[BUG REPORT] Sigma Studio TCP-IP read from DSP ( With Temporary Solution )

Hi, im working on TCP-IP comunication with ADAU1401/1701.

First of all, i have not found any valid documentation about TCP-IP Protocol, i dont know if not exist or Analog Devices refuses to make it public.

So i spended many hours debuging and using Wireshark, trying to understanding Sigma TCP-IP Protocol, finally i got sucess, but i have found BUGs on Sigma Studio, that make Full Implementation Impossible! see bellow explanation and a temporary solution, when us still waiting for Analog Devices solves.

Hardware in use:

ADAU1401 on custom board, self boot with 24lc64
ADAU1701 on custom board, self boot with 24lc64

ESP8266 with WiFi, connected to ADAU board I2C
ESP32 with WiFi, connected to ADAU board I2C

Software in use:

Windows 10 Pro ( 64bits ), running on I7-7700HQ with 16GB

Sigma Studio Version ( 4.2 Build 1. Rev 1764 ) 08/23/2018 ( with bug! )
Sigma Studio Version ( 4.3 Build 3. Rev 1777 ) 05/17/2019 ( with bug! )
Sigma Studio Version ( 4.4 Build 0. Rev 1786 ) 06/26/2019 ( with bug! )

1) Using Sigma Studio, i can write Program and Parameters to ADAU like expected, but i cant connect EEPOM to TCP-IP, so i cant read or write on 24lc64, i hope Analog Devices quickly solves that.

2) Using sigma Studio, when i try to read Program or Parameters from ADAU, problems starts...

a) Sigma Studio is doing (4) four requests, each request expect 256 registrers/1024 Bytes "Requesting Parameters" using TCP-IP at same time, sequential, expect response only after that.

b) The four (4) resquest sequencial start to be a problem, because TCP-Server over Ethernet or WiFi is slow, because it needs to read data from ADAU registers, build a packet and send, then repeat a process for next requests, a possible solution is Sigma Studio do a request, wait TCP-IP Server process this request and response data, so repeat this process until read all.

c) Ween TCP-IP Server reply first request, Sigma Studio receives and read only (1020 Bytes ), missing last four ( 4 bytes ), then raises an exception and stops! also shows "Compiled, Comms Failed!" this left me crazy, because first i think have error on TCP-Server, but after analize TCP with Wireshark, all 1024 bytes are in packet like must be.

d) After certify my TCP-Server is working correctly, i start to undertand what are wrong with Sigma Studio, i have disassembled tcp.dll and found that Analog Devices Team Programers, have coded that dll and never do a single test, because Sigma Studio requests 1024 bytes, response has to be 4 Bytes ( Packet Header ) followed by 1024 bytes, its 1028 bytes to read from TCP, but tcp.dll has hardcoded to read only 1024 bytes, so it will never read all bytes!

e) After i found the problem, i have discovery that this problem is not only for ADAU1401/1701 DSPs, it affects all ADAUDCP Family, i have contacted Analog Devices, but they send me a e-mail, ask for post on this site.

f) Because i need it finished quickly, I start to try solve this myself, so i do a pacthe on dll changing 1024 to 1028 ( Found it on many places ), and after that patch, Sigma Studio receives all bytes correctly, the patch address changes from one dll version to another, if u want to solve this yourself, open tcp.dll with an hex editor search for "14 2A 20 00 04 00" and replace with "14 2A 20 00 04 04" ( you have to replace many times to cover every ADAU Model ) 

3) Sigma Studio do multiple sequencial requests, it still a problem ( Some times TCP-Server cant quickly read data from ADAU over I2C and do a response ), on this case Sigma Studio stil ignoring some bytes at end o packet wenn receives, Analog devices must consider the folowing:

Current Sigma Studio Request

Send Read Request from 0x0000 to 0x00FF
Send Read Request from 0x0100 to 0x01FF
Send Read Request from 0x0200 to 0x02FF
Send Read Request from 0x0300 to 0x0400
Wait TCP-Server response from all packets "some times TCP-Server receive a re-send packet from Sigma Studio, i think becase TCP timeout"

Sugested Sigma Studio Request

Send Read Request from 0x0000 to 0x00FF, wait TCP-Server response for that packet
Send Read Request from 0x0100 to 0x01FF, wait TCP-Server response for that packet
Send Read Request from 0x0200 to 0x02FF, wait TCP-Server response for that packet
Send Read Request from 0x0300 to 0x0400, wait TCP-Server response for that packet

I hope Analog Devices solves this problems, also make an usefull TCP-IP Documentation

Removed proprietary code, due to Analog Devices request.
[edited by: Rocha at 9:15 PM (GMT -4) on 3 Sep 2020]