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INTELLIGENT PLATFORM MANAGEMENT INTERFACE

PP 41x/03x 7-19

7.6.3 Reading Sensors

The IPMI specification supports many commands to manage and interrogate sensors. The

following program fragment illustrates how the current reading of a sensor can be obtained.

/* network function codes */

#define NFC_SENSOR_EVENT_RQ 0x04

/* commands */

#define CMD_GET_SENS_RD 0x2D /* Get sensor reading */

/* Completion codes */

#define COMPLETION_OK 0 /* Completion code OK */

/* error codes */

#define E_OK 0 /* OK */

#define E_COMPLETION 0x400 /* wrong completion code */

/* forward declarations */

void vBmcSmicSmsMessageWrite (const unsigned char *pbMessage,

unsigned char bLength);

void vBmcSmicSmsMessageRead (unsigned char *pbMessage,

unsigned char *bMessageLength);

/* response data structure provided to wGetSensorReadingCmd() */

struct SENSOR_READING

{

unsigned char bData;

unsigned char bStatus;

};

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

* wGetSensorReadingCmd

* This function gets current sensor reading.

* RETURNS: E_OK if it is OK, or error code

unsigned short int wGetSensorReadingCmd

(

unsigned char bSensorId,

struct SENSOR_READING *psSensorReading

)

{

unsigned char bLength;

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Dynamic Engineering PMC2PCI Dokumentacja Strona 75