MenuBar
miniCPUの出力をI2C操作のための信号線に接続。 †
module top(sSegAnode, sSegCathode, sw, ledOut, colorLed_1, colorLed_2,
bu, bd, bl, br, bc, scl, sda,
bclck
);
output [7:0] sSegAnode;
output [7:0] sSegCathode;
output [15:0] ledOut; // led[8] ... if sda is sending, corresponding to the last sended sda,
//else corresponding to the last received sda
// it is shifted to left when a positive edge of scl is detected.
// led[0] corresponding to sw[0]
// led[1] corresponding to sw[1]
// led[2] corresponsing to center button, bc.
output [2:0] colorLed_1;
output [2:0] colorLed_2; // color LED
input [15:0] sw; // sw[15:8] ... for setting sda send data, sw[7:0] ... for controlling
// sw[0] ... if 1 scl is not ready, else scl is ready;
// sw[1] ... if 1 sda is receiving(1), else sda is sending(0).
// sw[2] ... sending sda.
input bu, bd, bl, br, bc, bclck; // bd corresponding to !reset.
// bc corresponding to scl. scl=sw[0]|bc
// if posedge bl is detected, sw is shown in hex in the 7seg led array.
inout scl, sda;
reg sclx, sdax;
assign scl=(~sclx)?1'b0:1'bz;
assign sda=(~sdax)?1'b0:1'bz;
wire BNx, BWx, BEx, BCx;
// reset: BSx
// BWx, BEx ... change operationMode
//
wire [15:0] swx;
wire reset;
// reg sclRw, sdaRw; // write=1, read=0;
reg cpuClk,cpuRun;
reg [7:0] data;
reg [1:0] operationMode;
// operationMode: 0 ... manual operation of peripherals
// 1 ... CPU independent
// 2 ... CPU, I2C connected
reg [15:0] ledWire,cpuIn;
wire [2:0] cpuCs;
wire [11:0] pcout,abus;
wire [15:0] irout,qtop,dbus,out;
reg [31:0] sSegArray;
reg [15:0] led;
assign ledOut=led;
reg [2:0] colorLed_1x, colorLed_2x;
//
assign colorLed_1=colorLed_1x;
assign colorLed_2=colorLed_2x;
assign reset=~bd;
// always @(sclx or sdax ) begin
// colorLed_2x[0]<=sclx;
// colorLed_2x[1]<=sdax;
// colorLed_2x[2]<=0;
// end
always @(posedge sclx, negedge reset) begin
if(!reset) begin
data<=0;
end
else
data<={data[6:0],sda};
end
// for operation mode
always @(posedge BEx or posedge BWx or negedge reset) begin
if(!reset) begin
operationMode<=0;
// colorLed_2x[0]<=0;
// colorLed_2x[1]<=0;
// colorLed_2x[2]<=0;
// sclRw<=0;
// sdaRw<=0;
end
else
if(BEx) operationMode<=operationMode+1;
else
if(BWx) operationMode<=operationMode-1;
end
// always @(operationMode or swx[0] or BCx or data or BNx or cpuCs or out or sda or scl or out[0] or out[1]) begin
always @(operationMode) begin
case(operationMode)
0: begin
colorLed_1x=3'b000;
cpuClk=0; cpuRun=0; cpuIn=0;
sSegArray={{16{0}},data,swx[7:0]};
led[15:8]=data;
led[7:0]=swx[7:0];
sclx=BCx;
sdax=swx[0];
colorLed_2x={0,sda,scl};
end
1: begin // CPU independent,
colorLed_1x=3'b001;
cpuClk=BCx; cpuRun=BNx; cpuIn=swx;
sSegArray={{0},cpuCs,pcout,irout};
led={{0{16}},out};
sclx=1'b1;
sdax=1'b1;
colorLed_2x={0,sda,scl};
end
2: begin
colorLed_1x=3'b010;
cpuClk=BCx; cpuRun=BNx; cpuIn={{8{0}},data};
sSegArray={{0},cpuCs,abus,dbus};
led[15:8]=data;
led[7:0]=out[7:0];
sclx=out[0];
sdax=out[1];
colorLed_2x={0,sda,scl};
end
default begin
colorLed_1x=3'b011;
cpuClk=BCx; cpuRun=BNx; cpuIn=swx;
sSegArray={{0{16}},data,swx[7:0]};
led[15:8]=data;
led[7:0]=swx[7:0];
sclx=BCx;
sdax=swx[0];
colorLed_2x={0,sda,scl};
end
endcase
end
chattering #(20) chattering0(.clk(bclck), .reset(reset), .in({bu,bl,br,bc,sw}), .out({BNx, BWx, BEx, BCx,swx}));
// assign BNx=bu;
// assign BWx=bl;
// assign BEx=br;
// assign BCx=bc;
// assign swx=sw;
sSegArray sSegArray0(.clk(bclck), .reset(reset), .load(1), .d(sSegArray), .anode(sSegAnode), .cathode(sSegCathode));
minicpu minicpu0(.clk(cpuClk), .reset(reset), .run(cpuRun), .in(cpuIn), .cs(cpuCs), .pcout(pcout), .irout(irout), .qtop(qtop), .abus(abus), .dbus(dbus), .out(out));
endmodule
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