128 lines
2.7 KiB
Systemverilog
128 lines
2.7 KiB
Systemverilog
class spi_trans;
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//Properties for Randomizing the MOSI
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rand bit cmd;
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rand bit s;
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rand bit[24:0] addr;
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rand bit[ 4:0] op;
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rand bit[31:0] data[];
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//Properties for Randomizing the pkt_sent process
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rand int interval;
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rand int half_sclk;
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constraint cstr {
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(s==1'b0 && data.size()==1) || (s==1'b1 && data.size()==16);
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interval <= 1000;
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interval >= 0;
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half_sclk <= 32;
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half_sclk >= 4;
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(addr >= 25'h000_0000 &&
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addr <= 25'h000_0033 &&
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s == 1'b0 ) ||
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(addr >= 25'h010_0000 &&
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addr <= 25'h010_001F &&
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s == 1'b0 ) ||
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(addr >= 25'h010_0040 &&
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addr <= 25'h010_00A7 &&
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s == 1'b0 ) ||
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(addr >= 25'h010_0040 &&
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addr <= 25'h010_0067 &&
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s == 1'b1 ) ||
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(addr >= 25'h020_0000 &&
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addr <= 25'h020_001F &&
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s == 1'b0 ) ||
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(addr >= 25'h020_0098 &&
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addr <= 25'h020_00A3 &&
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s == 1'b0 ) ||
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(addr >= 25'h020_0100 &&
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addr <= 25'h020_0123 &&
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s == 1'b0 ) ||
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(addr >= 25'h020_0128 &&
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addr <= 25'h020_014F &&
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s == 1'b1 ) ||
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(addr >= 25'h020_0128 &&
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addr <= 25'h020_018F &&
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s == 1'b0 );
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(addr < 25'h000_0020) ||
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(addr > 25'h000_0023) ||
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(data[0] <= 500);
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}
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function new();
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endfunction
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extern function bit compare(spi_trans rhs_);
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extern function void print();
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extern function void unpack(ref bit stream[$]);
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endclass : spi_trans
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function bit spi_trans::compare(spi_trans rhs_);
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bit result=1'b1;
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int i=0;
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result = ((this.cmd == rhs_.cmd) &&
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(this.s == rhs_.s) &&
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(this.addr == rhs_.addr) &&
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(this.op == rhs_.op));
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if(this.data.size() != rhs_.data.size()) begin
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$display("data_sizes are different");
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result = 1'b0;
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end
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else
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for(i=0;i<this.data.size();i++)begin
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if(this.data[i] != rhs_.data[i])
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result = 1'b0;
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end
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return result;
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endfunction : compare
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function void spi_trans::print();
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int i=0;
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$display("cmd:",this.cmd);
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$display("s:",this.s);
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$display("addr:",this.addr);
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$display("op:",this.op);
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for(i=0;i<this.data.size();i++)begin
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$display("data[%d]='h%h=%d",i,data[i],data[i]);
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end
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endfunction : print
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function void spi_trans::unpack(ref bit stream[$]);
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int i=0,j=0;
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stream[0]=cmd;
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stream[1]=s;
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for(i=0;i<25;i++)
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stream[i+2] = addr[24-i];//Q:If the addr is 1234, is "1" occurs firstly or "4" does?
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for(i=0;i<5;i++)
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stream[i+27]= op[4-i];
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for(i=0;i<this.data.size();i++)begin
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//$display("i=%2d,datai=%b",i,data[i]);
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for(j=0;j<32;j++)begin
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stream[32+i*32+j]=data[i][31-j];
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//$display("i=%2d,j=%2d,streamij=%b",i,j,stream[32+i*32+j]);
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end
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end
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endfunction
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