無償ツールで実践する「ハード・ソフト協調検証」(2) ―― テスト・プログラムはC言語で書く

module test;

    import "DPI-C" task c_main();

    initial begin
        c_main();  

        $finish(2);
    end  

//------------------------------------------------
// export 関数の宣言
//------------------------------------------------
 
    export "DPI-C" task read_byte_bus = task read_byte;
    export "DPI-C" task write_byte_bus = task write_byte;  

//------------------------------------------------
// メモリ
//------------------------------------------------

    byte unsigned memory[int];  

//------------------------------------------------
// export 関数の定義
//------------------------------------------------

    task read_byte( input int unsigned addr, inout byte unsigned data );
        data = memory[addr];  

        $display("read_byte : addr = 0x%08h, data = 0x%02h", addr, data );
    endtask : read_byte  

    task write_byte( input int unsigned addr, input byte unsigned data );
        $display("write_word : addr = 0x%08h, data = 0x%02h", addr, data );
        memory[addr] = data;  

    endtask : write_byte

endmodule : test

#include <stdio.h>

void write_byte_bus( unsigned int addr, unsigned char data );

void read_byte_bus( unsigned int addr, unsigned char *data );

int c_main( void )
{
    unsigned int addr;
    unsigned char b_data, b_exp;

    addr = 0x2000;
    b_data = 0xde;

    write_byte_bus( addr, b_data );
    read_byte_bus( addr, &b_exp );
    if( b_data != b_exp )
        printf("compare error, BYTE : addr = 0x%08x, data = 0x%02x/0x%02x\n",
                                               addr, b_data, b_exp );
    return 0;
}