Rainbow Electronics MAX1618 - Manual (Page 15)

MAX1618
Remote Temperature Sensor
with SMBus Serial Interface
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/* Beginning of the header file which sets the constants */
int NumStates = 10;
int RRTE = 1; /* 0x01, command for reading remote temp
register */
int
WCA = 9; /* 0x09, command for writing configuration
register */
int
RSL = 2; /* 0x02, command for reading status register */
int WRHA = 13; /* 0x0D, command for writing remote THIGH limit
register */
int
WRLN = 14; /* 0x0E, command for writing remote TLOW limit
register */
int
NoError = 0;
int Nobody = 0;
int MAX1618Addr = 84; /* 0x54, default address for MAX1618,
ADD0,ADD1=open */
int InitConfig = 8; /* 0x08 , configure MAX1618 to MASK=0 and
RUN/STOP=0 */
int
HighAdder = 2; /* 2oC offset for calculating THIGH limit */
int LowSubtracter = 4; /* 4oC offset for calculating TLOW limit
*/
int
CollisionMask = 1; /* 0x01, mask for status bit that
indicates collision */
int
DiodeFaultMask = 4; /* 0x04, mask for the OPEN diode fault
status bit */
int
TempChangeMask = 24; /* 0x18, mask for RHIGH and RLOW status
bits */
array State[0..NumStates] of int;
State[0] = -65 oC /* At or above this temperature CPU duty cycle is
100% */
State[1] = 72 oC /* At or above this temperature CPU duty cycle is
87.5% */
State[2] = 74 oC /* At or above this temperature CPU duty cycle is 75%
*/
State[3] = 76 oC /* At or above this temperature CPU duty cycle is
62.5% */
State[4] = 78 oC /* At or above this temperature CPU duty cycle is 50%
*/
State[5] = 80 oC /* At or above this temperature CPU duty cycle is
37.5% */
State[6] = 82 oC /* At or above this temperature CPU duty cycle is 25%
*/
State[7] = 84 oC /* At or above this temperature CPU duty cycle is
12.5% */
State[8] = 86 oC /* At or above this temperature CPU duty cycle is
0.0% */
State[9] = 88 oC /* At or above this temperature SHUT SYSTEM OFF! */
State[10] = 127 oC
/* Extra array location so looping is easier */
/* End of the header file */
Listing 1. Pseudocode Example