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using prop plug for another chip — Parallax Forums

using prop plug for another chip

mickalmickal Posts: 75
edited 2010-12-20 23:06 in General Discussion
i dont know if i killed it but i tried and failed getting prop recognized. no eeprom or crystal , pretty simple circuit not sure so am ordering another prop, im feeling not so suped up, ill order the regs, caps & crystal new prop and should be good!

I tried using the prop plug to program a picaxe but that IDE wont list /recognise the prop usb-serial like the propeller does.

Its probably that i have been holding my mouth the wrong way, ill try things again in the morning:smile:

if im going to order i may as well make it hurt and buy a USB Prop, perhaps.:nerd:

Comments

  • LeonLeon Posts: 7,620
    edited 2010-12-19 07:18
    Post the schematic.
  • mickalmickal Posts: 75
    edited 2010-12-19 20:14
    Here is what i setup! Identify hardware F7 IS NOT RECOGNIZING THE PROP THROUGH THE PROP PLUG.

    pe prop.JPG
    pe prop.JPG
    865 x 637 - 31K
  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2010-12-19 23:11
    Always check for power first - the regulator could be reversed on installation.
    Then check to see is the plug is reversed.
    Since the Prop Proto Board as 3 configurations, becareful to determine which is compatible.
  • mickalmickal Posts: 75
    edited 2010-12-20 20:51
    i did have it connected to 6V at first, one jumper wire on breadboard was outa place:frown:

    I have ordered a new prop(and usb prop) so i will be careful. I cant get this working, perhaps the chip is fried , perhaps not but ill soon know.
  • Nick McClickNick McClick Posts: 1,003
    edited 2010-12-20 21:34
    @mickal - I did a tutorial on programming the PICaxe with a prop plug here.
  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2010-12-20 22:23
    Reverse polarity can fry with as little as 0.5volts; while forward voltage can take over 6.0 volts in this case.

    I've certainly had my share of sudden death events due to reversed polarity. It always is a jolt to the pocket book, but now I try to pause and verify wiring - especially the power supply - before I power up.

    And yet, the Prop Plug is merely a generic USB to RS232 serial adapter - so there really isn't any reason it cannot be used in other contexts and with other micros.
  • mickalmickal Posts: 75
    edited 2010-12-20 23:06
    @Nick, great thankyou. This will be very useful. I got half a dozen USB to Serial cables from China on ebay. They were only $2.00 each but after installing the drivers they dont work !!

    @Loopy, I dont *think i reversed polarity. I will figure it out and post.
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