/*spi和cpld之間的通信模塊，還要控制da轉換模塊*/module spi_communication(	mosi0,	/*單片機控制spi輸入*/							ssel_w,	/*write module select*/							ssel_c,	/*控制命令輸入*/							ssel_r, /*read module select*/							clk0,	/*單片機時鐘控制*/							clk1,	/*cpld時鐘控制*/							wave_out,	/*da輸入，讀出波形數據*/							am_control,	/*da幅度控制*/							address_control,	/*地址指針控制*/							data,	/*ram的輸入輸出數據端口*/							read,	/*讀控制*/							write	/*寫控制*/							);	output 			write,read;output 	[7:0]   am_control,				wave_out;output 	[31:0]  address_control;				inout 	[7:0] 	data;	wire    [7:0]	  data;reg 			write,read;reg [7:0] 		am_control,							wave_out;	reg [31:0] 		address_control,							frequ_control; /*頻率控制即步進量控制*/reg [7:0]			counter;reg [2:0] 		one_byte;reg [7:0]       data_buf;reg [31:0]      addr_t;wire[31:0]      addr;input   mosi0,		ssel_w,		ssel_c,		ssel_r,		clk0,		clk1;always@(posedge clk0) begin	counter<=0;		/*記數初始化*/	one_byte<=0;			if(ssel_w)		/*選擇寫入*/					begin			read<=1'b0;					data_buf[7:0]<={data_buf[6:0],mosi0};			one_byte<=one_byte+3'b001;						if(one_byte==0)	/*夠一個字節了，寫入ram*/			write<=1'b1;			else 			write<=1'b0;			end									else if(ssel_c)		/*選擇寫入控制命令*/				begin									counter<=counter+1;			if(counter<=7)			am_control[7:0]<={am_control[6:0],mosi0};	/*首先輸入的是幅度控制*/			else if(counter<=39)			addr_t[31:0]<={addr_t[30:0],mosi0};	/*地址指針*/			else if(counter<=71)			frequ_control[31:0]<={frequ_control[30:0],mosi0};	/*頻率控制字*/						end									else if(ssel_r)								begin								read<=1'b1;	/*初始化*/						write<=1'b0;						end																	endassign data= (ssel_w)? data_buf : 8'hzz;assign addr = read? (addr_t+frequ_control) : 0; always@(posedge clk1)begin			if(read==1)	   			begin			wave_out<=data;		/*讀出的波形數據*/	        address_control <= addr;						/*頻率控制*/			endendendmodule