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2005-07-19 by gen_4p
I've been out of the ARM loop for some time now. That time I was going to use 2138, but it didn't work for me because of extra cycles added on IO writing. As I remember, during the subject discussion Philips promised 2138-type controller with fast IOs (in 6-8 weeks?). Does anybody know if there are any developments in this area? Thank you, Gennady
2005-07-19 by lpc2100_fan
Hi, the LPC2148 (LPC2138 with USB) has fast I/O. In an assemler test program we were able to switch the ports with a frequency of CPU/4, ergo 15 MHz. Because this chip also has an improved UART, it is possible to reach even 115200 Baud with 60 MHz, no need to use 14.756 MHz any more if you prefer even frequencies (like I do). In fact for the USB you might want to use 12 MHz external anyhow. Cheers, Bob --- In lpc2000@yahoogroups.com, "gen_4p" <gennadyp@j...> wrote: > I've been out of the ARM loop for some time now. > That time I was going to use 2138, but it didn't work for me because of > extra cycles added on IO writing. > As I remember, during the subject discussion Philips promised 2138- type
> controller with fast IOs (in 6-8 weeks?). > Does anybody know if there are any developments in this area? > > Thank you, > Gennady
2005-07-19 by Gennady Palitsky
Thanks Bob, > Hi, > > the LPC2148 (LPC2138 with USB) has fast I/O. In an assemler test > program we were able to switch the ports with a frequency of CPU/4, > ergo 15 MHz. > I believe it's not the actual IO toggle speed, but moving of data from from flash to IO (VPB related?) that took extra cycles on 'before 2148' controllers. Loading consecutive data from flash and storing at a port took 10 cycles. Is this changed on the 2148? Gennady
2005-07-19 by lpc2100_fan
Hi Gennady, that has changed in deed, the ports are no longer connected to the VPB bus, not even to AHB but to the memory bus, which is even faster than the AHB connected ports. Bob --- In lpc2000@yahoogroups.com, "Gennady Palitsky" <gennadyp@j...> wrote: > Thanks Bob, > > > Hi, > > > > the LPC2148 (LPC2138 with USB) has fast I/O. In an assemler test > > program we were able to switch the ports with a frequency of CPU/4, > > ergo 15 MHz. > > > > I believe it's not the actual IO toggle speed, but moving of data from from > flash to IO (VPB related?) that took extra cycles on 'before 2148' > controllers. Loading consecutive data from flash and storing at a port took
> 10 cycles. > Is this changed on the 2148? > > Gennady
2005-08-16 by Randy Ott
I see now difference between the LPC2138 and 2148 in I/O speed. I
have a piece of code that toggles an I/O pin to write to an external
FPGA. The time to set then clear this pin is exactly the same with
the 2148 as it was with the 2138.
This is a listing of the complied code:
// Toggle WE pin
\ 00000048 4004A0E3 MOV R0,#+0x40000000
\ 0000004C 000083E5 STR R0,[R3, #+0]
105 FPGA_WE_IOCLR = FPGA_WE_BIT;
\ 00000050 080083E5 STR R0,[R3, #+0x8]
There are 2 STR instructions in a row to do the set/reset. As I
said, no difference in speed with the 2148.
Also, does anyone know where the 8k block of RAM for USB DMA is
located in the memory map? I would like to use this for general
purpose storage.
Randy Ott
--- In lpc2000@yahoogroups.com, "lpc2100_fan" <lpc2100_fan@y...>
wrote:
> Hi Gennady,
>
> that has changed in deed, the ports are no longer connected to the
VPB
> bus, not even to AHB but to the memory bus, which is even faster
than
> the AHB connected ports.
>
> Bob
>
> --- In lpc2000@yahoogroups.com, "Gennady Palitsky" <gennadyp@j...>
wrote:
> > Thanks Bob,
> >
> > > Hi,
> > >
> > > the LPC2148 (LPC2138 with USB) has fast I/O. In an assemler
test
> > > program we were able to switch the ports with a frequency of
CPU/4,
> > > ergo 15 MHz.
