Hi Lefty,Yes, I followed all the procedures listed in the serial port was still unable to be selected.According to this site, it tells 'You can check that the drivers have been installed by opening the Windows Device Mananger (in the Hardware tab of System control panel). Look for a 'USB Serial Port' in the Ports section; that's the Arduino board. 'When I opened the Widows Device Manager as instructed, I could not find a 'USB Serial Port'or the Ports section. What do you think is the problem?I did find an section in the device manager which appears as 'Other Devices' andin this section, USB-Serial Controller was included. However, the problem isthis controller could not be installed, at least that was what it said on the properties.Are there any ways, I can update the driver software to solve this problem?So far, I found no luck. Hi Lefty,Yes, I followed all the procedures listed in the serial port was still unable to be selected.According to this site, it tells 'You can check that the drivers have been installed by opening the Windows Device Mananger (in the Hardware tab of System control panel). Look for a 'USB Serial Port' in the Ports section; that's the Arduino board.

1. Error Reading From Serial Device

'When I opened the Widows Device Manager as instructed, I could not find a 'USB Serial Port'or the Ports section. What do you think is the problem?I did find an section in the device manager which appears as 'Other Devices' andin this section, USB-Serial Controller was included. However, the problem isthis controller could not be installed, at least that was what it said on the properties.Are there any ways, I can update the driver software to solve this problem?So far, I found no luck. I had the same problem on WinXP (3SP) but not in Win7 with the same board. After too many hours and some cups of coffee I found this: which includes (at the bottom of the page) an exe file with the name ch341ser.exe. I executed it and in less of few seconds the issue solved! This company poduces clones with the same chipsets and microcontrolers but with software that runs.

So, the 'USB2.0 ser' run out and UNO took a port under 'COM & LPT' section. I have an Arduino Leonardo board that I have been successfully programming, on Windows 7 using IDE 1.6.4. But suddenly it is no longer recognized.

Error Reading From Serial Device

It does not appear as a device in the computer device manager and it does not show up as available on a port, any port! The green 'power' light comes on and the bootloader makes the 'L' light blink after the board is reset, but no communication is possible thru Rx/Tx. I had been using pins 0-5 as outputs to LED's, pins 6-7 as outputs to drive solenoids, pins 8-12 as inputs from switches. Circuit driving the solenoids included diodes for back-emf from the solenoids. It had been 'working', but I needed to make a small tweek and now I can no longer see the board, even with all other stuff stripped off the Leonardo board. What went wrong?

It still runs the program I have loaded, but I cannot get the Rx/Tx lights to blink. Thanks, I downloaded CH341SER.ZIP, created a folder on the desktop, put CH341SER.zip in that folder, unzipped it and ran the Setup file, it took a moment with nothing then it told me it had successfully installed the driver. Surprise, it works great.

It shows up as COM3: on my XP machine. Since I am not very good in non English languages here is the final link. It should be the first file below download. 8/5/2015, lots of luck to all. I also run Mint on this machine and it worked just fine so I knew the hardware was OK.Find,Thanks Gil. I am having the same problem with the port being greyed out. I have an arduino mega 2560I am running a dual boot 64 bit laptop with Ubuntu 15.04 and Windows 8.1.

Attachments:On Jun 25, Jonas Hulten wrote: I want to make a game that uses the link cable. Is it possible to=20 develop it even if I'm using serial dc-load (a lot of cable swapping is20 acceptable in worst case). Can someone point out where I can find=20 information about using the serial port in KOS? Is it possible to=20 disable dc-load for a while and enable it when the game finishes during20 development?Take a look at the dbgio module (kernel/arch/dreamcast/kernel/dbgio.c). Ithandles the basic serial I/O. This is one of those pieces that shouldprobably have been a little more thought out, but for the most part peopleonly use it for debug output, so simpler is better.You can start dc-tool with '-n' to have it disconnect its 'console'.

Thisway you can upload the program and then detach the cable to use withsomething else.Your major problem will be getting debug output out of the thing (unlessyou have a BBA, in which case you can just use dc-load-ip and take over theserial completely). You can take over the kernel's debug callback functionand put it in a buffer (retrieved later with dc-tool) or perhaps make aPVR console that displays an overlay with messages.

Dan Potter wrote:Take a look at the dbgio module (kernel/arch/dreamcast/kernel/dbgio.c). Ithandles the basic serial I/O.

