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samd21: Add support for entering Arduino bootloader via USB 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2018-12-05 21:26:51 -05:00
parent b84ecebf8f
commit 62fc5dc288
2 changed files with 9 additions and 1 deletions
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2
src/samd21/Makefile
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@ -51,4 +51,4 @@ lib/bossac/bin/bossac:
flash: $(OUT)klipper.bin lib/bossac/bin/bossac
@echo " Flashing $^ to $(FLASH_DEVICE) via bossac"
$(Q)if [ -z $(FLASH_DEVICE) ]; then echo "Please specify FLASH_DEVICE"; exit 1; fi
$(Q)lib/bossac/bin/bossac -U -p "$(FLASH_DEVICE)" --offset=0x2000 -w $(OUT)klipper.bin -v -b -R
$(Q)lib/bossac/bin/bossac -U -p "$(FLASH_DEVICE)" -a --offset=0x2000 -w $(OUT)klipper.bin -v -b -R

8
src/samd21/usbserial.c
View File

@ -5,7 +5,9 @@
// This file may be distributed under the terms of the GNU GPLv3 license.
#include <string.h> // memcpy
#include "autoconf.h" // CONFIG_FLASH_START
#include "board/io.h" // readl
#include "board/irq.h" // irq_disable
#include "board/usb_cdc.h" // usb_notify_ep0
#include "board/usb_cdc_ep.h" // USB_CDC_EP_BULK_IN
#include "internal.h" // enable_pclock
@ -171,6 +173,12 @@ usb_set_configure(void)
void
usb_request_bootloader(void)
{
if (CONFIG_FLASH_START) {
// Arduino Zero bootloader hack
irq_disable();
writel((void*)0x20007FFC, 0x07738135);
NVIC_SystemReset();
}
}
void