Rabbit OP7100 User Manual download pdf (Page 72)

66 eDisplay (OP7200)

Calibrates the response of the A/D converter channel as a linear function using the two conversion points

provided. Four values are calculated and placed into global table

_adcCalib to be stored later into

using the function

anaInEEWr(). Each channel will have the following information:

a linear constant,

a voltage offset,

a calculation gain code used to calculate calibrations, and

a user gain code to set voltage range (defaults to the calculation gain code).

PARAMETERS

channel is the analog input channel number (0 to 7) corresponding to AIN0–AIN7:

opmode is the mode of operation:

0 = SE_MODE—single-ended input line

1 = DIFF_MODE—differential input line

2 = mAMP_MODE—4–20 mA input line

gaincode is the gain code of 0 to 7 for both single-ended and differential measurements:

int anaInCalib(int channel, int opmode,

int gaincode, int value1, float volts1,

int value2, float volts2);

channel

Single-Ended Input Differential Input

0 +AIN0 +AIN0 -AIN1

1 +AIN1 —

2 +AIN2 +AIN2 -AIN3

3 +AIN3 —

4 +AIN4 +AIN4 -AIN5

5 +AIN5 —

6 +AIN6 +AIN6 -AIN7

7 +AIN7 —

Gain Code Macro Gain

GAIN_X1

×1

GAIN_X2

×2

GAIN_X4

×4

GAIN_X5

×5

GAIN_X8

×8

GAIN_X10

×10

GAIN_X16

×16

GAIN_X20

×20

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Rabbit OP7100 User Manual Page 72

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