This is one of those pieces that shouldprobably have been a little more thought out, but for the most part peopleonly use it for debug output, so simpler is better.You can start dc-tool with '-n' to have it disconnect its 'console'. Thisway you can upload the program and then detach the cable to use withsomething else.How do I restart it after the game? I don't want to switch off and onafter every run if I don't have to.Your major problem will be getting debug output out of the thing (unlessyou have a BBA, in which case you can just use dc-load-ip and take over theserial completely). You can take over the kernel's debug callback functionand put it in a buffer (retrieved later with dc-tool) or perhaps make aPVR console that displays an overlay with messages.I'll get along without debug output if I have to. I ordered a BBA a longtime ago but it never arrived. Sigh, now I regret that I didn't buy thelan adapter I was offered once./Jonas.

Attachments:On Jun 25, Jonas Hult?n wrote: How do I restart it after the game? I don't want to switch off and on=20 after every run if I don't have to.You don't have to restart it (if I understand your question correctly). The-n just makes it so it doesn't try to attempt any serial communication whilethe loaded program is running. I'll get along without debug output if I have to. I ordered a BBA a long20 time ago but it never arrived. Sigh, now I regret that I didn't buy the20 lan adapter I was offered once.Heh, yeah, they are pretty rare.=20. Attachments:On Jun 25, Jonas Hult?n wrote: Ok, I see.

What about serial interrupts then? I don't think it would be20 a good idea to poll the port.Ahh, well, that's another of those things that I meant when I said that thedbgio module was overly simplistic for real serial port usage. It doesn'thandle interrupts at all.

At one time there was an interrupt-drivenbuffering serial driver but it was kind of buggy and got thrown out a longtime ago.What you might be able to do is turn on serial interrupts manually and thenuse the dbgio functions in your interrupt handler, if you wanted to writeyour own.This is something that probably needs to be fixed eventually anyway though,as I'd like to have the serial cable based debugging for KOS 1.3.x use PPPand a real TCP/IP stack instead of the dcload protocols. That's the plananyway. Perhaps what would be best is a totally new serial module that canbe used instead of dbgio after things are bootstrapped. Dan Potter wrote:Ahh, well, that's another of those things that I meant when I said that thedbgio module was overly simplistic for real serial port usage. It doesn'thandle interrupts at all.

At one time there was an interrupt-drivenbuffering serial driver but it was kind of buggy and got thrown out a longtime ago.What you might be able to do is turn on serial interrupts manually and thenuse the dbgio functions in your interrupt handler, if you wanted to writeyour own.Oh, then I probably have to write my own. Any pointers to documentationon interrupt registers?/Jonas.

I wrote a tutorial on the VMU code, it's available in the consolevision.comforums. I'd throw you a link, but I can't seem to access consolevision.comright now. Ok, my computer was just being stupid. Actually, I would like to have the code. However, first, what license is itunder?Thanks to everyone for the tips.-Brandon-Original Message-From: cadcdev-kallistios-admin@.mailto:cadcdev-kallistios-admin@.On Behalf OfJonas HultenSent: Saturday, June 28, 2003 4:34 AMTo: cadcdev-kallistios@.Subject: Re: KOS VMU save/load codeBrandon Parker wrote:Does anyone have a good tutorial on how to use the VMU to save and loaddata.I have a small and independent vmu C class that loads and saves vmufiles and draws bitmap graphics easily. I also have two pictureconverters that can be run in DOS or Cygwin to convert from BMP to thenative icon formats.

Do you want them?/Jonas-This SF.Net email sponsored by: Free pre-built ASP.NET sites includingData Reports, E-commerce, Portals, and Forums are available now.Download today and enter to win an XBOX or Visual Studio.NET.Cadcdev-kallistios mailing listCadcdev-kallistios@. On 24 Jun 2003 at 19:27, Dan Potter wrote: Your major problem will be getting debug output out of the thing (unless you have a BBA, in which case you can just use dc-load-ip and take over the serial completely).

You can take over the kernel's debug callback function and put it in a buffer (retrieved later with dc-tool) or perhaps make a PVR console that displays an overlay with messages.When there's a will there's a way. When I was porting crack-attack, i got debug output using the vmu screen. I made a 'font' soi could display numbers, and printed numbers on the screen at variouspoints, with that i could tell where the problem was. Most of myproblems were 'the program stops running' though:)on an offtopic note. Pegasus handles the pgp attachments just fine,but the exchange server at my school nukes the attachments:( (i'mnow subscribed through another address that doesn't nuke theattachments, even though i don't run pgp/gpg to verify your messages:).