How to compare input value to previous value by number of counts

Hello all,

I have a module takes in input [15:0] in and I want to compare this new input to my previous value by number of counts.

module _update(input clk, input [15:0] in, ....)

reg [15:0] rPrev, rChange;

always @(posedge clk) begin

rPrev <= in;

end

always @(posedge clk) begin

if (in > rPrev)

rChange <= in - rPrev;

else if (in < rPrev)

rChange <= rPrev - in;

end

always @(posedge clk) begin

if (rPrev != in && rChange >= 50 && rChange <= 100) begin // rChange has to be in range 50 to 100 counts

// update

end

end

Am I doing this right?

Thanks,

Sean