- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hello.
The basic cell in Intel FPGA have a wonderful architecture, including dedicated synchronous signals as enable, sload and sclear. However, describe the use of this resources is not easy in vhdl for me. I use "process" only for declare hardware associated whit registers. Declare "enable" is easy: if (enable) then --this use enable dedícate port q <= xxxx; end if; Declare "sclear"... if (sclr) then --this use in RTL and Chip Planner a mux! i want sclr dedícate port q <= (others => '0'); end if; Declare "enable" and "sclear" use two mux. Now don't use enable dedícate port. How can use these precious resourses, synchronous dedícate ports? Thanks!! [sub][/sub]Link Copied
1 Reply
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
You can access a complete template for all secondary control signals using the Edit menu in the Quartus text editor. But here is a similar complete template. Just remove the signals you don't want to use:
ARCHITECTURE behavior OF dff IS
BEGIN
PROCESS(clk, aclr, apre, aload, adata)
BEGIN
IF aclr = '1' THEN
q <= '0';
ELSIF apre = '1' THEN
q <= '1';
ELSIF aload = '1' THEN
q <= adata;
ELSIF rising_edge(clk) THEN
IF ena = '1' THEN
IF sclr = '1' THEN
q <= '0';
ELSIF sload = '1' THEN
q <= sdata;
ELSE
q <= d;
END IF;
END IF;
END IF;
END PROCESS;
END ARCHITECTURE behavior;
Reply
Topic Options
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page