Changes between Version 9 and Version 10 of Docs/825gen2/Dev/Devices/USB

Timestamp:

01/18/24 15:27:08 (10 months ago)

Author:

Don Wilson

Comment:

--

Docs/825gen2/Dev/Devices/USB

@@ -160 +160 @@
 
 }}}
+
+
+To programmatically detect what is plugged into each port a structure such as this may be created
+{{{
+typedef struct
+{
+        const char* portName;
+        const char* sysfsPath;
+        const char* usb2sysfsPath;
+
+} USBPortInfo_t;
+
+const USBPortInfo_t usbPortInfo[] = {
+                { "USB2",       "/sys/bus/usb/devices/1-1.4",   NULL },
+                { "USB3-1",     "/sys/bus/usb/devices/2-1.1",   "/sys/bus/usb/devices/1-1.1" },
+                { "USB3-2",     "/sys/bus/usb/devices/2-1.2",   "/sys/bus/usb/devices/1-1.2" },
+                { "USB-C",      "/sys/bus/usb/devices/4-1",     NULL },
+};
+
+void ScanUSBports(void)
+{
+   int n;
+   char tmp[100];
+   struct stat st;
+   FILE* file;
+   const char* pathFound;
+
+   typedef enum { noUsb, usbFound, usb2Found } USBFound_t;
+
+   USBFound_t found = noUsb;
+
+   for(n = 0; n < ARRAY_ELEMS(usbPortInfo); n++) {
+      if(stat(usbPortInfo[n].sysfsPath, &st) == 0) {
+        found = usbFound;
+        pathFound = usbPortInfo[n].sysfsPath;
+      } else if((usbPortInfo[n].usb2sysfsPath != NULL) && (stat(usbPortInfo[n].usb2sysfsPath, &st) == 0)) {
+        found = usb2Found;
+        pathFound = usbPortInfo[n].usb2sysfsPath;
+      } else {
+        found = noUsb;
+      }
+
+      if(found != noUsb) {
+         sprintf_s(tmp, "%s/product", pathFound);
+         file = fopen(tmp, "r");
+         if(file != NULL) {
+            if(found == usb2Found) {
+               strcpy(tmp, "*USB2* ");
+               fgets(tmp + 7, sizeof(tmp) - 7, file);
+            } else {
+               fgets(tmp, sizeof(tmp), file);
+            }
+            printf("%s [%s]\r\n", usbPortInfo[n].portName, tmp);
+            fclose(file);
+        } 
+        
+    } 
+
+}}}