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board_specific_top.sv
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`include "config.svh"
`include "lab_specific_board_config.svh"
module board_specific_top
# (
parameter clk_mhz = 50,
pixel_mhz = 25,
w_key = 4,
w_sw = 10, // One onboard SW is used as a reset
w_led = 8,
w_digit = 4,
w_gpio = 72, // GPIO_1[5:0] reserved for mic
// gpio 0..5 are reserved for INMP 441 I2S microphone.
screen_width = 640,
screen_height = 480,
w_red = 4,
w_green = 4,
w_blue = 4,
w_x = $clog2 ( screen_width ),
w_y = $clog2 ( screen_height )
)
(
input CLOCK_50,
input [ w_key - 1:0] KEY,
input [ w_sw - 1:0] SW,
output logic [ 9:0] LEDR,
output logic [ 7:0] LEDG,
output logic [ 6:0] HEX0, // HEX[7] aka dp are not connected to FPGA at DE1 board
output logic [ 6:0] HEX1,
output logic [ 6:0] HEX2,
output logic [ 6:0] HEX3,
output VGA_HS,
output VGA_VS,
output [ w_red - 1:0] VGA_R,
output [ w_green - 1:0] VGA_G,
output [ w_blue - 1:0] VGA_B,
output AUD_ADCLRCK,
input AUD_ADCDAT,
inout AUD_BCLK,
output AUD_DACLRCK,
output AUD_DACDAT,
output AUD_XCK,
output I2C_SCLK,
inout I2C_SDAT,
input UART_RXD,
output UART_TXD,
inout [ w_gpio / 2 - 1:0] GPIO_0,
inout [ w_gpio / 2 - 1:0] GPIO_1
);
//------------------------------------------------------------------------
localparam w_lab_sw = w_sw - 1; // One sw is used as a reset
//------------------------------------------------------------------------
wire clk = CLOCK_50;
wire rst = SW [w_lab_sw];
// Keys, switches, LEDs
wire [ w_lab_sw - 1:0] lab_sw = SW [w_lab_sw - 1:0];
// A dynamic seven-segment display
wire [ 7:0] abcdefgh;
wire [ w_digit - 1:0] digit;
// Graphics
wire display_on;
wire [ w_x - 1:0] x;
wire [ w_y - 1:0] y;
wire [ w_red - 1:0] red;
wire [ w_green - 1:0] green;
wire [ w_blue - 1:0] blue;
assign VGA_R = display_on ? red : '0;
assign VGA_G = display_on ? green : '0;
assign VGA_B = display_on ? blue : '0;
// Microphone, sound output and UART
wire [ 23:0] mic;
wire [ 15:0] sound;
//------------------------------------------------------------------------
wire slow_clk;
slow_clk_gen # (.fast_clk_mhz (clk_mhz), .slow_clk_hz (1))
i_slow_clk_gen (.slow_clk (slow_clk), .*);
//------------------------------------------------------------------------
lab_top
# (
.clk_mhz ( clk_mhz ),
.w_key ( w_key ),
.w_sw ( w_lab_sw ),
.w_led ( w_led ),
.w_digit ( w_digit ),
.w_gpio ( w_gpio ),
.screen_width ( screen_width ),
.screen_height ( screen_height ),
.w_red ( w_red ),
.w_green ( w_green ),
.w_blue ( w_blue )
)
i_lab_top
(
.clk ( clk ),
.slow_clk ( slow_clk ),
.rst ( rst ),
.key ( ~ KEY ),
.sw ( lab_sw ),
.led ( LEDG ),
.abcdefgh ( abcdefgh ),
.digit ( digit ),
.x ( x ),
.y ( y ),
.red ( red ),
.green ( green ),
.blue ( blue ),
.mic ( mic ),
.sound ( sound ),
.uart_rx ( UART_RXD ),
.uart_tx ( UART_TXD ),
.gpio ( { GPIO_0, GPIO_1 } )
);
//------------------------------------------------------------------------
wire [$left (abcdefgh):0] hgfedcba;
generate
genvar i;
for (i = 0; i < $bits (abcdefgh); i ++)
begin : abc
assign hgfedcba [i] = abcdefgh [$left (abcdefgh) - i];
end
endgenerate
//------------------------------------------------------------------------
`ifdef EMULATE_DYNAMIC_7SEG_ON_STATIC_WITHOUT_STICKY_FLOPS
// Pro: This implementation is necessary for the lab 7segment_word
// to properly demonstrate the idea of dynamic 7-segment display
// on a static 7-segment display.
