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Zipping and Unzipping data onto ports

The zip module can input words from a 4-bit port, and output words to a 4-bit port as if these were four 1-bit ports.

API

void outputWordsZipped(buffered out port:32 p, int b0, int b1, int b2, int b3)

Function that outputs 4 words to a single 4-bit buffered port.

Each word is output to one of the 4 bits serialised.

Parameters:

• p – port to output to
• b0 – word to output to bit 0 of port p
• b1 – word to output to bit 1 of port p
• b2 – word to output to bit 2 of port p
• b3 – word to output to bit 3 of port p

{int,int,int,int} i inputWordsZipped(buffered in port:32 p)

Function that inputs 4 words from a single 4-bit buffered port.

Each word is input from one of the 4 bits serialised.

Parameters:

• p – port to input from

Returns:

the four words, the first word is bit 0, the 4th return value is bit 3

Example

An example program is shown below. An input and/or output ports should be declared as buffered ports:

A function is called to output data, or to input data:

If you want to do both simultaneously, you will need to manually interleave the source code of the two functions.