New project, litehm2: a hostmot2 port to linsn rv901t

I do not know much about Smartserial. I rewrote the LPB-code that runs on the mesa ethernet cards in C. Isn't there already code in the hostmod driver that talks LPB over serial?

Hi,sensille，I am not an electrical engineer.
I saw the link github.com/sensille/litehm2 & github.com/q3k/chubby75/issues/85 .
If I without any modifications to the RV901T, I will 24 output& 64 input ?
(Buffers
All I/O Buffers are powered by the 3.3V to 5.5V power supply.

Buffers U600 to U607 have a direction pin at F13. )
Can any one tell me where is F13?

Regarding issue 85: To be honest I haven't thought about if it might be a problem to run the ports as inputs. I just assumed it works because the board is designed that way. It still works without problems.

24 Input/ 64 Output: Yes, although I'm not sure that really all I/O is available on the 2 large headers.

F13 is an FPGA pin. My firmware currently switches it to input, but that is easily changed.

Thanks for your help,sensille。
About one and half moons ago, I got a emddebed board（rockchip rk3399）& make preempt_rt kernel （debian/ ubuntu），latency tset about 40-80 us。And then, I found your about rv901t github link .I found your plan better than collorlight.So, I bought a rv901t. I want to use your plan .Can you write in more detail about readme.txt? It's best to step by step.because now it's to hard for anyone except electrical engineer.

Great Project.
How much trubble can be to add more cards like one i have in stock 5A-75E??

Can you specify a bit more which parts you have trouble with? Building the firmware is still a bit involved, but I can provide you with a bitstream once you specify which functions you need.

From the hardware side there are 3 main hurdles:
1) Changing some drivers from input to output (optional)
2) Getting the initial firmware flashed
3) Building a breakout board.

I would suggest you start with 2). Once you get that running you have a baseline to build upon.