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Messages - FrankWestland

1
USB Infrared Toy / Re: Searching for code examples: python IR Toy MooVee micro
I'm making some progress. here is my output from my commandline when I send the ir toy some chars in python 2.7
Please, respond if you have any suggestions to overcome the buffer underrun after sending the last string (with length = 8 chars) in the package:
Code: [Select]
#run selftest
written hex(ord(byte)) : 1 0x56
respons byte no  1 chr(ord()):  V
respons byte no  2 chr(ord()):  2
respons byte no  3 chr(ord()):  2
respons byte no  4 chr(ord()):  2
written hex(ord(byte)) : 1 0x54
respons byte no  1 chr(ord()):  F
respons byte no  2 chr(ord()):  A
respons byte no  3 chr(ord()):  2
respons byte no  4 chr(ord()):  0
written hex(ord(byte)) : 1 0x53
respons byte no  1 chr(ord()):  S
respons byte no  2 chr(ord()):  0
respons byte no  3 chr(ord()):  1
written hex(ord(byte)) : 1 0x24
written hex(ord(byte)) : 1 0x25
written hex(ord(byte)) : 1 0x26
set the modulation frequency
written hex(ord(byte)) : 1 0x6
written hex(ord(byte)) : 1 0x4e
written hex(ord(byte)) : 1 0x0
==========================
The Packet to be send: 
Amount of strings 
(with length 62 chrs (except the last one is shorter and ends with 0xFF 0xFF)) 
to be sent:  2

Iterative part with:
	written hex(ord(byte)) : 1 0x3
	respons byte no  1 hex(ord()):  0x3e
	send string - 0  with length:  62
	respons byte no  1 hex(ord()):  0x3e
	send string - 1  with length:  8
	respons byte no  1 hex(ord()):  0x3e
	#'t' = 0x74 for the amount of bytes send
	respons byte no  1 hex(ord()):  0x74
	respons byte no  2 hex(ord()):  0x0
	respons byte no  3 hex(ord()):  0x46
	#Here we seem to have and 'F' (for buffer underrun) instead of 'C' for succes
	respons byte no  4 hex(ord()):  0x46
	respons byte no  5 hex(ord()):  0xff
	respons byte no  6 hex(ord()):  0xff
	respons byte no  7 hex(ord()):  0xff
	respons byte no  8 hex(ord()):  0xff
	respons byte no  9 hex(ord()):  0xff
	respons byte no  10 hex(ord()):  0xff
	==========next packet===============

resetting:
written hex(ord(byte)) : 1 0x0
written hex(ord(byte)) : 1 0x0
written hex(ord(byte)) : 1 0x0
written hex(ord(byte)) : 1 0x0
written hex(ord(byte)) : 1 0x0

end


------------------
(program exited with code: 0)
Press return to continue
2
USB Infrared Toy / Searching for code examples: python IR Toy MooVee micro heli
Hello everybody,

I'm looking for help. My intention is writing python code for a MooVee Revell micro helicopter using a pc with USB-serial and the IR Toy from Dangerous Prototypes (V2.2) I want to use it in my classroom for educational purposes. I am a teacher in computer science. My learners learn to programm with python 2.7 using among others serial.py.
I managed (trial and error) to read the packages from the remote control delivered with the micro heli using the IR Toy:

Here I only list the Least significant byte of the 16 bitsvalue read by the IR Toy because the most significant byte is 0 for every reading except for byte 34:

byte 1: startbyte (always 1)
byte 2: throttle on/off (1=off 0=on)
byte 3 to 9: throttle values (0b0000000 to 0b1111110)
byte 10 to 14: left/right value (default  0b1000)
byte 14 to 18: forward/backward value (default 0b1000)
byte 18 and 19: channel A=0b01,B=0b10,C=0b11
byte 20: ?
byte 21: toggle video on/off
byte 22 and 23: ?
byte 24: trim left
byte 25: trim right
byte 26: toggle light
byte 27: toggle turbo
byte 28: take photo
byte 29: demo
byte 30 to 34: checksum (sum all bytes==1) %(mod) 16

byte 34 : total packetlength in microsec = sum(all byte-lengths of byte 1 to 34,  bin(ord(least significant readbyte))*21.3333)


Hopefully I have not made to many errors so far.
For the reverse action, that is, to program code for letting the heli exercise some nice movements, I like to get some help from someone who knows how to write python. Some example code would be very nice but any advice is appreciated

gr,
Frank Westland

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