+`include "pll.v"
`include "gc.v"
`include "eval.v"
`include "reader.v"
`include "uart.v"
`include "writer.v"
+`include "controller.v"
`define GCOP_NOP 4'd0
`define GCOP_CDR 4'd1
`define GCOP_RDQA 4'd14
`define GCOP_RDQCDRRX 4'd15
-`define STATE_READ 3'b100
-`define STATE_RUN 3'b010
-`define STATE_WRITE 3'b001
-
-`ifdef SIM
- `define START_STATE `STATE_RUN
-`else
- `define START_STATE `STATE_READ
-`endif
-
`ifdef SIM
`define UART_DIVIDE 1
`else
- `define UART_DIVIDE 625
+ `define UART_DIVIDE 3
`endif
-module cpu (input clk, output [4:0] led, output uart_tx, input uart_rx);
- reg [3:0] state = `START_STATE;
-
- wire is_reading = state == `STATE_READ;
- wire is_running = state == `STATE_RUN;
- wire is_writing = state == `STATE_WRITE;
-
- wire reset = !is_running;
- reg counter = 0;
+module cpu (input CLKin, output [4:0] led, output uart_tx, input uart_rx);
+ wire clk;
- wire gc_clock_enable = is_running;
- wire eval_clock_enable = step_eval & is_running;
- wire reader_clock_enable = is_reading;
- wire writer_clock_enable = is_writing;
+ pll pll (.clock_in(CLKin), .clock_out(clk));
- always @ (posedge clk)
- counter <= counter + 1;
-
- wire [12:0] P;
+ wire [12:0] freeptr;
wire [15:0] E1;
wire [15:0] E2;
wire [3:0] gcop;
wire [12:0] writer_ram_addr;
- wire ram_we = reader_clock_enable ? reader_ram_we : gc_ram_we;
- wire [12:0] ram_addr = reader_clock_enable ? reader_ram_addr : writer_clock_enable ? writer_ram_addr : gc_ram_addr;
- wire [15:0] ram_di = reader_clock_enable ? reader_ram_di : gc_ram_di;
+ wire ram_we;
+ wire [12:0] ram_addr;
+ wire [15:0] ram_di;
wire [15:0] ram_do;
+ wire eval_finished;
wire reader_finished;
wire writer_finished;
+ wire gc_clock_enable;
+ wire eval_clock_enable;
+ wire reader_clock_enable;
+ wire writer_clock_enable;
+ wire reset;
+
+ CTRL ctrl (.clk(clk), .step_eval(step_eval), .reader_finished(reader_finished), .eval_finished(eval_finished), .writer_finished(writer_finished), .gc_clock_enable(gc_clock_enable), .eval_clock_enable(eval_clock_enable), .reader_clock_enable(reader_clock_enable), .writer_clock_enable(writer_clock_enable), .reset(reset), .gc_ram_we(gc_ram_we), .reader_ram_we(reader_ram_we), .gc_ram_addr(gc_ram_addr), .reader_ram_addr(reader_ram_addr), .writer_ram_addr(writer_ram_addr), .gc_ram_di(gc_ram_di), .reader_ram_di(reader_ram_di), .ram_we(ram_we), .ram_addr(ram_addr), .ram_di(ram_di), .uart_is_receiving(uart_is_receiving), .uart_is_transmitting(uart_is_transmitting), .led(led));
+
GCRAM gcram (.clk(clk), .we(ram_we), .addr(ram_addr), .di(ram_di), .do(ram_do));
- GC gc (.clk(clk), .rst(reset), .clk_enable(gc_clock_enable), .Ein(E1), .Eout(E2), .gcop(gcop), .ostate(gostate), .step_eval(step_eval), .conn_ea(conn_ea), .conn_et(conn_et), .ram_we(gc_ram_we), .ram_addr(gc_ram_addr), .ram_di(gc_ram_di), .ram_do(ram_do), .Pout(P));
+ GC gc (.clk(clk), .clk_enable(gc_clock_enable), .Ein(E1), .Eout(E2), .gcop(gcop), .ostate(gostate), .step_eval(step_eval), .conn_ea(conn_ea), .conn_et(conn_et), .ram_we(gc_ram_we), .ram_addr(gc_ram_addr), .ram_di(gc_ram_di), .ram_do(ram_do), .freeptr(freeptr));
- EVAL eval (.clk(clk), .rst(reset), .clk_enable(eval_clock_enable), .Ein(E2), .Eout(E1), .gcop(gcop), .ostate(eostate), .conn_ea(conn_ea), .conn_et(conn_et));
+ EVAL eval (.clk(clk), .rst(reset), .clk_enable(eval_clock_enable), .Ein(E2), .Eout(E1), .gcop(gcop), .ostate(eostate), .conn_ea(conn_ea), .conn_et(conn_et), .eval_finished(eval_finished));
READER reader (.clk(clk), .clk_enable(reader_clock_enable), .rx_byte(uart_rx_byte), .rx_signal(uart_rx_signal), .finished(reader_finished), .ram_we(reader_ram_we), .ram_addr(reader_ram_addr), .ram_di(reader_ram_di));
- WRITER writer (.clk(clk), .clk_enable(writer_clock_enable), .tx_byte(uart_tx_byte), .tx_signal(uart_tx_signal), .tx_busy(uart_is_transmitting), .finished(writer_finished), .ram_addr(writer_ram_addr), .ram_do(ram_do), .P(P));
+ WRITER writer (.clk(clk), .clk_enable(writer_clock_enable), .tx_byte(uart_tx_byte), .tx_signal(uart_tx_signal), .tx_busy(uart_is_transmitting), .finished(writer_finished), .ram_addr(writer_ram_addr), .ram_do(ram_do), .freeptr(freeptr));
// UART outputs
wire uart_rx_signal;
wire uart_tx_signal;
wire [7:0] uart_tx_byte;
- always @ (posedge clk) begin
- if(is_writing & writer_finished)
- state <= `STATE_READ;
-
- if(is_reading & reader_finished)
- state <= `STATE_RUN;
-
- if(is_running & eostate == 5'd7)
- state <= `STATE_WRITE;
- end
-
- // 4800 baud uart
+ // 19200 baud uart
uart #(.CLOCK_DIVIDE(`UART_DIVIDE)) uart (.clk(clk), .rx(uart_rx), .tx(uart_tx), .transmit(uart_tx_signal), .tx_byte(uart_tx_byte), .received(uart_rx_signal), .rx_byte(uart_rx_byte), .is_receiving(uart_is_receiving), .is_transmitting(uart_is_transmitting), .recv_error (uart_rx_error));
-
- // Assign the outputs
- assign led[0] = is_reading;
- assign led[1] = uart_is_receiving;
- assign led[2] = is_writing;
- assign led[3] = uart_is_transmitting;
- assign led[4] = is_running;
endmodule
projects / clump.git / blobdiff