Quick Porting Guide

Add the following codes for your platform and you are pretty much ready to go.

sensor_driver_test.c: main program

• Add the time delay function

  #define DELAY_MS(ms)	//.....     /* Add your time delay function here */
  

• Add HW initialization

  /* Add your HW initialization code here
   ...
   ...
   ...
   ...
   */
  

gSensor_autoNil.c

• Add the time delay function

  #define DELAY_MS(dt)	//.....     /* Add your time delay function here */
  

bus_support.c

• Add I2C read/write function pointer to your I2C functions

  pbus->bus_read = I2C_read_bytes;    /* Put your I2C read function pointer here */
  pbus->bus_write = I2C_write_bytes;  /* Put your I2C write function pointer here */
  

Your I2C read/write functions should implement the following interface:

```
//******************************************************************************
//
//! @brief Read multiple bytes from I2C slave with address devAddr
//!
//! @param devAddr 7-bit device slave address
//! @param regAddr start register address
//! @param dataBuf data byte array to store the reading
//! @param len number of data to be read
//
//! @return number of bytes read
//
//******************************************************************************
char I2C_read_bytes(unsigned char devAddr, 
					unsigned char regAddr, 
					unsigned char* dataBuf, 
					unsigned char len)
 {
  /* ..... */
 }

//******************************************************************************
//
//! @brief Write multiple bytes to I2C slave with address devAddr
//!
//! @param devAddr 7-bit device slave address
//! @param regAddr register address
//! @param dataBuf data bytes array buffer with datas to write
//! @param len number of bytes to write
//!
//! @param return number of byte written
//
//******************************************************************************
char I2C_write_bytes(unsigned char devAddr,
                     unsigned char regAddr,
					 unsigned char* dataBuf,
					 unsigned char len)

{
 /* ..... */
}
```

Default gma306_initialization function in gma306.c

Default initialization actions:

• Turn on offset temperature compensation
• Set to continuous mode
• Turn on low pass filter
• Set data ready INT, ative high, push-pull You may change the behavior of this initialization function to suit your purpose. Please refer to datasheet for more details on the register settings.

Usage of AutoNil

• The program will do an offset AutoNil when executed. Hold the g-sensor steady and maintai in level, then press 'y' after the program prompt for input.
• You may change the DATA_AVE_NUM macro in the gSensor_autoNil.h for the moving averae order for the offset estimation. Defautl is 32.