MMA7455 acclelerometer with Basic stamp2

karthik9

hi ,
im facing problem with the accelerometer MMA7455 when i tried to program it with BASIC STAMP. I used the same code given in the "Downloads and Resources " menu and im getting the output as
X=-1
Y=-1
Z=-1
and there is no response from the sensor module....could you guys help me with the problem .
Thanks

Mike Green

You need to provide a schematic showing exactly how you have the accelerometer connected to the Stamp (not what you think you have ... draw the schematic from your actual connections). You should also provide your actual code as entered into the Stamp Editor. The examples provided should work as is ... they're tested, so there must be something different between what you've done and what's been shown.

karthik9

' *********

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**************************************
VDD<----| VIN *

---

* CLK--|

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>PIN 0 of Basic stamp
N/C

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| N/C *

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* DATA |

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>PIN 1
N/C

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| INT1*

---

* CS ---|

---

>PIN 2
N/C

---

| INT2*

---

* GND -|

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>VSS
**********

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**************************************
............ACCELEROMETER..................................................

Mike Green

There's nothing wrong with the Demo and you seem to have followed the directions in the Demo for wiring. There's no reason why it shouldn't work as described in the Demo. I assume that when you say "PIN 0 of Basic stamp" that you're referring to I/O pin #0 as shown on the board next to the breadboard socket on the Stamp board (not the physical pin # on the Stamp module);

I suggest you call Parallax Tech Support tomorrow. Sometimes a real-time discussion can uncover the differences between what you have and what you should have that can take forever in a forum setting.

karthik9

yes it is PIN 0 next to bread board socket... and thanks Mike

karthik9

it is the problem with my BS2 IC..... Replaced it... working fine now