Re: [lpc2000] Re: decent reset device
2005-02-08 by Peter Jakacki
... Yes, I always use a resistive pulldown for that very reason, but why do worry about how high a resistance? Granted, I usually use between 10K and 100K
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Re: olimex LPC-E2294 with ethernet
2005-02-08 by Gus
As far as I understand, this is imposibble on the olimex board because of the SBHE# pin. If I am wrong, please correct me. why olimex is not responding to this
RE: [lpc2000] Re: UART 0 problem in LPC2106
2005-02-08 by Srinivas
Gus, The board is from MPE. You can get the board details what I am using this link.. http://www.mpeltd.demon.co.uk/usbstamp.htm I have already posted my
Re: [lpc2000] Re: decent reset device
2005-02-08 by Robert Adsett
... ... But to how low a voltage do they operate. A good reset chip will provide a low output down to about 0.8V. It would be a real problem if the 8
LPC2129 - Program counter
2005-02-08 by achterbahn24
Hi, I have problems with my self designed board. If I want to download my application (tested with Keil MC 2100 Board) the programm counter does not start at
Re: [lpc2000] Re: olimex LPC-E2294 with ethernet
2005-02-08 by 42Bastian Schick
... AFAIK, the cs8900a starts in 8bit mode, and has to be switched to 16bit mode. But did read this only in a Phytec manual for the mpc565. -- 42Bastian Schick
Re: decent reset device
2005-02-08 by maestral64
This is definitely very interesting idea I heard some time ago. I am considering that as well. There is also 68HC908 which is automotive approved. Only
Re: [lpc2000] JTAG question
2005-02-08 by Leon Heller
... From: jan_c_weber To: Sent: Tuesday, February 08, 2005 1:23 PM Subject: [lpc2000] JTAG question ...
Re: decent reset device
2005-02-08 by maestral64
Charles, Reset threshold for that device is 2.93V for 3.3V(as standard for TI supervisors)which is too low for ARM processors (3.0V min). I am not sure about
Re: UART 0 problem in LPC2106
2005-02-08 by Gus
Srinivas, Like I told you on chat! you have many things that can go wrong. 1) freq. multiplier/divider 2) power enable fro UART 3) pin configuration 4) your
RE: [lpc2000] Re: olimex LPC-E2294 with ethernet
2005-02-08 by Paul Curtis
Gus, ... The negative things? The fact you need to intertwine the application with the stack; no socket interface; only one packet in flight at any one time;
Re: olimex LPC-E2294 with ethernet
2005-02-08 by Gus
I got it to work last night. The problem is that olimex board has the chip connected to 16-bit data bus but it will NOT work. It works in 8-bit mode only. What
Re: decent reset device
2005-02-08 by maestral64
... Well, I found something that looks like perfect solution (and I am always concerned when I think something is perfect) - TPS70751 and TPS70851. 5V to 3.3V
Re: decent reset device
2005-02-08 by jan_c_weber
... stock, ... reset ... lead ... How about the Texas Instruments TPS383x (x = 6, 7, 8) series? HTH, Jan
JTAG question
2005-02-08 by jan_c_weber
Hi Folks, sorry for this newbie question, but I wonder what the /TRST pin on the JTAG connector is good for as the wiggler devices I ve seen here do not
Re: UART 0 problem in LPC2106
2005-02-08 by mannem_sri
... ( UART 0 ). ... set the baud rate as 9600. ... program. ... where i am doing mistake. ... The source code : *********************************************
UART 0 problem in LPC2106
2005-02-08 by Srinivasa Reddy Mannem
Hi, I am working LPC2106 target board. I am trying to write some data to hyper terminal using serial port ( UART 0 ). But i couldn t get that. The crystal
Re: [lpc2000] Disabling interrupts from Thumb mode
2005-02-08 by 42Bastian Schick
... This code does not work, you destroy lr ! This works: @ int di(); .thumb di: bx pc nop .arm di_arm: mrs r0,cpsr orr r1,r0,#0xc0 msr cpsr_c,r1 bx lr .thumb
Re: CAN timing again
2005-02-08 by embeddedjanitor
... According to the CAN spec there are actually 4 parts to the bit period. * Sync seg: always 1 tq. Edges are expected here. * Prog seg: compensates for
Re: [lpc2000] Disabling interrupts from Thumb mode
2005-02-08 by Charles Manning
The hassle with this is that Thumb mode does not support the MRS and MSR instructions. You need to change mode to ARM mode to get these. Even if you generate
Disabling interrupts from Thumb mode
2005-02-08 by Richard
Keil does seem to support ARM/thumb interworking. I have added a source file which produces ARM code to the project, the rest of which is in thumb mode. I
Re: [lpc2000] Re: decent reset device
2005-02-08 by Peter Jakacki
... Shouldn t this have been a new thread??? The problem with reset chips is that they are overly expensive (why?) and customized. I find it cheaper to employ
RE: [lpc2000] Re: olimex LPC-E2294 with ethernet
2005-02-07 by Paul Curtis
Hi Gus, ... Looks fine; I guess the next step is to scope the waveforms arriving at the CS8900A. -- Paul Curtis, Rowley Associates Ltd http://www.rowley.co.uk
Re: CrossStudio: C++ interrupt service
2005-02-07 by fl429
A guy from Rowley helped me figured it out. It turns out that I have to uncomment the line #define VECTORED_IRQ_INTERRUPTS in the startup.s file. In the sample
ARM/Thumb Mode Interworking in Keil
2005-02-07 by Richard
I am using the macros: #define IENABLE /* Nested Interrupts Entry */ __asm { MRS LR, SPSR } /* Copy SPSR_irq to LR */
