| Line 4... |
Line 4... |
)
|
)
|
|
|
(
|
(
|
input wire clk,
|
input wire clk,
|
input wire reset,
|
input wire reset,
|
input wire [6:0] char_column, // character number on the current line
|
|
input wire [6:0] char_line, // line number on the screen
|
|
input wire [2:0] subchar_line, // the line number within a character block 0-8
|
input wire [2:0] subchar_line, // the line number within a character block 0-8
|
input wire [2:0] subchar_pixel, // the pixel number within a character block 0-8
|
input wire [2:0] subchar_pixel, // the pixel number within a character block 0-8
|
|
|
input wire [7:0] ascii_code,
|
input wire [7:0] ascii_code,
|
|
|
output wire pixel_on,
|
output wire pixel_on,
|
|
|
output reg [13:0] char_read_addr,
|
input wire [13:0] char_read_addr,
|
|
|
input wire [13:0] char_write_addr,
|
input wire [13:0] char_write_addr,
|
input wire [7:0] char_write_data,
|
input wire [7:0] char_write_data,
|
|
input wire [7:0] char_gen_rom_data,
|
input wire char_write_enable
|
input wire char_write_enable
|
|
|
);
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
always @ (*)
|
|
begin
|
|
char_read_addr = (char_line[6:0] * H_ACTIVE / 8 ) + {7'b0000000,char_column[6:0]};
|
|
end
|
|
|
|
|
|
|
|
|
|
// the character generator block includes the character RAM
|
// the character generator block includes the character RAM
|
// and the character generator ROM
|
// and the character generator ROM
|
`VARIANT`CHAR_GEN
|
`VARIANT`CHAR_GEN
|
|
|
CHAR_GEN
|
CHAR_GEN
|
| Line 48... |
Line 36... |
.char_write_data ( char_write_data ), // write data
|
.char_write_data ( char_write_data ), // write data
|
.char_write_enable ( char_write_enable ), // write enable
|
.char_write_enable ( char_write_enable ), // write enable
|
.char_read_addr ( char_read_addr ), // read address of current character
|
.char_read_addr ( char_read_addr ), // read address of current character
|
.subchar_line ( subchar_line ), // current line of pixels within current character
|
.subchar_line ( subchar_line ), // current line of pixels within current character
|
.subchar_pixel ( subchar_pixel ), // current column of pixels withing current character
|
.subchar_pixel ( subchar_pixel ), // current column of pixels withing current character
|
|
.char_gen_rom_data ( char_gen_rom_data ),
|
.pixel_on ( pixel_on ),
|
.pixel_on ( pixel_on ),
|
.ascii_code ( ascii_code )
|
.ascii_code ( ascii_code )
|
);
|
);
|
|
|
endmodule //CHAR_DISPLAY
|
endmodule //CHAR_DISPLAY
|
