From 4c637c93ba69e33c77034eef9bd4433252e139fc Mon Sep 17 00:00:00 2001 From: Dean Camera Date: Sat, 11 Oct 2014 16:43:41 +1100 Subject: Add Leonardo compatibility to most bootloaders, run user application if BOOTRST fuse is set and the last reset cause was not the /RESET pin. --- Bootloaders/MassStorage/BootloaderMassStorage.txt | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) (limited to 'Bootloaders/MassStorage/BootloaderMassStorage.txt') diff --git a/Bootloaders/MassStorage/BootloaderMassStorage.txt b/Bootloaders/MassStorage/BootloaderMassStorage.txt index e09484793..467972cc4 100644 --- a/Bootloaders/MassStorage/BootloaderMassStorage.txt +++ b/Bootloaders/MassStorage/BootloaderMassStorage.txt @@ -62,9 +62,17 @@ * * \section Sec_Running Running the Bootloader * - * This bootloader is designed to be started via the HWB mechanism of the USB AVRs; ground the HWB pin (see device - * datasheet) then momentarily ground /RESET to start the bootloader. This assumes the HWBE fuse is set and the BOOTRST - * fuse is cleared. + * On the USB AVR8 devices, setting the \c HWBE device fuse will cause the bootloader to run if the \c HWB pin of + * the AVR is grounded when the device is reset. + * + * The are two behaviours of this bootloader, depending on the device's fuses: + * + * If the device's BOOTRST fuse is set, the bootloader will run any time the system is not reset from + * the external reset pin, unless no valid user application has been loaded. To initiate the bootloader, the + * device's external reset pin should be grounded. + * + * If the device's BOOTRST fuse is not set, the bootloader will run only if initiated via a software + * jump, or if the \c HWB pin was low during the last device reset (if the \c HWBE fuse is set). * * For board specific exceptions to the above, see below. * -- cgit v1.2.3