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Irwell STM32 Digital VFO
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Hi Everyone
I have uploaded files for the STM32 BluePill based digital VFO including the software. The VFO is based on the work of radio hams JA2GQP and JA2NKD to whom I acknowledge for there work. I am not a software engineer or programmer so the software side of the Irwell project has and continues to be a difficult challenge for me, that said I have manged to make changes to the original software so that it is functional for the Irwell project as it is to-date. In its current state the software is fully functional for a single conversion superhet receiver or transceiver using two of the three Si5351 chips available on the VFO Oscillator PCB. Moving forward the software does require code adding to drive the third Si5351 IC on the oscillator PCB, this would then serve as a conversion oscillator to drive an additional mixer stage thus facilitating the upgrade of the transceiver to a dual conversion. My idea to do this is replicate the code from the BFO section, the current code for the BFO is such that adjustments and calibration can be made through the use of the "MODE" button used to activate the function then adjustments being made using the VFO's Rotary Encoder. So far I have not attempted to address this software challenge as I feel somewhat out of my depth! If anyone in the group with software skills would be willing to assist or take on the challenge of adding the neccessary code I would be grateful for your help and input. I have commented all of the software changes and additions that I have implemented so far and in the interests of learning I welcome any constructive comments relating to these. Please enlighten me if you feel there are better ways to implement my software changes or additions. In the next few days I will update the blog and document the VFO digital I/O expander which has been built and is working nicely. Regards Andy (G6LBQ) |
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Hi Andy,
You can use the PCA9540B i2c multiplexer to drive multiple si5351 VFOs with ease on the same bus without using any extra IOs. I have extensive software experience and can assist with questions that you may have.
Kind regards?
Kind regards
Rahul.S
From: [email protected] <[email protected]> on behalf of g6lbq via groups.io <ah.electronics@...>
Sent: Wednesday, October 27, 2021 1:36:22 PM To: [email protected] <[email protected]> Subject: [Special] [G6LBQ] Irwell STM32 Digital VFO ?
Hi Everyone
I have uploaded files for the STM32 BluePill based digital VFO including the software. The VFO is based on the work of radio hams JA2GQP and JA2NKD to whom I acknowledge for there work. I am not a software engineer or programmer so the software side of the Irwell project has and continues to be a difficult challenge for me, that said I have manged to make changes to the original software so that it is functional for the Irwell project as it is to-date. In its current state the software is fully functional for a single conversion superhet receiver or transceiver using two of the three Si5351 chips available on the VFO Oscillator PCB. Moving forward the software does require code adding to drive the third Si5351 IC on the oscillator PCB, this would then serve as a conversion oscillator to drive an additional mixer stage thus facilitating the upgrade of the transceiver to a dual conversion. My idea to do this is replicate the code from the BFO section, the current code for the BFO is such that adjustments and calibration can be made through the use of the "MODE" button used to activate the function then adjustments being made using the VFO's Rotary Encoder. So far I have not attempted to address this software challenge as I feel somewhat out of my depth! If anyone in the group with software skills would be willing to assist or take on the challenge of adding the neccessary code I would be grateful for your help and input. I have commented all of the software changes and additions that I have implemented so far and in the interests of learning I welcome any constructive comments relating to these. Please enlighten me if you feel there are better ways to implement my software changes or additions. In the next few days I will update the blog and document the VFO digital I/O expander which has been built and is working nicely. Regards Andy (G6LBQ) |
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