USB CDC Communications for Dummies!

[dhouston]

For CDC, baudrate is a meaningless parameter. You can set hyperterminal/vbSerialPort a whatsoever baudrate, the usb engine will emulate a serial communication as fast as it can

I'm not talking about transmission speed and I agree that baudrate has little meaning in this context. However, I have had a lot of experience downloading firmware files which might be as big as 64KB and there is a very noticeable difference between sending them via Serial->USB->Serial vs. sending them Serial->Serial with the latter being much faster as a result of the translation that must occur (on both ends). CDC should only need to translate on the PC end but I suspect there will be a significant speed hit never-the-less on certain applications.

[mister_e]

True that. CDC is really handy for older software unable to deal with USB, somehow easier to program on both side... but to me, IN 20XX... it still sucks.

I know your arguments... but ...Pure USB for me... all the way.

[cncmachineguy]

Steve, when do we get the pure USB for dummies? Both ends, PiC and PC??

[mister_e]

USBDemo was a kickstart for many. Time changed, PBP work tad different now, mcHID.dll/MCSP/EasyHid = somehow a dead duck, VB6 is a long time outdated thing, seems Jan Axelson code examples are not for everyone... so yeah I think it's about time.

I know how, I know something rock solid. Keyword: be patient...

(Still, there's LOAD of ressource/ready to go components/lib over the net on the PC side)

[cncmachineguy]

and I quote:

AAwwww come on guy, don't be lazy

After spending my weekend searching and reading. I have come to the conclusion there is in fact - tons of examples and ready stuff all over the net. But does this help if one doesn't know where to start? Even bought Jan's book to help me. And it did. Now I assume my weekends work would amount to 30 minuites for someone able to write a picmulticalc. So a quick VB express (cuz it free to all) example passing a byte or 2 back and forth. Nothing more then that as it will overwhelm those who don't get it. ( read as ME ME ME)

[mister_e]

After spending my weekend searching and reading. I have come to the conclusion there is in fact - tons of examples and ready stuff all over the net. But does this help if one doesn't know where to start? Even bought Jan's book to help me. And it did. Now I assume my weekends work would amount to 30 minuites for someone able to write a picmulticalc. So a quick VB express (cuz it free to all) example passing a byte or 2 back and forth. Nothing more then that as it will overwhelm those who don't get it. ( read as ME ME ME)

Everyone must start somewhere. Been there done that. I'm not more clever than anybody, but maybe I put more time & effort. I never found a magic potion to know everything and how to do things in a snap.
1) have a project
2) find information, read, digest them
3) try something
4) wash & rinse 'till it works

You CAN'T learn VB (or else) in a day. It take months, years. I learnt the hard way too. The more you do, the more you develop tricks....the easier it gets.

Don't give up!

[cncmachineguy]

Don't give up!

NEVER!!

I learned ASM with nothing more then the datasheet for my chip I wanted to use. So I won't give up. But its nice to have people to ask for help. No, I don't profess to even come close to knowing all there is to know about ASM, but I can get by.

[dhouston]

Keyword: be patient...

Ahh, you mean like waiting for the long-promised Tibbo EM500/GA1000 firmware. I'm down with that.

[mister_e]

Ahh, you mean like waiting for the long-promised Tibbo EM500/GA1000 firmware. I'm down with that.

OH Really? Weird, It's the really first time I hear you about this long-promised Tibbo EM500/GA1000 firmware.

Ham Mucus

[dhouston]

OH Really? Weird, It's the really first time I hear you about this long-promised Tibbo EM500/GA1000 firmware.

Yeah - I've probably made my point so I guess I'll go back to patiently waiting in silence.

[Ioannis]

I know how, I know something rock solid. Keyword: be patient...

Hi Steve. Any news about this promised demo?

Ioannis