SCP1000 I2C

Development Boards MicroMod
1

Hi all

I am currently trying the SCP1000 in I2C with my MSP430F2619 board.

I also have a LIS331DLH ( I2C too ), and I can communicate with the LIS331DLH without any problem.

But when I try to communicate with the SCP1000, every register I read returns 0xFF …

My sequence is the following :

  • power ON the SCP1000

  • wait several seconds

  • send 0x0A to register 0x03 ( config = Stand-alone, high resolution )

  • check if DRDY pin is high

  • read DATARD16 registers ( 0x80 )

First, the DRDY pin is ALWAYS high … it never goes down.

Then, the value I read in DATARD16 is 0xFFFF.

I also tried to read the REVID register ( 0x00 ), and it also returns me 0xFF.

Any idea ?

Thanks.

2

I’m having the same problem. I have also tried reading the status register and get the same 0xFF.

I do get a pulse of ~20ms from the DRDY pin when my sketch runs.

I know that SparkFun sells the SPI version of this device so maybe no one here has used the TWI version.

Any help would be appreciated.

3

Problem still not solved …

I watch the lines with a scope, and I can see that the SCP1000 is well responding to its address ( he sends ACKs ) …

But still every registers reading gives 0xFF.

4

Toufinet:
Problem still not solved …

I watch the lines with a scope, and I can see that the SCP1000 is well responding to its address ( he sends ACKs ) …

But still every registers reading gives 0xFF.

Did you figure out how to get the Wire library to issue the repeated start condition without issuing a stop condition beforehand?

5

Oops, sorry, I wasn’t paying attention to the sub forum we are in. You are not using an Arduino.