c# - 在 Linux/Mono 上运行的 FTDI D2XX C# .NET Wrapper - SetEventNotification 被触发似乎使程序崩溃-6ren

c# - 在 Linux/Mono 上运行的 FTDI D2XX C# .NET Wrapper - SetEventNotification 被触发似乎使程序崩溃

转载作者：太空狗更新时间：2023-10-29 12:42:34

我正在努力移植现有的功能性 C# 应用程序，该应用程序使用 FTDI D2XX C# .NET wrapper在 Windows 上，转向 Linux 和 Mono。我已按照有关安装 Linux D2XX driver 的说明进行操作.当检测到我们在 Linux 上运行时，我们会在 C# .NET 包装器中查找并加载 Linux 驱动程序，而不是 Windows 驱动程序。

完成这项工作后，我们的大部分应用程序代码仍然没有问题，但是当使用 SetEventNotification 函数设置的事件在 FT_EVENT_RXCHAR 事件上触发时，应用程序似乎崩溃了。

C# 应用程序的流程是:

与 FTDI 设备建立通信
SetEventNotification 以在 FTDI 设备有新数据可用时收到通知
Ping FTDI 设备，让它知道我们已准备就绪，我们需要一些数据
当收到新数据通知时(通过使用 SetEventNotification)，用它做一些事情

更多细节:

使用 C# 包装器进行读写似乎在 Linux/Mono 上运行良好
- 首先使用 Write ping 设备，然后以下 Reads 成功
使用 D2XX 程序员指南中提供的示例代码，在 Linux 上编写的 C 代码在使用 SetEventNotification 时不会崩溃
(明显的)替代方案，使用 C# 包装器读取所需的字节数似乎在 Linux/Mono 上正常工作

几个问题:

有没有人在 Linux/Mono 上使用 D2XX 驱动程序的 C# .NET Wrapper 时遇到过这个问题？
C# Wrapper 的 SetEventNotification 需要一个 EventWaitHandle，然后使用 SafeWaitHandle 检索 native 操作系统句柄。有没有可能是这里的问题？

非常感谢您提供的任何见解。

编辑:

堆栈跟踪现在附在下面。

我尝试转向轮询方法，但似乎在我们执行 FTDI 读取时可能会有一个“帧”数据未完全写入，并且我们将在数据中出现间隙。

我已联系 FTDI 寻求有关此问题的一些指导。如果我收到可行的回复，将会更新。

# mono --debug ./CT4USB.exe

Native stacktrace:

    mono() [0x49d5fc]
    mono() [0x424a0e]
    /lib/x86_64-linux-gnu/libpthread.so.0(+0x10330) [0x7f3253539330]
    /lib/x86_64-linux-gnu/libpthread.so.0(pthread_mutex_lock+0x4) [0x7f3253533404]
    /usr/local/lib/libftd2xx.so(+0x12f52) [0x7f324b9d1f52]
    /usr/local/lib/libftd2xx.so(+0x134f1) [0x7f324b9d24f1]
    /usr/local/lib/libftd2xx.so(processor_thread+0x21b) [0x7f324b9d29bd]
    /lib/x86_64-linux-gnu/libpthread.so.0(+0x8184) [0x7f3253531184]
    /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d) [0x7f325325e37d]

Debug info from gdb:

