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fxlink: basic implementation of the bulk transfer mode

This commit is contained in:
Lephenixnoir 2021-04-27 15:42:02 +02:00
parent d09ad9dd17
commit 654ea8fa26
Signed by: Lephenixnoir
GPG Key ID: 1BBA026E13FC0495
1 changed files with 15 additions and 11 deletions
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26
fxlink/main.c
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@ -25,7 +25,7 @@ static const char *help_string =
"fxlink interacts with CASIO calculators of the fx-9860G and fx-CG 50 series\n"
"over the USB port, through mass storage and custom USB protocols. Depending\n"
"on the mode, fxlink uses libusb (for discovery and USB communication)or\n"
"the UDisks2 library (to mount and use Mass Storage devics).\n"
"the UDisks2 library (to mount and use Mass Storage devices).\n"
"\n"
"Operating modes:\n"
" -l, --list List detected calculators on the USB ports (libusb)\n"
@ -252,24 +252,28 @@ int main_test(libusb_device *dev, libusb_context *context)
if((rc = libusb_open(dev, &dh)))
return libusb_err(rc, "cannot open device %s", usb_id(dev));
printf("driver active: %d\n", libusb_kernel_driver_active(dh, 0));
/* When possible detach any existing driver */
libusb_set_auto_detach_kernel_driver(dh, true);
if((rc = libusb_claim_interface(dh, 0))) {
libusb_close(dh);
return libusb_err(rc, "cannot claim interface on %s", usb_id(dev));
}
uint8_t buffer[512];
int transferred;
uint8_t buffer[2048];
int transferred = -1;
rc = libusb_bulk_transfer(dh, 0x81, buffer, 512, &transferred, 2000);
while(1)
{
rc = libusb_bulk_transfer(dh, 0x81, buffer, 2048, &transferred, 500);
if(rc)
rc = libusb_err(rc, "cannot perform bulk transfer on %s", usb_id(dev));
else {
printf("Got some data!\n");
fwrite(buffer, 1, transferred, stdout);
rc = 0;
if((rc == 0 || rc == LIBUSB_ERROR_TIMEOUT) && transferred > 0)
fwrite(buffer, 1, transferred, stdout);
if(rc)
rc=libusb_err(rc,"cannot perform bulk transfer on %s",usb_id(dev));
fprintf(stderr, "Transferred: %d\n", transferred);
if(rc || transferred == 0) break;
}
libusb_release_interface(dh, 0);