Add wait-until-i2c-dies.js

usb/wait-until-i2c-dies.js

@@ -0,0 +1,30 @@
+#!/usr/bin/env node
+let uhk = require('./uhk');
+let [endpointIn, endpointOut] = uhk.getUsbEndpoints();
+var arg = process.argv[2] || '';
+let lastWatchdogCounter = -1;
+
+function monitorI2c() {
+    var payload = new Buffer([uhk.usbCommands.readDebugInfo]);
+//    console.log('Sending ', uhk.bufferToString(payload));
+    endpointOut.transfer(payload, function(err) {
+        if (err) {
+            console.error("USB error: %s", err);
+            process.exit(1);
+        }
+        endpointIn.transfer(64, function(err2, receivedBuffer) {
+            if (err2) {
+                console.error("USB error: %s", err2);
+                process.exit(2);
+            }
+            let watchdogCounter = (receivedBuffer[1] << 0) + (receivedBuffer[2] << 8) + (receivedBuffer[3] << 16) + (receivedBuffer[4] << 24);
+            if (watchdogCounter === lastWatchdogCounter) {
+                process.exit(0);
+            }
+//            console.log('Received', watchdogCounter);
+            setTimeout(monitorI2c, 100)
+        })
+    });
+}
+
+monitorI2c();