xgpiops_sinit.c

自学ZedBoard：使用IP通过ARM PS访问FPGA（源代码）

/* $Id: xgpiops_sinit.c,v 1.1.2.1 2011/01/20 03:42:36 sadanan Exp $ */
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/**
*
* @file xgpiops_sinit.c
*
* This file contains the implementation of the XGpioPs driver's static
* initialization functionality.
*
* @note		None.
*
* <pre>
*
* MODIFICATION HISTORY:
*
* Ver   Who  Date     Changes
* ----- ---- -------- -----------------------------------------------
* 1.00a sv   01/15/10 First Release
* </pre>
*
******************************************************************************/

/***************************** Include Files *********************************/

#include "xparameters.h"
#include "xgpiops.h"

/************************** Constant Definitions *****************************/

/**************************** Type Definitions *******************************/

/***************** Macros (Inline Functions) Definitions *********************/

/************************** Function Prototypes ******************************/

/************************** Variable Definitions *****************************/
extern XGpioPs_Config XGpioPs_ConfigTable[];

/*****************************************************************************/
/**
*
* This function looks for the device configuration based on the unique device
* ID. The table XGpioPs_ConfigTable[] contains the configuration information
* for each device in the system.
*
* @param	DeviceId is the unique device ID of the device being looked up.
*
* @return	A pointer to the configuration table entry corresponding to the
*		given device ID, or NULL if no match is found.
*
* @note		None.
*
******************************************************************************/
XGpioPs_Config *XGpioPs_LookupConfig(u16 DeviceId)
{
	XGpioPs_Config *CfgPtr = NULL;
	u32 Index;

	for (Index = 0; Index < XPAR_XGPIOPS_NUM_INSTANCES; Index++) {
		if (XGpioPs_ConfigTable[Index].DeviceId == DeviceId) {
			CfgPtr = &XGpioPs_ConfigTable[Index];
			break;
		}
	}

	return CfgPtr;
}