|
st_n <= 0;
#200
rst_n <= 1;
end
reg Send_en;
reg [7:0]Data_send;
wire Read_en;
wire [7:0]Data_recive;
wire Spi_clk;
wire Spi_mosi;
wire Spi_miso;
wire Cs_output;
SPI_Interface
# (
.Value_divide (4))
SPI_inst
(
//-----------------内部接口------------------
.Clk (clk_50m),
.Rst_n (rst_n),
.CPOL (1),
.CPHA (0),
.CS_input (1),
.Send_en (Send_en),
.Data_send (Data_send),
.Read_en (Read_en),
.Data_recive (Data_recive),
//------------------外部接口------------------
.Spi_clk (Spi_clk),
.Spi_mosi (Spi_mosi),
.Spi_miso (Spi_miso),
.Cs_output (Cs_output)
);
assign Spi_miso = Spi_mosi;
initial begin
Send_en <= 0;
Data_send <= 0;
#400;
Send_en <= 1;
Data_send <= 8'haf;
#20
Send_en <= 0;
#800;
Send_en <= 1;
Data_send <= 8'h55;
#20
Send_en <= 0;
end
endmodule
2、仿真结果
两倍分频：
四倍分频：
八倍分频：
CPOL=1、CPHA=1；
CPOL=1、CPHA=0；
CPOL=0、CPHA=0；
CPOL=0、CPHA=1；
结论：仿真实验初步成功，能够满足SPI通信的基本要求。
|