diff options
Diffstat (limited to 'usbdrv/usbconfig-prototype.h')
| -rw-r--r-- | usbdrv/usbconfig-prototype.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/usbdrv/usbconfig-prototype.h b/usbdrv/usbconfig-prototype.h index 71c7acf..238b45a 100644 --- a/usbdrv/usbconfig-prototype.h +++ b/usbdrv/usbconfig-prototype.h @@ -201,6 +201,14 @@ section at the end of this file). /* 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 +/* 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 + * per byte while the smaller one needs 61 to 69 cycles. The faster routine + * may be worth the 32 bytes bigger code size if you transmit lots of data and + * run the AVR close to its limit. + */ /* -------------------------- Device Description --------------------------- */ |