does it make any sensible sense to do any assert() here ? baud_generator.v
Someone told me the following but I do not quite understand. Could anyone elaborate ?
Quote:
I would create a counter on every new baud clock, and then assert that the counter counted up to between 4999 and 5001. You might be able to be tighter than that, but that'd depend upon how you truncated the final bits of the fraction.
// credit: Adapted from http://zipcpu.com/blog/2017/06/02/generating-timing.html
module baud_generator(clk, baud_clk); // we are obtaining baud_out = 9600bps = clk/5000 where clk = 48MHz
input clk;
output baud_clk;
reg ck_stb;
reg[31:0] counter = 0;
always @(posedge clk)
{ck_stb, counter} <= counter + 858993; // (2^32)/5000 ~= 858993 , actual baudrate = 9599.9949bps
// baud_out has a period of (1/9599.9949bps) or 104167ns
assign baud_clk = ck_stb;
endmodule
