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reading atari pot, not getting linear
I'm using a 555 timer to read an atari paddle. I get a vary radical exponential reading. Like 12:0 to 9:00 is a difference of 300us, 9:00 to 6 is 100us, and 6:00 to 3 is 50us. I...
Wednesday, 27 January 2010 - 04:15
an invention
I was not really sure where to ask this but I figure a few of the members here may have done this. I have designed a USB device I'm working on producing in large volume. My...
Tuesday, 22 December 2009 - 18:06
Error: illegal opcode jmp for mcu atmega8
really? Is there another way to jump with 3 ticks? sbic PINx,SCKA jmp analog_nextBit jmp analog_nextBit I guess this is the same.. but its read in at the wrong time.. nop...
Friday, 27 November 2009 - 16:08
ASM questsion.
I have this sbic PINx,PIN5;( skip if 0 ) 1 or 2 rjmp nextBit; 2 rjmp nextBit; 2 nextBit: sbic PINx,PIN4 sec st X+,r18 clr r18 rol r18 This gives me 4 or 5 clocks before...
Saturday, 24 October 2009 - 15:38
need a little bit of help with sbic
I have never really had trouble using skip conditionals before but I'm really confused here.. I have PINx defined as PORTC and PIN5 as 5. As I understand it, it will do the debug...
Friday, 23 October 2009 - 17:58
help with asm and a global var.
I didn't think this was going to be as tricky as its is for me. But I just want to set a variable to zero. I have it declared in my S files as .extern rejected ans tried a few...
Thursday, 22 October 2009 - 20:51
how to properly shut of SPCR ?
I'm using the SPCR like so. SPCR = (1<<SPE)|(1<<MSTR)|(1<<SPR1)|(1<<SPR0)|(1<<DORD)|(1<<CPHA)|(1<<CPOL) I only want to use it if a...
Sunday, 18 October 2009 - 03:24
burning troubles, need some help.
I have now 8 bad atmega 168 chips, I never had this trouble with 8's but 168 seem to be a pain for me.. At any rate It seems my fuse byte were off and before I knew that was the...
Sunday, 18 October 2009 - 02:23
usb programmers, where to get a PID?
Hi, if anyone can help me I would appreciate it. I need to buy a PID for my usb device. I dont need many, just one or two.. I tried this site many times. http://www.mcselec.com/...
Thursday, 15 October 2009 - 22:17
chips that go bad durring burning.
Hi, I had a problem during the burning proses where a device attached to portB was pulling some leads low. Normally I dont have issue with that but in this case it lock two chips...
Thursday, 17 September 2009 - 19:57
strange Port problem with my atmeg chip.
Ok I have a problem that is electronically affecting port B and C of my atmeg168. I cannot find any rhyme or reason to this and I hope talking about it helps me resolve it as I'm...
Tuesday, 8 September 2009 - 22:23
ranch op code?
Is there an o-code to branch (br) that will work like an BRNE with out the test? I need this in one clock, not RJMP that takes two.
Thursday, 3 September 2009 - 18:54