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protocol for JJRC H31?
- Schamane
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19 May 2017 06:11 #62411
by Schamane
Replied by Schamane on topic protocol for JJRC H31?
Hm, did you look into the bind file? I think i did it in the right order there. But i could do a new capture this weekend if necessary.
- goebish
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19 May 2017 08:49 - 19 May 2017 08:49 #62412
by goebish
Replied by goebish on topic protocol for JJRC H31?
Yes, I started with the bind file, only bind packets here, no init
Last edit: 19 May 2017 08:49 by goebish.
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22 May 2017 08:28 #62485
by joeblack
Replied by joeblack on topic protocol for JJRC H31?
@Schamane + goebish please continue work on protokoll for JJRC H31 - the original TX is awful bad, would be nice to fly them with my DEVOs 7e and DEVO 10.
Thanks in advance
jörg
Thanks in advance
jörg
- Cibershaman
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28 May 2017 07:34 #62620
by Cibershaman
Replied by Cibershaman on topic protocol for JJRC H31?
+1! I order LT8910, i have arduino nano, radiolink a9 and same info about mod of nrf24-multipro shenatic to conect it to my radiolink!
if i change nrf24l01 to LT8910, i wwill needed only sketch... I understand, that chip is different and it's not esy, but...
- Schamane
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07 Jun 2017 18:09 #62877
by Schamane
Replied by Schamane on topic protocol for JJRC H31?
Hello again,
sorry for the delay (away for holiday). In this link is a capture of the initialisation process and bind and throttle at the and. I hope the capture is alright and contains all the necessary information.
sorry for the delay (away for holiday). In this link is a capture of the initialisation process and bind and throttle at the and. I hope the capture is alright and contains all the necessary information.
- Schamane
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- goebish
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09 Jun 2017 08:12 - 09 Jun 2017 08:47 #62902
by goebish
Replied by goebish on topic protocol for JJRC H31?
Last edit: 09 Jun 2017 08:47 by goebish.
- Schamane
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09 Jun 2017 15:36 #62907
by Schamane
Replied by Schamane on topic protocol for JJRC H31?
Checked it, and you're right! I was sniffing the wrong chip. I will correct that. sorry.
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09 Jun 2017 15:58 #62909
by Schamane
Replied by Schamane on topic protocol for JJRC H31?
Wrong again, was just easier to solder on the second chip.
www.dropbox.com/s/wf85gchw2na8a0f/wiring%20lt8910.jpg?dl=0
This is my wiring.
The way i see it is:
GN = 2 = MISO
BN = 14 = SPI_SS
OR = 16 = CLK
RD = 1 = MOSI
YE = 15/9 = VSS (GND) wrong!!!
www.dropbox.com/s/wf85gchw2na8a0f/wiring%20lt8910.jpg?dl=0
This is my wiring.
The way i see it is:
GN = 2 = MISO
BN = 14 = SPI_SS
OR = 16 = CLK
RD = 1 = MOSI
YE = 15/9 = VSS (GND) wrong!!!
- goebish
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09 Jun 2017 16:18 #62911
by goebish
Replied by goebish on topic protocol for JJRC H31?
If the LT8910 has a too small pitch to solder directly on it you should be able to trace the 4 SPI pins to the main MCU (mosi, miso,clk,ss) then solder your probes on the bigger chip.
- Schamane
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09 Jun 2017 16:19 #62912
by Schamane
Replied by Schamane on topic protocol for JJRC H31?
yes, that is the layout i refered to. I just used the pads that connected to the pins for easier soldering. The way i see it we need pin 1, 2, 16 and 14, right?
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09 Jun 2017 16:31 #62914
by Schamane
Replied by Schamane on topic protocol for JJRC H31?
Well, thats what i did i think. why do you think SS/Enable is wrong? MISO seems to correspond to ENABLE (active low).
- goebish
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09 Jun 2017 17:01 #62915
by goebish
Replied by goebish on topic protocol for JJRC H31?
Refer to my screenshot, I think SS is wrong because it is always HIGH (inactive) in the left part of the capture, where I believe the LT8910 com happens (the part on the right is not LT8910 data, I only get
garbage
when I pass it through a LT8910 decoder).
- Schamane
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09 Jun 2017 19:01 #62916
by Schamane
Replied by Schamane on topic protocol for JJRC H31?
ok, i will try to make a few captures with different settings (might take a few days), maybe i had a wrong configuration. the decoded text file doesn't tell me anything. i have no clue what a good decoded file should look like. anyway, thanks a lot for your patience.
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17 Jun 2017 19:35 #63035
by Fernandez
Replied by Fernandez on topic protocol for JJRC H31?
I saw BG also sell module 8910 (un amped)
www.banggood.com/LT8910-Wireless-Module-...94.html?rmmds=search
www.banggood.com/LT8910-Wireless-Module-...94.html?rmmds=search
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07 Jul 2017 09:52 #63328
by Schamane
Replied by Schamane on topic protocol for JJRC H31?
www.dropbox.com/s/4idsnrpczozpk3a/init%2Bbind_dump.7z?dl=0
ok, another attempt@24mhz. maybe the results of the decoder make sense this time, but it looks pretty similar to me. maybe the packets sent after the initialisation are correct?? i checked the connections again and they match the pinout of the 8910. i don't know where the mistake is or what else to do.
ok, another attempt@24mhz. maybe the results of the decoder make sense this time, but it looks pretty similar to me. maybe the packets sent after the initialisation are correct?? i checked the connections again and they match the pinout of the 8910. i don't know where the mistake is or what else to do.
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07 Jul 2017 09:56 #63329
by goebish
Replied by goebish on topic protocol for JJRC H31?
Sorry but I can't do anything with this csv, please post the .logicdata file.
- Schamane
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07 Jul 2017 10:08 #63330
by Schamane
Replied by Schamane on topic protocol for JJRC H31?
maybe it has something to do with pin 13 "pkt_flag", this is what google translator tells me "The transmit / receive status flag can be set to high or low active"?
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