Comments for Circuits@Home

Comment on HID support for USB Host Shield Library 2.0 released by Martin Evans

Martin Evans — Fri, 10 Feb 2012 17:12:22 +0000

I’m using Arduino UNO with latest USB shield and latest version of the library. I can successfully upload most of the examples apart from
USBHID_desc where I get the following error

Binary sketch size: 30256 bytes (of a 32256 byte maximum)
avrdude: stk500_recv(): programmer is not responding

Thanks

Comment on Reading rotary encoder on Arduino by oleg

oleg — Fri, 10 Feb 2012 03:36:35 +0000

try this -> http://www.arduino.cc/en/Reference/PortManipulation

Comment on Reading rotary encoder on Arduino by DexterIsMyHero

DexterIsMyHero — Thu, 09 Feb 2012 23:41:24 +0000

Thanks Oleg. I figured it had to be hookup problems.

So, it seems there are three different names for everything.

Is there one document where all these various names are listed and cross-referenced?

Comment on USB Isolator Most Frequently Asked Question by oleg

oleg — Thu, 09 Feb 2012 17:30:44 +0000

PSU is not included, you may use any wall wart with standard center positive round connector and 9-24V output. If you don’t have any lying around, this one will work -> http://www.sparkfun.com/products/9442 .

Comment on Linear power supply on USB isolator board. by Bent

Bent — Thu, 09 Feb 2012 17:27:16 +0000

I’m interested in this as well!

Comment on USB Isolator Most Frequently Asked Question by Bent

Bent — Thu, 09 Feb 2012 17:21:06 +0000

1) Does this thing come with a PSU?
2) If no PSU is supplied, then what is recommended?

Comment on Interfacing Arduino to a Cellular Phone by TimS

TimS — Thu, 09 Feb 2012 03:04:48 +0000

I got the USB Host shield to initialize with the following output using acm_terminal:

Start
ACM Init
Addr:1
NC:1
Conf.Val: 01
Iface Num: 00
Alt.Set: 00
Endpoint descriptor:
Length: 07
Type: 05
Address: 81
Attributes: 03
MaxPktSize: 0040
Poll Intrv: 20
Conf.Val: 01
Iface Num: 01
Alt.Set: 00
Endpoint descriptor:
Length: 07
Type: 05
Address: 82
Attributes: 02
MaxPktSize: 0040
Poll Intrv: 00
Conf.Val: 01
Iface Num: 01
Alt.Set: 00
Endpoint descriptor:
Length: 07
Type: 05
Address: 02
Attributes: 02
MaxPktSize: 0040
Poll Intrv: 00
Conf:1
ACM configured
Ret: FF
Ret: FF
Ret: FF
Ret: FF
Ret: FF
Ret: FF
Ret: FF

But I can’t talk to the v3m. I am able to connect directly to the v3m and a terminal program and execute commands, so I feel that the phone is talking. But I am having trouble figuring out why the USB Host Shield won’t talk to the v3m. Any insight would be appreciated.

Comment on Reading rotary encoder on Arduino by oleg

oleg — Thu, 09 Feb 2012 01:47:04 +0000

The sketch expects encoder on PORTC pins 0 and 1. For 2560 it is pins 37, 36 on Arduino connector. You need to move the encoder to these pins or change the sketch.

Comment on Reading rotary encoder on Arduino by DexterIsMyHero

DexterIsMyHero — Thu, 09 Feb 2012 01:29:25 +0000

OK, sprinkling Serial.println statements for troubleshooting.

It’s making it to loop(), and executing tmpdata = read_encoder()

read_encoder is getting run endlessly.

It must be the if statement in loop()

if (tmpdata)

no tmpdata being read? and no else, so the loop just….loops, reading nothing, doing nothing?

Comment on Reading rotary encoder on Arduino by DexterIsMyHero

DexterIsMyHero — Thu, 09 Feb 2012 01:02:10 +0000

I set up my ATmega 2560 with the above sketch. It will print “start” in the terminal window, so I know it’s finishing setup().

Nothing else seems to be happening.

I know my encoder works, because I’ve used it with another encoder reading sketch. And I’m pretty sure I’ve got it connected as per the instructions. Encoder A and B leads to Analog In A0 and A1, encoder C lead to GND.

I’ve got pins numbered 14 & 15, (Communication, tx3 and rx3) but I’m pretty sure you didn’t mean those pins. Plus the fact the sketch doesn’t work with those pins either.

What could be wrong? Please advise.