fix samd21 race condition with setup packet

reproduced with Adafruit_TinyUSB_ArduinoCore port commit 11d669b4d2a40eb2fc5e51b2a9707a6de9d42363 and SAMD BSP 1.6.1
2020-07-23 01:39:15 +07:00
parent 7d2fc12445
commit 0407cfe16c
8 changed files with 76 additions and 40 deletions
@@ -41,5 +41,11 @@ FREERTOS_PORT = ARM_CM0
 JLINK_DEVICE = ATSAMD21G18
 JLINK_IF = swd

-# flash using jlink
-flash: flash-jlink
+# flash using bossac at least version 1.8
+# can be found in arduino15/packages/arduino/tools/bossac/
+# Add it to your PATH or change BOSSAC variable to match your installation
+BOSSAC = bossac
+
+flash: $(BUILD)/$(BOARD)-firmware.bin
+	@:$(call check_defined, SERIAL, example: SERIAL=/dev/ttyACM0)
+	$(BOSSAC) --port=$(SERIAL) -U -i --offset=0x2000 -e -w $^ -R