michinyon:
I am starting to understand your problem with the pins. You have 8 pins ?There will be
(1) a ground
(2) a power supply ( sometimes 2 )
(3) 2 pins for I2C
(4) maybe a third pin for Spi in addition to I2c
(5) maybe an interrupt out from the device
(6) maybe some kind of sleep pin
(7) maybe some kind of I2c address select pin.Here's what I would do.
Write a list of the actual pins on the actual sensor chip ( from the freescale datasheet ).
Read the instructions of the parallax device using the same chip, and make notes of what the module connection pins on that
device are, your set of pins is probably the same or almost the same.Examine the pins on this module, which also uses the same chip. Your pins are probably the same.
http://arduino-info.wikispaces.com/accelerometer-MMA7455Examine your module with a magnifying glass, try to see which pins are connected to which pins on the actual chip.
Look at the description of this device
Arduino Playground - HomePageLook at the description of this device
http://numato.com/mma7455-3-axis-digital-accelerometer-moduleIs there a voltage regulator chip on your module ? The connections of that will tell you something.
Good luck. Be methodical. Try not to blow it up.
IT IS NOT AN ANALOG DEVICE. You need I2C to communicate with it.
hi michinyon,
as, I've mention I i have very little knowledge in Electronics... I had a lot to absorb in a sort amount of time. My post was out of frustration. anyway thanks for the help... I got it working already.
I somehow given up and started reading more... apparently the pin description given to me was wrong and i had to analyze the module like you've said..
pins were:
1-GRD
2-VCC
4 - CS
3 -INT 2
5 and 6 -SCK and SDA
7-SDO
8 INT 1
got it working fine with uno... but cant get the same readings with DUE..
I had modified the Wire.h for the DUE I2C to work but the readings seems to be off