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| author | Tim <cpldcpu@gmail.com> | 2015-07-26 20:28:13 +0200 |
|---|---|---|
| committer | Tim <cpldcpu@gmail.com> | 2015-07-26 20:28:13 +0200 |
| commit | 3e01026caa72cc1cf25bddf3158dea4f439dd169 (patch) | |
| tree | ea384817b369de8dd66e1fc19b6c0b369415e006 /firmware/usbconfig.h | |
| parent | c2c3125d000b34b7b828e364b43216069aea5878 (diff) | |
| parent | 4362370cd98492d761a3e19e84da007163378464 (diff) | |
| download | micronucleus-3e01026caa72cc1cf25bddf3158dea4f439dd169.tar.gz micronucleus-3e01026caa72cc1cf25bddf3158dea4f439dd169.tar.bz2 micronucleus-3e01026caa72cc1cf25bddf3158dea4f439dd169.zip | |
Merge pull request #66 from micronucleus/Testing-V2.1v2.0b
Pull request for V2.1
Diffstat (limited to 'firmware/usbconfig.h')
| -rw-r--r-- | firmware/usbconfig.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/firmware/usbconfig.h b/firmware/usbconfig.h index 65864df..7ca31c5 100644 --- a/firmware/usbconfig.h +++ b/firmware/usbconfig.h @@ -184,7 +184,18 @@ return;\ /* define this macro to 1 if you want the function usbMeasureFrameLength() * compiled in. This function can be used to calibrate the AVR's RC oscillator. */ -#define USB_USE_FAST_CRC 0 + + +#if USB_CFG_CLOCK_KHZ<16000 + #define USB_USE_FAST_CRC 1 +#else + #define USB_USE_FAST_CRC 0 +#endif + +/* If the CPU clock is below 16Mhz you have to use the faster CRC routines. + * otherwise time outs may occur on USB3.0 ports. This adds 20 bytes. + */ + /* The assembler module has two implementations for the CRC algorithm. One is * faster, the other is smaller. This CRC routine is only used for transmitted * messages where timing is not critical. The faster routine needs 31 cycles |