diff options
Diffstat (limited to 'firmware/configuration/t85_default/bootloaderconfig.h')
| -rw-r--r-- | firmware/configuration/t85_default/bootloaderconfig.h | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/firmware/configuration/t85_default/bootloaderconfig.h b/firmware/configuration/t85_default/bootloaderconfig.h index 32beedf..f86b3ac 100644 --- a/firmware/configuration/t85_default/bootloaderconfig.h +++ b/firmware/configuration/t85_default/bootloaderconfig.h @@ -167,29 +167,30 @@ /* * Defines the setting of the RC-oscillator calibration after quitting the bootloader. (OSCCAL) * - * OSCCAL_RESTORE Set this to '1' to revert to factory calibration, which is 16.0 MHZ +/-10% + * OSCCAL_RESTORE_DEFAULT Set this to '1' to revert to OSCCAL factore calibration after bootlaoder exit. + * This is 8 MHz +/-2% on most devices or 16 MHz on the ATtiny 85 with activated PLL. * Adds ~14 bytes. * - * OSCCAL_16.5MHz Set this to '1' to use the same calibration as during program upload. - * This value is 16.5Mhz +/-1% as calibrated from the USB timing. Please note + * OSCCAL_SAVE_CALIB Set this to '1' to save the OSCCAL calibration during program upload. + * This value will be reloaded after reset and will also be used for the user + * program unless "OSCCAL_RESTORE_DEFAULT" is active. This allows calibrate the internal + * RC oscillator to the F_CPU target frequency +/-1% from the USB timing. Please note * that only true if the ambient temperature does not change. - * This is the default behaviour of the original Digispark and is not recommended - * for use on devices other than the ATtiny85. * Adds ~38 bytes. * * OSCCAL_HAVE_XTAL Set this to '1' if you have an external crystal oscillator. In this case no attempt * will be made to calibrate the oscillator. You should deactivate both options above * if you use this to avoid redundant code. * - * If both options are selected, OSCCAL_RESTORE takes precedence. + * If both options are selected, OSCCAL_RESTORE_DEFAULT takes precedence. * - * If no option is selected, OSCCAL will be left untouched and stays at either 16.0 Mhz or 16.5 Mhz depending + * If no option is selected, OSCCAL will be left untouched and stays at either factory calibration or F_CPU depending * on whether the bootloader was activated. This will take the least memory. You can use this if your program * comes with its own OSCCAL calibration or an external clock source is used. */ -#define OSCCAL_RESTORE 0 -#define OSCCAL_16_5MHz 1 +#define OSCCAL_RESTORE_DEFAULT 0 +#define OSCCAL_SAVE_CALIB 1 #define OSCCAL_HAVE_XTAL 0 /* |