Fix for RX FS2A version with LQFP STM32 chip.

[ajjjjjjjj]

Waiting for someone to test if it works.

This is almost exact port of pascallanger/DIY-Multiprotocol-TX-Module@5148449

[pfeerick]

I'll be able to test this for you shortly... I have both the problem receivers in question from pascallanger/DIY-Multiprotocol-TX-Module#730, and recently acquired a FS-i6X.

[pfeerick]

I got the docker build environment up, and matched the proposed change as needing to be made to line 311 of the current master. However, it did not seem to have any effect with these RX... I basically had to sit the PCB (not the aerial?!) on top of the transmitter antenna for it to successfully bind (it would either not bind, or kick the transmitter out of bind mode but not be bound - I'm assuming incomplete bind). Unfortunately, it didn't occur to me until after I'd flashed current main back on to try against a Flysky FS-iA6B as a comparison, so will try again later with that to see what happens with a genuine receiver.

opentx/radio/src/targets/flysky/AFHDS2A_a7105.cpp

Lines 309 to 313 in a11fc23

	EndSendBIND123_: //-----------------------------------------------------------
	A7105_SetPower();
	A7105_SetTxRxMode(TXRX_OFF); // Turn LNA off since we are in near range and we want to prevent swamping
	A7105_Strobe(A7105_RX);
	EnableGIO();

[ajjjjjjjj]

Thanks, seems like something else must also be changed.
I'll not continue on this one as I don't have any of those "bad" receivers.

[TomTech2004]

Hello
Can someone tell me what pins of the processor the channels are connected to?
Thanks

[pfeerick]

On what, the receiver?

…

---------- Forwarded message --------- From: TomTech2004 ***@***.***> Date: Fri, 5 July 2024, 3:19 am Subject: Re: [OpenI6X/opentx] Fix for RX FS2A version with LQFP STM32 chip. (PR #307) To: OpenI6X/opentx ***@***.***> Cc: Peter Feerick ***@***.***>, Comment < ***@***.***> Hello Can someone tell me what pins of the processor the channels are connected to? Thanks — Reply to this email directly, view it on GitHub <#307 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABJ66KPG3IYZ6FBKCSCNMGTZKV733AVCNFSM6AAAAABKL4VX6GVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDEMBZGM3TIMZXGU> . You are receiving this because you commented.Message ID: ***@***.***>

[TomTech2004]

Yes, on the FS2A-4CH receiver. I received one but with broken pins. The receiver itself works but I don't know which pins channels 1-4 are on.

[pfeerick]

Looks like they are helpfully on the same side of the MCU, and in reverse order to the pins 😮

[TomTech2004]

Thank you

[BryanSouza91]

Does anyone have any updates on this? I'm interested in getting a couple of these receivers and willing to work on the fix if necessary. Thanks

[ajjjjjjjj]

There is an rather easy fix by directly using MPM AFHDS2A code. OpenI6X codebase is mostly adjusted by me for that purpose, but i never finished the process.