Cables to Go 39554 User's Guide download pdf (Page 46)

Release Notes for StellarisWare Revision 7243 (March 19, 2011)

4.2.2 Incorrect operation of TimerControlEvent ﬁxed (Reference 13219)

In previous releases, the TimerControlEvent API would inadvertently clear the event type for

TIMER_B back to TIMER_EVENT_POS_EDGE if the function was called to set the TIMER_A event

type and vice versa. Operation was correct only if TIMER_BOTH was used in the ulTimer parame-

ter. The code has now been corrected to ensure that setting the event type for one timer does not

have side effects on the other.

4.2.3 Changed order of operations in GPIOPinTypeGPIOOutput (Refer-

ence 12607)

The order of operations in GPIOPinTypeGPIOOutput and GPIOPinTypeGPIOOutputOD have been

reversed. Now, the pad is conﬁgured prior to making the pin be an output. By doing so, the output

will default to the current pin state (in other words, unchanged), as opposed to always being low

with the previous implementation.

4.3 Bug Fixes in Stellaris USB Library

4.3.1 USB Library Device endpoint 0 receive state incorrect (Reference

12997)

The device mode of the USB library was improperly transitioning from the receive state directly to

the idle state without passing through the status phase. This could cause enumeration issues or

other problems on devices that are using the control endpoint for communications dur ing regular

operation.

4.3.2 USB library improperly handles a device error (Reference 13094)

When a device enters an error state during normal operation, the USB host library was not properly

exiting the error state. The USB librar y now handles the error state by forcing the the device to

disconnect and then attempting to enumerate the device again.

4.3.3 USB audio device was checking wIndex value incorrectly (Reference

12992)

The USB audio device class was incorrectly checking the uIndex parameter on all requests and not

just on interface requests. The code has been changed to only check against the interface number

if the request was an interface request.

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Cables to Go 39554 User's Guide Page 46