iMX53 USB OTG endpoint 2-7 enable operation issue

[VictorWu]

hi guys.

i found something really confusing.

i reference from linux code, i'm not using linux. i want to config the USB OTG core to work as device.

i enable the endpoint 0, and it works fine. i event can pass the device enumeration process with host (PC).

but after that the other endpoints can not work. i can not capture bulk data from USB bus. since the endpoints initializations are all passed. but the endptctrl1-7 is still 0. that means these endpoints are failed to be enabled.

after my testing, i found if only i enable endpoint 1 first, then i can capture buld data via endpoint 7. i can get the interrupt from endpoint 7. but the value of endptctr7 is still 0.

so confusing.

so is there anyone could supply me advices.

many thanks.

victor

[VictorWu]

oh my goodness, i solved this problem.

the register addresses of endpoint 1 to 7 are all wrong accroding to the iMX53RM.

it should be start from 0x53f801c4 to 0x53f801dc.

because of this, when i enable endpoint 1, the endpoint 7 works!!!!!