[Oberon] FPGA - nRF24L01 `RPI Net' server

Tomas Kral thomas.kral at email.cz
Sun May 27 11:01:48 CEST 2018

On Fri, 25 May 2018 22:05:46 +0200
Tomas Kral <thomas.kral at email.cz> wrote:

> I will look in the Ch.10 and try to time some of the
> protocol parts, as suggested.

I really need to reread Ch.10, but as `happy go lucky', I changed a few
loop timings, and now I got:

NRF.Mod sending   6158   6  
NRF.Mod receiving   6158   6

Which is 1KB/s transfer rate, is it good? Can we in theory get
even better?

In SCC.Mod, I added these timings,
Wait = 50; Wait0 = 5; Wait1 = 1000;

SubSnd uses Wait0,
ReceiveHead uses Wait1,
SendPacket uses Wait.

Conversely on RPI, 
I use delay(WAIT/*=50*/) for subsnd();

I have also extended delay/retry Oberon side
WriteReg1(4, 0*010H + 15); (*SETUP_RETR delay + retry count*)

While on RPI, best I got for

On RPI side, I use for file access
k = fread(&buf, 1, PAK_SIZE, f);
k = fwrite(&rx.dat, 1, head1.len, f);
as I initially thought that fputc(), fgetc() perform slower in loops. 

Tomas Kral <thomas.kral at email.cz>

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