Introduction - If you have any usage issues, please Google them yourself
reg [7:0] RxD_data
always @(posedge clk)
if(Baud8Tick && next_bit && state[3]) RxD_data <= {~RxD_bit_inv, RxD_data[7:1]}
That s it! The complete code can be found here.
It has a few improvements follow the comments in the code.