//
// Con: This implementation makes the 7-segment LEDs dim
// on most boards with the static 7-sigment display.
// inverted logic
assign HEX0 = digit [0] ? ~ hgfedcba [$left (HEX0):0] : '1;
assign HEX1 = digit [1] ? ~ hgfedcba [$left (HEX1):0] : '1;
assign HEX2 = digit [2] ? ~ hgfedcba [$left (HEX2):0] : '1;
assign HEX3 = digit [3] ? ~ hgfedcba [$left (HEX3):0] : '1;
// positive logic
always_comb
begin
LEDR = '0;
for (int i = 0; i < w_digit; i ++)
LEDR [$bits (LEDR) - w_digit + i]
= digit [i] ? hgfedcba [$left (HEX0) + 1] : '0;
end
`else
always_ff @ (posedge clk or posedge rst)
begin
if (rst)
begin
{ HEX0, HEX1, HEX2, HEX3 } <= '1;
LEDR <= '0;
end
else
begin
if (digit [0]) HEX0 <= ~ hgfedcba [$left (HEX0):0];
if (digit [1]) HEX1 <= ~ hgfedcba [$left (HEX1):0];
if (digit [2]) HEX2 <= ~ hgfedcba [$left (HEX2):0];
if (digit [3]) HEX3 <= ~ hgfedcba [$left (HEX3):0];
for (int i = 0; i < w_digit; i ++)
if (digit [i])
LEDR [$bits (LEDR) - w_digit + i] <= hgfedcba [$left (HEX0) + 1];
end
end
`endif
//------------------------------------------------------------------------
`ifdef INSTANTIATE_GRAPHICS_INTERFACE_MODULE
wire [9:0] x10; assign x = x10;
wire [9:0] y10; assign y = y10;
vga
# (
.CLK_MHZ ( clk_mhz ),
.PIXEL_MHZ ( pixel_mhz )
)
i_vga
(
.clk ( clk ),
.rst ( rst ),
.hsync ( VGA_HS ),
.vsync ( VGA_VS ),
.display_on ( display_on ),
.hpos ( x10 ),
.vpos ( y10 ),
.pixel_clk ( )
);
`endif
//------------------------------------------------------------------------
`ifdef INSTANTIATE_MICROPHONE_INTERFACE_MODULE
inmp441_mic_i2s_receiver
# (
.clk_mhz ( clk_mhz )
)
i_microphone
(
.clk ( clk ),
.rst ( rst ),
.lr ( GPIO_1 [0] ),
.ws ( GPIO_1 [2] ),
.sck ( GPIO_1 [4] ),
.sd ( GPIO_1 [5] ),
.value ( mic )
);
assign GPIO_1 [1] = 1'b0; // GND
assign GPIO_1 [3] = 1'b1; // VCC
`endif
//------------------------------------------------------------------------
`ifdef INSTANTIATE_SOUND_OUTPUT_INTERFACE_MODULE
// DE1 onboard audio codec: WM8731
i2s_audio_out
# (
.clk_mhz ( clk_mhz )
)
i_audio_out
(
.clk ( clk ),
.reset ( rst ),
.data_in ( sound ),
.mclk ( AUD_XCK ),
.bclk ( AUD_BCLK ),
.lrclk ( AUD_DACLRCK ),
.sdata ( AUD_DACDAT )
);
// The audio codec configuration
I2C_AUDIO_Config
i_i2c_codec_conf (
.iCLK (clk),
.iRST_N (~rst),
.I2C_SCLK(I2C_SCLK),
.I2C_SDAT(I2C_SDAT),
.READY ()
);
`endif
endmodule