Digilent Pmod CMPS2 Manual de referência - Página 8

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Pmod CMPS2™ Reference Manual

I2CWrite(0x20); //0x20 starts the SET action

14. Wait to receive an ACK from the Pmod CMPS2.

15. Delay at least 1 mS to allow the Pmod CMPS2 to finish the SET action.

16. Provide a START condition and call the device ID with a write bit

I2CBegin(0xA0); //device ID 0x30 with a write (0) bit

17. Wait to receive an ACK from the Pmod CMPS2.

18. Send the Internal Control Register 0 (address 0x07) as the register to communicate with

I2CWrite(0x07); //address 0x07 corresponds to Control Register 0

19. Wait to receive an ACK from the Pmod CMPS2.

20. Write the command to take a measurement by setting bit 0 high followed by a STOP bit.

I2CWrite(0x01); //0x01 initiates a data acquisition

21. Delay at least 7.92 mS by default to allow the Pmod CMPS2 to finish collecting data.

22. Provide a START condition and call the device ID with a write bit

I2CBegin(0xA0); //device ID 0x30 with a write (0) bit

23. Wait to receive an ACK from the Pmod CMPS2.

24. Send the Status Register (0x03) as the register to read

I2CWrite(0x03); //indicate you wish to interact with address 0x03

25. Provide a START condition and call the device ID with a read bit

I2CBegin(0xA1); //device ID 0x30 with a read (1) bit

26. Wait to receive an ACK from the Pmod CMPS2.

27. Cycle the SCL line to receive the Status Register data on the SDA line. Keep reading the Status Register by

repeating steps 8 through 13 until bit 0 is set to '1', indicating that the data on all 3 axes as available to be

read.

28. Provide a START condition and call the device ID with a write bit

I2CBegin(0xA0); //device ID 0x30 with a write (0) bit

29. Wait to receive an ACK from the Pmod CMPS2.

30. Send the first register address corresponding to Xout LSB (0x00) as the register to be read.

I2CWrite(0x00); //address 0x00 as the first register to be read

31. Provide a START condition and call the device ID with a read bit

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