> > >
> >
> > I believe it's not the actual IO toggle speed, but moving of data
> from from
> > flash to IO (VPB related?) that took extra cycles on 'before
2148' > > controllers. Loading consecutive data from flash and storing at a > port took > > 10 cycles. > > Is this changed on the 2148? > > > > Gennady
2005-08-16 by Karl Olsen
--- In lpc2000@yahoogroups.com, "Randy Ott" <k5hj@q...> wrote: > I see now difference between the LPC2138 and 2148 in I/O speed. I > have a piece of code that toggles an I/O pin to write to an > external FPGA. The time to set then clear this pin is exactly the > same with the 2148 as it was with the 2138. > > This is a listing of the complied code: > // Toggle WE pin > \ 00000048 4004A0E3 MOV R0,#+0x40000000 > \ 0000004C 000083E5 STR R0,[R3, #+0] > 105 FPGA_WE_IOCLR = FPGA_WE_BIT; > \ 00000050 080083E5 STR R0,[R3, #+0x8] > > There are 2 STR instructions in a row to do the set/reset. As I > said, no difference in speed with the 2148. > > Also, does anyone know where the 8k block of RAM for USB DMA is > located in the memory map? I would like to use this for general > purpose storage. Just guessing, I haven't seen a User Manual for LPC214x. Since the GPIOs are now accessible through the fast memory bus, they may well be somewhere else in the memory map than the normal VPB peripherals. And the speeds you are seeing could be because there exists a set of "compatibility" GPIO registers at their old VPB addresses, with their old VPB speeds. An LPC214x User Manual, philips_apps? Karl Olsen
2005-08-16 by Randy Ott
--- In lpc2000@yahoogroups.com, "Karl Olsen" <kro@p...> wrote: > --- In lpc2000@yahoogroups.com, "Randy Ott" <k5hj@q...> wrote: > > I see now difference between the LPC2138 and 2148 in I/O speed. I > > have a piece of code that toggles an I/O pin to write to an > > external FPGA. The time to set then clear this pin is exactly the > > same with the 2148 as it was with the 2138. > > > > This is a listing of the complied code: > > > // Toggle WE pin > > \ 00000048 4004A0E3 MOV R0,#+0x40000000 > > \ 0000004C 000083E5 STR R0,[R3, #+0] > > 105 FPGA_WE_IOCLR = FPGA_WE_BIT; > > \ 00000050 080083E5 STR R0,[R3, #+0x8] > > > > There are 2 STR instructions in a row to do the set/reset. As I > > said, no difference in speed with the 2148. > > > > Also, does anyone know where the 8k block of RAM for USB DMA is > > located in the memory map? I would like to use this for general > > purpose storage. > > Just guessing, I haven't seen a User Manual for LPC214x. Since the > GPIOs are now accessible through the fast memory bus, they may well > be somewhere else in the memory map than the normal VPB peripherals. > And the speeds you are seeing could be because there exists a set > of "compatibility" GPIO registers at their old VPB addresses, with > their old VPB speeds. > An LPC214x User Manual, philips_apps? > > Karl Olsen Good idea Karl. I'm afraid I'll be old and gray before the user's manual is available. I have a product that will go into production soon and it would be nice to design in the 2148. Randy Ott
2005-08-17 by philips_apps
Hello Randy, Karl and other LPC2000 fans, The most current revision of the LPC214x User Manual has been uploaded into the files section of this forum (UM10139_1.ZIP). It will take several days for this file to be available for download from the official Philips website. Since this is quite a big one (original size 10MB, zipped 3.8MB) we would remove it from Yahoo files later so that other content can be posted. In this document you will find full description of the Fast GPIOs, enhanced AD features (i.e. dedicated result registers for every input), UART improvements (fractional baud rate generators, autobauding, full hardware implementation of the CTS/RTS flow control) and of course the USB device chapter. Enjoy! Regards, Philips Apps Team --- In lpc2000@yahoogroups.com, "Randy Ott" <k5hj@q...