Forums

USB Resource

Started by majid_mokhtari July 23, 2005
Hi everybody ,

I have just started using USB instead of RS485 in an especial medical
instrument . I am surfing on the web to find a good and practical
resource for introducing USB Protocol . It's planned to use LPC2138
, although I am also searching for USB controllers .

Any advice is welcomed ,

Majid


An Engineer's Guide to the LPC2100 Series

On Sunday 24 July 2005 06:26, majid_mokhtari wrote:
> Hi everybody ,
>
> I have just started using USB instead of RS485 in an especial medical
> instrument . I am surfing on the web to find a good and practical
> resource for introducing USB Protocol . It's planned to use LPC2138
> , although I am also searching for USB controllers .
>
> Any advice is welcomed ,

Why use the LPC2138? It does not have onboard USB and needs an extra chip via
serial. THis limits what you can do with it.

How about trying the ATMEL SAM7S64?

As for resources, the most helpful thing I have found with USB is using libusb
(ask uncle Google). This cuts through all the bull of writing drivers etc and
gets you going a lot faster, as well as being OS independent.

I find your logic to switch from RS485 to USB curious. They perform very
different roles. USB is good for communications between a device and a PC.
Between devices, CAN is a very good idea. CAN provides a similar function in
many ways to RS485 in that it is peer-to-peer and multi-drop.


Hi Majid,

the LPC2148 (or for smaller programs the LPC2142) are almost the same
devices as the LPC2148, just 2 analog inputs turned into D+ and D-
A board from Keil seems to be available www.keil.com/mcb2140

Cheers, Bob

--- In lpc2000@lpc2..., "majid_mokhtari" <majid_mokhtari@y...>
wrote:
> Hi everybody ,
>
> I have just started using USB instead of RS485 in an especial medical
> instrument . I am surfing on the web to find a good and practical
> resource for introducing USB Protocol . It's planned to use LPC2138
> , although I am also searching for USB controllers .
>
> Any advice is welcomed ,
>
> Majid


Try the Silabs CP2102 or wait for the new LPC2148

Davide B.

majid_mokhtari <majid_mokhtari@maji...> ha scritto:
Hi everybody ,

I have just started using USB instead of RS485 in an especial medical
instrument . I am surfing on the web to find a good and practical
resource for introducing USB Protocol . It's planned to use LPC2138
, although I am also searching for USB controllers .

Any advice is welcomed ,

Majid
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Hello,

you should also take a look at the TUSB3410 from TI.

Sastien 2005/7/29, Davide Bertolino <dadebertolino1@dade...>:
> Try the Silabs CP2102 or wait for the new LPC2148
>
> Davide B.
>
> majid_mokhtari <majid_mokhtari@maji...> ha scritto:
>
> Hi everybody ,
>
> I have just started using USB instead of RS485 in an especial medical
> instrument . I am surfing on the web to find a good and practical
> resource for introducing USB Protocol . It's planned to use LPC2138
> , although I am also searching for USB controllers .
>
> Any advice is welcomed ,
>
> Majid >
> SPONSORED LINKS
> Microcontrollers Microprocessor Intel microprocessors Pic microcontrollers
> 8085 microprocessor
>
> ---------------------------------
> YAHOO! GROUPS LINKS > > --------------------------------- >
>
> ---------------------------------
> Yahoo! Mail: gratis 1GB per i messaggi, antispam, antivirus, POP3 >
>
> SPONSORED LINKS
> Microcontrollers Microprocessor Intel microprocessors
> Pic microcontrollers 8085 microprocessor
>
> ________________________________
> YAHOO! GROUPS LINKS >
>
> ________________________________
>



Refer to:
http://www.compsys1.com/support/docs/usbp3.pdf
for USB interface chip with UART.

Sudip

Sastien Gruchet <gruchet@gruc...> wrote:
Hello,

you should also take a look at the TUSB3410 from TI.

Sastien 2005/7/29, Davide Bertolino <dadebertolino1@dade...>:
> Try the Silabs CP2102 or wait for the new LPC2148
>
> Davide B.
>
> majid_mokhtari <majid_mokhtari@maji...> ha scritto:
>
> Hi everybody ,
>
> I have just started using USB instead of RS485 in an especial medical
> instrument . I am surfing on the web to find a good and practical
> resource for introducing USB Protocol . It's planned to use LPC2138
> , although I am also searching for USB controllers .
>
> Any advice is welcomed ,
>
> Majid >
> SPONSORED LINKS
> Microcontrollers Microprocessor Intel microprocessors Pic microcontrollers
> 8085 microprocessor
>
> ---------------------------------
> YAHOO! GROUPS LINKS > > --------------------------------- >
>
> ---------------------------------
> Yahoo! Mail: gratis 1GB per i messaggi, antispam, antivirus, POP3 >
>
> SPONSORED LINKS
> Microcontrollers Microprocessor Intel microprocessors
> Pic microcontrollers 8085 microprocessor
>
> ________________________________
> YAHOO! GROUPS LINKS >
>
> ________________________________
>


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