Lecture 30 - 0416

Assignment:

Check out the following repository in CCS
https://github.com/vt-ece2534-s18/msp432-i2c-1

Develop the function unsigned ReadLight() in the subrepo msp432-i2c-1-initial.

You need the following manuals
	- Light sensor datasheet
	- Boost XL manual
	- Launchpad manual
	- Driverlib manual

Purpose of ReadLight():
	- This function reads the current output of the light sensor
	- It also programs the low/high threshold levels such that
	  the INT pin on the light sensor chip is asserted (active low)
	  when the light level is below the low threshold (LED ON)
	  or the light level is above the high threshold (LED OFF)
	  
Approach?

   1. Study schematics
      - Electrical connectivity
	  - GPIO connectivity for additional interrupts

   2. Study Data Sheet
      - I2C Slave Address
	  - I2C Transfers
      - Register set
	  - Bit field definition
	  - Internal operation

   3. Build programming sequence
      - Low-level connectivity
	  - Initialization and configuration
	  - Data transfers

   4. Integration
      - Testing and Debugging
      - Refactoring in .h and .c files

Driverlib calls

    I2C_initMaster
    I2C_setSlaveAddress
    I2C_enableModule

    I2C_setMode
    I2C_isBusBusy
	
    I2C_masterSendMultiByteStart
    I2C_masterSendMultiByteNext
    I2C_masterSendMultiByteFinish

    I2C_masterSendSingleByte
	
    I2C_masterReceiveStart
    I2C_masterReceiveMultiByteNext
    I2C_masterReceiveMultiByteFinish

	I2C_masterReceiveSingleByte
	
    I2C_getInterruptStatus