CP2102 datasheet(9/36 Pages) SILABS

9 / 36 page

AN169

Rev. 2.3

3.10. SI_GetTimeouts

Description:

Returns the current read and write timeouts. If a timeout value is 0xFFFFFFFF (INFINITE) it has

been set to wait infinitely; otherwise the timeouts are specified in milliseconds.

Supported Devices:

C8051F320/1/6/7, C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D,

C8051F380/1/2/3/4/5/6/7, C8051T320/1/2/3/6/7, C8051T620/1/2/3, CP2101/2/3/4/5/8/9

Prototype:

SI_STATUS SI_GetTimeouts (LPDWORD ReadTimeout, LPDWORD WriteTimeout)

Parameters:

1. ReadTimeout—SI_Read operation timeout (in milliseconds).

2. WriteTimeout—SI_Write operation timeout (in milliseconds).

Return Value:

SI_STATUS

= SI_SUCCESS or

SI_INVALID_PARAMETER or

SI_DEVICE_IO_FAILED

3.11. SI_CheckRXQueue

Description:

Returns the number of bytes in the receive queue and a status value that indicates if an overrun

(SI_QUEUE_OVERRUN) has occurred and if the RX queue is ready (SI_QUEUE_READY) for

reading. Upon indication of an Overrun condition it is recommended that data transfer be

stopped and all buffers be flushed using the SI_FlushBuffers command.

Supported Devices:

C8051F320/1/6/7, C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D,

C8051F380/1/2/3/4/5/6/7, C8051T320/1/2/3/6/7, C8051T620/1/2/3, CP2101/2/3/4/5/8/9

Prototype:

SI_STATUS SI_CheckRXQueue (HANDLE Handle, LPDWORD NumBytesInQueue,

LPDWORD QueueStatus)

Parameters:

1. Handle—Handle to the device as returned by SI_Open.

2. NumBytesInQueue—Address of a DWORD variable that contains the number of bytes

currently in the receive queue on return.

3. QueueStatus—Address of a DWORD variable that contains the SI_RX_EMPTY (also

SI_RX_NO_OVERRUN), SI_RX_OVERRUN, or SI_RX_READY flag.

Return Value:

SI_STATUS

= SI_SUCCESS or

SI_DEVICE_IO_FAILED or

SI_INVALID_HANDLE or

SI_INVALID_PARAMETER

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