[New LWP 5654]
[New LWP 5653]
[New LWP 5652]
[New LWP 5645]
[New LWP 5644]
[New LWP 5643]
[New LWP 5642]
[New LWP 5641]
[New LWP 5640]
[New LWP 5639]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007f3253538b9d in nanosleep () at ../sysdeps/unix/syscall-template.S:81
81  ../sysdeps/unix/syscall-template.S: No such file or directory.
  Id   Target Id         Frame 
  11   Thread 0x7f32523ff700 (LWP 5639) "mono" pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
  10   Thread 0x7f3252a81700 (LWP 5640) "Finalizer" sem_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S:85
  9    Thread 0x7f3253efa700 (LWP 5641) "mono" __clock_nanosleep (clock_id=1, flags=1, req=0x7f3253ef9d80, rem=0x7f325326c974 <__clock_nanosleep+132>) at ../sysdeps/unix/sysv/linux/clock_nanosleep.c:49
  8    Thread 0x7f324bfff700 (LWP 5642) "Threadpool work" pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  7    Thread 0x7f324bdfe700 (LWP 5643) "Threadpool work" pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  6    Thread 0x7f324b9be700 (LWP 5644) "Threadpool work" 0x00007f3253250fdd in poll () at ../sysdeps/unix/syscall-template.S:81
  5    Thread 0x7f324b1bd700 (LWP 5645) "Threadpool work" 0x00007f3253250fdd in poll () at ../sysdeps/unix/syscall-template.S:81
  4    Thread 0x7f324a7ff700 (LWP 5652) "Threadpool work" pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  3    Thread 0x7f3249ffe700 (LWP 5653) "Threadpool work" 0x00007f3253538ed9 in __libc_waitpid (pid=5655, stat_loc=0x7f3249ffce4c, options=0) at ../sysdeps/unix/sysv/linux/waitpid.c:40
  2    Thread 0x7f32497fd700 (LWP 5654) "Threadpool work" pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
* 1    Thread 0x7f325405d7c0 (LWP 5638) "mono" 0x00007f3253538b9d in nanosleep () at ../sysdeps/unix/syscall-template.S:81

Thread 11 (Thread 0x7f32523ff700 (LWP 5639)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00000000005f9aec in ?? ()
#2  0x00007f3253531184 in start_thread (arg=0x7f32523ff700) at pthread_create.c:312
#3  0x00007f325325e37d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 10 (Thread 0x7f3252a81700 (LWP 5640)):
#0  sem_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S:85
#1  0x000000000061de28 in mono_sem_wait ()
#2  0x00000000005a2076 in ?? ()
#3  0x00000000005843d3 in ?? ()
#4  0x0000000000624666 in ?? ()
#5  0x00007f3253531184 in start_thread (arg=0x7f3252a81700) at pthread_create.c:312
#6  0x00007f325325e37d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 9 (Thread 0x7f3253efa700 (LWP 5641)):
#0  __clock_nanosleep (clock_id=1, flags=1, req=0x7f3253ef9d80, rem=0x7f325326c974 <__clock_nanosleep+132>) at ../sysdeps/unix/sysv/linux/clock_nanosleep.c:49
#1  0x00000000006122c8 in ?? ()
#2  0x0000000000588244 in ?? ()
#3  0x00000000005843d3 in ?? ()
#4  0x0000000000624666 in ?? ()
#5  0x00007f3253531184 in start_thread (arg=0x7f3253efa700) at pthread_create.c:312
#6  0x00007f325325e37d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 8 (Thread 0x7f324bfff700 (LWP 5642)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1  0x00000000005fef90 in ?? ()
#2  0x00000000006117a2 in ?? ()
#3  0x00000000005840fd in ?? ()
#4  0x00000000005853e6 in ?? ()
#5  0x00000000418b9b0e in ?? ()
#6  0x0000000000000000 in ?? ()

