maybe have offset measurement

cmdline/read-temp.c

@@ -29,7 +29,7 @@ respectively.
 #include "../firmware/masterchip/usbdrv/usbconfig.h"  /* device's VID/PID and names */
 
 void usage() {
-	printf("Usage: read-temp [spi|temp|dbg] [[opcode] [addr] [value]]\n");
+	printf("Usage:\tread-temp [spi|temp|dbg] [[opcode] [addr] [value]]\n\tread-temp [offset] [channel]\n");
 }
 
 int main(int argc, char **argv)
@@ -128,7 +128,6 @@ int                 cnt, vid, pid;
 		int dbg_getchar[] = {6, 0, 0};
 		int *rq;
 
-        fprintf(stdout, "answer: value=0x%04x (%i)\n", 1,1);
 		while(1) {
 			// check whether we have new
 			rq = dbg_getchar;
@@ -146,6 +145,39 @@ int                 cnt, vid, pid;
                 fflush(stdout);
             }
 		}
+    } else if(strcasecmp(argv[1], "offset") == 0) {
+		if(argc != 3) {
+			usage();
+			return 0;
+		}
+
+		int chan;
+        int *rq;
+		chan = atoi(argv[2]);
+		int offset_start[] = {6,1,chan};
+		int offset_stop[] = {6,2,chan};
+
+        rq = offset_start;
+        
+        fprintf(stdout, "starting offset measuring for channel %i", chan);
+        cnt = usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN, rq[0], rq[1], rq[2], buffer, sizeof(buffer), 5000);
+        if(cnt < 0){
+            fprintf(stdout, "\nUSB error in iteration ?!?: %s\n", usb_strerror());
+        }
+
+        sleep(10);
+
+        rq = offset_stop;
+        fprintf(stdout, "stopping and retrieving...");
+        cnt = usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN, rq[0], rq[1], rq[2], buffer, sizeof(buffer), 5000);
+        if(cnt < 0){
+            fprintf(stdout, "\nUSB error in iteration ?!?: %s\n", usb_strerror());
+        }
+        rxIndex = ((int)buffer[1] & 0xff) | (((int)buffer[0] & 0xff) << 8);
+        fprintf(stdout, "measured offset %i", rxIndex);
+
+
+
     } else {
 		usage();
 	}