always@(posedge spi_clk or negedge rst_n)
if(!rst_n)
data_in<=40'd0;
else if(!spi_cs)
data_in<=40'd0;
else
data_in<={data_in[38:0],spi_mosi_r};//将SPI输入数据存入data_in寄存器
always@(posedge spi_clk or negedge rst_n)
if(!rst_n)
data<=32'd0;
else if(data_in[7:0] == 8'd13)//“回车”键对应的ASCII码的值为8‘d13
data<=data_in>>8;//取回车键之前的值
else
data<=data;
//对比接收数据//
reg [2:0]led;
always@(posedge CLK_25M or negedge rst_n)
if(!rst_n)
led <= 3'b111;
else if (data == ledr)
led <= 3'b011; //红灯亮
else if (data == ledg)
led <= 3'b101; //绿灯亮
else if (data == ledb)
led <= 3'b110; //蓝灯亮