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CCS/TMS320F28377S: USB Example "usb_host_msc" is not running

sam kh
Expert 1635 points
Part Number: TMS320F28377S

Tool/software: Code Composer Studio

I am using TMS320F28377S micro controller and I want to run "usb_host_msc" example.

As given in example data is coming on serial port and microcontroller also taking command like "help" and "ls".

When I connect PEN drive with micorcontroller as follow.

RED-     VCC (4.98V) 
WHITE- GPIO43 (N) of micro controller with 12E resistance in series.
RED -    GPIO42 (P) of micro controller with 12E resistance in series.
Black-    Gound

But when I try to read pen drive using "ls" command then it always give " NODEV>FR_NOT_READY".  

I am using external crystal (freq=10MHz).Micro controller supply voltage is 3.3V and for PEN DRIVE I use LM3525M regulator and it is giving 4.98V

So what is the possible reason for this?

  

  • 0
    TI__Mastermind 32995 points
    Hi,

    The issue may be with the frequency of the AUX clock. Please make sure AUXCLK is set for 60MHz. The example uses XTAL as the source for AUXCLK and assumes a 20MHz clock. Because you are using a 10Mz clock, you will need to adjust the multiplier and dividers for AUXCLK.

    Regards,
    sal