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About offset 0x017C register of HS-USB Register of i.MX51

Question asked by yuuki on Nov 14, 2014
Latest reply on Nov 17, 2014 by igorpadykov

Dear  All,


In FSL WindowsBSP,
We have the problem that a CPU may be hung-up, when a register is written by USB Driver.

When a USB driver writes any value into offset 0x017C of HS-USB register, this problem may occur.


In the source code of WinCE BSP, this register is defined as ENDPTNAKEN.

However, in a reference manual, this 0x017C register is "reserved".


MCIMX51 Multimedia Applications Processor Reference Manual Rev. 1 2/2010
- Table 60-28. HS-USB Register Summary(P.2882)


In Linux BSP source code, this 0x017C register is not defined.


In WinCE,
What kind of function does this 0x017C register have?
Is access(writing) to this 0x017C register required?

Best Regards,