#garfield Logs

Jul 14 2022

12:22 AM rue_mohr: did a bunch of yard cleanup
12:31 AM rue_mohr: one of the printers has a flakey usb serial module
12:31 AM rue_mohr: which died in the middle of a large print
09:27 AM rue_mohr: doesn't the us have an election coming up?
02:19 PM polprog is now known as p
02:19 PM p is now known as polprog
02:21 PM polprog: spent whole day tring to resurrect a DAC
02:21 PM polprog: thing gets valid I2C on it's pins yet glitches and does not ACK
02:22 PM polprog: i have to see maybe there are some glitches or something
02:22 PM polprog: its all shoddily assembled on rasterboard
02:22 PM Tom_L: hello Mr P
02:22 PM polprog: Hello Mr T
02:25 PM polprog: what could that be
02:25 PM polprog: power OK, yet it just wont ACK it's own address
02:25 PM polprog: Im going to take a bus pirate on monday and see what is wrong
02:26 PM polprog: if it does not answer the bp when out of board, then it's blown
02:27 PM Tom_L: crappy board?
02:27 PM polprog: yeah i might have nudged it when working in the mech shop
02:27 PM polprog: i made a new one today
02:27 PM polprog: spent all day soldering it
02:27 PM polprog: ill have to take a look when i take it out
02:34 PM Tom_L: i seem to remember pullups on i2c...
02:38 PM Tom_L: is that AT24CP i2c? i can't remember now.. http://tom-itx.no-ip.biz:81/~webpage/logger/Datalogger32_mmc_sch.png
02:38 PM Tom_L: pullup on SDA
03:06 PM polprog: no, its a different DAC
03:06 PM polprog: hm, pullups
03:06 PM polprog: well, the signals arent the cleanest and the wire is pretty long (20+ cm) so ill try adding some pullups
03:11 PM Tom_L: no i was just trying to remember if tha chip was i2c...
03:11 PM Tom_L: it's been a while
06:32 PM rue_mohr: polprog, 4.7k on 5V?
06:32 PM rue_mohr: 24--xx(x) is i2c