最近想通过超级终端（通过串口0）去控制Mini2440，想把串口1的波特率由原来的115200改为9600，让串口1去和单片机通信。用到armcomtest。请问这个怎么改啊？
这是它的提示
Usage: comtest [-d device] [-t tty] [-s speed] [-7] [-c] [-x] [-o] [-h]
         -7 7 bit
         -x hex mode
         -o output to stdout too
         -c stdout output use color
         -h print this help


可是我输入[root@FriendlyARM /]# armcomtest -s 9600B
提示是：Unable to open device
strerror() is No such file or directory


第二次root@FriendlyARM /]# armcomtest -s /dev/ttySAC1 9600B
Bad speed
strerror() is Success


谁可以帮我一下啊？很着急。。。

试试armcomtest -s /dev/ttySAC1 9600

这个还是不行
[root@FriendlyARM /]# armcomtest -s /dev/ttySAC1 9600
Bad speed
strerror() is Success

我找到应用程序，程序如下：
for (;;) {
        int c = getopt(argc, argv, "d:s:t:7xoch");
        if (c == -1)
            break;
        switch(c) {
        case 'd':
            DeviceName = optarg;
            break;
        case 't':
            TtyName = optarg;
            break;
        case 's':
        if (optarg[0] == 'd')
         {
        DeviceSpeed = SerialSpeed(optarg + 1);
        }
        else if (optarg[0] == 't')
         {
        TtySpeed = SerialSpeed(optarg + 1);
        }
        else
                TtySpeed = DeviceSpeed = SerialSpeed(optarg);
            break;
    case 'o':
        OutputToStdout = 1;
        break;
    case '7':
        ByteBits = CS7;
        break;
        case 'x':
            OutputHex = 1;
            break;
    case 'c':
        UseColor = 1;
        break;
        case '?':
        case 'h':
        default:
        PrintUsage();
        }
    }


而有关SerialSpeed的函数如下：
static int SerialSpeed(const char *SpeedString)
{
    int SpeedNumber = atoi(SpeedString);
#   define TestSpeed(Speed) if (SpeedNumber == Speed) return B##Speed
    TestSpeed(1200);
    TestSpeed(2400);
    TestSpeed(4800);
    TestSpeed(9600);
    TestSpeed(19200);
    TestSpeed(38400);
    TestSpeed(57600);
    TestSpeed(115200);
    TestSpeed(230400);
    Error("Bad speed");
    return -1;
}

请问如何写这几个参数呢？