|
one time i soldered an atx 24 pin molex to a PCIE socket to try and power a piece of hardware without needing to shove it in a case. it didnt work.
|
#
¿
Nov 25, 2014 22:56
|
|
|
|
| # ¿ Apr 29, 2024 14:49 |
|
|
i do poo poo with bad old powerpc cpus at work and i need to write up like the entire boot process for a thing. In general, when the power is switched on how does a cpu like this know where in flash to look for the bootloader?
|
|
#
¿
Dec 1, 2014 19:07
|
|
|
today i started writing code for USB communication on a microcontroller. i have to write to raw rear end registers and poo poo. its dope.
|
|
#
¿
Dec 5, 2014 00:41
|
|
|
Mr Dog posted:bigass usb post dope post. the chip i've been working with the last few days is slightly different though. There's no DMA. There's two registers I have direct access to (UADDR, UDATA) and then several other registers (most of which are bitfields for enabling/checking for interrupts on things like "a packet is ready in EP3-IN") which I can access through those two. Then i can read packets a byte at a time by (for example) setting UADDR to 'read bit' bitwise and the usb register number for the EP0-out buffer, waiting for the ready bit on UADDR to be set, and then reading UDATA to get my byte. Repeat 8 times for the whole setup packet. The chip has 2 IN endpoints, 1 OUT endpoint and ep0. So far I've copied a bunch of example code from a the manual that makes the chip identify itself as a keyboard. I tried to adapt the code to make it easier to change into what i need (not a keyboard), and now it fucks up about 50% of the time (watching dmesg on the laptop I plug it into says it isn't sending the device descriptor or something). kinda weird that it sometimes works. maybe I slowed it down too much and it's timing out? god i hope not. Illusive Fuck Man fucked around with this message at 05:12 on Dec 6, 2014 |
|
#
¿
Dec 6, 2014 05:09
|
|