Lpc2000

Is it possible to simulate interrupts in the Insight debugger? I'd
like to somehow fire an IRQ interrupt.

We'll looking at the Phillips LPC2148 for a rackmount device where we're
considering using USB *instead* of DB9 (9600,N,8,1) for local
configuration and diagnostic support.

Has anyone here considered this type of application for USB?  Any
insight is greatly appreciated.

--- In lpc2000@yahoogroups.com, "James Dabbs" <jdabbs@t...> wrote:
> We'll looking at the Phillips LPC2148 for a rackmount device where we're
> considering using USB *instead* of DB9 (9600,N,8,1) for local
> configuration and diagnostic support.
> 
> Has anyone here considered this type of application for USB?  Any
> insight is greatly appreciated.

James,

a UART is great for point to point connections, a USB is not, unless
it is USB OTG.  If you use USB you would need to implement a Host that
controls it all and lots of devices "slaves".
Did you consider CAN? IMHO the price overhead for CAN and USB are
similar, both being about +$1 over a UART implementation. 
If you have a centralized system where one Host ("master") has control
over everything, this approach could be interesting. 

Please keep the group posted, at least I am very interested in the
challenges and opportunities of such an approach. 

Bob

This is certainly doable.  The issue is getting the USB stack.  The IAR
and Keil samples implement HID and Mass Storage devices, but not a
communications controller. Certainly, the hardware is capable of doing
Serial Emulation.  

 

The other issue is ISP.  If you want to change your code, the two easy
ways are ISP or JTAG.  So you might want to expose either of those
connectors.  On a design I have in process right now, I am bringing out
Serial 0 with RTS to enable ISP for the early versions of the product -
a safety net for field upgradability.

 

The elegant solution that I is in my product spec is to support IAP via
USB to allow the program to be updated.  Ideally, Philips would make a
USB version of the boot loader

 

Dan

 

  _____  

From: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com] On Behalf
Of James Dabbs
Sent: Wednesday, September 14, 2005 5:06 AM
To: lpc2000@yahoogroups.com
Subject: [lpc2000] USB Philosophical Question (slight OT)

 

We'll looking at the Phillips LPC2148 for a rackmount device where we're
considering using USB *instead* of DB9 (9600,N,8,1) for local
configuration and diagnostic support.

Has anyone here considered this type of application for USB?  Any
insight is greatly appreciated.




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[Non-text portions of this message have been removed]

> The elegant solution that I is in my product spec is to 
> support IAP via USB to allow the program to be updated.  
> Ideally, Philips would make a USB version of the boot loader

How far out is this?