LMP91000_Arduino

Arduino library for the Texas Instruments LMP91000 configurable AFE potentiostat. Datasheet: http://www.ti.com/lit/ds/symlink/lmp91000.pdf Licensed under GNU General Public License.

LMP91000 lmp91000

Starts the class. lmp91000 can be replaced with the desired name. I will keep this name for the remaining commands though.

void lmp91000.begin(uint8_t pin)

Sets up the chip for usage. pin is optional, it is for the optional chip select. See page 24 of the datasheet.

uint8_t lmp91000.status()

Returns the status of the chip. 0 if not ready for new commands, 1 if it is ready. See datasheet page 21.

void lmp91000.lock()

Locks the registers from being written. This is the default. See datasheet page 21.

void lmp91000.unlock()

Allows the registers to be written. See datasheet page 21.

void lmp91000.ampGain(uint8_t gain)

Sets the gain of the transimpedance amplifier. See datasheet page 22. Options for gain are:

LMP91000_TIA_GAIN_EXT - External Reference, default
LMP91000_TIA_GAIN1 - 2.75 kOhm
LMP91000_TIA_GAIN2 - 3.5 kOhm
LMP91000_TIA_GAIN3 - 7 kOhm
LMP91000_TIA_GAIN4 - 14 kOhm
LMP91000_TIA_GAIN5 - 35 kOhm
LMP91000_TIA_GAIN6 - 120 kOhm
LMP91000_TIA_GAIN7 - 350 kOhm

void lmp91000.ampResist(uint8_t res)

Sets the load resistance of the transimpedance amplifier. See datasheet page 22. Options for res are:

LMP91000_RLOAD0 - 10 Ohm
LMP91000_RLOAD1 - 33 Ohm
LMP91000_RLOAD2 - 50 Ohm
LMP91000_RLOAD3 - 100 Ohm, default

void lmp91000.refSource(uint8_t source)

Reference voltage source selection. See datasheet page 22. Options for source are:

LMP91000_REF_INT - internal voltage reference, default
LMP91000_REF_EXT - external voltage reference

void lmp91000.internalZero(uint8_t select)

Internal zero selection (percentage of the source reference). See datasheet page 22. Options are:

LMP91000_INT_Z0 - 20%
LMP91000_INT_Z1 - 50%, default
LMP91000_INT_Z2 - 67%
LMP91000_INT_BY - Internal zero circuitry bypassed (only in O2 ground referred measurement)

void lmp91000.biasSign(uint8_t sign)

Selection of the bias polarity. See datasheet page 22. Options are:

0 or LMP91000_BIAS_NEG - Negative (VWE – VRE)<0V, default
1 or LMP91000_BIAS_POS - Positive (VWE-VRE)>0V

void lmp91000.biasSelect(uint8_t bias)

Bias selection (Percentage of the source reference). See datasheet page 22. Options are:

LMP91000_BIAS0 - 0%, default
LMP91000_BIAS1 - 1%
LMP91000_BIAS2 - 2%
LMP91000_BIAS3 - 4%
LMP91000_BIAS4 - 6%
LMP91000_BIAS5 - 8%
LMP91000_BIAS6 - 10%
LMP91000_BIAS7 - 12%
LMP91000_BIAS8 - 14%
LMP91000_BIAS9 - 16%
LMP91000_BIAS10 - 18%
LMP91000_BIAS11 - 20%
LMP91000_BIAS12 - 22%
LMP91000_BIAS13 - 24%

void lmp91000.shortFet(uint8_t fet)

Sets or removes the shorting FET feature. See datasheet page 23. Options are:

0 or LMP91000_FET_DIS - disabled, default
1 or LMP91000_FET_ENA - enabled

void lmp91000.opMode(uint8_t mode)

Mode of operation selection. Datasheet page 23. Options are:

LMP91000_OP_MODE0 - deep sleep, default
LMP91000_OP_MODE1 - 2-lead ground referred galvanic cell
LMP91000_OP_MODE2 - Standby
LMP91000_OP_MODE3 - 3-lead amperometric cell
LMP91000_OP_MODE4 - temperature measurement (TIA off)
LMP91000_OP_MODE5 - temperature measurement (TIA on)

Molorius/LMP91000_Arduino