# TP_CheckBusy

## C Specification

  `#include <nitro/spi.h>`

      u32 TP_CheckBusy( TPRequestCommandFlag command_flgs );

## Arguments

command_flgs | Specifies the command on which to perform a busy check.

## Return Values

Returns 0 if a request is not being executed. Returns a non-zero value if a request is being executed.

## Description

Checks to see if a touch panel request that has been transmitted to ARM7 is being executed You can check more than one request simultaneously if you provide the argument with the bitwise OR of multiple flags.

`TP_REQUEST_COMMAND_FLAG_SAMPLING` | Requests sampling one time. Send with `TP_RequestSampling*`.
`TP_REQUEST_COMMAND_FLAG_AUTO_ON` | Requests to start autosampling. Send with `TP_RequestAutoSamplingStart`.
`TP_REQUEST_COMMAND_FLAG_AUTO_OFF` | Requests to stop autosampling. Send with `TP_RequestAutoSamplingStop`.
`TP_REQUEST_COMMAND_FLAG_SET_STABILITY` | Requests to set chattering provision parameters. Send with `TP_RequestSetStability`.

The following describes the enumerated type definitions of the arguments.

    // Type of instruction issued to the touch panel
    typedef enum {
    TP_REQUEST_COMMAND_FLAG_SAMPLING      =  1 << TP_REQUEST_COMMAND_SAMPLING ,
    TP_REQUEST_COMMAND_FLAG_AUTO_ON       =  1 << TP_REQUEST_COMMAND_AUTO_ON ,
    TP_REQUEST_COMMAND_FLAG_AUTO_OFF      =  1 << TP_REQUEST_COMMAND_AUTO_OFF ,
    TP_REQUEST_COMMAND_FLAG_SET_STABILITY =  1 << TP_REQUEST_COMMAND_SET_STABILITY
    } TPRequestCommandFlag;

## See Also

## Revision History

04/19/2004 Initial version