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Anticheat circuit?
Part number is MAX3221.
Tuesday, 8 June 2004 - 12:00
No handler for timer OCF1A interrupt causes RESET on AT90S85
With the Mega16 that I'm using right now, bit OCIE1A in register TIMSK determines if an interrupt is generated on compare. It's probably similar on your CPU. I'm not familiar with...
Tuesday, 8 June 2004 - 09:06
No handler for timer OCF1A interrupt causes RESET on AT90S85
I think you'll find that all unused interrupt vectors are initially set up as a jump to 0x0000. I also think it should be possible to mask that particular interrupt, whilst...
Tuesday, 8 June 2004 - 08:57
Anticheat circuit?
What devices are you using for RS232 to TTL conversion? Maxim have a chip (I'll look up the part number if you're interested) which provides a signal when a "valid" RS232 level is...
Tuesday, 8 June 2004 - 06:54
Nanosecond timer
What clock speed are you using? This will dictate the resolution of your timer. Currently, no AVR will let you time to a resultion of one nanosecond. Or anywhere close. A clock...
Monday, 7 June 2004 - 08:23
Atmega128 in Intel mode
Give us more info about the LCD controller, e.g. does it have on-board RAM. Or maybe the part number. I'm using Intel mode on a Samsung controller, it's marginally faster than...
Sunday, 6 June 2004 - 08:40
How to do this in c?
As far I know, your C compiler should take care of this for you. (O.K., it's not strictly the compiler, but startup code added by the compiler/linker). GCC certainly works this...
Friday, 4 June 2004 - 13:34
program space string pointer
Oranges are way better than apples.
Thursday, 3 June 2004 - 15:46
Administration of RSTACK (Return Stack)
I'm not disagreeing with you Lee, you posted your reply while I was still typing mine. Must learn to type faster.
Thursday, 3 June 2004 - 15:32
Administration of RSTACK (Return Stack)
Maybe it would be faster if you looked this up for yourself in the datasheets. :roll: I think you would find that POP and LD rd,Y+ are both 2 cycle operations, as are PUSH and ST...
Thursday, 3 June 2004 - 15:24
Administration of RSTACK (Return Stack)
My GUESS would be that you have this the wrong way round. The return address saving/restoring is part of the AVR hardware. I'd suspect that the compiler uses a separate stack for...
Thursday, 3 June 2004 - 10:22
USB 2 RS232
Bob, don't you ever sleep?
Wednesday, 2 June 2004 - 11:07