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| author | Christian Starkjohann <cs+github@obdev.at> | 2017-01-24 22:57:33 +0100 |
|---|---|---|
| committer | Christian Starkjohann <cs+github@obdev.at> | 2017-01-24 22:57:33 +0100 |
| commit | 4658fc9b4759bf70abd0c4eba1c4c6faa6f9b0ff (patch) | |
| tree | 000a37374e5d9bc6a32e6a0b60b43f633c7a022b | |
| parent | 59f435f29380769e013c6defd85cb22a81982c46 (diff) | |
| download | v-usb-4658fc9b4759bf70abd0c4eba1c4c6faa6f9b0ff.tar.gz v-usb-4658fc9b4759bf70abd0c4eba1c4c6faa6f9b0ff.tar.bz2 v-usb-4658fc9b4759bf70abd0c4eba1c4c6faa6f9b0ff.zip | |
Added comment about improved osccal implementation in assembler.
| -rw-r--r-- | libs-device/osccal.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/libs-device/osccal.c b/libs-device/osccal.c index c1bff32..ea170ec 100644 --- a/libs-device/osccal.c +++ b/libs-device/osccal.c @@ -16,6 +16,12 @@ /* ------------------------ Oscillator Calibration ------------------------- */ /* ------------------------------------------------------------------------- */ +/* This is a "C" implementation. You can customize it to your needs easily. + * If you want smaller code size, there is an improved version in the + * micronucleous project. See + * https://github.com/micronucleus/micronucleus/blob/master/firmware/osccalASM.S + */ + /* Calibrate the RC oscillator. Our timing reference is the Start Of Frame * signal (a single SE0 bit) repeating every millisecond immediately after * a USB RESET. We first do a binary search for the OSCCAL value and then |