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| author | Bluebie <a@creativepony.com> | 2012-10-04 13:59:25 +1000 |
|---|---|---|
| committer | Bluebie <a@creativepony.com> | 2012-10-04 13:59:25 +1000 |
| commit | 66b662fc71061e874bef879820112b397f04e746 (patch) | |
| tree | 77f1b9b44964e29064a75936e28126f36b6a6cd8 /firmware/bootloaderconfig.h | |
| parent | 239ed251b8adbeff9225e1fbabf04a73ecd9f1a1 (diff) | |
| download | micronucleus-66b662fc71061e874bef879820112b397f04e746.tar.gz micronucleus-66b662fc71061e874bef879820112b397f04e746.tar.bz2 micronucleus-66b662fc71061e874bef879820112b397f04e746.zip | |
Added low power mode, for chips which need to start with clkdiv8 and only switch to 16.5mhz when usb connection is detected somehow.
Diffstat (limited to 'firmware/bootloaderconfig.h')
| -rw-r--r-- | firmware/bootloaderconfig.h | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/firmware/bootloaderconfig.h b/firmware/bootloaderconfig.h index 9869b72..b443d6e 100644 --- a/firmware/bootloaderconfig.h +++ b/firmware/bootloaderconfig.h @@ -16,7 +16,6 @@ #define BOOTLOADER_ADDRESS 0 #endif - /* General Description: This file (together with some settings in Makefile) configures the boot loader @@ -207,9 +206,22 @@ these macros are defined, the boot loader uses them. #define AUTO_EXIT_MS 2500 //#define AUTO_EXIT_CONDITION() (idlePolls > (AUTO_EXIT_MS * 10UL)) +// uncomment for chips with clkdiv8 enabled in fuses +//#define LOW_POWER_MODE 1 +// restore cpu speed calibration back to 8/16mhz instead of 8.25/16.5mhz +//#define RESTORE_OSCCAL 1 +// set clock prescaler to a value before running user program +//#define SET_CLOCK_PRESCALER _BV(CLKPS0) /* divide by 2 for 8mhz */ #define bootLoaderCondition() (idlePolls < (AUTO_EXIT_MS * 10UL)) - +#if LOW_POWER_MODE + // only starts bootloader if USB D- is pulled high on startup - by putting your pullup in to an external connector + // you can avoid ever entering an out of spec clock speed or waiting on bootloader when that pullup isn't there + #define bootLoaderStartCondition() \ + (PINB & (_BV(USB_CFG_DMINUS_BIT) | _BV(USB_CFG_DMINUS_BIT))) == _BV(USB_CFG_DMINUS_BIT) +#else + #define bootLoaderStartCondition() 1 +#endif /* ----------------------- Optional MCU Description ------------------------ */ |