int
FTDIDevice_Open(FTDIDevice *dev)
{
int err;
memset(dev, 0, sizeof *dev);
if ((err = libusb_init(&dev->libusb))) {
return err;
}
libusb_set_option(dev->libusb, LIBUSB_OPTION_LOG_LEVEL, 2);
dev->handle = libusb_open_device_with_vid_pid(dev->libusb,
OV_VENDOR,
OV_PRODUCT);
if (!dev->handle) {
dev->handle = libusb_open_device_with_vid_pid(dev->libusb,
FTDI_VENDOR,
FTDI_PRODUCT_FT2232H);
}
if (!dev->handle) {
return LIBUSB_ERROR_NO_DEVICE;
}
return DeviceInit(dev);
}
//==============================================================================
void USB_Device::set_debug_mode(DebugLevel level)
{
#if defined(LIBUSB_API_VERSION) && (LIBUSB_API_VERSION >= 0x01000106)
libusb_set_option(context_.get(), LIBUSB_OPTION_LOG_LEVEL, level);
#else
libusb_set_debug(context_.get(), level);
#endif
}
/* Configure CH341A, find the device and set the default interface. */
int32_t ch341Configure(uint16_t vid, uint16_t pid)
{
struct libusb_device *dev;
int32_t ret;
struct sigaction sa;
uint8_t desc[0x12];
if (devHandle != NULL) {
fprintf(stderr, "Call ch341Release before re-configure\n");
return -1;
}
ret = libusb_init(NULL);
if(ret < 0) {
fprintf(stderr, "Couldn't initialise libusb\n");
return -1;
}
libusb_set_option(NULL, LIBUSB_OPTION_LOG_LEVEL, LIBUSB_LOG_LEVEL_INFO);
if(!(devHandle = libusb_open_device_with_vid_pid(NULL, vid, pid))) {
fprintf(stderr, "Couldn't open device [%04x:%04x].\n", vid, pid);
return -1;
}
if(!(dev = libusb_get_device(devHandle))) {
fprintf(stderr, "Couldn't get bus number and address.\n");
goto close_handle;
}
if(libusb_kernel_driver_active(devHandle, 0)) {
ret = libusb_detach_kernel_driver(devHandle, 0);
if(ret) {
fprintf(stderr, "Failed to detach kernel driver: '%s'\n", strerror(-ret));
goto close_handle;
}
}
ret = libusb_claim_interface(devHandle, 0);
if(ret) {
fprintf(stderr, "Failed to claim interface 0: '%s'\n", strerror(-ret));
goto close_handle;
}
ret = libusb_get_descriptor(devHandle, LIBUSB_DT_DEVICE, 0x00, desc, 0x12);
if(ret < 0) {
fprintf(stderr, "Failed to get device descriptor: '%s'\n", strerror(-ret));
goto release_interface;
}
printf("Device reported its revision [%d.%02d]\n", desc[12], desc[13]);
sa.sa_handler = &sig_int;
sa.sa_flags = SA_RESTART;
sigfillset(&sa.sa_mask);
if (sigaction(SIGINT, &sa, &saold) == -1) {
perror("Error: cannot handle SIGINT"); // Should not happen
}
return 0;
release_interface:
libusb_release_interface(devHandle, 0);
close_handle:
libusb_close(devHandle);
devHandle = NULL;
return -1;
}
