CFA633-RDI-KS datasheet(37/88 Pages) CRYSTAIFONTZ

37 / 88 page

Crystalfontz America, Inc.

Data Sheet Release Date 2012/02/21

www.crystalfontz.com

CFA633-RDI-KS LCD Module (Hardware v2.0 / Firmware s2v1)

February 2012

Page 37

The following C function will decode the fan speed from a Fan Speed Report packet into RPM:

int OnReceivedFanReport(COMMAND_PACKET *packet, char * output)

{

int

return_value;

return_value=0;

int

number_of_fan_tach_cycles;

number_of_fan_tach_cycles=packet->data[1];

if(number_of_fan_tach_cycles<3)

sprintf(output," STOP");

else if(number_of_fan_tach_cycles<4)

sprintf(output," SLOW");

else if(0xFF==number_of_fan_tach_cycles)

sprintf(output," ----");

else

{

//Specific to each fan, most commonly 2

int

pulses_per_revolution;

pulses_per_revolution=2;

int

Fan_Timer_Ticks;

Fan_Timer_Ticks=(*(unsigned short *)(&(packet->data[2])));

return_value=((27692308L/pulses_per_revolution)*

(unsigned long)(number_of_fan_tach_cycles-3))/

(Fan_Timer_Ticks);

sprintf(output,"%5d",return_value);

}

return(return_value);

}

0x82: Temperature Sensor Report

If any of the up to 32 temperature sensors is configured to report to the host, the CFA633 will send Temperature Sensor

Reports for each selected sensor every second. See the command 19 (0x13): Set Up Temperature Reporting (Pg. 48).

type = 0x82

data_length = 4

data[0] is the index of the temperature sensor being reported:

0 = temperature sensor 1

1 = temperature sensor 2

. . .

31 = temperature sensor 32

data[1] is the MSB of Temperature_Sensor_Counts

data[2] is the LSB of Temperature_Sensor_Counts

data[3] is DOW_crc_status

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