FC_IO_In Class Reference

Logic input. More...

Inheritance diagram for FC_IO_In:

Public Member Functions
	FC_IO_In (U32 width=1)
U32	GetIn ()
	Read signal. The signal value is copied to the least significant bits.
	operator U32 ()
	Read signal. The signal value is copied to the least significant bits.

Detailed Description

Logic input.

Adds to interface:
if width = 1 then
<name> : in std_logic
if width > 1 then
<name> : in std_logic_vector(width-1 downto 0)
where <name> is c++ object name.
Any number of instances are allowed.

// This is an example that show how to use the FC_IO_Out and FC_IO_In classes.
// When x changes the busy signal goes high and the square root is calculated.
// When the result is ready busy goes low.
#include <math.h>
#include "fc_io.h"
#include "fc_system.h"
 
int main()
{
    //% hw_begin
    FC_IO_Clk clk(100);
    FC_IO_Out y(32);
    FC_IO_In x(32);
    FC_IO_Out busy;
    //% hw_end
 
    int previous_x=0;
    for (;;)
    {   
        if(previous_x != x ) {
            busy = 0x1;
            y = int(  sqrtf( x )  );
            previous_x = x;
            busy = 0x0;
        }
    }
}

Constructor & Destructor Documentation

FC_IO_In()

FC_IO_In::FC_IO_In ( U32  width = 1 )

inline

Constructor

Parameters

width

Width of the input signal. Must be in range 1 to 32.