jackcartersmith/Speech256
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Re-instated the PWMDAC, as SDDAC will sound sh*t without a proper interpolator

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This commit is contained in:
Niels Moseley 2017-10-26 16:56:55 +02:00
parent a2432a5e55
commit 5d7c52c0e7
1 changed files with 16 additions and 16 deletions
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32
boards/Digilent DE0/speech256_de0.v
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@ -5,7 +5,7 @@
// http://www.moseleyinstruments.com // http://www.moseleyinstruments.com
// //
`define USE_SDDAC //`define USE_SDDAC
module Speech256_DE0 ( module Speech256_DE0 (
CLOCK_50, CLOCK_50,
@ -27,7 +27,7 @@ module Speech256_DE0 (
reg [3:0] divcnt; // clock divider counter reg [3:0] divcnt; // clock divider counter
reg [2:0] cur_state, next_state; reg [2:0] cur_state, next_state;
reg [2:0] rom_addr; reg [3:0] rom_addr;
reg [5:0] rom_data; reg [5:0] rom_data;
reg inc_rom_addr; reg inc_rom_addr;
@ -94,7 +94,8 @@ module Speech256_DE0 (
case(cur_state) case(cur_state)
S_IDLE: S_IDLE:
begin begin
if ((ldq == 1) && (BUTTON[0] == 1)) //if ((ldq == 1) && (BUTTON[0] == 1))
if (ldq == 1)
begin begin
inc_rom_addr <= 1; inc_rom_addr <= 1;
next_state <= S_ALLOPHONE; next_state <= S_ALLOPHONE;
@ -111,7 +112,6 @@ module Speech256_DE0 (
begin begin
if (ldq == 0) if (ldq == 0)
begin begin
inc_rom_addr <= 1;
next_state <= S_IDLE; next_state <= S_IDLE;
end end
end end
@ -124,30 +124,30 @@ module Speech256_DE0 (
// allophone ROM // allophone ROM
// hello, world // hello, world
case (rom_addr) case (rom_addr)
3'd0: 4'd0:
rom_data <= 6'h1B; rom_data <= 6'h1B;
3'd1: 4'd1:
rom_data <= 6'h07; rom_data <= 6'h07;
3'd2: 4'd2:
rom_data <= 6'h2D; rom_data <= 6'h2D;
3'd3: 4'd3:
rom_data <= 6'h35; rom_data <= 6'h35;
3'd4: 4'd4:
rom_data <= 6'h03; rom_data <= 6'h03;
3'd5: 4'd5:
rom_data <= 6'h2E; rom_data <= 6'h2E;
3'd6: 4'd6:
rom_data <= 6'h1E; rom_data <= 6'h1E;
3'd7: 4'd7:
rom_data <= 6'h33; rom_data <= 6'h33;
3'd8: 4'd8:
rom_data <= 6'h2D; rom_data <= 6'h2D;
3'd9: 4'd9:
rom_data <= 6'h15; rom_data <= 6'h15;
3'd10: 4'd10:
rom_data <= 6'h03; rom_data <= 6'h03;
default: default:
rom_data <= 6'h00; rom_data <= 6'h03;
endcase endcase
end end