/* $Id: xgpio_selftest.c,v 1.2 2004/01/13 19:50:05 linnj Exp $ *//********************************************************************************       XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS"*       AS A COURTESY TO YOU, SOLELY FOR USE IN DEVELOPING PROGRAMS AND*       SOLUTIONS FOR XILINX DEVICES.  BY PROVIDING THIS DESIGN, CODE,*       OR INFORMATION AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE,*       APPLICATION OR STANDARD, XILINX IS MAKING NO REPRESENTATION*       THAT THIS IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT,*       AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE*       FOR YOUR IMPLEMENTATION.  XILINX EXPRESSLY DISCLAIMS ANY*       WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE*       IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR*       REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF*       INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS*       FOR A PARTICULAR PURPOSE.**       (c) Copyright 2002 - 2004 Xilinx Inc.*       All rights reserved.*******************************************************************************//*** @file xgpio_selftest.c** The implementation of the XGpio component's self test function.* See xgpio.h for more information about the component.** @note** None** <pre>* MODIFICATION HISTORY:** Ver   Who  Date     Changes* ----- ---- -------- -----------------------------------------------* 1.00a rmm  02/04/02 First release* 2.00a jhl  01/13/04 Addition of dual channels and interrupts.* </pre>******************************************************************************//***************************** Include Files ********************************/#include "xgpio.h"/************************** Constant Definitions ****************************//**************************** Type Definitions ******************************//***************** Macros (Inline Functions) Definitions ********************//************************** Variable Definitions ****************************//************************** Function Prototypes *****************************//******************************************************************************//*** Run a self-test on the driver/device. This function does a minimal test * in which the data register is read. It only does a read without any kind* of test because the hardware has been parameterized such that it may be only* an input such that the state of the inputs won't be known.  ** All other hardware features of the device are not guaranteed to be in the * hardware since they are parameterizable. ** ARGUMENTS:** @param InstancePtr is a pointer to the XGpio instance to be worked on.*        This parameter must have been previously initialized with*        XGpio_Initialize().** @return** XST_SUCCESS always. If the GPIO device was not present in the hardware a bus* error could be generated. Other indicators of a bus error, such as registers* in bridges or buses, may be necessary to determine if this function caused* a bus error.** @note** None.*******************************************************************************/XStatus XGpio_SelfTest(XGpio *InstancePtr){    XASSERT_NONVOID(InstancePtr != XNULL);    XASSERT_NONVOID(InstancePtr->IsReady == XCOMPONENT_IS_READY);    /* Read from the data register of channel 1 which is always guaranteed     * to be in the hardware device. Since the data may be configured as     * all inputs, there is not way to guarantee the value read so don't     * test it.       */    (void)XGpio_DiscreteRead(InstancePtr, 1);    return(XST_SUCCESS);}