expect to be able to talk to it as the same device (on Windows).</p> <p>After the board is reset, you could open it as a DFU device, and upload.</p> <p>So, I believe you will need to close the serialPort after you've done the reset and <code>serialPort.Write(&quot;1EAF&quot;);</code>. Then find the port again (a different COM on Windows) if you want to talk to the board. </p> http://forums.leaflabs.com/topic.php?id=13449#post-28572 Tue, 27 Aug 2013 11:47:07 +0000 mlundinse 28572@http://forums.leaflabs.com/ <p>After the reset sequence the Maple USB is no longer a serial device but a dfu device. So your C# serial connection will get cut off, and this happens without your program closing the serial port. Then a few seconds later, if you have a working sketch on your board, the dfu bootloader will start the sketch and the USB Serial port will reappear.</p> <p>Regards<br /> Magnus </p> http://forums.leaflabs.com/topic.php?id=13449#post-28569 Tue, 27 Aug 2013 11:29:48 +0000 visualmicro2 28569@http://forums.leaflabs.com/ <p>Can anyone help please. I am trying to replicate resetting to the bootloader using serial on a Rev3 board. Dfu works fine if I manually reset, maple uploads fine but I can't get a C# program to replicate the serial reset.</p> <p>I have an open serial port at 115200 baud, but when I attempt to reset the serial port "locks up" after writing 1EAF and does not work until the board has been reset. </p> <p>Interestingly the port still shows as being available after the reset fails but is unusable. I have tried various combinations, the default delay in the maple code is 50ms but have tried various shorted or longer delays.</p> <p> ` serialPort.BaudRate = 115200;</p> <p> // try to toggle DTR/RTS (old scheme)<br /> serialPort.RtsEnable = false;<br /> serialPort.DtrEnable = false;<br /> serialPort.DtrEnable = true;</p> <p> Thread.Sleep(idelay);</p> <p> serialPort.DtrEnable = false;</p> <p> // try magic number<br /> serialPort.RtsEnable = true;<br /> serialPort.DtrEnable = true;<br /> Thread.Sleep(idelay);</p> <p> serialPort.DtrEnable = false;</p> <p> Thread.Sleep(idelay);</p> <p> serialPort.Write("1EAF");</p> <p> //Thread.Sleep(idelay);</p> <p>Thanks</p> <p>Tim<br /> ` </p>