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	Package:	GAEM
	Version:	V2-1-2	Marked:	(not marked)
	Constituent:	vaem	Tag:	sun-gcc

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gAENV.c File Reference

Implements command/response for the AEM's "Environmental Monitor". More...

#include "ga_p.h"
#include "gAEM_p.h"
#include "GAEM/gAENV.h"
#include <string.h>

Functions
void	packPayloadAENV (gaemHandle ga, unsigned int cmdHeader, unsigned int localAD, unsigned long long value, unsigned int *payload)
	Packs the cmdHeader, localLATpAD and value into the 96-bit payload.
int	__aenvCmdLoad (gaemHandle ga, unsigned short func, unsigned short reg, unsigned long long value)
	Generic routine for sending response-less commands.
int	gAENVload (gaemHandle ga, unsigned short reg, unsigned long long value)
	Loads a register with value.
int	gAENVread (gaemHandle ga, unsigned short reg, unsigned long long *value)
	Reads a register specified by reg and stores result in value.

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Detailed Description

Implements command/response for the AEM's "Environmental Monitor".

Author:

Curt Brune -- curt@slac.stanford.edu

Currently only the Virtual AEM is supported. The fidelity of the emulation is quite low.

Command Fidelity ======= =============================== dataless Succeed, but no effect on electronics

register writes Succeed, but no effect on electronics

register reads Succeed, but always return 0 -- timeout for non-existent registers.

Note: All the registers are 64-bits wide.

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Function Documentation

int __aenvCmdLoad (  gaemHandle  ga, unsigned short  func, unsigned short  reg, unsigned long long  value )

Generic routine for sending response-less commands. Parameters: ga  gaemHandle for AEM func  command/response function code reg  register of AEM to load value  32-bit value to load into AEM register Returns: G_OK on success Common subroutine for sending dataless commands and loading AENV on board registers registers. The func parameter indicates a "dataless" or "load" command. For dataless commands reg is interpreted as the "opcode" of the dataless command and value is ignored. For load commands reg is the AENV register to load with value.

int gAENVload (  gaemHandle  ga, unsigned short  reg, unsigned long long  value )

Loads a register with value. Parameters: ga  gaemHandle for AEM reg  register of AEM to load value  64-bit value to load into AENV register Returns: G_OK on success The value written to AENV registers is ignored, but the act of writing initiates the ADC acquisition cycle. In the VAEM no action is taken.

int gAENVread (  gaemHandle  ga, unsigned short  reg, unsigned long long *  value )

Reads a register specified by reg and stores result in value. Parameters: ga  gaemHandle for AEM reg  register of AEM to load value  pointer to 64-bit value to store register read result Returns: G_OK on success Returns the 4 ADC values associated with reg in the AEM Environmental Monitor. In the VAEM this function always returns a value of 0.

void packPayloadAENV (  gaemHandle  ga, unsigned int  cmdHeader, unsigned int  localAD, unsigned long long  value, unsigned int *  payload )

Packs the cmdHeader, localLATpAD and value into the 96-bit payload. Parameters: ga  gaemHandle for AEM cmdHeader  32-bit command header word localAD  32-bit local access descriptor word value  64-bit value to load into AENV register payload  pointer to 96-bits of pre-allocated storage Returns: void Packs the bits of cmdHeader, localAD and value into the 96-bits pointed to by payload. The packing is specific to local "on board" registers for the AEM Environmental Monitor.

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