"2d8:Not Ready Error"

Question

Created Apr ’21

Replies 2

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Hi all,
I am trying to write device driver, Inherited IOUserSerial class,
In start function I have "opened device----->Opened Interface---->copyPipe----->pipe->IO(),

I have also tried pipe->IO in Tx Available() function ,

-- IO function returning device "not ready Error".

any help is appriciated,

Answered by in 669612022

This usually means your device is terminating due to an unplug or unstable connection on the bus.

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Answer 1

OP

Apple

Apr ’21

Accepted Answer

This usually means your device is terminating due to an unplug or unstable connection on the bus.

1

Answer 2

revancse2 OP

Apr ’21

hi MrSkute ,

Thank you for your reply, i am able to progress with your inputs,
I am calling connectqueues function In Tx available(also tried calling in start function)
and passing txqmd to device using pipe->IO, Is this the correct way ? Or should i override connectqueues(),

- i am not receiving what i have sent. i am able to receive some garbage value.

parallelly i am trying to make it work with IOUSerUSBSerial class ,
I am getting "100:Access denied" Error in coolTerm/Screen Application when i click on Connect
In logs i am able to see super class functions "ConnectQueues,DIsconnectQueues,Deactivate " being called

Any input is appriciated

0