帮忙看看一个小程序...非常感谢
#include <windows.h>
#include <stdio.h>
#include <conio.h>
#include "winio.h "
#define REG_RX 0x3F8
#define REG_TX 0x3F8
#define REG_IER 0x3F9
#define REG_IIR 0x3FA
#define REG_LCR 0x3FB
#define REG_MCR 0x3FC
#define REG_LSR 0x3FD
#define REG_MSR 0x3FE
#define REG_FCR 0x3FF
void f_InitialCom()
{
int inVal,outVal;
_outp(REG_LCR,0x80);
inVal=_inp(REG_LCR);
printf( "LCR:%Xh\n ",inVal);
_outp(REG_TX,0x78);
_outp(REG_IER,0);
_outp(REG_LCR,0x03);
_outp(REG_IER,0);
_outp(REG_FCR,0x80);
}
void main()
{
int inVal,outVal;
bool bResult;
// Call InitializeWinIo to initialize the WinIo library.
bResult = InitializeWinIo();
if (bResult)
{
// Under Windows NT/2000/XP, after calling InitializeWinIo,
// you can call _inp/_outp instead of using GetPortVal/SetPortVal
//f_InitialCom();
_outp(REG_LCR,0x80);
inVal=_inp(REG_LCR);
printf( "LCR:%Xh\n ",inVal);
// When you 're done using WinIo, call ShutdownWinIo
ShutdownWinIo();
}
else
{
printf( "Error during initialization of WinIo.\n ");
exit(1);
}
}
输出总是0xFFh,好象数值都没写进去.
帮忙看看.
[解决办法]
你这种方式不对,winNT,以上,就不让用户直接写PORT
http://vip2.6to23.com/testsys/ VC编程中有
