Yahoo Groups archive
Messages
Page 39 of 329 · 16407 messages matched
2006-03-26 by Alex Gibson
... Jim , I m happy to host copies of the files as have a large account with lots of spare space. Just host one society from uni and a few bits and pieces of
2006-03-26 by roger_lynx
... already. At ... the whole ... prologue/epilogue with inline ... registers are really used, so I have ... which is a wast of performance. Yes. IRQ
2006-03-25 by Robert Adsett
... According to the APCS A (called)subroutine must preserve the contents of the registers r4-r8, r10, r11 and SP . R0-R3 are temporary/parameter registers
2006-03-25 by Tom Walsh
... Ah, better licensing terms. TomW -- Tom Walsh - WN3L - Embedded Systems Consultant http://openhardware.net, http://cyberiansoftware.com Windows? No
2006-03-25 by Sten
... Wonderful! ;-) But why to save r0..r3 and ip in your irq_isr?!? Only lr will be changed by bl and registers used by irq_handler() should be saved in its
2006-03-25 by Robert Adsett
... retCode id declared as type tS8 and initialized to 0. tS8 will defined elsewhere At a guess (and only a guess), it s meant to be a mnemonic for type
2006-03-25 by Dave Hylands
Hi heedaf, ... This declares a variable called retCode using a type called tS8 and initializes it to zero. The tS8 type is probably declared somewhere like
2006-03-25 by Robert Bacs
I guess it means an 8 bits signed type. Boby ... __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best
2006-03-25 by heedaf
In the following sample code does anyone know what tS8 (tS8 retCode = 0;) do/mean? It is contained in a .h file. tS8 i2cWrite(tU8 addr, tU8 extraCmd, tU16
2006-03-25 by David Hawkins
... Then perhaps this :) irq_isr: sub lr, lr, #4 stmfd sp!, {r0-r3, ip, lr} bl irq_handler ldmfd sp!, {r0-r3, ip, pc}^ /* VICVectAddr dispatch loop */ void
2006-03-25 by Sten
... YES, something like that! ;-) But without nesting and change of cpu-mode. Sten -- /************************************************ Do you need a tiny and
2006-03-25 by Sten
... You re right, the overhead is exceptable. And it needs less clocks than my current work-around. I think, I will write a stub tomorrow! ;-) Sten --
2006-03-25 by Xtian Xultz
... I understand, but my problem is that my SPI devices are 25 cm away (in another board) from the board with my uC. So, I have two boards with SPI devices
2006-03-25 by Robert Adsett
... As a matter of fact, yes. That would be a stub. ... That would also be a stub. I don t see any reason off hand not to do it that way although I also
2006-03-25 by David Hawkins
... You mean something like this .... irq_isr: /* Save IRQ context, including the APCS registers, and r4-6 */ sub lr, lr, #4 stmfd sp!, {r0-r6, ip, lr} /*
2006-03-25 by Joel Winarske
Hi Alex, In addition to Tom s info this is a good reference: http://billgatliff.com/drupal/node/25 Also the Ethernut project has a good number of examples for
2006-03-25 by Sten
... Hello Marko, do you still know where you to find these patches? I would take a look into, because I started to search the gcc sources for the root of this
2006-03-25 by Sten
... Ok, what exactly did you mean by a stub ? You write a piece of assembler code for a particular IRQ and then branch to your (normal) C service function,
2006-03-25 by philips_apps
Clemens, it is microamps, you are absolutley right. My apologies. At least this one is rather obvious. Robert ...
