Hi All,
Here are more updated regarding to FTDI2232H test with libftdi on
Windows 7 (32 bits and 64 bits)
Environment setsup:
1. Zadig 2.0.1(Build 160) to install WinUSB(libusbx) driver.
2. The Ftdi2232h controller was shown as two usb interface device
3. Running both stream_test and serial_test as described in my first
email.
4. Running USBTRace 2.8.0.80 from sysnucleus.com to capture the usb
traffic. I can see the data was written from serial_test to usb device, but
there is no data was read from another terminal running serial_test.
I also use visual studio 2012 to compile the serial_test code with slightly
modification, I debugged it step by step and found there is never data
read from usb interface A or B(In my setup, I am using interface A)
Could anybody here ever test the libftdi library on Windows 7 with read or
stream read functions? Any advice will be greatly appreciated.
Regards,
James
Appendix 1:
/* serial_test.c
Read/write data via serial I/O
This program is distributed under the GPL, version 2
*/
#include <stdio.h>
#include <stdlib.h>
//#include <unistd.h>
//#include <getopt.h>
//#include <signal.h>
#include "../libftdi/ftdi.h"
static int exitRequested = 0;
/*
* sigintHandler --
*
* SIGINT handler, so we can gracefully exit when the user hits ctrl-C.
*/
static void
sigintHandler(int signum)
{
exitRequested = 1;
}
int main(int argc, char **argv)
{
struct ftdi_context *ftdi;
unsigned char buf[1024];
int f = 0, i = 0;
int vid = 0x403;
int pid = 0x6010;
int baudrate = 3000000;
int iface = INTERFACE_A;
int do_write = 0;
unsigned int pattern = 0xffff;
int retval = EXIT_FAILURE;
char *p = NULL;
// Init
if ((ftdi = ftdi_new()) == 0)
{
fprintf(stderr, "ftdi_new failed\n");
return EXIT_FAILURE;
}
iface = strtol(argv[1], &p, 10);
do_write = strtol(argv[2], &p, 10);
// Select interface
ftdi_set_interface(ftdi, iface);
// Open device
f = ftdi_usb_open(ftdi, vid, pid);
if (f < 0)
{
fprintf(stderr, "unable to open ftdi device: %d (%s)\n", f,
ftdi_get_error_string(ftdi));
exit(-1);
}
// Set baudrate
f = ftdi_set_baudrate(ftdi, 12000000);
if (f < 0)
{
fprintf(stderr, "unable to set baudrate: %d (%s)\n", f,
ftdi_get_error_string(ftdi));
exit(-1);
}
/* Set line parameters
*
* TODO: Make these parameters settable from the command line
*
* Parameters are choosen that sending a continous stream of 0x55
* should give a square wave
*
*/
f = ftdi_set_line_property(ftdi, 8, STOP_BIT_1, NONE);
if (f < 0)
{
fprintf(stderr, "unable to set line parameters: %d (%s)\n", f,
ftdi_get_error_string(ftdi));
exit(-1);
}
// Set baudrate
/* f = ftdi_set_baudrate(ftdi, baudrate);
if (f < 0)
{
fprintf(stderr, "unable to set baudrate: %d (%s)\n", f,
ftdi_get_error_string(ftdi));
exit(-1);
}
*/
/* A timeout value of 1 results in may skipped blocks */
if(ftdi_set_latency_timer(ftdi, 2))
{
fprintf(stderr,"Can't set latency, Error
%s\n",ftdi_get_error_string(ftdi));
ftdi_usb_close(ftdi);
ftdi_free(ftdi);
return EXIT_FAILURE;
}
if (do_write)
for(i=0; i<1024; i++)
buf[i] = 0x12;
//signal(SIGINT, sigintHandler);
while (1)
{
if (do_write)
{
f = ftdi_write_data(ftdi, buf, sizeof(buf));
}
else
f = ftdi_read_data(ftdi, buf, sizeof(buf));
Sleep(1 * 1000);
if(f> 0 && !do_write)
{
printf("read %d bytes and first byte is %x\n", f, buf[0]);
// fwrite(buf, f, 1, stdout);
// fflush(stderr);
// fflush(stdout);
}
}
retval = EXIT_SUCCESS;
ftdi_usb_close(ftdi);
do_deinit:
ftdi_free(ftdi);
return retval;
}
---------- Forwarded message ----------
From: James Liu <[email protected]>
Date: Wed, Oct 30, 2013 at 12:04 PM
Subject: Fwd: Help: libftdi (serial_test) won't work on my windows 7 64
bits bench
To: [email protected]
Hi All,
We are right now running a project which need high speed usbserial
controller. We are evaluating ft2232H chip with running several programs
from the package libftdi1git_devkit_mingw64 Xiaofeng provided on
Linux(Ubuntu 12.04) and Windows 7(64bits). Linux is totally fine and
running very smoothly. However, We got several problems on Windows 7(64
bits):
1. Loopback tests:
We connect port A to port B of controller to do loopback test.
We ran below program for writing in one terminal
E:\downloads\libftdi1git_devkit_mingw64\bin64>serial_test.exe -v0x403
-p0x6010 -i1 -w12
However, when we ran below program in another terminal for reading , we
always got below error
E:\downloads\libftdi1git_devkit_mingw64\bin64>serial_test.exe -v0x403
-p0x6010 -
i2
unable to open ftdi device: -4 (usb_open() failed)
2. Then we did second test with two ft2232h connect with each other through
port (interface) 2.
We ran below program in one PC(windows 7)
E:\downloads\libftdi1git_devkit_mingw64\bin64>serial_test.exe -v0x403
-p0x6010 -i2 -w12
and ran another program in another PC(windows)
E:\downloads\libftdi1git_devkit_mingw64\bin64>serial_test.exe -v0x403
-p0x6010 -i2
We can tell that data was written into port 2 of one controller through
SysNucleus USBTrace tool.
But we never receive any data from port 2 of controller in another PC.
3. The reason why I know the serial_test works on Linux because I can see
print out from serial_test.Here are command I ran on Linux
1. ./serial_test -v0x403 -p0x6010 -i1 -w12 //write 0x0C into buffer
2. ./serial_test -v0x403 -p0x6010 -i1 //Read
I can keep on reading the data from read side. I tried on Windows 7 32
bits system today and no lucky to get it works. I was wondering have the
code been tested on windows before?
Appreciate for any of your advice in advance.
Regards,
James
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