That's where every "C" programmer in the world started! Congrats! 
--
John - WA2FZW

In v2, pin A2 is not used anymore. You could remap the function button to
A2 instead of A3.

at line 233:
#define FBUTTON (A3)
change to:
#define FBUTTON (A2)

73 Allard PE1NWL

On Fri, February 2, 2018 17:03, Richard Sanders wrote:
> You are not alone! I had my bitx40 in pieces on my benchtop and wired the
> raduino using the orange I/O wire instead of the orange +12v
> wire...powered on....got nothing on my LCD...turned off...checked
> wiring...turned on a second time...still nothing...turned off...THEN I saw
> what I did wrong....it wasn't until I had reflashed the v2 software the I
> finally figured out why my unit keeps going to the Settings menu....it
> thinks that I am holding the function button down upon power up! With the
> button uninstalled I check the power of the orange A3 wire and am getting
> 0v!! :-( So I'm going to try and remap a different pin for the Function
> button...if that does not work or if I find that I actually damaged more
> than the I/O pin...then I'll go the "New Arduino Nano" route! Best of luck
> to all who are experimenting with the bitx's out there!!
>
> 73
> Ric
> KN4FTT
>

Yes, it's useless for RF as is, and likely kind of ideosyncratic and of sub 200khz bandwidth.
But for $23, it's very interesting.  Gets good reviews on Amazon:
      https://www.amazon.com/JYE-DSO-13801K-Open-Source/dp/B00WAQGGZ

Could add an SA612 mixer, bring your transmitted signal down to 100khz
and then monitor it using the DSO138.

Page 75 of the datasheet for the STM32F103C8 used on that scope
    https://www.mouser.com/ds/2/389/stm32f103c8-956229.pdf
says the sample time of the ADC when operating at 1msps is 0.107us
Could see Dexter's modulation envelope on sub 1mhz RF as a cloud of dots,
accumulating that cloud over many trigger events. 

If you had a fast sample and hold, and some way to measure time from trigger to sample, 
you could create a sampling scope.  That would be useful for RF, and could be very cheap.
One possible way to cheaply measure time from trigger to first ADC sample strobe would be counters in a 250mhz PAL,
read a count from the STM32 through an SPI interface into the PAL.  So a $3 PAL plus an STM32 and the sample and hold
gives a sampling head that effectively samples at 100mhz.   Samples after the first can be well timed, so could grab
many samples for each trigger.

Here's another possible way:  About $25 worth of parts as shown here but paired with a $2 STM32 dev board
instead of Houtman's 10mhz analog scope, gives us a 1 GHz bandwidth sampling scope.
    http://www.redrok.com/sampscope.htm
 
Thinking about cheap way to do test gear is almost as much fun as
thinking about cheap ways to do ham gear.

Jerry, KE7ER

On Thu, Feb 1, 2018 at 03:29 pm, Master Ice wrote:

Be warned these scopes are of absolutely NO use for RF work.

The bandwidth is 200KHz AT BEST!

No use whatsoever for RF work.

 

I would recommend in building these radios that you change All ground wires to Black and All Power (5 or 12V) to Red.

Reserve these colors for just 2 purposes.

You can use the wires you remove for additions.  Leave the molex pin on them.  I had a lot of spare Brown ones.

I can't stand an Orange wire being B+ (the term for us old Valve guys)!  26 Ga. stranded works great.   I got a bunch of colors at All Electronics.  Molex pins are at Tayda and Mouser.

You don't have to be in such a hurry and blow things up.  Check your wiring several times.  You could even make a connector chart with J numbers and pin numbers with wire color.   Match it up to what is on hfsignals.   It may mean you catch a mistake and save a lot of trouble shooting?

73'3

Mike,  WA6ISP

On 2/2/2018 8:03 AM, Richard Sanders wrote:

You are not alone! I had my bitx40 in pieces on my benchtop and wired the raduino using the orange I/O wire instead of the orange +12v wire...powered on....got nothing on my LCD...turned off...checked wiring...turned on a second time...still nothing...turned off...THEN I saw what I did wrong....it wasn't until I had reflashed the v2 software the I finally figured out why my unit keeps going to the Settings menu....it thinks that I am holding the function button down upon power up! With the button uninstalled I check the power of the orange A3 wire and am getting 0v!! :-( So I'm going to try and remap a different pin for the Function button...if that does not work or if I find that I actually damaged more than the I/O pin...then I'll go the "New Arduino Nano" route! Best of luck to all who are experimenting with the bitx's out there!!

73
Ric
KN4FTT

-- 
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID  "MotDog@..."
Mike@...

Most Arduino code pretty much ignores the "++" thing, using vanilla C.
Being an older coder guy and having learned from a first edition K&R in the early 1980's,
the extra stuff that C++ has to offer has never seemed worth the bother.
Especially on a microcontroller, where you really want to know exactly
what your code will compile down to. 

My advice is to first concentrate on learning C, hold off on C++

Jerry


On Fri, Feb 2, 2018 at 08:35 am, Arv Evans wrote:

C++ is what we use on Arduino systems like the Raduino.