CCS/66AK2G12: ASRC EXAMPLE EVMK2Gx

Hello Rahul,

I think the internal validation code would be help me for my usecase as example. I need to upsample the input of my i2s input of the MCASP. In best case the output of the ASRC uses the main CLK.

My currently setup is:

    asrcCfg -> AASRC_SYSCONFIG = 0x1;
    PID_ID = asrcCfg -> AASRC_PID;
    asrcCfg -> INPUT_CLOCKZONE_CONTROL_0 = 0x7;     //RXSYNC 7 MCASP AFSR
    asrcCfg -> OUTPUT_CLOCKZONE_COUNT_0 = 0x7;      //RXSYNC 7 MCASP AFSX
    asrcCfg -> INPUT_CLOCK_ZONE_DIVIDER = 0x0;      //Input Clock Divider -- disabled
    asrcCfg -> OUTPUT_CLOCK_ZONE_DIVIDER = 0x0;     //Output Clock Divider -- disabled
    asrcCfg -> SRC_FIFO_CONTROL_0 = 0x10001;        //IN/OUT Samples must be available for the interrupt
    asrcCfg -> SRC_CONTROL_0 = 0x200;               //Auto-mute
    asrcCfg -> AASRC_SYSCONFIG = 0x0;               // Auto data format
    asrcCfg -> SRC_CONTROL_0 = 0xC0000200;          //Enable Both Channels

My first try was to loop input/output. I can setup edma for manual trigger. But the problem is in my case to setup it for hw-trigger. Do I need to use a Ping Pong transfer for input ouput? I am currently try to config the ASRC in stream mode. For that I mux the event muxctl10 and muxctl11 to the ASRC events. Group mode is possible, too.

Hello Rahul,

is there a quick solution possible?

Thank you!

Richard