/*!
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/*!
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UCEcho -- C host software for ucecho examples
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UCEcho -- C host software for ucecho examples
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Copyright (C) 2009-2011 ZTEX GmbH.
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Copyright (C) 2009-2014 ZTEX GmbH.
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http://www.ztex.de
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http://www.ztex.de
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This program is free software; you can redistribute it and/or modify
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 3 as
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it under the terms of the GNU General Public License version 3 as
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published by the Free Software Foundation.
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published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful, but
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with this program; if not, see http://www.gnu.org/licenses/.
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along with this program; if not, see http://www.gnu.org/licenses/.
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!*/
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!*/
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#include <stdio.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdlib.h>
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#include <string.h>
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#include <string.h>
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#include <usb.h>
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#include <usb.h>
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#define BUFSIZE 256
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#define BUFSIZE 256
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struct usb_device *device;
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struct usb_device *device;
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usb_dev_handle *handle;
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usb_dev_handle *handle;
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char buf[BUFSIZE];
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char buf[BUFSIZE];
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// find the first ucecho device
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// find the first ucecho device
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struct usb_device *find_device ()
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struct usb_device *find_device ()
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{
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{
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struct usb_bus *bus_search;
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struct usb_bus *bus_search;
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struct usb_device *device_search;
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struct usb_device *device_search;
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bus_search = usb_busses;
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bus_search = usb_busses;
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while (bus_search != NULL)
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while (bus_search != NULL)
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{
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{
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device_search = bus_search->devices;
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device_search = bus_search->devices;
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while (device_search != NULL)
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while (device_search != NULL)
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{
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{
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if ( (device_search->descriptor.idVendor == 0x221a) && (device_search->descriptor.idProduct == 0x100) )
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if ( (device_search->descriptor.idVendor == 0x221a) && (device_search->descriptor.idProduct == 0x100) )
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{
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{
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handle = usb_open(device_search);
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handle = usb_open(device_search);
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usb_get_string_simple(handle, device_search->descriptor.iProduct, buf, BUFSIZE);
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usb_get_string_simple(handle, device_search->descriptor.iProduct, buf, BUFSIZE);
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if ( ! strncmp("ucecho", buf , 6 ) )
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if ( ! strncmp("ucecho", buf , 6 ) )
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return device_search;
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return device_search;
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usb_close(handle);
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usb_close(handle);
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}
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}
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device_search = device_search->next;
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device_search = device_search->next;
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}
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}
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bus_search = bus_search->next;
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bus_search = bus_search->next;
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}
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}
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return NULL;
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return NULL;
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}
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}
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// main
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// main
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int main(int argc, char *argv[])
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int main(int argc, char *argv[])
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{
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{
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usb_init(); // initializing libusb
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usb_init(); // initializing libusb
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usb_find_busses(); // ... finding busses
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usb_find_busses(); // ... finding busses
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usb_find_devices(); // ... and devices
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usb_find_devices(); // ... and devices
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device = find_device(); // find the device (hopefully the correct one)
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device = find_device(); // find the device (hopefully the correct one)
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if ( device == NULL ) { // nothing found
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if ( device == NULL ) { // nothing found
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fprintf(stderr, "Cannot find ucecho device\n");
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fprintf(stderr, "Cannot find ucecho device\n");
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return 1;
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return 1;
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}
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}
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if (usb_claim_interface(handle, 0) < 0) {
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if (usb_claim_interface(handle, 0) < 0) {
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fprintf(stderr, "Error claiming interface 0: %s\n", usb_strerror());
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fprintf(stderr, "Error claiming interface 0: %s\n", usb_strerror());
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return 1;
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return 1;
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}
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}
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while ( strcmp("QUIT", buf) ) {
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while ( strcmp("QUIT", buf) ) {
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// read string from stdin
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// read string from stdin
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printf("Enter a string or `quit' to exit the program: ");
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printf("Enter a string or `quit' to exit the program: ");
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scanf("%s", buf);
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scanf("%s", buf);
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// write string to ucecho device
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// write string to ucecho device
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int i = usb_bulk_write(handle, 0x04, buf, strlen(buf)+1, 1000);
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int i = usb_bulk_write(handle, 0x04, buf, strlen(buf)+1, 1000);
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if ( i < 0 ) {
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if ( i < 0 ) {
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fprintf(stderr, "Error sending data: %s\n", usb_strerror());
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fprintf(stderr, "Error sending data: %s\n", usb_strerror());
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return 1;
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return 1;
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}
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}
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printf("Send %d bytes: `%s'\n", i , buf);
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printf("Send %d bytes: `%s'\n", i , buf);
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// read string back from ucecho device
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// read string back from ucecho device
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i = usb_bulk_read(handle, 0x82, buf, BUFSIZE, 1000);
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i = usb_bulk_read(handle, 0x82, buf, BUFSIZE, 1000);
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if ( i < 0 ) {
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if ( i < 0 ) {
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fprintf(stderr, "Error readin data: %s\n", usb_strerror());
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fprintf(stderr, "Error readin data: %s\n", usb_strerror());
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return 1;
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return 1;
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}
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}
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printf("Read %d bytes: `%s'\n", i , buf);
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printf("Read %d bytes: `%s'\n", i , buf);
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}
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}
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usb_release_interface(handle, 0);
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usb_release_interface(handle, 0);
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usb_close(handle);
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usb_close(handle);
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return 0;
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return 0;
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}
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}
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