From: Jonathan McDowell <noodles@earth.li>
Date: Sat, 14 Jan 2017 11:41:14 +0000 (+0000)
Subject: Use existing OSCCAL as starting point for calibration
X-Git-Url: https://the.earth.li/gitweb/?a=commitdiff_plain;h=197a3de5d357296015fe30c4300946231b8133eb;p=riso-kagaku-clone.git

Use existing OSCCAL as starting point for calibration

If we're being loaded from micronucleus it will have already
performed calibration on OSCCAL, so use that as the starting point
for our recalibration. This seems to improve things on an older Dell
host that previously had issues enumerating the device.
---

diff --git a/libs-device/osccalASM.S b/libs-device/osccalASM.S
index 60d6fb9..dd9379e 100644
--- a/libs-device/osccalASM.S
+++ b/libs-device/osccalASM.S
@@ -93,7 +93,7 @@ calibrateOscillatorASM:
 	cli
 	ldi		opD, 255
 
-	ldi		try, 128	; calibration start value
+	in		try, OSCCAL	; calibration start value
 	ldi		stp, 64		; initial step width
 	ldi		i, 10		; 10 iterations