is it possible for bcd to ascii module?

1. Ensure that BCD is in range of borders 0...99
2. Per Byte: Byte to Hi/Lo nibble ( shift by 4 and with 0x0F for hi, and 
with 0x0F for lo nibble)
3. Per Nibble: ASCII = nibblevalue + 0x30

See also wiki

ASCII      char 0x30 = '0'

Something like

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module bcd2ascii #(

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    parameter N_DIGITS = ...

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) (

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    input wire [4*N_DIGITS-1:0] bcd_in,

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    output reg [8*N_DIGITS-1:0] ascii_out

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);

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integer i;

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always @ (*) begin

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    for (i = 0; i < N_DIGITS; i = i + 1) begin

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        ascii_out[i * 8 +: 8] = 8'h30 + bcd_in[4 * i +: 4];

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    end

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end

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endmodule

Could be what you need. It would require some effort on your part to 
adapt this to your needs and make sure that it works. You didn't mention 
language, so I assumed Verilog.

what does this statement mean =(" parameter N_DIGITS = ...")
Can you please explain, it's a bit of an emergency

can anyone help me to wrie a multichannnel UART verilog code?