Joseph Roberts / Mbed 2 deprecated PPM_Test

Test program for my PPM library.

Dependencies:   PPM mbed

Connect the PPM input to pin 5 of your mbed, the result of each channel will be printed over serial at 115200.

My channel mapping, yours will be different

  • Channel 1 is roll. min 1000. max 1900
  • Channel 2 is pitch. min 1000. max 1900
  • Channel 3 is throttle < 900 when not connected. min 1000. max 1900
  • Channel 4 is yaw. min 1000. max 1900
  • Channel 5 is arm. armed > 1800 else unarmed
  • Channel 6 is mode. rate > 1800. stab < 1100. else error
  • Channel 7 is spare
  • Channel 8 is spare

main.cpp@0:20458b362896, 2014-08-26 (annotated)

Committer:
joe4465
Date:
Tue Aug 26 15:58:19 2014 +0000
Revision:
0:20458b362896
Test program for my PPM library.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
joe4465 0:20458b362896 1 #include "mbed.h"
joe4465 0:20458b362896 2 #include "PPM.h"
joe4465 0:20458b362896 3
joe4465 0:20458b362896 4 //My channel mapping, yours will be different
joe4465 0:20458b362896 5 //Channel 1 is roll. min 1000. max 1900
joe4465 0:20458b362896 6 //Channel 2 is pitch. min 1000. max 1900
joe4465 0:20458b362896 7 //Channel 3 is throttle < 900 when not connected. min 1000. max 1900
joe4465 0:20458b362896 8 //Channel 4 is yaw. min 1000. max 1900
joe4465 0:20458b362896 9 //Channel 5 is arm. armed > 1800 else unarmed
joe4465 0:20458b362896 10 //Channel 6 is mode. rate > 1800. stab < 1100. else error
joe4465 0:20458b362896 11 //Channel 7 is spare
joe4465 0:20458b362896 12 //Channel 8 is spare
joe4465 0:20458b362896 13
joe4465 0:20458b362896 14 //PPM object
joe4465 0:20458b362896 15 PPM *_ppm;
joe4465 0:20458b362896 16 //InterruptIn pin (p5)
joe4465 0:20458b362896 17 InterruptIn *_interruptPin = new InterruptIn(p5);
joe4465 0:20458b362896 18 //Connection to the PC
joe4465 0:20458b362896 19 Serial pc(USBTX, USBRX);
joe4465 0:20458b362896 20
joe4465 0:20458b362896 21 int main()
joe4465 0:20458b362896 22 {
joe4465 0:20458b362896 23 //Create instance of PPM class
joe4465 0:20458b362896 24 //Pass in interrupt pin, minimum output value, maximum output value, minimum pulse time from transmitter, maximum pulse time from transmitter, number of channels, throttle channel (used for failsafe)
joe4465 0:20458b362896 25 _ppm = new PPM(_interruptPin, 0, 1, 1000, 1900, 8, 3);
joe4465 0:20458b362896 26
joe4465 0:20458b362896 27 //Setup serial connection
joe4465 0:20458b362896 28 pc.baud(115200);
joe4465 0:20458b362896 29
joe4465 0:20458b362896 30 //Loop, printing data
joe4465 0:20458b362896 31 while(true)
joe4465 0:20458b362896 32 {
joe4465 0:20458b362896 33 //Array to hold RC commands
joe4465 0:20458b362896 34 float rcCommands[8] = {0,0,0,0,0,0,0,0};
joe4465 0:20458b362896 35
joe4465 0:20458b362896 36 //Get channel data (mapped to between 0 and 1 as I passed these in as my max and min in the PPM constructor)
joe4465 0:20458b362896 37 //The throttle channel will return -1 if the signal from the transmitter is lost (the throttle pulse time goes below the minimum pulse time passed into the PPM constructor)
joe4465 0:20458b362896 38 _ppm->GetChannelData(rcCommands);
joe4465 0:20458b362896 39
joe4465 0:20458b362896 40 //Print
joe4465 0:20458b362896 41 printf("%f, %f, %f, %f, %f, %f, %f, %f\r\n", rcCommands[0], rcCommands[1], rcCommands[2], rcCommands[3], rcCommands[4], rcCommands[5], rcCommands[6], rcCommands[7]);
joe4465 0:20458b362896 42
joe4465 0:20458b362896 43 //Wait 1 so the data can be read
joe4465 0:20458b362896 44 wait(1);
joe4465 0:20458b362896 45 }
joe4465 0:20458b362896 46 }