Programming IO board (Quick Howto)

[niels jalling]

First setup pico programming environment.

I am using a Raspberry Pi4.

A very good description on how-to setup a pi pico development environment on a Raspberry Pi is here:
https://learn.arm.com/learning-paths/embedded-and-microcontrollers/rpi_pico/sdk/

When you have the HelloWorld example  blinking on your pico the next step is build one of the HL2IOBoard applications.

Download:
wget https://github.com/jimahlstrom/HL2IOBoard/archive/refs/heads/main.zip

Unzip:
unzip main.zip

Rename folder:
mv HL2IOBoard-main HL2IOBoard

Goto code build folder:
cd /HL2IOBoard/n1adj_hr50/build

Build application:
cmake ..
make

Copy application to pico:
cp main.uf2 /media/$USER/RPI-RP2/

73 de oz9ny, Niels

[Dalton Williams]

Niles and the group,

Thank you Niles for this excellent information ! ! !  I gave up on trying to use Windows and VS Code and purchased a Raspberry Pi and after months of frustration used your instructions and was successful in under an hour!!!

Now that I have successfully programed my Pico I have a question.

My code works and outputs the BCD code but changes only when I transmit or tune. I was hoping it would follow my selecting different bands when receiving without having to transmit or tune,

What am I missing?  

M:y working code is attached if anyone is interested or can help.

Thank Niles and everyone,

Dalton

W5EIM

Dalton Williams

DeFever 41 MV Easy Living

20 Years & 34,800 Miles on the water

Amateur Radio W5EIM

Capital Yacht Club Member

MTOA Member 

AGLCA Member

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[Clifford Heath]

My code works and outputs the BCD code but changes only when I transmit or tune. I was hoping it would follow my selecting different bands when receiving without having to transmit or tune,

I think it would be a feature of your host software as to when the HL2 is told to change bands. What are you using at that end?

Clifford Heath

[Mike Lewis]

RX and TX frequencies can be sent out differently, as chosen by each app dev.  Ther can be up to 12 RX frequencies as I recall.

 

I set the rx_band = tx_band in my version of the code that generates BCD, passes though PTT, and forces Aux Rx jack for split IF on Xvtr bands 6M and higher.

 

K7MDL2/HL2_IO_BOARD_BCD: BCD and PTT outputs for the HL2 IO board designed by N2ADR. VHF band focused, modify to suit your needs.

 

Each SDR app handles the Aux RF differently.  Thetis and PiHPSDR (maybe Quick also now??) will handle it per band.

 

• Mike K7MDL

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[James Ahlstrom]

Hello Dalton,

It is possible that your SDR software is not sending receive frequencies. Try using different SDR software to see if your code works with it. Or add printf() statements to see what is happening.

When you say it works when tuning, it looks like the Tx frequency is being sent correctly.

Jim

N2ADR

[James Ahlstrom]

Hello Dalton,

On second thought, that is not correct. If it works when tuning, the new Tx frequency is being sent when tuning. But if you change bands, the TX frequency will change too. So it seems that changing bands does not send the new Tx frequency. If changing bands sends the new Tx frequency, it does not mater if the Rx frequencies are sent. The changed Tx frequency will change the band in your code. See if your SDR software sends the new Tx frequency when changing bands.

Jim

N2ADR