devel Graupner hott SUMD receiver connection

[fred_fr]

Hi

I would like to build connection of receiver Graupner hott with SUMD mode

SUMD the protocol is a serial link at 115200 bps

- 2 bytes starting : A8 01
- 1 byte number of channels ex: 08
- 2 bytes * 8 channels = value ...
- 2 bytes CRC-CCITT Xmodem

example: A8 01 08 22 60 2E D8 2E D8 2E D8 2E E0 2E E0 2E E0 2E E0 6B E7

I think I will copy and modify the SBUS implémantation already done.

Questions :

- To calculate the CRC, it's best to use
- less memory and more CPU
- less CPU and more memory ( 512 Bytes )

- how to display somme debug value : debug_printf("Mission leg loaded no#: %x\n", leg); ?

- Some recommendations?

fred

[fred_fr]

hi

It's done


Modifications apply in source autoquad r75 are the following ones:
- Add 2 files for protocol SUMD: grhott.c and grhott.h (base on files " futaba.c " and " futaba.h ")
- Add declaration of "GRHOTT_UART" in files board_6_1.h and board_6_1a.h
- Add inlude of grhott.h in the radio.h file
- Modify file radio.c: add case 4 for SUMD

more detail in french http://autoquad6.free.fr/grhott-sumd...ad-grhott.html

[vonsy]

Bonjour Fred,

I'm a little bit lost I also have an Graupner GR-16 receiver. Can i use the standard connection on M14 using the default firmware ? with SUMO8 set on the receiver ?

If i understand you use the S-BUS connector to connect to your receiver ? with SUMDOF08 set on your receiver and also with your modify firmware right ?

The link h**p://autoquad6.free.fr/grhott-sumd/aqv6.6_sumd.hex it is base on the lastest firmware R76 ?

Thank's for letting me know.

Regards.

Pascal.

[fred_fr]

[vonsy]

Bonjour Fred,

Thank's for all your explanation

By the way is there a reason to go with SUMDOF08 ? it is more stable then SUMO8 ?

I have try your firmware and each time i connect with Qgroundcontrol it give me each time a different firmware version .... bug ?

Merci

Amicalement.

Pascal.

[fred_fr]

[fred_fr]

hi

I found the version number on Qgroundcontrol.

I fixed at 211 in the code.

Anyone know how to determine this value? when compiling?

I have also remove a debug message.

We have update the firmware link :

[Max]

Bonjour Frédéric,

Thanks for your efforts! I think SUMD support would be a great addition to AQ. Can you confirm that the RADIO_QUALITY issue is fixed in your published source code files?

For anyone looking for a working link to the code/details, see http://autoquad6.free.fr/grhott-sumd/au ... rhott.html

-Max

[fred_fr]

hello

In my last firmware RADIO_QUALITY issue is fixe .



fred

[Max]

Yes, thanks, but I was asking specifically about the source files (grhott.c/h) which are available from the URL I posted. Just wanted to make sure those were the latest versions.

-Max