altera扩展的专用api的使用实例.c

清华大学Altera FPGA工程师成长手册（光盘视频）

main()
{
alt_u32 checksum_value;
alt_u32 checksum_start_time;
alt_u32 checksum_end_time;
If (alt_timestamp_start()<0)
{
Printf ("No timestamp device available. \n");
}
else
{
//在校验前取出时间戳值
checksum_start_time= alt_timestamp_start();
//执行校验
checksum_value= checksum_test();
//在校验后取出时间戳值
checksum_end_time= alt_timestamp();
//从 checksum_end_time到checksum_start_time的数字的不同测试时间
Printf("timestamp measurement for checksum_test()=%u ticks,\n",(unsigned int)( checksum_end_time- checksum_start_time));
}
}