Thread 7 (Thread 0x7f324bdfe700 (LWP 5643)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1  0x000000000061b982 in ?? ()
#2  0x0000000000586b58 in ?? ()
#3  0x00000000005843d3 in ?? ()
#4  0x0000000000624666 in ?? ()
#5  0x00007f3253531184 in start_thread (arg=0x7f324bdfe700) at pthread_create.c:312
#6  0x00007f325325e37d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 6 (Thread 0x7f324b9be700 (LWP 5644)):
#0  0x00007f3253250fdd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f324b9f2a52 in linux_netlink_event_thread_main () from /usr/local/lib/libftd2xx.so
#2  0x00007f3253531184 in start_thread (arg=0x7f324b9be700) at pthread_create.c:312
#3  0x00007f325325e37d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7f324b1bd700 (LWP 5645)):
#0  0x00007f3253250fdd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f324b9eb14e in handle_events () from /usr/local/lib/libftd2xx.so
#2  0x00007f324b9eb569 in libusb_handle_events_timeout_completed () from /usr/local/lib/libftd2xx.so
#3  0x00007f324b9eb674 in libusb_handle_events_timeout () from /usr/local/lib/libftd2xx.so
#4  0x00007f324b9c924f in poll_async_libusb () from /usr/local/lib/libftd2xx.so
#5  0x00007f3253531184 in start_thread (arg=0x7f324b1bd700) at pthread_create.c:312
#6  0x00007f325325e37d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7f324a7ff700 (LWP 5652)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1  0x00007f324b9cf9fe in EventWait () from /usr/local/lib/libftd2xx.so
#2  0x00007f324b9d2651 in reader_thread () from /usr/local/lib/libftd2xx.so
#3  0x00007f3253531184 in start_thread (arg=0x7f324a7ff700) at pthread_create.c:312
#4  0x00007f325325e37d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f3249ffe700 (LWP 5653)):
#0  0x00007f3253538ed9 in __libc_waitpid (pid=5655, stat_loc=0x7f3249ffce4c, options=0) at ../sysdeps/unix/sysv/linux/waitpid.c:40
#1  0x000000000049d689 in ?? ()
#2  0x0000000000424a0e in ?? ()
#3  <signal handler called>
#4  __GI___pthread_mutex_lock (mutex=0x0) at ../nptl/pthread_mutex_lock.c:66
#5  0x00007f324b9d1f52 in signalSomeEvents () from /usr/local/lib/libftd2xx.so
#6  0x00007f324b9d24f1 in ProcessBulkInData () from /usr/local/lib/libftd2xx.so
#7  0x00007f324b9d29bd in processor_thread () from /usr/local/lib/libftd2xx.so
#8  0x00007f3253531184 in start_thread (arg=0x7f3249ffe700) at pthread_create.c:312
#9  0x00007f325325e37d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f32497fd700 (LWP 5654)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f324b9cf904 in EventWait () from /usr/local/lib/libftd2xx.so
#2  0x00007f324b9cbfd1 in write_thread () from /usr/local/lib/libftd2xx.so
#3  0x00007f3253531184 in start_thread (arg=0x7f32497fd700) at pthread_create.c:312
#4  0x00007f325325e37d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f325405d7c0 (LWP 5638)):
#0  0x00007f3253538b9d in nanosleep () at ../sysdeps/unix/syscall-template.S:81
#1  0x00000000005fedfa in ?? ()
#2  0x000000000061101b in ?? ()
#3  0x000000000058415e in ?? ()
#4  0x0000000000585309 in ?? ()
#5  0x00000000418b3e8d in ?? ()
#6  0x00000000015de450 in ?? ()
#7  0x00007ffc9ba9b960 in ?? ()
#8  0x00007f3253fb8130 in ?? ()
#9  0x00007f3252400578 in ?? ()
#10 0x00007f3252400528 in ?? ()
#11 0x00000000015a41e0 in ?? ()
#12 0x00000000418b3e07 in ?? ()
#13 0x00007ffc9ba9b4d0 in ?? ()
#14 0x00007ffc9ba9b450 in ?? ()
/build/buildd/gdb-7.7.1/gdb/dwarf2-frame.c:692: internal-error: Unknown CFI encountered.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) [answered Y; input not from terminal]
/build/buildd/gdb-7.7.1/gdb/dwarf2-frame.c:692: internal-error: Unknown CFI encountered.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Create a core file of GDB? (y or n) [answered Y; input not from terminal]

=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries 
used by your application.
=================================================================

Aborted (core dumped)

编辑第二个:

Mono 的 SafeWaitHandle 和 SetEventNotification 的预期参数的表示完全不同。因为 FTDI D2XX 库试图将 SafeWaitHandle 视为 EVENT_HANDLE(在 ftd2xx.h header 中定义；基本上是 pthread_cond_t 和 pthread_mutex_t)，我认为这就是我们发生崩溃的原因。

