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  • Author Author: packetgeek
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RDA5807SP update - 2015-03-28

packetgeek

Finally had some time to play the the RDA5807SP again.  Attacked it from a different direction (probably what I should have done in the first place).  The documentation mentions specific bits (the chip id) being 0x58.  In reading the registers, it turns out that I wasn't swapping the 8-bit chunks around properly.  That, plus a couple hours of fixing stuff, and I now have the following functions working in RDA-mode (vice TEA5767 emulation): init, tune, and status (enough to listen to local radio stations).  I still need to work out the volume, mute/unmute, and seek functions.

 

Now I just have to face up to the fact that I'm seriously behind on note writing.

 

- Tim (28 Mar 2015)

  • in reply to Former Member

    Sepp,

     

    Not a problem...  I'm doing it mostly to relearn C, as well has helping out anyone else in the same boat (or starting to work with the language and the hardware).  I'm currently working on porting the code to the Cubietruck (another reason for not employing WiringPi).  So far I have the TEA5767 working on it (but that has always been the easy one).

     

    - Tim

  • in reply to packetgeek

    Dear Tim,

     

    thanks for all the time and effort you spend trying to figure this all out!

     

    Sepp

  • Volume function now working.  Also the mute and unmute functions.  These last two required that I also make the status function more compliant with the programming guide (had to cause the program to wait until the seek/tune bit was set).  Not sure of the reasoning but, if you don't wait for the bit to be set (after running unmute), the radio will report being tuned to 87.5 MHz, even though it's playing the station to which you tuned previously.  A long wait, before rereading the registers, isn't required.  50 msec seems to work.

     

    Still avoiding having to write the documentation.  Seems to be a serious bout of procrastination in progress.