Serial bridge to Rasberry Pi Zero
Rayman
Posts: 13,861
This is fun and maybe useful, if you have the UART pins from Raspberry Pi zero connected to P2 pins...
This simple program just relays I/O from the P2 pins where the UART is connected (P24,P25) in this case to the P2 pins connected to the FT231X USB to serial bridge (P62,P63).
With this going, you can see the Pi boot and then give it console commands.
You can use Parallax Serial Terminal, but PuttyExtra works a little better as it doesn't add a blank line in between each line.
You currently need FlexGui or Fastspin to compile this code.
This simple program just relays I/O from the P2 pins where the UART is connected (P24,P25) in this case to the P2 pins connected to the FT231X USB to serial bridge (P62,P63).
With this going, you can see the Pi boot and then give it console commands.
You can use Parallax Serial Terminal, but PuttyExtra works a little better as it doesn't add a blank line in between each line.
You currently need FlexGui or Fastspin to compile this code.
Comments
This kind of code is also useful for connecting vendor software to hardware. I did a road sign controller that uses an expensive VFD. The company provides a demo program for the standard RS-232 version, and I was using the TTL variant. No worries; I wrote code exactly like Ray has done here and used the Propeller as a bridge.
My first goal is to use the RPi as a GPU for P2.
I've toyed with OpenVG and it's not much different than FTDI's EVE2 in principle.
You start a display list, add some stuff, and then end the list and display.
Repeat as necessary.
Plan is to send commands over the SPI port.
But, UART may come in handy too, later, if want to add additional functions, such as WIFI or Bluetooth...
I've using Visual Studio to program over SSH connection in C++... It works...