我想我可以通过在 FTDI D2XX C# .NET 包装器中使用 P/Invoke 和 libpthread 来继续执行 pthread 条件和互斥锁以及 Mono SafeWaitHandle 之间的必要转换。此时，我需要工作的 C 代码，它将在 FTDI D2XX 的 pthread_cond_wait 上循环和阻塞。我还没有得到该代码的工作。如果有人有建议，请在下面列出:

/*/*

gcc -o SetEventNotification_separate_thread SetEventNotification_separate_thread.c -lpthread -lftd2xx -Wl,-rpath /usr/local/lib

*/

#include <stdlib.h>
#include <pthread.h>
#include <stdio.h>
#include <stdint.h>
#include "../ftd2xx.h"

static FT_HANDLE ft_handle;


// Seems like this sort of stuff should have been provided by FTDI
static const char *ft_errors[] =
{
    [FT_OK] = "Success",
    [FT_INVALID_HANDLE] = "Invalid device handle",
    [FT_DEVICE_NOT_FOUND] = "Device not found",
    [FT_DEVICE_NOT_OPENED] = "Device not opened",
    [FT_IO_ERROR] = "Input/output error",
    [FT_INSUFFICIENT_RESOURCES] = "Insufficient resources",
    [FT_INVALID_PARAMETER] = "Invalid parameter",
    [FT_INVALID_BAUD_RATE] = "Invalid baud rate",
    [FT_DEVICE_NOT_OPENED_FOR_ERASE] = "Device not opened for erase",
    [FT_DEVICE_NOT_OPENED_FOR_WRITE] = "Device not opened for write",
    [FT_FAILED_TO_WRITE_DEVICE] = "Failed to write device",
    [FT_EEPROM_READ_FAILED] = "EEPROM read failed",
    [FT_EEPROM_WRITE_FAILED] = "EEPROM write failed",
    [FT_EEPROM_ERASE_FAILED] = "EEPROM erase failed",
    [FT_EEPROM_NOT_PRESENT] = "EEPROM not present",
    [FT_EEPROM_NOT_PROGRAMMED] = "EEPROM not programmed",
    [FT_INVALID_ARGS] = "Invalid argument",
    [FT_NOT_SUPPORTED] = "Not supported",
    [FT_OTHER_ERROR] = "Other error"
};

static const int num_ft_errors = sizeof(ft_errors) / sizeof(ft_errors[FT_OK]);
static const char *ft_strerror(FT_STATUS ft_status)
{
    if (ft_status < 0        // Should be impossible because it is unsigned
    || ft_status >= num_ft_errors
    || !ft_errors[ft_status])
    {
    return "Unknown error";
    }
    return ft_errors[ft_status];
}

static void ft_error_exit(const char *str, FT_STATUS ft_status)
{
    if (str && *str)
    fprintf(stderr, "%s: %sn", str, ft_strerror(ft_status));
    else
    fprintf(stderr, "%sn", ft_strerror(ft_status));
    exit(1);
}

static void pthread_error_exit(const char *str, int err)
{
    if (str && *str)
    fprintf(stderr, "%s: %sn", str, strerror(err));
    else
    fprintf(stderr, "%sn", strerror(err));
    exit(1);
}

static void std_error_exit(const char *str)
{
    perror(str);
    exit(1);
}

// Reader thread function
static void *reader_func(void *arg)
{
  FT_STATUS ft_status;
  EVENT_HANDLE eh;
  DWORD chars_in_q;
  char buf[8192];
  int pterr;



  if ((pterr = pthread_mutex_init(&eh.eMutex, NULL)))
    pthread_error_exit("pthread_mutex_init", pterr);
  if ((pterr = pthread_cond_init(&eh.eCondVar, NULL)))
    pthread_error_exit("pthread_cond_init", pterr);

