Hello all.
I have started playing around with a remote switch plug kit I got. I've seen on the internet that there are a couple of DIY projects controlling those plugs through a uC and an RF transmitter and I though that this could make a nice Picaxe project.
After reading about the protocol and especially looking at the code at this site I had a better understanding about what I needed to implement and the correct timing I had to use. I used a 20X2 chip running at 32MHz and I was able to turn on and off the plug.
This is the code I used to switch on a plug:
I'm trying to make the code run at 16MHz speed by altering the pulse length (waitShort). My target is to run this code on a 08M2 chip overclocked. Any ideas about what I could do to save me a few CPU cycles on the chip and run the code a bit faster at 16MHz speed?
I have started playing around with a remote switch plug kit I got. I've seen on the internet that there are a couple of DIY projects controlling those plugs through a uC and an RF transmitter and I though that this could make a nice Picaxe project.
After reading about the protocol and especially looking at the code at this site I had a better understanding about what I needed to implement and the correct timing I had to use. I used a 20X2 chip running at 32MHz and I was able to turn on and off the plug.
This is the code I used to switch on a plug:
Code:
'
' PicAxe remote switch controller
' Emulates the output from a PT2262 encoder chip.
'
' ver 0.1(Proof-Of-Concept), by Steliosm (steliosm@gmail.com)
' based on project rc-switch (http://code.google.com/p/rc-switch/)
'
'
' Overclock the chip
setfreq m32
' Define the timings - each pulse should be about 300-500uS depending on the receiver.
' The following timing value seem to work OK.
symbol waitShort = 150
symbol waitLong = 3 * waitShort
symbol waitSync = 31 * waitShort
'
' Bit-bang the RF Nexa protocol
'
main:
'
' This should be done in a better way :-)
'
for b0 = 1 to 3
' Group address (dip switches set at 10001)
gosub send0
gosub sendF
gosub sendF
gosub sendF
gosub send0
' Plug address (dip switches set at 01000)
gosub sendF
gosub send0
gosub sendF
gosub sendF
gosub sendF
' SendCommand (FF-on/F0-off)
gosub sendF
gosub sendF
' Send Sync
gosub sendSync
next
' End
end
send1:
' Send tri-State 1
for b1 = 1 to 2
high 4
pauseus waitLong
low 4
pauseus waitShort
next
return
send0:
' Send tri-State 0
for b1 = 1 to 2
high 4
pauseus waitShort
low 4
pauseus waitLong
next
return
sendF:
' Send tri-State F
high 4
pauseus waitShort
low 4
pauseus waitLong
high 4
pauseus waitLong
low 4
pauseus waitShort
return
sendSync:
' Send sync sequence
high 4
pauseus waitShort
low 4
pauseus waitSync
returnI'm trying to make the code run at 16MHz speed by altering the pulse length (waitShort). My target is to run this code on a 08M2 chip overclocked. Any ideas about what I could do to save me a few CPU cycles on the chip and run the code a bit faster at 16MHz speed?
This speed should be able to provide me with info about what is going on in the picaxe and may be help me tune my code.
n, 0
