/* ====================================================================== *
 * 
 * singleCycle.c
 * Sample program for accessing the VME bus with the vme_/rcc libraries
 * by Markus.Joos <at> CERN.Ch; 
 * adapted and commented by Dirk Hoffmann -CPPM-, April 2004.
 * 
 * ====================================================================== */

#include "rcc_error/rcc_error.h"
#include "vme_rcc/vme_rcc.h"

int main(void) 
{ 
	VME_MasterMap_t master_map; 
	/* Declare VMEbus pointers volatile to avoid problems with code
	 * optimization by the compiler */
	volatile u_int *lptr, ldata; 
	u_int ret, vbase; 
	int handle; 

	if ((ret = VME_Open()) != VME_SUCCESS) { 
		/* Never call a function withouth checking errors! */
		VME_ErrorPrint(ret); 
		exit(-1);
		}

	master_map.vmebus_address = 0x02000000; 
	master_map.window_size = 0x1000; 
	master_map.address_modifier = VME_A32; 
	master_map.options = 0;
	if ((ret = VME_MasterMap(&master_map, &handle)) != VME_SUCCESS) { 
		VME_ErrorPrint(ret); 
		exit(-1); 
		} 

	ret = VME_MasterMapVirtualAddress(handle, &vbase); 
	if (ret != VME_SUCCESS) {
		VME_ErrorPrint(ret); 
		exit(-1); 
		} 

	/* Access is performed here! */
	lptr = (u_int *)(vbase + 0xA50); 
	ldata = *lptr; 

	/* Always cleanup when we are done! */
	ret = VME_MasterUnmap(handle); 
	if (ret != VME_SUCCESS) {
		VME_ErrorPrint(ret); 
		exit(-1); 
		} 

	ret = VME_Close(); 
	if (ret != VME_SUCCESS) { 
		VME_ErrorPrint(ret); 
		exit(-1); 
		} 


	/* If there was no problem, we return 0 to the calling shell */
	exit(0);

}