  if ((ft_status = FT_SetEventNotification(ft_handle, FT_EVENT_RXCHAR,
                       (PVOID)&eh)) != FT_OK)
  ft_error_exit("FT_SetEventNotification", ft_status);

  for (;;)
  {
    printf("at for: chars_in_q: %d\n", chars_in_q);

    if ((pterr = pthread_mutex_lock(&eh.eMutex))){
      pthread_error_exit("pthread_mutex_lock", pterr);
      printf("pthread_mutex_lock failed...\n");
    }
    printf("pthread_mutex_lock\n");
    if ((ft_status = FT_GetQueueStatus(ft_handle, &chars_in_q)) != FT_OK)
      ft_error_exit("FT_GetQueueStatus", ft_status);
    printf("before if (chars_in_q == 0): chars_in_q: %d\n", chars_in_q);
//    while (chars_in_q == 0)
//    {
      printf("<<----------- SetEventNotification pthread_cond_wait --------------->>\n");
      if ((pterr = pthread_cond_wait(&eh.eCondVar, &eh.eMutex)))
        pthread_error_exit("pthread_cond_wait", pterr);
      printf("pthread_cond_wait\n");
      if ((ft_status = FT_GetQueueStatus(ft_handle,
                         &chars_in_q)) != FT_OK)
        ft_error_exit("FT_GetQueueStatus", ft_status);
      printf("before if (chars_in_q == 0): chars_in_q: %d\n", chars_in_q);
//    }
    if ((pterr = pthread_mutex_unlock(&eh.eMutex)))
      pthread_error_exit("pthread_mutex_unlock", pterr);

    printf("pthread_mutex_unlock\n");

    while (chars_in_q)
    {
      printf("at while (chars_in_q): chars_in_q: %d\n", chars_in_q);

      DWORD len_to_read, len_read;
      ssize_t len_written;

      len_to_read = (chars_in_q > sizeof(buf)) ? sizeof(buf) : chars_in_q;

      if ((ft_status = FT_Read(ft_handle, (LPVOID)buf,
                   len_to_read, &len_read)) != FT_OK)
        ft_error_exit("FT_Read", ft_status);
      if (!len_read)
      {
        fprintf(stderr, "FT_Read returned no data.n");
        exit(1);
      }

      len_written = printf("%s\n", buf);
      printf("len_to_read: %d\n", len_to_read);
      printf("len_read: %d\n", len_read);

      chars_in_q -= len_read;
    }
  }
}

int main(int argc, char *argv[])
{
  FT_STATUS ft_status;
  DWORD devCount;
  DWORD devIndex = 0; // first device
  DWORD numDevices = 1;
  char serialNumber[64]; // more than enough room!

  const unsigned int baudrate = 8000000;

  FT_DEVICE_LIST_INFO_NODE * devInfo;
  devInfo = malloc(sizeof(FT_DEVICE_LIST_INFO_NODE)*numDevices);

  ft_status = FT_CreateDeviceInfoList(&devCount);

  if(  ft_status != FT_OK)
  {
    printf("No devices connected!\n");
    exit(-1);
  }

  printf("Devices found: %d\n", devCount);

  ft_status = FT_ListDevices((PVOID)devIndex, serialNumber, FT_LIST_BY_INDEX|FT_OPEN_BY_SERIAL_NUMBER);
  if (  ft_status == FT_OK)
  {
    // FT_ListDevices OK, serial number is in serialNumber
    printf("Device Serial Number: %s\n", serialNumber);
  }
  else
  {
    // FT_ListDevices failed
  }

  ft_status = FT_OpenEx(serialNumber, FT_OPEN_BY_SERIAL_NUMBER, &ft_handle);

  printf("after calling FT_OpenEx\n");

  if (  ft_status == FT_OK)
  {
    // FT_OpenEx OK, ft_handle not null
    printf("FT_OpenEx succeeded\n");
  }
  else
  {
    printf("FT_OpenEx failed\n");
  }

    ft_status = FT_SetBaudRate(ft_handle, baudrate);

  if (  ft_status == FT_OK)
  {
    // FT_SetBaudRate OK
    printf("FT_SetBaudRate succeeded\n");
  }
  else
  {
    printf("FT_SetBaudRate failed\n");
  }

  ft_status = FT_SetFlowControl(ft_handle, FT_FLOW_RTS_CTS, 0, 0);

  if (  ft_status == FT_OK)
  {
    // FT_SetFlowControl OK
    printf("FT_SetFlowControl succeeded\n");
  }
  else
  {
    printf("FT_SetFlowControl failed\n");
  }

