RoboteQ AX2850 user manual Temperature Conversion C Source Code

Temperature Conversion C Source Code

	300
	250
Value	200
Analog	150
Reported	100
	50
	0
	-40	-30	-20	-10	0	10	20	30	40	50	60	70	80	90	100	110	120	130	140	150

Temperature in Degrees C

FIGURE 39. Analog reading by controller vs. internal heat sink temperature

Temperature Conversion C Source Code

The code below can be used to convert the analog reading into temperature. It is provided for reference only. Interpolation table is for the internal thermistors.

int ValToHSTemp(int AnaValue)

{

// Interpolation table. Analog readings at -40 to 150 oC, in 5o intervals

int TempTable[39] ={248, 246, 243, 240, 235, 230, 224, 217, 208, 199, 188, 177, 165, 153, 140, 128, 116, 104,93, 83, 74, 65, 58, 51, 45, 40, 35, 31, 27, 24, 21, 19, 17, 15, 13, 12, 11, 9, 8};

int LoTemp, HiTemp, lobound, hibound, temp, i;

i = 38;

while (TempTable[i] < AnaValue && i > 0) i--;

if (i < 0) i = 0;

if (i == 38) return 150;

else

{

LoTemp = i * 5 - 40;

HiTemp = LoTemp + 5; lobound = TempTable[i]; hibound = TempTable[i+1];

temp = LoTemp + (5 * ((AnaValue - lobound)*100/ (hibound - lobound)))/100; return temp;

}

}

AX2550 Motor Controller User’s Manual 69