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miegl / PiFmAdv

Advanced Raspberry Pi FM transmitter with RDS encoding
GNU General Public License v3.0
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Is it possible to transmit different frequencies from different gpio at same time? #52

Open francisbritto opened 5 years ago

francisbritto commented 5 years ago

Hi miegl,

In this project we can able to transmit one frequency from one GPIO at the instance.But my question here is ,any chance to transmit different frequencies from different GPIO at same time.

In Read-me document mentioned like we can configure GPIO pins 4,20,32.If it is the case is it possible to transmit three different frequencies with the help of three GPIO pins at the same time?

Thanks in Adavnce.

miegl commented 5 years ago

That might be possible - there are 3 general purpose clocks (GPCLK{0,1,2}) and 3 usable PLLs (PLLA, PLLC, PLLD). Although we can't really change PLLD's frequency.

francisbritto commented 5 years ago

Hi miegl,

Thank you very much for your response.It will be very helpful to me.Could you elaborate this thing?.It will be very helpful to us.

On 28-May-2019 6:43 PM, "Josef Miegl" notifications@github.com wrote:

That might be possible - there are 3 general purpose clocks (GPCLK{0,1,2}) and 3 usable PLLs (PLLA, PLLC, PLLD). Although we can't really change PLLD's frequency.

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miegl commented 5 years ago

Sure I could. A complete rewrite of pifmadv has been in my mind for a long time now.

francisbritto commented 5 years ago

Hi miegl,

Thanks for your reply.I am new to this domain.So could tou explain me how actually Raspberry PI is working as FM transmitter.What are the process involved in that and Role of the each component involved in this process.Could you guide me?

Regarding my query ,if you release PiFmAdv latest version( with Multiple frequency transmission option)it will be very helpful for everyone.