From a8b247bb0e80c70bd7a7f3ba93cb697c99401e4f Mon Sep 17 00:00:00 2001
From: Daniel Kao <daniel.m.kao@gmail.com>
Date: Sat, 16 Nov 2019 03:57:33 -0800
Subject: [PATCH] Change polling interval to a regular 1ms

Motion burst + analog reads takes around 408us.
The total 408us + 870us wait doesn't seem necessary.
---
 firmware/production/production.ino | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/firmware/production/production.ino b/firmware/production/production.ino
index fb31de4..1350e0f 100644
--- a/firmware/production/production.ino
+++ b/firmware/production/production.ino
@@ -416,12 +416,13 @@ void loop() {
   }
 
   byte burstBuffer[12];
-  unsigned long elapsed = micros() - lastTS;
+  unsigned long curTime = micros();
+  unsigned long elapsed = curTime - lastTS;
 
   checkButtonState();
 
   // polling interval : more than > 0.5 ms.
-  if (elapsed > 870) { // 870...whut?
+  if (elapsed >= 1000) {
     adnsComBegin();
     SPI.beginTransaction(SPISettings(SPIMAXIMUMSPEED, MSBFIRST, SPI_MODE3));
 
@@ -460,6 +461,6 @@ void loop() {
       dy = 0;
     }
 
-    lastTS = micros();
+    lastTS = curTime;
   }
 }