3-Axis Accelerometer (LIS302DL)

[Gusse]

Here is an updated demo code for LIS302DL with Nokia 3310 LCD. This shows all three axis with bar graphics and numbers.

Also small video clip, which shows how the system works (I'm rotation PIC and LIS302DL in my hand) http://kotiweb.kotiportti.fi/karl-er...C/LIS302DL.wmv.

My test bench for accelerometer (add-on board) http://kotiweb.kotiportti.fi/karl-er...d_LIS302DL.gif.

And here is the code.

BR,
-Gusse-

EDIT: If your screen is too light or too dark then tune "Contrast" value. I have noticed that there are differences between new and old 3310 LCD displays (tested both).

[alexpanrui]

my lis302dl is not working properly.....no matter which register i tried to read, the data is always 0xFF....shouldnt be right according to the datasheet....even the Who_AM_I register gave me 0xFF...BTW the sensor was working few days a ago. is it detected?help.....

[alexpanrui]

I am using PIC16f877 to interface with LIS302DL. I browsed through some threads available over the net. They said we need to add pullups at the data lines and SCL. why? I dont include any pullups. i just directly connect the sensor to the PIC. anything wrong?

[alexpanrui]

SPI is used for my case

[Gusse]

Can you share your schematic and code?

I'm not so familiar with SPI interface, but could you change LIS302DL to I2C mode (pin7, CS tight to VCC and pin12 GND) and try to read registers then? Then pull-ups are needed (4k7 for both CLK and SDA).

-Gusse-

[alexpanrui]

sry, i forgot to mention that the sensor was working before. I read the datasheet again. i noticed that the absolute max rating for Vin (input voltage for all control pins) is from -0.3v to VDD_IO+0.3 v. I hooked up VDD-IO to 3v. so based on the max rating, the input voltage should be no more than 3.3v. But the output high voltage from PIC is ard 4.5v. Could this be the reason that the sensor stops working?

[Gusse]

It might be that device get damaged if Vdd_IO is too much higher than Vdd (spec says Vdd + 0.1V). On the otherhand, I have used 5V (4.95V) for both Vdd and Vdd_IO without any problems or damages, PIC is also running on 5V. Absolute maximum voltage for LIS302DL is +6V (both Vdd and Vdd_IO).

Can you measure how much current accelerometer is taking from supply?

-Gusse-