Welcome in the forum Roshandel.
I would suggest you to use I2C interface. Wire your ADXL345 as shown in the datasheet.
Are you using a Cypress development/prototyping Kit? Which one??
Place an I2C Master component onto your topdesign. Do not forget the required pullup resistors. ADXL's I2C address will be 0x1D or 0x52 depending on the level of the AltAddress pin.
Byte I2C interface is quite simple: After setting up the component and starting it you use
I2C_MasterSendStart(DeviceAddress,I2C_WRITE_XFER_MODE); // Initialize a transaction for writing
I2C_MasterWriteByte(Register); // Indicate which register you want to write to
I2C_MasterWriteByte(Value); // Write to register
I2C_MasterSendStop(); // End of transaction
When you want to read from a device you use (example for reading two bytes
I2C_MasterSendStart(DeviceAddress,I2C_WRITE_XFER_MODE); // Initialize a transaction for writing
I2C_MasterWrite(Register); // Indicate which register you want to write to
I2C_MasterSendRestart(DeviceAddress,I2C_READ_XFER_MODE);
I2C_MasterReadByte(I2C_ACK_DATA); // Read from register
I2C_MasterReadByte(I2C_NAK_DATA); // Read from register, last byte is NAKed
I2C_MasterSendStop(); // End of transaction
Not too difficult. Keep in mind that most of the APIs (except those for reading a byte) return a status byte which, when non-zero indicate an error condition.
The high-level APIs must be used in this way:
Writing to slave Count bytes
I2C_MasterWriteBuf(SlaveAddress,DataPtr,Count,I2C_MODE_COMPLETE_XFER);
Reading from Slave sending register byte first:
I2C_MasterWriteBuf(SlaveAddress,&RegAddress,1,I2C_MODE_NO_STOP);
I2C_MasterReadBuf(SlaveAddress,DataPtr,Count,I2C_MODE_REPEAT_START);
Bob
