Reminder: Wednesday Evening 40 and 80 meter Nets

When: Wednesday, 25 March 2020, 8:00pm to 9:00pm, (GMT-05:00) America/Chicago

Where:40 and 80 Meters

View Event

Organizer: jomatlock@...

Description: The 40 Meter Net will be at 8:00 pm central time  on 7.122 +-. QRM
NCS is WQ5RP Operator to be determined.

Wednesday evening 80 Meter CW Net. will be at  (8:30PM Central Time Wednesday). 
The 80 meter net will be called on 3.564 MHz +/- QRM.
Net control operators are Johnny AC0BQ or Paul N0NBD.

* NEW *  Wednesday evening DMR Voice Net will be at (Thursday) 0300 UTC (9:00PM Central Time Wednesday/)
Four States QRP has a Brandmeister DMR Talk Group (TG31654). Join us to discuss QRP, ask questions, or just ragchew. The Wednesday net is a directed net  but any other time you may use the Talk Group to chat with other QRPers.
Net Control operator is Bert NØYJ.

Have built a Hilltopper 40 and it seems dead.  Is there any published information showing voltages through the circuit?

Jim, WW9H

Reminder: Wednesday Evening 40 and 80 meter Nets

When: Wednesday, 25 March 2020, 8:00pm to 9:00pm, (GMT-05:00) America/Chicago

Where:40 and 80 Meters

View Event

Organizer: jomatlock@...

Description: The 40 Meter Net will be at 8:00 pm central time  on 7.122 +-. QRM
NCS is WQ5RP Operator to be determined.

Wednesday evening 80 Meter CW Net. will be at  (8:30PM Central Time Wednesday). 
The 80 meter net will be called on 3.564 MHz +/- QRM.
Net control operators are Johnny AC0BQ or Paul N0NBD.

* NEW *  Wednesday evening DMR Voice Net will be at (Thursday) 0300 UTC (9:00PM Central Time Wednesday/)
Four States QRP has a Brandmeister DMR Talk Group (TG31654). Join us to discuss QRP, ask questions, or just ragchew. The Wednesday net is a directed net  but any other time you may use the Talk Group to chat with other QRPers.
Net Control operator is Bert NØYJ.

Thanks Ron!

This is my first Arduino project, and though I was wondering why so many Arduino based radios used IO lines instead of the I2C Bus(it seemed to me they were going through a lot of effort), now I know why!

I haven't gotten to hacking libraries yet.
However, after making the HW changes that Dave suggested (which involved removing the pullups from the encoder/moving them to code), and changing 2 parameters in the code, all seems well. I've been tuning all over the dial with no pops, clicks, or PLL drop outs.

The 2 lines of code I changed were:

attachInterrupt(digitalPinToInterrupt(PinA), Dial, FALLING) ... instead of LOW

and
if (interruptTime - lastInterruptTime > 10) { ... instead of 5

Changing from calling DIAL on a LOW to calling DIAL on a FALLING edge made the largest change.
Increasing interupt debouce was just added insurance ;)

--
, Ron WB9YZU

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Congrat’s Pam! Welcome to the hobby.

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Well,

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Thanks

There is another buffer of length 32 defined in directory utility in file twi.h
Without wading through all the code, I would guess you would need to increase this one also.

You have the Si5351 and your LCD both on the I2C bus.  That is a lot of I2C activity.  ( Personally I think the Wire library is brain dead as it uses interrupts but still blocks until all the activity is done. )

The Wire library has a buffer size of 32.  If the buffer is full, the code just drops the data and sets an error.  So you may be dropping some writes to the Si5351 when things get busy.

Here is the code from the wire library where it drops data...

size_t TwoWire::write(uint8_t data)
{
  if(transmitting){
  // in master transmitter mode
    // don't bother if buffer is full
    if(txBufferLength >= BUFFER_LENGTH){
      setWriteError();
      return 0;
    }

To see if this is the issue you could edit the library to increase the buffer size.  The file to change is Wire.h.

On my computer ( I installed to directory Arduino ) the path is:   C:\Arduino\hardware\arduino\avr\Libraries\Wire\src
If you have other versions of Wire in your own libraries, then you will need to find the one the compiler uses.

Ron   K1URC

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