Discussions

Radio Setup

Posted by Loti on October 12, 2010 at 4:40am
Hi All,

I am doing the first test with my new APM :)

Leds are Ok.
Gps starts saying -1 sat and then 0 sat but gives the correct coordinates, is it ok ?
My problem is with the radio setup.

I get this in setup->radio
Move both sticks to each corner. Hit Enter to save: save: Saving:
CH1: 902 | 2100
CH2: 901 | 2100
CH3: 1122 | 1892
CH4: 1128 | 1893
CH5: 1000 | 2000
CH6: 1000 | 2000
CH7: 1000 | 2000
CH8: 1000 | 2000

 I don't get anything in channels 5 to 8, I have an 8 channel receiver connected and working well (tested directly  with servos)

Another thing is that in test mode
Channel1,2 and 4 give values from 1115 to 1875 out -32 to 35 Why are the values given in setup and test different ?
Channel3 gives values from 1120 to 1875 out 0 to 99 Why are the values given in setup and test different ?
are the out values form about -30 to + 30 correct ?

Bye

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Replies

  • Loti October 13, 2010 at 4:07pm
    Ok, I got it

    the setup_radio routine doesn't look at chanels 4 to 7.
    In line 255 (setup.pde) for(i = 0; i <4; i++){ should be for(i = 0; i< 8; i++){
    same thing for line 268. I don't know if it's a bug or not, if it's not, the routine should not
    writeln the values for those channels (I think)
    On the other side, one of the channels of my RX receiver completly freezes the APM, if I disconnect it (and after a reset) the APM
    starts working well again.
    Bye
  • Loti October 13, 2010 at 12:50pm
    Any idea ?

    Don't know how to solve this.

    Thanks. Loti
  • Loti October 12, 2010 at 1:49pm
    I have reprogrammed the Atmega328p (PPM encoder/failsafe) with these instruction http://code.google.com/p/ardupilot-mega/wiki/AVRStudio
    I still have the same problem, channels 4 to 7 seem "dead".
    I have connected the channel0 to channel 4 and nothing, it works on channel 0 but not in channel 4,5,6 or 7.
    what can I do ?

    bye
  • Developer
    Jason Short October 12, 2010 at 12:04pm
    CH1,2,4 output degrees. Ch3 outputs 0-100 for throttle percent.
    Correct is a matter of your radio's settings. For or calcs, 500 pwm = 45°

    I don't know why CH_1 and 2 seem different. Please experiment more and let me know what you find.
    Jason
  • Matthias Badaire October 12, 2010 at 9:54am
    I do get -36 +36 on all my channel except throttle (ch3) as well and everything works ok.
    I suppose it is a bug in the test program . Nothing to worry about except logging a bug for this.
  • 3D Robotics
    Chris Anderson October 12, 2010 at 8:41am
    You might try updating the PPM firmware, instructions here.
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