Prop2 I/O

[time2dive]

I know how Out 0-15 work, how does P0-P15 work?  I am trying to run a MDFLY Audio board.  It takes 5vdc to run.  As soon as it gets power it starts playing the track that I have on the memory stick.  I thought (and I may be very well mistaken) that P0-P15 were inputs or outputs.  I thought that W was a switched 5vdc high, R was 5vdc and B ground.  Am I mistaken?  I could run an external 12vdc relay off of one of the outputs if this is not the case.  I was trying to eliminate a 5vdc power supply.

This is my set up code:

' -----[ I/O Definitions ]-------------------------------------------------
' -----[ I/O Definitions ]-------------------------------------------------

Sio             PIN     15                      ' no ULN / SETUP = UP
Trigger         PIN     6                       ' no ULN / SETUP = DN
TX              PIN     13                      ' no ULN / SETUP = UP
RX              PIN     12                      ' no ULN / SETUP = UP


'
'
'
' Note: The P1T button is used to simulate the PIR sensor in this demo.



Audio           PIN     14                   ' Audio Board
Pir             PIN     6                    ' PIR sensor
doors           PIN     0                    ' doors is connected to P5 to simulate pneumatic solenoid
outside         PIN     4                    ' lights are connected to P4
inside          PIN     9                    ' output to a relay to control the inside lights
fog             PIN     8                    ' output to a relay to control a fog machine
' -----[ Constants ]-------------------------------------------------------

IsOn            CON     1
IsOff           CON     0
t9600    CON  84
open     CON  $8000
baud     CON  open + t9600

[JonnyMac]

I found a few boards on their site; which one are you using?

[time2dive]

I am using an older board that is no longer on their site.  This is the hookup diagram for it.  It does work when I apply power.

http://www.firediving.com/MVPLY3Ehookup.pdf

Tim

[JackMan]

I have one of these audio players but not very happy with the performance. You should be able to power it from a Prop-1, Prop-2 by simply connecting the POS lead to any R pin and a common GND between the two boards, this will provide 5vdc to the player. An OUTx to pin 5 of the player should start the audio, another OUTx to pin 4 should play the next track.

[bsnut]

Just remember that you have 5v @ 1 amp available from the Prop2 to power what you want. I don't think that the player you are planning to use will use over 200 ma this should be fine for the Prop2

[time2dive]

Problem mostly solved.  I ran my power form one of  the R pins and I am using OUT1 to turn on the audio board.  Since I only have one audio track on the memory stick it starts playing the audio track as soon as power is applied......either that or my board has a glitch.....either way as of now it works.

[bsnut]

It's good to hear that you have it working. The way you solve your other problem is with a short pulse on the OUTx (pin 5 on the player). It needs done like this.

HIGH 0
PAUSE 500
LOW 0

Make sure that the "0" that I am showing here is changed to match your OUTx.

[JonnyMac]

Do NOT use HIGH!!!

The inputs are active-low and probably have pull-ups on the board.  To "press" a button do this:

Play_Pause:
 LOW PP_PIN
 PAUSE 50
 INPUT PP_PIN
 RETURN

Use INPUT at the end of the sequence to release the pin to the onboard pull-up.  Note, too, that the ULN input circuitry is a pull-down so you need to cut any ULN channels that correspond to the pins you're using.  Or.... you could try to use the OUTx terminals instead of the TTL terminals; the OUTx terminals are open-collector which is what your audio player wants, anyway.