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authorChristian Starkjohann <cs+github@obdev.at>2008-10-20 16:18:54 +0000
committerChristian Starkjohann <cs+github@obdev.at>2008-10-20 16:18:54 +0000
commit9d524fe5322c9059122a98c2e77b2cbb77b71897 (patch)
treee47037443755ba755ed4956770761b47982b0d7d /libs-device
parentaa85f496bdb1738ba162594f1be21bff901d9ca3 (diff)
downloadv-usb-9d524fe5322c9059122a98c2e77b2cbb77b71897.tar.gz
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- added comments about osctune
Diffstat (limited to 'libs-device')
-rw-r--r--libs-device/Readme.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/libs-device/Readme.txt b/libs-device/Readme.txt
index 7c0e311..76518dc 100644
--- a/libs-device/Readme.txt
+++ b/libs-device/Readme.txt
@@ -10,6 +10,12 @@ osccal.c and osccal.h
oscillator based on the USB frame clock. See osccal.h for a documentation
of the API.
+osctune.h
+ This header file contains a code snippet for usbconfig.h. With this code,
+ you can keep the AVR's internal RC oscillator in sync with the USB frame
+ clock. This is a continuous synchronization, not a single calibration at
+ USB reset as with osccal.c above. Please note that this code works only
+ if D- is wired to the interrupt, not D+.
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(c) 2008 by OBJECTIVE DEVELOPMENT Software GmbH.