RabbitCore eDisplay OP7200, Руководство пользователя

Страница: 72 / 174

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
0
GAIN_X1
×1
1
GAIN_X2
×2
2
GAIN_X4
×4
3
GAIN_X5
×5
4
GAIN_X8
×8
5
GAIN_X10
×10
6
GAIN_X16
×16
7
GAIN_X20
×20