public const int32  = 0;
driver.baud = ;
public link void OS_init(){} = driver.OS_init;
public link void òΪ_(bit n1){} = driver.set_baud;
public link void ַ_(bit n1){} = driver.print_string;
public link void ַʽ_(bit n1){} = driver.print_number;
public link void ַ_(bit n1){} = driver.print_char;
public link void ȴһ(){} = driver.get_byte;