  // Flush the FTDI's buffers
  if ((ft_status = FT_Purge(ft_handle, FT_PURGE_RX | FT_PURGE_TX)) != FT_OK)
  ft_error_exit("FT_Purge", ft_status);

  // Create reader and writer threads.
  int pterr;
  sigset_t sig_set;
  (void)sigfillset(&sig_set);
  pthread_attr_t ptattr;
  if ((pterr = pthread_attr_init(&ptattr)))
    pthread_error_exit("pthread_attr_init", pterr);
  if ((pterr = pthread_attr_setdetachstate(&ptattr,
                       PTHREAD_CREATE_DETACHED)))
    pthread_error_exit("pthread_attr_setdetachstate", pterr);
  pthread_t reader_id, writer_id;
  if ((pterr = pthread_create(&reader_id, &ptattr, reader_func, NULL)))
  pthread_error_exit("pthread_create reader", pterr);

  // Now wait for a signal to terminate us
  int caught_sig;
  if (sigwait(&sig_set, &caught_sig))
  std_error_exit("sigwait");

  exit(0);
}

gcc -o SetEventNotification_separate_thread SetEventNotification_separate_thread.c -lpthread -lftd2xx -Wl,-rpath /usr/local/lib

*/

#include <stdlib.h>
#include <pthread.h>
#include <stdio.h>
#include <stdint.h>
#include "../ftd2xx.h"

static FT_HANDLE ft_handle;


// Seems like this sort of stuff should have been provided by FTDI
static const char *ft_errors[] =
{
    [FT_OK] = "Success",
    [FT_INVALID_HANDLE] = "Invalid device handle",
    [FT_DEVICE_NOT_FOUND] = "Device not found",
    [FT_DEVICE_NOT_OPENED] = "Device not opened",
    [FT_IO_ERROR] = "Input/output error",
    [FT_INSUFFICIENT_RESOURCES] = "Insufficient resources",
    [FT_INVALID_PARAMETER] = "Invalid parameter",
    [FT_INVALID_BAUD_RATE] = "Invalid baud rate",
    [FT_DEVICE_NOT_OPENED_FOR_ERASE] = "Device not opened for erase",
    [FT_DEVICE_NOT_OPENED_FOR_WRITE] = "Device not opened for write",
    [FT_FAILED_TO_WRITE_DEVICE] = "Failed to write device",
    [FT_EEPROM_READ_FAILED] = "EEPROM read failed",
    [FT_EEPROM_WRITE_FAILED] = "EEPROM write failed",
    [FT_EEPROM_ERASE_FAILED] = "EEPROM erase failed",
    [FT_EEPROM_NOT_PRESENT] = "EEPROM not present",
    [FT_EEPROM_NOT_PROGRAMMED] = "EEPROM not programmed",
    [FT_INVALID_ARGS] = "Invalid argument",
    [FT_NOT_SUPPORTED] = "Not supported",
    [FT_OTHER_ERROR] = "Other error"
};

static const int num_ft_errors = sizeof(ft_errors) / sizeof(ft_errors[FT_OK]);
static const char *ft_strerror(FT_STATUS ft_status)
{
    if (ft_status < 0        // Should be impossible because it is unsigned
    || ft_status >= num_ft_errors
    || !ft_errors[ft_status])
    {
    return "Unknown error";
    }
    return ft_errors[ft_status];
}

