Hi, I've put together my USBtinyISP (attached pics below), and I get 5V at various points on the board when plugged in, but it seems that pin 12 on the ATTINY2313, which is the only thing that could be powering that LED if I follow the traces, is at 0V.
More importantly, though - it doesn't show up in the device list, and avrdude has no idea it's plugged in.
I'm using Mac OS X 10.6.8 and avrdude version 5.8cvs, and tried to write out to it to get the LED to turn on, but it either gives me the no device prompt or when I go to check for it with "ls -l /dev/cu.*", I only get the following (screenshot):
Board Top
Board Bottom
Device List
Board looks good, power to rails, LED not on?
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- frontispiece
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Re: Board looks good, power to rails, LED not on?
http://www.ladyada.net/make/usbtinyisp/faq.htmlWhy is there no Serial/COM/port (or /dev/ttyXX device) ?
USBtiny is not a USB-Serial dervice, it is its own USB protocol which is understood by Avrdude. You will not see a COM port or Serial port created when you plug it in
- frontispiece
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Re: Board looks good, power to rails, LED not on?
Sorry, I posted the wrong screenshot - avrdude is not finding the USBtinyISP at all:
- scott_42
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Re: Board looks good, power to rails, LED not on?
Use System Profiler and see if the USB bus recognizes the device. Hold down option key while selecting the Apple menu to quickly get to System Profiler (the first item in the menu).
- frontispiece
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Re: Board looks good, power to rails, LED not on?
Hi Scott-42,
No, it doesn't recognize it in System Profiler - but as adafruit said,
No, it doesn't recognize it in System Profiler - but as adafruit said,
, so I don't think it would show up there anyway? It doesn't light up on Linux either, so I know it's not just the documented OSX trick with the LED.USBtiny is not a USB-Serial dervice, it is its own USB protocol which is understood by Avrdude. You will not see a COM port or Serial port created when you plug it in
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Re: Board looks good, power to rails, LED not on?
go back and touch up all the solder points, in case thats the problem
- scott_42
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Re: Board looks good, power to rails, LED not on?
You would be wrong then. System Profiler will list all of the working devices attached to the USB buses. This would include the USBtiny if it were working correctly. If it is not showing up under the USB hardware section attached to one of the USB Buses, then your device is not working.frontispiece wrote:No, it doesn't recognize it in System Profiler - but as adafruit said, … , so I don't think it would show up there anyway?
Have you used System Profiler before and are you familiar with how it works? Do you see the other USB devices listed on the various USB buses attached to your computer?
- frontispiece
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Re: Board looks good, power to rails, LED not on?
Hi, thank you both for your help. I took your advice and
- went through to resolder anything that might've been a cold-joint or rough/frosted or not flowed onto the pad properly, and it's still not working
- double checked System Profiler (yes, I've used it before), and it's not showing up, but I'll look forward to seeing it there when it finally gets working. And yes, all other USB devices show up as expected when plugged in.
Here's a high-res shot of the board after touching up, if you've got any ideas left I'd love to try them...
Thanks again,
- went through to resolder anything that might've been a cold-joint or rough/frosted or not flowed onto the pad properly, and it's still not working
- double checked System Profiler (yes, I've used it before), and it's not showing up, but I'll look forward to seeing it there when it finally gets working. And yes, all other USB devices show up as expected when plugged in.
Here's a high-res shot of the board after touching up, if you've got any ideas left I'd love to try them...
Thanks again,
- brucef
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Re: Board looks good, power to rails, LED not on?
Just for reference, my known good USBtinyISP shows up in System Information (OS X 10.7 'Lion') like so:
To get it to show up I have to start System Information *after* connecting the USBtinyISP, but I do not have to have already talked to it with avrdude.
Code: Select all
USBtiny:
Product ID: 0x0c9f
Vendor ID: 0x1781
Version: 1.04
Speed: Up to 1.5 Mb/sec
Location ID: 0x06200000 / 4
Current Available (mA): 500
Current Required (mA): Unknown (Device has not been configured)
- frontispiece
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Re: Board looks good, power to rails, LED not on?
Thanks, I double checked (checking after plugging in ) just to be sure, but still no luck. Thanks for the reference info though!
- frontispiece
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Re: Board looks good, power to rails, LED not on?
Hi, sorry to bump this, but after working on more projects and coming back to this assembly, I'm still wondering about my board - I've made sure all solder points are good, and it doesn't show up in System Profiler when it's plugged in, but the rails show power. Is there a chance I have a faulty chip?
- adafruit_support_bill
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Re: Board looks good, power to rails, LED not on?
It is possible you got a bad or unprogrammed chip. Contact [email protected] about a replacement USBTinyISP microcontroller & link this thread in your message.
Please be positive and constructive with your questions and comments.