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/*
usbrelay: Control USB HID connected electrical relay modules
Copyright (C) 2014 Darryl Bond
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <wchar.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <unistd.h>
#include <hidapi/hidapi.h>
#include "usbrelay.h"
int main( int argc, char *argv[]) {
struct relay *relays = 0;
unsigned char buf[9];// 1 extra byte for the report ID
char arg_t[20] = {'\0'};
int debug = 0;
int num_relays = 2;
char *token;
const char delimiters[] = "_=";
int i;
struct hid_device_info *devs, *cur_dev;
hid_device *handle;
int size = sizeof(struct relay);
unsigned short vendor_id = 0x16c0;
unsigned short product_id = 0x05df;
char *vendor, *product;
int exit_code = 0;
/* allocate the memory for all the relays */
if (argc > 1) {
relays = malloc(size*(argc+1)); /* Yeah, I know. Not using the first member */
relays[0].this_serial[0] = '\0';
} else debug = 1;
/* loop through the command line and grab the relay details */
for (i = 1 ; i < argc; i++ ) {
/* copy the arg and bounds check */
strncpy(arg_t,argv[i],19);
arg_t[19] = '\0';
token = strtok(arg_t, delimiters);
if (token != NULL) {
strcpy(relays[i].this_serial,token);
}
token = strtok((char *)NULL, delimiters);
if (token != NULL) {
relays[i].relay_num = atoi(token);
}
token = strtok(NULL, delimiters);
if (relays[i].relay_num == 0) { /* command to change the serial - remaining token is the new serial */
if (token != NULL) {
strcpy(relays[i].new_serial,token);
}
} else {
if (token != NULL) {
if (atoi(token)) {
relays[i].state = ON;
} else {
relays[i].state = OFF;
}
}
}
fprintf(stderr,"Orig: %s, Serial: %s, Relay: %d State: %x\n",arg_t,relays[i].this_serial,relays[i].relay_num,relays[i].state);
relays[i].found = 0;
}
product = getenv("USBID");
if (product != NULL) {
vendor = strsep(&product, ":");
if (vendor && *vendor) {
vendor_id = strtol(vendor, NULL, 16);
}
if (product && *product) {
product_id = strtol(product, NULL, 16);
}
}
devs = hid_enumerate(vendor_id, product_id);
cur_dev = devs;
while (cur_dev) {
fprintf(stderr,"Device Found\n type: %04hx %04hx\n path: %s\n serial_number: %ls", cur_dev->vendor_id, cur_dev->product_id, cur_dev->path, cur_dev->serial_number);
fprintf(stderr,"\n");
fprintf(stderr," Manufacturer: %ls\n", cur_dev->manufacturer_string);
fprintf(stderr," Product: %ls\n", cur_dev->product_string);
fprintf(stderr," Release: %hx\n", cur_dev->release_number);
fprintf(stderr," Interface: %d\n", cur_dev->interface_number);
// The product string is USBRelayx where x is number of relays read to the \0 in case there are more than 9
num_relays = atoi((const char *)&cur_dev->product_string[8] );
fprintf(stderr," Number of Relays = %d\n",num_relays);
handle = hid_open_path(cur_dev->path);
if (!handle) {
fprintf(stderr,"unable to open device\n");
return 1;
}
buf[0] = 0x01;
int ret = hid_get_feature_report(handle,buf,sizeof(buf));
if (ret == -1) {
perror("hid_get_feature_report");
exit(1);
}
if (debug) {
for ( i = 0; i < num_relays ; i++ ) {
if (buf[7] & 1 << i) {
printf("%s_%d=1\n",buf,i+1);
} else {
printf("%s_%d=0\n",buf,i+1);
}
}
}
/* loop through the supplied command line and try to match the serial */
for (i=1;i<argc;i++) {
fprintf(stderr,"Serial: %s, Relay: %d State: %x \n",relays[i].this_serial,relays[i].relay_num,relays[i].state);
if (!strcmp(relays[i].this_serial, (const char *) buf)) {
fprintf(stderr,"%d HID Serial: %s ", i, buf);
if (relays[i].relay_num == 0 ) {
set_serial(handle,relays[i].new_serial);
} else {
fprintf(stderr,"Serial: %s, Relay: %d State: %x\n",relays[i].this_serial,relays[i].relay_num,relays[i].state);
if (operate_relay(handle,relays[i].relay_num,relays[i].state) < 0 )
exit_code++;
relays[i].found = 1;
}
}
}
hid_close(handle);
fprintf(stderr,"\n");
cur_dev = cur_dev->next;
}
hid_free_enumeration(devs);
/* Free static HIDAPI objects. */
hid_exit();
for (i=1;i<argc;i++){
fprintf(stderr,"Serial: %s, Relay: %d State: %x ",relays[i].this_serial,relays[i].relay_num,relays[i].state);
if (relays[i].found )
fprintf(stderr,"--- Found\n");
else {
fprintf(stderr,"--- Not Found\n");
exit_code++;
}
}
if (relays)
free(relays);
exit(exit_code);
}
int operate_relay(hid_device *handle,unsigned char relay, unsigned char state){
unsigned char buf[9];// 1 extra byte for the report ID
int res;
buf[0] = 0x0; //report number
buf[1] = state;
buf[2] = relay;
buf[3] = 0x00;
buf[4] = 0x00;
buf[5] = 0x00;
buf[6] = 0x00;
buf[7] = 0x00;
buf[8] = 0x00;
res = hid_write(handle, buf, sizeof(buf));
if (res < 0) {
fprintf(stderr,"Unable to write()\n");
fprintf(stderr,"Error: %ls\n", hid_error(handle));
}
return(res);
}
int set_serial(hid_device *handle,char *newserial){
unsigned char buf[9];// 1 extra byte for the report ID
int res;
buf[0] = 0x0; //report number
buf[1] = CMD_SET_SERIAL;
buf[2] = newserial[0];
buf[3] = newserial[1];
buf[4] = newserial[2];
buf[5] = newserial[3];
buf[6] = newserial[4];
buf[7] = 0x00;
buf[8] = 0x00;
res = hid_write(handle, buf, sizeof(buf));
if (res < 0) {
fprintf(stderr,"Unable to write()\n");
fprintf(stderr,"Error: %ls\n", hid_error(handle));
}
return(res);
}
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