RadiSys 6200plus Series Manual de usuario descargar pdf (Pagina 168)

Sample

API Modules

Appendix B

B-10

/*****************************************************************************

* PURPOSE: This function will write to a PLC-5/40V’s A16 configuration or

* control register.

* INPUT: UWORD baseAddress will contain the base address of the

* PLC-5/40V.

* PLC540V_REGISTER_TYPE targetRegister will contain the

* particular PLC-5/40V register that will be written.

* UWORD registerValue will contain the value to be written

* to the specified target register.

* OUTPUT: PLC540V_STATUS_TYPE *status will contain the final status

* of requesting this function. This status could be and EPC

* or PLC-5/40V value.

* RETURNS: Nothing.

* EXAMPLE:

* UWORD regValue = 0x1234;

* PLC540V_STATUS_TYPE status;

* read_plc540v_register(0x0FC00,

* kPLC540V_OF_REG,

* regValue,

* &status);

* Copyright Allen-Bradley Company, Inc. 1993

****************************************************************************/

void write_plc540v_register(UWORD baseAddress,

PLC540V_REGISTER_TYPE targetRegister,

UWORD registerValue,

PLC540V_STATUS_TYPE *status)

{

/* Let’s initialize the status variable to success. */

memset((char *) status, 0x0, sizeof(PLC540V_STATUS_TYPE));

/* Let’s write the word to the PLC-5/40V’s register. */

status->epcStatus=EpcToVmeAm((BM_MBO|A16S), BM_W16,

(char far *) &registerValue,

baseAddress+targetRegister,

sizeof(UWORD));

if (status->epcStatus < 0)

{

status->statusCategory = kEPC_STATUS;

status->plc540vStatus = kPLC540V_WRITE_REGISTER_FAILED;

}

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