Digi RCM4000 user manual Float anaInVoltsunsigned int channel, unsigned int gaincode

float anaInVolts(unsigned int channel, unsigned int gaincode);

Reads the state of a single-ended analog input channel and uses the previously set calibration constants to convert it to volts.

PARAMETERS

channel is the channel number (0 to 7) corresponding to LN0_IN to LN7_IN

Channel Code	Single-Ended	Voltage Range†
	Input Lines*	(V)
0	+AIN0	0–22.5
1	+AIN1	0–22.5
2	+AIN2	0–22.5
3	+AIN3	0–22.5
4	+AIN4	0–22.5
5	+AIN5	0–22.5
6	+AIN6	0–22.5
7	+AIN7	0–2‡

* Negative input is ground.

† Applies to Prototyping Board.

‡ Used for thermistor in sample program.

gaincode is the gain code of 0 to 7.

Gain Code	Multiplier	Voltage Range*
		(V)
0	×1	0–22.5
1	×2	0–11.25
2	×4	0–5.6
3	×5	0–4.5
4	×8	0–2.8
5	×10	0–2.25
6	×16	0–1.41
7	×20	0–1.126

* Applies to RCM3400 Prototyping Board.

RETURN VALUE

A voltage value corresponding to the voltage on the analog input channel. ADOVERFLOW (defined macro = -4096) if overflow or out of range.

ADTIMEOUT (defined macro = -4095) if conversion is incomplete or busy-bit timeout.

SEE ALSO

anaInCalib, anaIn, anaInmAmps, brdInit

54 RabbitCore RCM4000