Post Created date
define a vector to an ASM isr in an IAR mixed C/ASM program
Terrific, thanks mate, worked like a charm. Roger
Wednesday, 12 January 2011 - 05:02
Some advices about using elm-chan FFT
Quote:is even the fact that an 64 points fft only return 32 results is correct? Yes, when the input data are 'real' i.e. not complex values. The second 32 points of the result are...
Wednesday, 8 December 2010 - 23:07
The Appollo Guidance Computer - AGC, not AVR was overloaded... Some things never change... Roger
Wednesday, 1 December 2010 - 12:39
XPlain (XMega) Audio... Noisy?
I think there have been two or three revisions of the Xplain circuit, related to audio noise. It's in the Atmel documentation, but I can't remember where... yeah, there it is,...
Sunday, 24 October 2010 - 00:46
2 sequential function calls throw result randomly on portb
While the code in your original post is similar to your 'real' code, there are some possibly relevant differences: 1. The CASE dispatch code adds extra delays, which, combined...
Sunday, 10 October 2010 - 02:12
2 sequential function calls throw result randomly on portb
Quote:is there a piece of flat cable involved? Yes, I would like to know the physical setup. The OP says that it happens 'sometimes', which smacks of reflections/under-overshoots/...
Saturday, 9 October 2010 - 11:32
2 sequential function calls throw result randomly on portb
On the face of it, there is no reason for the effect that you are seeing. 'ls' stands for low-power schottky', not low speed, and while it is moderately slow by present standards...
Saturday, 9 October 2010 - 03:24
SPI - RTC stupid question about rx byte
I haven't followed this thread, but the 4045 uses the state (low or hi) of the SCK line at the time when CE transitions to HI to determine if the the data will be sampled/shifted...
Wednesday, 6 October 2010 - 11:31
IAR AVR compiler 4.30C, EW16847
My apologies, yes there is a separate release notes document for the compiler, and yes, there is the bald statement: "EW16847: The compiler can generate code that results in a...
Thursday, 30 September 2010 - 12:51
IAR AVR compiler 4.30C, EW16847
Is this a wind-up? What exactly would you consider a 'negative address'? Wraparound in the address space? Anyway, I just had a look at the KnownProblems.pdf for version 5.20, and...
Thursday, 30 September 2010 - 10:22
Software SPI help
Glad I could help, Paul. Roger
Friday, 17 September 2010 - 07:11
Software SPI help
Quote:while(localtemp < 7) You're not handling the 8th bit. Roger
Wednesday, 15 September 2010 - 23:29