Re: [lpc2000] watchdog
2005-02-07 by Robert Adsett
... The feed register is a write only register. You cannot (should not?) read it. ... Also the two writes to the feed register MUST be back to back write
Re: cant seem to use external sdram on phytec 2294
2005-02-07 by leon_heller
... you. Amontec gave me a Chameleon to try with my LPC2106 hardware, but I couldn t get it to work properly. Did you have any problems? Leon
Re: [lpc2000] olimex LPC-E2294 with ethernet
2005-02-07 by Anton Erasmus
... They qualify the IOR and IOW signals with CS2, hence one will only read from, write to the chip when CS2 is active. They probably could have achived the
Re: cant seem to use external sdram on phytec 2294
2005-02-07 by wunny83
Thank you for your help, I hadn t included LDR R0, =PINSEL2 LDR R1, =PINSEL2_Val STR R1, [R0] in my startup file so PINSEL2 register was never
Re: olimex LPC-E2294 with ethernet
2005-02-07 by Gus
Paul, ... I didn t see that LOL!! But why olimex did that anyways? weard! ... I removed the changes and trying to use this one unmodefied void
Re: memory protect on LPC22xx
2005-02-07 by lpc2100_fan
Hi Gus, I think they are disabled. In the User s Manual which can be found here:
RE: [lpc2000] CrossStudio: C++ interrupt service
2005-02-07 by Paul Curtis
Perhaps you need extern C magic? extern C { static void timer0ISR(void) __attribute__ ((interrupt ( IRQ ))); }; Dunno. I m not an ARM person. -- Paul
CrossStudio: C++ interrupt service
2005-02-07 by fl429
Hi, folks, I am trying out a few things on a IAR Kickstart board, with CrossStudio 1.3. I d like to write code in C++ instead of C. My test C++ code ran ok
RE: [lpc2000] Re: olimex LPC-E2294 with ethernet
2005-02-07 by Paul Curtis
Gus, ... IOR and IOW are gated using CS2 (look down by the copyright symbol) hence even though CHIPSEL is always selected, you won t get an IOR or IOW strobe
Re: olimex LPC-E2294 with ethernet
2005-02-07 by Gus
Paul, ... Yes that is correct but we have FLASH and RAM on the bus!!! when RD is strobed for RAM read, the ethernet chip will access the data bus. I could be
RE: [lpc2000] Re: olimex LPC-E2294 with ethernet
2005-02-07 by Paul Curtis
Gus, ... For register reads, I believe that is really doesn t matter that the chip is always selected using /CHIPSEL as it will only present or latch data on
Re: olimex LPC-E2294 with ethernet
2005-02-07 by Gus
I sm actually starting out with your code. The major work here is that, in this case, the ethernat chip is connected to the external bus as 16-bit. So, I have
Re: WDT feed
2005-02-07 by Mark Butcher
When I first started with the LPC210x and Watchdog my board would sporadically crash - mainly then when I was dumping data to the serial port (lots of SCI
RE: [lpc2000] olimex LPC-E2294 with ethernet
2005-02-07 by Paul Curtis
Gus, I ported uIP to the E2124 and it works on that part, but that s in polled mode. I don t have a port of uIP for that board as I don t have the board. If
memory protect on LPC22xx
2005-02-07 by Gus
Hello, How memory protect is usefull on LPC22xx!!! Shouldn t memory protect disable the BOOT pins? Anyone can boot from external FLASH with simple software to
olimex LPC-E2294 with ethernet
2005-02-07 by Gus
Hello, I spent all weekend trying to get the ethernet to work on olimex LPC- E2294 board http://www.olimex.com/dev/lpc-e2294.html with no luck Looking at the
memory protect on LPC22xx
2005-02-07 by Gus
Hello, How memory protect is usefull on LPC22xx parts? I see it useless! Anyone can change the BOOT pins to make the chip start from external FLASH to copy the
Re: decent reset device
2005-02-07 by charlesgrenz
Miodrag, Try a Texas Instruments TPS3306-20-Q1. It resets with a 100ms pulse. There are also other versions that have a reset of different values. regards,
Re: decent reset device
2005-02-07 by maestral64
... also find ON SEMI MAX809TTR. My problem is that I would like to use faster reset, with reset delay time up to 100ms. By datasheet 2114 needs min 10 ms.
Re: LPC2129 A/D FIFO and accumulator
2005-02-07 by Karl Olsen
... There is no FIFO. Conversions can be started either manually by writing to ADCR, by various MATx.x edges, or continuously in a sequence (burst mode). You
LPC2129 A/D FIFO and accumulator
2005-02-07 by Adam Wilkinson
Hi Folks, Anyone know if there is a FIFO facility available for the A/D? Reference is made to it on p240 of the LPC2119/2129/2194/2292/2294 User Manual, bit 30
Re: cant seem to use external sdram on phytec 2294
2005-02-07 by didier_edna
Hello, I was having similar problems, trying to run code from the external RAM. We are using the IAR environment, with a Macraigor clone (chamelion from
Re: [lpc2000] cant seem to use external sdram on phytec 2294
2005-02-07 by 42Bastian Schick
Hi ... Sure. Just post it so we might have a look at it. Memory is ok ? You can write into the external RAM ? ... Thats to the vectors only. I d suggest
Problem in arm simulator of crossworks for arm
2005-02-07 by suresh_digitec
i am using evaluation version of crossworks for arm version 1.3 to compile its own example program for lpc2106(led). It compiles well and even i am able to
cant seem to use external sdram on phytec 2294
2005-02-07 by wunny83
Hi im new at this but im having trouble storing data to the adress 0x81000000, while my program will run fine if internal memory is used. Im using keil and