From 4d5427f949bd0539c0506b0a751eac190637f1a2 Mon Sep 17 00:00:00 2001
From: John-Mark Gurney <jmg@funkthat.com>
Date: Thu, 27 Aug 2020 03:48:08 +0000
Subject: [PATCH] minor comments about the delay..

---
 CCDebugger.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/CCDebugger.c b/CCDebugger.c
index 12ebed2..f15af81 100644
--- a/CCDebugger.c
+++ b/CCDebugger.c
@@ -176,6 +176,7 @@ uint8_t cc_error()
  */
 struct timespec tp={0,0};
 static int cc_delay_mult=80;
+/* delay d * .4 us */
 void cc_delay( unsigned int d )
 {
   volatile unsigned int i = cc_delay_mult*d;
@@ -193,6 +194,10 @@ void cc_setmult(int mult)
 /* provas konsideri la rapidecon de la procesoro */
 void cc_delay_calibrate( )
 {
+#if 1
+  /* The ioctl overhead on FreeBSD far exceeds min timing */
+  cc_delay_mult = 0;
+#else
   long time0=micros();
   cc_delay(200);
   cc_delay(200);
@@ -200,7 +205,11 @@ void cc_delay_calibrate( )
   cc_delay(200);
   cc_delay(200);
   long time1=micros();
+  /* make 1000 delay units == 400us */
   cc_delay_mult=cc_delay_mult*400/(time1-time0);
+  printf("time0: %ld, time1: %ld, time1-time0: %ld\n", time0, time1, time1 - time0);
+  printf("dmul: %d\n", cc_delay_mult);
+#endif
 }
 
 /**