I am using an LPC2368 running at 60MHz. I am trying to respond to an external interrupt as fast as possible. I am using FIQ for the external interrupt only...
... an ... high, ... How many instructions between the FIQ vector and the instruction to the o/p? Are these in internal flash? Are the stacks in internal SRAM?...
Hi All, I downloaded the Keil USB Examples for the MCB2300 board on their website. All examples worked well (except USBMem, because of the 16 kb limit for the ...
... an ... high, ... As some suggestions for reducing latency: 1. Never disable FIQs. This won't improve the best-case performance, but it will reduce jitter. ...
Hello i have just started working wit LPC2294, I am using Keil Compiler and have made a small circuit for ISP as given in application note AN10302. I have...
Check if you have correct exeption vectors table and its checksum. If this doesn't help. Get a working example try it and start from there. ruchika suneja...
I am looking for some ideas on driverless USB serial possibilities. Some time ago I discovered the USB CDC ACM and at first thought this was a great solution,...
... The fast output is the only instruction in my FIQ routine. I am using internal flash with my stacks in internal SRAM and MAM is fully enabled. Vern...
... Thanks for the tips Brendan. I will try your second and third suggestions, but I have situations where I have to disable the FIQ. Thank you for your time,...
Another USB question, regarding USB mass storage. On CD-ROMs on windows you have the autorun which can launch a windows application. I would like to create a...
... to ... FIQs. I ... latency ... performance, ... right ... will ... saves ... FIQ. ... It should be possible to arrange that you never disable the FIQ. The...
Hi, I'm in need of the printf function in my current project based on the LPC2103. However if I try to link in Newlib, it simply won't fit, as the LPC2103...
... There's plenty of printf's out there - try a little searching. Not sure what you mean about re-writing va_start etc., as these are typically built-into the...
Try http://www.menie.org/georges/embedded/index.html The code is nice and small. Regards, Sergio ... [Non-text portions of this message have been removed]...
I think the only way to improve performance anymore is to move the actual FIQ routine into SRAM. Though I am thinking this only get me a couple cycles because...
Hi All, After some major hair loss, I found the solution to my problem (actually, I found a message in this forum I did not find before in my searches): GCC...
I am stuck. I need help setting up the vectors and the stack areas for a LPC2138. I am using the Green Hill tools. I am not sure how to call up _start...
Greetings lpc2000 Members: I am able to view the contents of FLASH, RAM and peripheral registers via Eclipse/OpenOCD/GDB ViewMemory tab OK but when I try to...
Thanks to everybody for help. We went to a conclusion that this is an electrical failure. Unfortunately, due to shortage of 2368/2378 CPUs, there is a...
... Thanks, that did the trick. Added ~7kb total (needed libgcc for % and /= functions for integer->ascii) which is still a bit much, however I think I can...
Hi all, I like to check that serial HW handshaking is correctly working with my LPC2136 (UART1), can anyone advise a tool (freeware/shareware) that can help me...
Hi, Is there any good explanation on the CGU in LPC2888 ? how to program it ? I read the user manual, but I got lost with all the registers... I want to set...
hello doug, ... just implement a fat/vfat file system, using ausb mass storage class. then you put a file in that system called "autorun.inf". it can be on the...
... I don;t quite understand when you say "I won;t be using MAM at interrupt time". Typically, the MAM is set up once on itialisation, and left. You'll see...
I do not think there any! And the way CC works on windows makes it run very slow. Plus you still have to "install" driver on windows for CDC devices!!! Not on...
you can do teh autorun on any drive. forget CD-ROM as it would be too much work....just make a drive with FAT and use teh autorun.inf like the other poster...
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