static void ft_error_exit(const char *str, FT_STATUS ft_status)
{
    if (str && *str)
    fprintf(stderr, "%s: %sn", str, ft_strerror(ft_status));
    else
    fprintf(stderr, "%sn", ft_strerror(ft_status));
    exit(1);
}

static void pthread_error_exit(const char *str, int err)
{
    if (str && *str)
    fprintf(stderr, "%s: %sn", str, strerror(err));
    else
    fprintf(stderr, "%sn", strerror(err));
    exit(1);
}

static void std_error_exit(const char *str)
{
    perror(str);
    exit(1);
}

// Reader thread function
static void *reader_func(void *arg)
{
  FT_STATUS ft_status;
  EVENT_HANDLE eh;
  DWORD chars_in_q;
  char buf[8192];
  int pterr;



  if ((pterr = pthread_mutex_init(&eh.eMutex, NULL)))
    pthread_error_exit("pthread_mutex_init", pterr);
  if ((pterr = pthread_cond_init(&eh.eCondVar, NULL)))
    pthread_error_exit("pthread_cond_init", pterr);

  if ((ft_status = FT_SetEventNotification(ft_handle, FT_EVENT_RXCHAR,
                       (PVOID)&eh)) != FT_OK)
  ft_error_exit("FT_SetEventNotification", ft_status);

  for (;;)
  {
    printf("at for: chars_in_q: %d\n", chars_in_q);

    if ((pterr = pthread_mutex_lock(&eh.eMutex))){
      pthread_error_exit("pthread_mutex_lock", pterr);
      printf("pthread_mutex_lock failed...\n");
    }
    printf("pthread_mutex_lock\n");
    if ((ft_status = FT_GetQueueStatus(ft_handle, &chars_in_q)) != FT_OK)
      ft_error_exit("FT_GetQueueStatus", ft_status);
    printf("before if (chars_in_q == 0): chars_in_q: %d\n", chars_in_q);
//    while (chars_in_q == 0)
//    {
      printf("<<----------- SetEventNotification pthread_cond_wait --------------->>\n");
      if ((pterr = pthread_cond_wait(&eh.eCondVar, &eh.eMutex)))
        pthread_error_exit("pthread_cond_wait", pterr);
      printf("pthread_cond_wait\n");
      if ((ft_status = FT_GetQueueStatus(ft_handle,
                         &chars_in_q)) != FT_OK)
        ft_error_exit("FT_GetQueueStatus", ft_status);
      printf("before if (chars_in_q == 0): chars_in_q: %d\n", chars_in_q);
//    }
    if ((pterr = pthread_mutex_unlock(&eh.eMutex)))
      pthread_error_exit("pthread_mutex_unlock", pterr);

    printf("pthread_mutex_unlock\n");

    while (chars_in_q)
    {
      printf("at while (chars_in_q): chars_in_q: %d\n", chars_in_q);

      DWORD len_to_read, len_read;
      ssize_t len_written;

      len_to_read = (chars_in_q > sizeof(buf)) ? sizeof(buf) : chars_in_q;

      if ((ft_status = FT_Read(ft_handle, (LPVOID)buf,
                   len_to_read, &len_read)) != FT_OK)
        ft_error_exit("FT_Read", ft_status);
      if (!len_read)
      {
        fprintf(stderr, "FT_Read returned no data.n");
        exit(1);
      }

      len_written = printf("%s\n", buf);
      printf("len_to_read: %d\n", len_to_read);
      printf("len_read: %d\n", len_read);

      chars_in_q -= len_read;
    }
  }
}

int main(int argc, char *argv[])
{
  FT_STATUS ft_status;
  DWORD devCount;
  DWORD devIndex = 0; // first device
  DWORD numDevices = 1;
  char serialNumber[64]; // more than enough room!

  const unsigned int baudrate = 8000000;

