Add script which reads I2C errors.

packages/usb/get-slave-i2c-errors.js

@@ -0,0 +1,38 @@
+#!/usr/bin/env node
+const process = require('process');
+const uhk = require('./uhk');
+
+function getUint32(buffer, offset) {
+    return (buffer[offset]) + (buffer[offset+1] * 2**8) + (buffer[offset+2] * 2**16) + (buffer[offset+3] * 2**24);
+}
+
+function getUint16(buffer, offset) {
+    return (buffer[offset]) + (buffer[offset+1] * 2**8);
+}
+
+const slaveId = parseInt(process.argv[2]);
+
+const device = uhk.getUhkDevice();
+const sendData = new Buffer([uhk.usbCommands.getSlaveI2cErrors, slaveId]);
+device.write(uhk.getTransferData(sendData));
+const response = Buffer.from(device.readSync());
+
+console.log(response);
+let str = '';
+
+let status = response[0];
+
+if (status != 0) {
+    console.log('Invalid slave id');
+    process.exit(1);
+}
+
+let statusCount = response[1];
+
+for (let i=0; i<statusCount; i++) {
+    let status = getUint32(response, i*8+2);
+    let count = getUint32(response, i*8+4+2);
+    str += `${status}:${count} `;
+}
+
+console.log(str);

packages/usb/uhk.js

@@ -77,6 +77,7 @@ exports = module.exports = moduleExports = {
         getAdcValue             : 0x0c,
         setLedPwmBrightness     : 0x0d,
         getModuleProperty       : 0x0e,
+        getSlaveI2cErrors       : 0x0f,
     },
     enumerationModes: {
         bootloader: 0,