Skip to main content ↑ ↓

Messages

This section allows you to view all Messages made by this member. Note that you can only see Messages made in areas you currently have access to.

Messages - jcr

1
AVRDude / Re: Programming an Attiny45 clocked at 32.768kHz
Ok, scratch that question. I worked around the problem by purchasing a "real" avr programmer, because it was one of those "needs to be done by yesterday" projects. But with this out of the way, I'd still like to have a BP capable of programming at variable speeds instead of set SPI rates. Which sounds like a perfectly good excuse to attempt adding an stk500 mode to the BPv4, which I'll try next ;)
2
AVRDude / Programming an Attiny45 clocked at 32.768kHz
Does anyone know of a way to slow down a Bus Pirate's programming speed to or below 4kHz, so that it'll allow me to program an Attiny45 clocked with an external 32.768kHz crystal? Preferably one that doesn't involve a massive amount of coding in either avrdude or the Bus Pirate's firmware ;)

The slowest possible SPI speed of 30kHz is way too fast for this configuration and results in the dreaded "initialization failed, rc=-2" error, but luckily with a known cause this time. I've also tried an avrdude patch I ran across that implements avr programming through the raw wire protocol (avrdude patch #7723), but this bottoms out at 5kHz and still results in failures. Since I've only got a BPv4, the stk500 firmware also doesn't seem to be an option.

Right now I have to make do with a bsd parport programmer as a workaround (with -B 250 -i 1000), but this is a big hindrance in my development process (requires unplugging, walking to a different room, etc). I'd rather use my favorite little tool.

( ! ) Fatal error: Uncaught exception 'Elk_Exception' with message 'Please try again. If you come back to this error screen, report the error to an administrator.' in /var/www/dangerousprototypes/forum/sources/database/Db-mysql.class.php on line 696
( ! ) Elk_Exception: Please try again. If you come back to this error screen, report the error to an administrator. in /var/www/dangerousprototypes/forum/sources/database/Db-mysql.class.php on line 696
Call Stack
#TimeMemoryFunctionLocation
10.01252259800session_write_close ( )...(null):0
20.01282391400ElkArte\sources\subs\SessionHandler\DatabaseHandler->write( )...(null):0
30.01282392176Database_MySQL->query( ).../DatabaseHandler.php:119
40.05832530920Database_MySQL->error( ).../Db-mysql.class.php:273