> wrote: > --- In lpc2000@yahoogroups.com, "Karl Olsen" <kro@p...> wrote: > > --- In lpc2000@yahoogroups.com, "Randy Ott" <k5hj@q...> wrote: > > > I see now difference between the LPC2138 and 2148 in I/O speed. > I > > > have a piece of code that toggles an I/O pin to write to an > > > external FPGA. The time to set then clear this pin is exactly > the > > > same with the 2148 as it was with the 2138. > > > > > > This is a listing of the complied code: > > > > > // Toggle WE pin > > > \ 00000048 4004A0E3 MOV R0,#+0x40000000 > > > \ 0000004C 000083E5 STR R0,[R3, #+0] > > > 105 FPGA_WE_IOCLR = FPGA_WE_BIT; > > > \ 00000050 080083E5 STR R0,[R3, #+0x8] > > > > > > There are 2 STR instructions in a row to do the set/reset. As I > > > said, no difference in speed with the 2148. > > > > > > Also, does anyone know where the 8k block of RAM for USB DMA is > > > located in the memory map? I would like to use this for general > > > purpose storage. > > > > Just guessing, I haven't seen a User Manual for LPC214x. Since > the > > GPIOs are now accessible through the fast memory bus, they may > well > > be somewhere else in the memory map than the normal VPB > peripherals. > > And the speeds you are seeing could be because there exists a set > > of "compatibility" GPIO registers at their old VPB addresses, with
> > their old VPB speeds. > > An LPC214x User Manual, philips_apps? > > > > Karl Olsen > > Good idea Karl. I'm afraid I'll be old and gray before the user's > manual is available. > > I have a product that will go into production soon and it would be > nice to design in the 2148. > > Randy Ott
2005-08-18 by SANDEEP BAKSHI
I am not able to Download "UM10139_1.ZIP" file from fourm ... need help ... sandeep bakshi From: "philips_apps" <philips_apps@...> Reply-To: lpc2000@yahoogroups.com To: lpc2000@yahoogroups.com Subject: [lpc2000] Re: fast io philips ? Date: Wed, 17 Aug 2005 16:13:44 -0000 Hello Randy, Karl and other LPC2000 fans, The most current revision of the LPC214x User Manual has been uploaded into the files section of this forum (UM10139_1.ZIP). It will take several days for this file to be available for download from the official Philips website. Since this is quite a big one (original size 10MB, zipped 3.8MB) we would remove it from Yahoo files later so that other content can be posted. In this document you will find full description of the Fast GPIOs, enhanced AD features (i.e. dedicated result registers for every input), UART improvements (fractional baud rate generators, autobauding, full hardware implementation of the CTS/RTS flow control) and of course the USB device chapter. Enjoy! Regards, Philips Apps Team --- In lpc2000@yahoogroups.com, "Randy Ott" <k5hj@q...> wrote: > --- In lpc2000@yahoogroups.com, "Karl Olsen" <kro@p...> wrote: > > --- In lpc2000@yahoogroups.com, "Randy Ott" <k5hj@q...> wrote: > > > I see now difference between the LPC2138 and 2148 in I/O speed. > I > > > have a piece of code that toggles an I/O pin to write to an > > > external FPGA. The time to set then clear this pin is exactly > the > > > same with the 2148 as it was with the 2138. > > > > > > This is a listing of the complied code: > > > > > // Toggle WE pin > > > \ 00000048 4004A0E3 MOV R0,#+0x40000000 > > > \ 0000004C 000083E5 STR R0,[R3, #+0] > > > 105 FPGA_WE_IOCLR = FPGA_WE_BIT; > > > \ 00000050 080083E5 STR R0,[R3, #+0x8] > > > > > > There are 2 STR instructions in a row to do the set/reset. As I > > > said, no difference in speed with the 2148. > > > > > > Also, does anyone know where the 8k block of RAM for USB DMA is > > > located in the memory map? I would like to use this for general > > > purpose storage. > > > > Just guessing, I haven't seen a User Manual for LPC214x. Since > the > > GPIOs are now accessible through the fast memory bus, they may > well > > be somewhere else in the memory map than the normal VPB > peripherals. > > And the speeds you are seeing could be because there exists a set > > of "compatibility" GPIO registers at their old VPB addresses, with