2006-03-25 by Robert Adsett
... If you write a stub that problem disappears. The procedure call standard ensures that the proper registers are saved when you call out of the stub. You
2006-03-25 by Sten
... Thanks Robert. At the moment I declare my IRQ functions as naked and write my own prologue/epilogue with inline assembler. But it is less efficient
2006-03-25 by Sten
... Ok, that s the reason! I explored that it happens only in conjunction with optimization options. It seems that gcc is mixing up optimized code with
2006-03-25 by Robert Adsett
... Rather than go through all this hand-wringing why not just write an assembly stub? You d know it was correct and you d be done already. At most it would
2006-03-25 by Bertrik Sikken
... Indeed, windows xp offers FAT32 as default for my 256MB SD-card and 128MB flash drive when formatting, but I have no doubt that linux can also format them
2006-03-25 by Sten
... I ve tried this. But entry/exit is still not correct. Here s the result: void uart_irqHandler0(void) __attribute__((interrupt)); 00000204
2006-03-25 by clemens fischer
... http://www.standardics.philips.com/support/faq/microcontrollers/lpc2000/peripherals/ Q Can the internal pull-up resistors on port pins be disabled? A No,
2006-03-25 by Tom Walsh
... No, I don t. AFAIK, the apcs frame is used for backtracing code. So far, the Insight debugger has been fine for backtracing with the options I specify
2006-03-25 by Tom Walsh
... I don t use: void someISR (void) __attribute__((interrupt( IRQ ))); I declare as: void someISR (void) __attribute__((interrupt)); Entry / exit code is
2006-03-25 by fordp2002
50% duty cycle is a special case that is super easy to produce. Heres how to do it. 1) Choose a Timer any timer. 2) Program a Match register to a suitable
2006-03-25 by Sten
... With -mapcs-frame the code produced looks good but due to the APCS a lot of overhead at entry and exit of my functions is generated. Without that option
2006-03-25 by Tom Walsh
... Yes, it only supports 12/16 bit FATs. As far as I know, the only way you can get a Compact Flash or SD card with 32bit FATs is to format them under
2006-03-25 by Tom Walsh
... I use newlib, it drives the RDCF2 FAT filesystem for the SD card, and newlib functions are used extensively throughout the code: memcpy, strncmp, etc. I
2006-03-25 by Tom Walsh
... I am not sure what your question is. Why do you feel you have to intentionally suppress the apcs stack frame? Regards, TomW -- Tom Walsh - WN3L - Embedded
2006-03-25 by balaji cr
I am planning to do the same. It is really sad that this forum occasionally generates SPAM. Balaji ... === message truncated === Dream is just a dream. A goal
2006-03-25 by Michael Rubitschka
Hi George ... This process is called plonk! It is used in newsgroups to tell a troll, that his threads are now directed to the trashcan. It is an acronym for
2006-03-25 by Sten
Hello Tom, some days ago I discovered a GCC bug on interrupt service routines for functions with __attribute__((interrupt( IRQ ))). At GCC-Bugzilla I found
2006-03-25 by George M. Gallant, Jr.
Jayasooriah, Congratulations. You are the first person I have ever created a filter to automatically route all email from directly to the trash bin! I won t
2006-03-25 by Saravanakumar S
Hi all, I am newbie to this field .Can you please help me to come out of this problem. I modify the pgm, to generate the 100KHz frequency with 50% duty cycle
2006-03-25 by Jayasooriah
Hello, For what it is worth, here is a summary of the issues surrounding the very first question I raised relating to spurious interrupts on LPC 2000 family.
2006-03-25 by Thiadmer Riemersma (ITB CompuPhase)
Hello Robert, ... Thanks for the tip. Another hypothesis that I want to investigate is whether we may be operating the LPC2138 under off spec conditions.
2006-03-25 by Leon Heller
... From: jk jlkj To: LPC 2000 Sent: Saturday, March 25, 2006 12:03 PM Subject: [lpc2000] JTAG problem ...
2006-03-25 by Seb Tarris
Hi, Do you use the IAR compiler v4.30A ? So yes, there is a problem with the UBROF8 debug format, and you must install the IAR patch Xlink 4.59 or more.
2006-03-25 by jk jlkj
Hi Friends, Any one knows what this JTAG error means. The debug session could not be started. Either the debugger intialization failed, or else the file
2006-03-25 by nospam@FreeRTOS.org
... Yes. ... Naturally. The only purpose of this was for my own amusment, to see if the interrupt was called frequently or rarely/erratically. I was not
2006-03-25 by Mukund Deshmukh
... We are using MMC with LPC2138 and efsl for playing raw audio data. The quality of sound at 8bit, 8000 samples is too good. With 10 bit , and at higher
2006-03-25 by Pandurang Shinde
hi, thanks for suuggestion,i check my initlization & i nowhere found that i am writing one reserved bit. My RTC initlization routine is as below. CCR=0x13; /*
2006-03-25 by brendanmurphy37
Richard, I know I said I wouldn t post anything else on this topic, but please bear with me on the following: I hope you ll understand why. From your statement
2006-03-24 by ian.scanlon
That doesn t make any sense. Think, THEN type. ... Ralph ... one ... vested ... this ... http://au.messenger.yahoo.com
2006-03-24 by Jayasooriah
Hah! I wonder who is saving face here. Did you not also jump on Ralph Hempel bandwagon. Remember, the flawed one? It just goes on to show that it does not
2006-03-24 by Jayasooriah