Recent content by jehill39

PROBLEM SOLVED! That was the hint that I needed! I restored the command that you suggested earlier, switched to T1200_4 and reduced the source speed to 1200 baud. It didn't work. I then switched to N1200_4 and it worked! Finally, I switched to N2400_4 and it still worked, so that'ts where I...

Before I do that, I'm going to configure my program for 9600 baud operation. The reason for trying that is that is the the utility that I am using to read VFO A was originally designed for 9600 baud. On my request, an option to select the desired baud rate was added by someone other than the...

The significance of this comment didn't register until after I had tried it and also installed an inverter. Neither method solved the problem. FWIW, the MIN and MAX values for the normal connection were 0.208 V and 0.053 V, respectively. The same values with the inverter were 4.50 V and 4.16...

Is the vertical scale set to 2V/cm on your screen shots or something else?

It is clear that I would need to solder a wire to the C.0 pin to do your testing. Would it be ok to solder the other end to pin C.5 to take advantage of the existing input resistors? Now I see why both of you suggest either using an inverter or the the Serin command. According to the manual...

According to the manual: "The serin command is used to receive serial data into an input pin of the microcontroller. It cannot be used with the serial download input pin, which requires use of the serrxd command instead." It wouldn't be too much trouble to connect a wire to one of the unused...

I have injected my comments in bold below: I will install an inverter as soon as I get a chance and see what the effect is. Hopefully, it will solve the problem. However, I have also asked the VFO A source vender if he can add an option to change the polarity. Otherwise, I would have to...

Let's go back a bit. My comments are in bold within your text. Space is at a premium. A design goal was to make the circuit boards as small as possible to ensure that they fit within the MFJ-4716RC box. See the attached photos to understand the challenge. The LED Display board is buried...

Thanks for all of your suggestions! hippy: I loaded your code and it works fine. Here are shots of the PICAXE Terminal window before and after I manually entered a frequency: Thank you so much for your effort. Now all I have to do is integrate your code into mine.

Here's a surprise. If I manually enter FA00014000000; in the terminal (14 MHz), I still don't get to the next line of code.

inglewoodpete: Thanks for confirming that "FA" is correct. I added the line "high AN2" immediately following the SERRXD command and as you may have suspected, it didn't execute, meaning that the specified data is not being received. Although the utility that I am using properly displays VFO A...

I am monitoring the frequency of VFO A on an amateur radio transceiver by connecting my 14M2 programming port to a utility that monitors VFO A and provides a continuous output in the following ASCII character format at 4800 baud: "FAxxxxxxxxxxx;", where x is a decimal digit 0-9 Here is an...

ibenson: Thanks for that observation. I guess that when you program a 14M2 using the PICAXE Editor, it automatically selects 4800 baud, right? Hemi345: That may have happened when I inserted a jumper to do a loop back test. The test probes on my multi-meter couldn't have done that.

Guys! I finally received my new 14M2's. Here is what I have observed so far: inglewoodpete: "If your PICAXE is new and has never been programmed by you before, it should constantly output a message (like) "I am you PICAXE 14M2" on the SerOut pin, when the chip is powered up." Here is what it...

There definitely is no wiring fault. I performed extensive continuity checks to verfify that. The 14M2 was installed properly. I should clarify what I mean by shorted. The outputs were shorted together, not to ground. 5v was applied to multiple TBD62781APG inputs via the shorts.