  FT_DEVICE_LIST_INFO_NODE * devInfo;
  devInfo = malloc(sizeof(FT_DEVICE_LIST_INFO_NODE)*numDevices);

  ft_status = FT_CreateDeviceInfoList(&devCount);

  if(  ft_status != FT_OK)
  {
    printf("No devices connected!\n");
    exit(-1);
  }

  printf("Devices found: %d\n", devCount);

  ft_status = FT_ListDevices((PVOID)devIndex, serialNumber, FT_LIST_BY_INDEX|FT_OPEN_BY_SERIAL_NUMBER);
  if (  ft_status == FT_OK)
  {
    // FT_ListDevices OK, serial number is in serialNumber
    printf("Device Serial Number: %s\n", serialNumber);
  }
  else
  {
    // FT_ListDevices failed
  }

  ft_status = FT_OpenEx(serialNumber, FT_OPEN_BY_SERIAL_NUMBER, &ft_handle);

  printf("after calling FT_OpenEx\n");

  if (  ft_status == FT_OK)
  {
    // FT_OpenEx OK, ft_handle not null
    printf("FT_OpenEx succeeded\n");
  }
  else
  {
    printf("FT_OpenEx failed\n");
  }

    ft_status = FT_SetBaudRate(ft_handle, baudrate);

  if (  ft_status == FT_OK)
  {
    // FT_SetBaudRate OK
    printf("FT_SetBaudRate succeeded\n");
  }
  else
  {
    printf("FT_SetBaudRate failed\n");
  }

  ft_status = FT_SetFlowControl(ft_handle, FT_FLOW_RTS_CTS, 0, 0);

  if (  ft_status == FT_OK)
  {
    // FT_SetFlowControl OK
    printf("FT_SetFlowControl succeeded\n");
  }
  else
  {
    printf("FT_SetFlowControl failed\n");
  }

  // Flush the FTDI's buffers
  if ((ft_status = FT_Purge(ft_handle, FT_PURGE_RX | FT_PURGE_TX)) != FT_OK)
  ft_error_exit("FT_Purge", ft_status);

  // Create reader and writer threads.
  int pterr;
  sigset_t sig_set;
  (void)sigfillset(&sig_set);
  pthread_attr_t ptattr;
  if ((pterr = pthread_attr_init(&ptattr)))
    pthread_error_exit("pthread_attr_init", pterr);
  if ((pterr = pthread_attr_setdetachstate(&ptattr,
                       PTHREAD_CREATE_DETACHED)))
    pthread_error_exit("pthread_attr_setdetachstate", pterr);
  pthread_t reader_id, writer_id;
  if ((pterr = pthread_create(&reader_id, &ptattr, reader_func, NULL)))
  pthread_error_exit("pthread_create reader", pterr);

  // Now wait for a signal to terminate us
  int caught_sig;
  if (sigwait(&sig_set, &caught_sig))
  std_error_exit("sigwait");

  exit(0);
}

它总是卡在 pthread_cond_wait 上。如有任何想法，我们将不胜感激。

最佳答案

再次没有答案，但我不知道 Mono 是如何定义的EventWaitHandle.SafeWaitHandle.

在 FTDI for Linux (c) 提供的示例中，这是定义

FT_HANDLE ftHandle;  
 FT_STATUS ftStatus; 
 EVENT_HANDLE eh; 
 DWORD EventMask; 

 ftStatus = FT_Open(0, &ftHandle); 
 if(ftStatus != FT_OK) { 
    // FT_Open failed 
    return; 
 } 

 pthread_mutex_init(&eh.eMutex, NULL); 
 pthread_cond_init(&eh.eCondVar, NULL); 

 EventMask = FT_EVENT_RXCHAR | FT_EVENT_MODEM_STATUS; 
 ftStatus = FT_SetEventNotification(ftHandle, EventMask, (PVOID)&eh);

所以我想知道这是否与SafeWaitHandle的定义有关

关于c# - 在 Linux/Mono 上运行的 FTDI D2XX C# .NET Wrapper - SetEventNotification 被触发似乎使程序崩溃，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37056602/

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c# - 在 Linux/Mono 上运行的 FTDI D2XX C# .NET Wrapper - SetEventNotification 被触发似乎使程序崩溃