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Thread
2005-06-25 by Pigeon
What do you'll think? (please only tell me if you have used both MCUs). My issue is, I have been working 2 or 3 nights to get interrupt driven USARTS working in C for my avr.. and no luck.. I feel if the documentation was better (even though they gave examples), this would of taken that long.. Is the documentaiton for the lpc2*** that much better than AVRs? thanks Lee [Non-text portions of this message have been removed]
2005-06-25 by Joe G (Work)
Some times 3rd party doucmention on the IC is better. See http://www.hitex.co.uk/arm/lpc2000book/index.html Sometimes a 3rd party Yahoo user group is better for the explanations..... Oh like this news group........ Some time the tool vendors Keil, IAR, GCC and others have better code examples. Regards Joseph ----- Original Message -----
From: "Pigeon" <fredit@...> To: <lpc2000@yahoogroups.com> Sent: Saturday, June 25, 2005 12:16 PM Subject: [lpc2000] Who has better documentation ... Atmel or Phillips? > What do you'll think? (please only tell me if you have used both MCUs). > > My issue is, I have been working 2 or 3 nights to get interrupt driven > USARTS working in C for my avr.. and no luck.. > > I feel if the documentation was better (even though they gave examples), > this would of taken that long.. > > Is the documentaiton for the lpc2*** that much better than AVRs? > > > thanks > Lee > > [Non-text portions of this message have been removed] > > > > > Yahoo! Groups Links > > > > > > > >
2005-06-25 by Richard
That seems a bit... unusual. I haven't looked at the code in detail, but we have some interrupt driven UART code (the usual ring buffer routines) in our ICCAVR examples directory and they don't look too complicated. May be your can d/l our demo and just look at that portion for inspirations. The ARM devices generally have a hard to use interrupt architecture, just because each device family usually have some sort of VIC (vectored interrupt controller) and each one could be quite different from another. e.g. LPC2000 UART interrupt handling is probably quite a bit different from SAM7S interrupt handling and the VIC code can be quite tricky to get right. In that sense, the AVR is easier to work with. At 07:16 PM 6/24/2005, Pigeon wrote: >What do you'll think? (please only tell me if you have used both MCUs). > >My issue is, I have been working 2 or 3 nights to get interrupt driven >USARTS working in C for my avr.. and no luck.. > >I feel if the documentation was better (even though they gave examples), >this would of taken that long.. > >Is the documentaiton for the lpc2*** that much better than AVRs? > > > // richard (This email is for mailing lists. To reach me directly, please use richard at imagecraft.com)
2005-06-25 by Bill Knight
Lee Look for UT050418A.zip in the files section of LPC2000 on Yahoo for interrupt driven uart code for the LPC. Look for "UART Module" (ID 34) in the User Projects section on AVRFreaks.net for some old interrupt driven uart code for the AVR. Regards -Bill Knight R O SoftWare & http://www.theARMPatch.com
On Fri, 24 Jun 2005 22:16:32 -0400, Pigeon wrote: >What do you'll think? (please only tell me if you have used both MCUs). >My issue is, I have been working 2 or 3 nights to get interrupt driven USARTS working in C for my avr.. and no luck.. >I feel if the documentation was better (even though they gave examples), this would of taken that long.. >Is the documentaiton for the lpc2*** that much better than AVRs? >thanks >Lee
2005-06-25 by Alex Gibson
Pigeon wrote: > What do you'll think? (please only tell me if you have used both MCUs). For avr, have you looked on avrfreaks.com yet ? Lots of code for the different compilers. > My issue is, I have been working 2 or 3 nights to get interrupt driven USARTS working in C for my avr.. and no luck.. > > I feel if the documentation was better (even though they gave examples), this would of taken that long.. > > Is the documentaiton for the lpc2*** that much better than AVRs? No not at all. IMO Philips still have a way to go to meet Atmels level of documentation. And atmels website is a thousand times better than Philips. You can view tables fullscreen properly. Things a half decent web designer should be able to do very easily. Compare these two links http://www.semiconductors.philips.com/markets/mms/products/microcontrollers/product_catalog/16_32bit/index.html http://www.atmel.com/dyn/products/param_table.asp?family_id=607&OrderBy=part_no&Direction=ASC Additionally Atmel lets you download it to use in excel or http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=74 http://www.semiconductors.philips.com/catalog/219/282/45988/45993/45994/ and http://www.microchip.com/ParamChartSearch/chart.aspx?branchID=1004&mid=10&lang=en&pageId=74 Lot more docs for the avr , lot more app notes. Lot more code available on the net for the avr. Should be able to get the usarts up and running in c , in a lot faster than that on the avrs. Tried getting the usarts working by themselves before adding the rest of your code ? Alex
2005-06-25 by Robert Adsett
At 01:57 AM 6/26/05 +1000, Alex Gibson wrote: >IMO Philips still have a way to go to meet Atmels level of >documentation. And atmels website is a thousand times better than Philips. OTOH Atmel prevents you from cut and pasting from their docs. Robert " 'Freedom' has no meaning of itself. There are always restrictions, be they legal, genetic, or physical. If you don't believe me, try to chew a radio signal. " -- Kelvin Throop, III http://www.aeolusdevelopment.com/
2005-06-25 by Pigeon
Yeah, I have tried working with USARTs by themself.. maybe my issue is that I don't have C skills.. because I see all the code, and when I try to use it.. there are missing things. oh well, thanks for all the responses Lee
----- Original Message -----
From: Alex Gibson
To: lpc2000@yahoogroups.com
Sent: Saturday, June 25, 2005 11:57 AM
Subject: Re: [lpc2000] Who has better documentation ... Atmel or Phillips?
Pigeon wrote:
> What do you'll think? (please only tell me if you have used both MCUs).
For avr, have you looked on avrfreaks.com yet ?
Lots of code for the different compilers.
> My issue is, I have been working 2 or 3 nights to get interrupt driven USARTS working in C for my avr.. and no luck..
>
> I feel if the documentation was better (even though they gave examples), this would of taken that long..
>
> Is the documentaiton for the lpc2*** that much better than AVRs?
No not at all.
IMO Philips still have a way to go to meet Atmels level of
documentation. And atmels website is a thousand times better than Philips.
You can view tables fullscreen properly. Things a half decent web
designer should be able to do very easily.
Compare these two links
http://www.semiconductors.philips.com/markets/mms/products/microcontrollers/product_catalog/16_32bit/index.html
http://www.atmel.com/dyn/products/param_table.asp?family_id=607&OrderBy=part_no&Direction=ASC
Additionally Atmel lets you download it to use in excel
or
http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=74
http://www.semiconductors.philips.com/catalog/219/282/45988/45993/45994/
and
http://www.microchip.com/ParamChartSearch/chart.aspx?branchID=1004&mid=10&lang=en&pageId=74
Lot more docs for the avr , lot more app notes.
Lot more code available on the net for the avr.
Should be able to get the usarts up and running in c , in a lot faster
than that on the avrs.
Tried getting the usarts working by themselves before adding the rest of
your code ?
Alex
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