> > their old VPB speeds. > > An LPC214x User Manual, philips_apps? > > > > Karl Olsen > > Good idea Karl. I'm afraid I'll be old and gray before the user's > manual is available. > > I have a product that will go into production soon and it would be > nice to design in the 2148. > > Randy Ott
2005-08-18 by Leon Heller
----- Original Message -----
From: "SANDEEP BAKSHI" <bakshi_sandeep@...> To: <lpc2000@yahoogroups.com> Sent: Thursday, August 18, 2005 8:34 AM Subject: RE: [lpc2000] Re: fast io philips ? >I am not able to Download "UM10139_1.ZIP" file from fourm ... > need help ... I just downloaded it OK. What exactly is the problem you are having? Leon -- Leon Heller, G1HSM leon.heller@... http://www.geocities.com/leon_heller -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.338 / Virus Database: 267.10.12/75 - Release Date: 17/08/2005 --- [This E-mail has been scanned for viruses but it is your responsibility to maintain up to date anti virus software on the device that you are currently using to read this email. ]
2005-08-18 by Uwe Arends
----- Original Message -----
From: "Leon Heller" <leon.heller@...> > ----- Original Message ----- > From: "SANDEEP BAKSHI" <bakshi_sandeep@...> > > >I am not able to Download "UM10139_1.ZIP" file from fourm ... > > need help ... > > I just downloaded it OK. What exactly is the problem you are having? <quote> Document Unavailable The document you requested is temporarily unavailable because this group has exceeded its download limit. Please try again later. </quote> I guess, this was or better said _is_ the Problem -uwe
2005-08-18 by SANDEEP BAKSHI
Leon, I am succeeded to download it. Sandeep
From: "Leon Heller" <leon.heller@...> Reply-To: lpc2000@yahoogroups.com To: <lpc2000@yahoogroups.com> Subject: Re: [lpc2000] Re: fast io philips ? Date: Thu, 18 Aug 2005 09:23:02 +0100 ----- Original Message ----- From: "SANDEEP BAKSHI" <bakshi_sandeep@...> To: <lpc2000@yahoogroups.com> Sent: Thursday, August 18, 2005 8:34 AM Subject: RE: [lpc2000] Re: fast io philips ? >I am not able to Download "UM10139_1.ZIP" file from fourm ... > need help ... I just downloaded it OK. What exactly is the problem you are having? Leon -- Leon Heller, G1HSM leon.heller@... http://www.geocities.com/leon_heller -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.338 / Virus Database: 267.10.12/75 - Release Date: 17/08/2005 --- [This E-mail has been scanned for viruses but it is your responsibility to maintain up to date anti virus software on the device that you are currently using to read this email. ]
2005-08-18 by Randy Ott
--- In lpc2000@yahoogroups.com, "philips_apps" <philips_apps@y...> wrote: > Hello Randy, Karl and other LPC2000 fans, > > The most current revision of the LPC214x User Manual has been > uploaded into the files section of this forum (UM10139_1.ZIP). It > will take several days for this file to be available for download > from the official Philips website. Since this is quite a big one > (original size 10MB, zipped 3.8MB) we would remove it from Yahoo > files later so that other content can be posted. > > In this document you will find full description of the Fast GPIOs, > enhanced AD features (i.e. dedicated result registers for every > input), UART improvements (fractional baud rate generators, > autobauding, full hardware implementation of the CTS/RTS flow > control) and of course the USB device chapter. Enjoy! > > Regards, > > Philips Apps Team Thanks Philips Apps. Yep it's faster. Looks like I can really speed things up with the port masking and byte addressable access. Randy Ott