"Hey, I wonder how Linux gets a dtb into an ELF section."
"oh. oh no."

Why do I need a Scheme interpreter installed to use autotools?

..you know what, I don't wanna know.

I went on facebook and there's still people checking in at the grocery store like it's 2010

At some point I'll probably spin my own version of this board with an STM32F4 and the ADF7021s connected to SPI ports so I don't have to bit-bang the interface.

Show thread

As an aside. The STM32F1 series is a special snowflake that's not-quite-compatible with every other STM32. I hate it.

Show thread

I think I can encapsulate this in an existing system like DMR, but it seems that the packet data spec for DMR isn't widely implemented.

Show thread

Once I can read/write control registers on the modems correctly, I'll need to figure out an on-air protocol and write some userspace code for the Pi. The goal is to have the Pi act like an IRC server that peers with other servers over RF.

Show thread

The serial interface isn't easy to get a logic analyzer on, so I ordered a STM32F103 dev kit and will hook my logic analyzer to that to make sure I'm clocking everything correctly.

Show thread

I can ping the STM32 and set registers on the modems by sending UDP packets. The ADF7021 uses an oddball serial interface that I had to bit-bang over the GPIO, so I'm not sure the timing is quite right yet.

Show thread

I needed to multiplex communication to both of the modems over the one UART and I didn't want to invent yet another serial protocol, so now I have LwIP running on the STM32 doing SLIP at 500kbaud

Show thread

I've got this dumb Raspberry Pi hat that has an STM32F103 and a couple of ADF7021 radio modems. The only connections on the Pi header are power and a UART.

@ieure having a bit of trouble getting it put back together. The top cover won't sit flat, it's almost like the keyboard is just a few millimeters too tall now. Any ideas what I might be doing wrong?

Show thread

@ieure so, I finally got around to poking at that C64 again... It seems that disassembling and reassembling it fixed whatever was wrong. The previous owner covered everything in thermal grease, my guess is that some of it was shorting a pin on the character ROM.

I get that relational databases aren't trendy right now, but data modeling is more important than how you store it.

Show thread

Observation: Nobody writes books about schema design and data management anymore. It's all "Learn SQL" and "Data Analytics with $TOOL"

Show older
Mastodon

Server run by the main developers of the project 🐘 It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!