From 641d292c33522dc78e144524f70e2f7695836158 Mon Sep 17 00:00:00 2001
From: Caitlin Hennessy <caitlin.hennessy@microsoft.com>
Date: Wed, 13 Dec 2017 14:55:14 -0800
Subject: [PATCH] Clean commit for motor fix

---
 libs/core/output.ts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libs/core/output.ts b/libs/core/output.ts
index 7f982cb8..c5e42ef3 100644
--- a/libs/core/output.ts
+++ b/libs/core/output.ts
@@ -34,6 +34,7 @@ namespace motors {
         pwmMM = control.mmap("/dev/lms_pwm", 0, 0)
         if (!pwmMM) control.fail("no PWM file")
         motorMM = control.mmap("/dev/lms_motor", MotorDataOff.Size * DAL.NUM_OUTPUTS, 0)
+        if (!motorMM) control.fail("no motor file")
 
         resetMotors()
 
@@ -262,6 +263,7 @@ namespace motors {
 
     // only a single output at a time
     function getMotorData(out: Output): MotorData {
+        init()
         let buf = motorMM.slice(outOffset(out), MotorDataOff.Size)
         return {
             actualSpeed: buf.getNumber(NumberFormat.Int8LE, MotorDataOff.Speed),