OmapL138 USB example(evmomapl138_v1) code initialization failure

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                OMAP-L138 USB Test

Additional Equipment
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- None

 
Test Description
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This test will perform two checks:
1) check if it can activate USB VBUS and sense it
The code enables VBUS and verifies the appropriate bit is set in
SYSCONFIG to indicate VBUS was detected. A cable should not be inserted during this check.
 
2) check for the connection of a USB OTG device
The code will look for a D+ or D- rising edge event which will trigger
the INTSRCR_SESSREQ interrupt which it polls for. Once detected
it will determine if the processor is on the A or B side of the cable
and the speed of the device.
In case an OTG cable is not available, the test also switches to
check for a connection to a USB host (plug the board into a computer's USB port).
It alternates between the OTG and HOST check every 2 seconds.
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Initialize the Required BSL Modules
-----------------------------------

Waiting for VBUS low...
--> USB power enabled

Waiting for VBUS high...
--> VBUS is high.
error initializing usb!

********** OMAP-L138 TEST FAILED **********

Any idea?

Best Regards,

Ghz

It could be an issue with the example code. We will look into it.

Jeff

hi, Jeff

This example is test passed on before. Last I  pull USB port times.

::

Initialize the Required BSL Modules
-----------------------------------

Waiting for VBUS low...
--> USB power enabled

Waiting for VBUS high...
--> VBUS is high.
error initializing usb!

********** OMAP-L138 TEST FAILED **********

Best Regards.

GHZ

Hi,Jeff

I do a test.

I single step omapl138EVB test usb. In "evmomapl138_usb.c"'s USB_init(void).

 printf("Waiting for VBUS low...\n");
 USTIMER_delay(500000);
 while ((SYSCONFIG->CFGCHIP[2] & 0x00010000) != 0);

 // Start session
 SETBIT(USB_OTG_DEVCTL, 0x00000001);
 USTIMER_delay(500000);

 printf("--> USB power enabled\n\nWaiting for VBUS high...\n");

 if ((SYSCONFIG->CFGCHIP[2] & 0x00010000) == 0)
 {
    rtn = ERR_INIT_FAIL;  // Fail
 }

 printf("--> VBUS is high.\n");

This programme Run to"SETBIT(USB_OTG_DEVCTL, 0x00000001);"

I pull usb port.

This test is Passed.

But I measure baseboard HW 's R203 both sides voltage ,no change. I think it should change.

Sorry.I 'm  bad for english.

Best regards.

Ghz