nand2/02_Boolean_Arithmetic/Readme.md

02 Arithmetic Logic

Proceed and implement the chips HalfAdder, FullAdder, Add16, Inc16 and ALU.

Keep in mind the following remarks:

• in order to use the chips implemented in project 01_Boolean_Logic, they must be listed in the file Include.v, which can be found in every subfolder.

• you dan use a Buffer to split the signal wires. e.g. ng signal of ALU can be derived from out[15].

• clear cache every time you edit and change your implementation in the verilog file <chipname>.v.

• test your chip implementation with:

  $ cd <XX_chipname>
  $ apio clean
  $ apio sim
  

• the chip HalfAdder can be uploaded to iCE40HX1K-EVB and tested using BUT1/2 and LED1/2. Keep in mind, that due to pull up resistors at the buttons, the signals appear inverted:

  pin	function
  LED1/2	=0 led is off, =1 led is on
  BUT1/2	=0 button is pressed down, =1 button is released up