Greetings,
I am currently using and LMP91000evm in Stand Alone Mode with a MSP4305529. I have attempted three demos out of the 4 provided in the MSP430 and LMP91000 library.
Demo 1 blinks a LED if the MSP430 can read/write to the LMP91000 registers; this demo executed successfully.
Demo 2 takes temperature readings from the LMP dvm, these temperatures are averaged out and the results can be seen in a window in the debugger. The LMP91000 data sheet provides a table with corresponding temperatures and there digital values.
When I compare the results in my debugger they do not match the numbers in the data sheet. I am not sure what I am supposed to be looking for, or if there is an error occurring. This is what I see on my screen:
this is also a pic of results Ive obtained:
Demo 3 takes a measurement from the Vout without a sensor. The demo indicates that the reading should be a value of 1.67 Volts. Again I am not getting the indicated values in my debugger. This is what I see:
and this after a few runs:
My connections and voltages are as follows:
Vdd = 3.3V
Vref = 2.5 V
Jmenb = pin 2 and 3 shorted; to P2.6
stand alone mode; I2C communication from MSP4305529 and LMP91000
P3.0 and P3.1 for the SCL and SDA; along with two 10k pull-up resistors
Vout to P6.0
I would like to resolve these issues and continue development. Can someone please offer some guidance or explanation of my results.
Regards,
Jonathan Velez