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f28069 how communicate between cpu and aic by mcbsp

user4019469
Prodigy 60 points
Other Parts Discussed in Thread: CONTROLSUITE, TMDSDOCK28069

please,help me.

I trying program to receive DA data from aic.

by mcbsp but can not receive in correctly(I seem).

1. problem

I set frame sync receive interrupt.

when interruption occur I display DRR1 reg val.

but display data is FFFF(hex).

At that time

I sured Rx pin wave form but I did not seem FFFF.

I expected Rx pin wave form equal to DRR1 reg val.

But not

2. environment

I  used the control suite sample project.

Mcbsp loop back. I tried loop back disable.

3. Questions

3.1 Were My procedure or expection wrong?

3.2 Is it need aic setting? If so how setting?

3.3 what register should I confirm?

thank you read. I hope answers.

  • 0
    TI__Guru 57255 points

    Hi,

    I might recommend taking a look at the following appnote.  It is built around the F28335 (not the F28069), but the implementation should be very similar.
    http://www.ti.com/lit/spraaj2


    Thank you,
    Brett

  • 0 in reply to Brett Larimore
    Prodigy 60 points

    Thank you for your reply!

    i am going to refer the url.

  • 0 in reply to user4019469
    Expert 1085 points

    Hello user4019469-san,

    I faced the same phenomenon on McBSP.
    DRR1 was 0xFFFFh and McBSP RINT did not occur.

    So, I debugged the sample code "Example_2806xMcBSP_DLB_int " in C:\ti\controlSUITE\device_support\f2806x\v150\F2806x_examples_ccsv5.

    This project works well as for DLB(Digital Loop Back) Operation.  

    If we use it by DLB=0, we need the software modifications;  

    1. Software Modifications

    Example_2806xMcBSP_DLB_int.c -----------------------------------------------------

    //*************** Initialize McBSP Registers
    // McBSP register settings for Digital loop back
    McbspaRegs.SPCR2.all=0x0000; // XRST =0

    // DLB disabled
    McbspaRegs.SPCR1.all=0x0000; // RRST =0, DLB enabled old 0x8000


    F2806x_Mcbsp.c -------------------------------------------------------------------

    void InitMcbspaGpio(void)
    {
    EALLOW;
    /* Configure McBSP-A pins using GPIO regs*/
    // This specifies which of the possible GPIO pins will be McBSP functional pins.
    // Comment out other unwanted lines.

    GpioCtrlRegs.GPAMUX2.bit.GPIO20 = 2; // GPIO20 is MDXA pin
    GpioCtrlRegs.GPAMUX2.bit.GPIO21 = 2; // GPIO21 is MDRA pin
    GpioCtrlRegs.GPAMUX2.bit.GPIO22 = 2; // GPIO22 is MCLKXA pin
    GpioCtrlRegs.GPBMUX2.bit.GPIO58 = 1; // GPIO58 is MCLKRA pin
    GpioCtrlRegs.GPAMUX2.bit.GPIO23 = 2; // GPIO23 is MFSXA pin
    　　GpioCtrlRegs.GPBMUX1.bit.GPIO44 = 1; // GPIO44 is MFSRA pin

    // The following 4 lines must be commented out.
    // GpioCtrlRegs.GPBMUX2.bit.GPIO50 = 2; // GPIO50 is MDXA pin
    // GpioCtrlRegs.GPBMUX2.bit.GPIO51 = 2; // GPIO51 is MDRA pin
    // GpioCtrlRegs.GPBMUX2.bit.GPIO52 = 2; // GPIO52 is MCLKXA pin
    // GpioCtrlRegs.GPBMUX2.bit.GPIO53 = 2; // GPIO53 is MFSXA pin

    After updating these two files, please build them.

    2. Hardware connections
    On TMDSDOCK28069, please connect the following Pins by JUMPER WIRES.
    GPIO20:DOCK pin#20 <---> GPIO21:DOCK pin#21
    GPIO22:DOCK pin#22 <---> GPIO58:DOCK pin#58
    GPIO23:DOCK pin#23 <---> GPIO44:DOCK pin#59

    After connecting these pins by wires, please run this program.

    You can see sdata and rdata on expressions tab as follows,

    McBSP RINT works with no problem.

    Best regards,

    ay0689

  • 0 in reply to ay0689_3
    Guru 30330 points
    Ay0689,

    Thanks for posting such a clear answer! This should help anybody else who has this problem in the future.

    -Mark