1 files changed, 4 insertions, 3 deletions
diff --git a/Makefile b/Makefile
index a78d29f..2ef73a4 100644
--- a/Makefile
+++ b/Makefile
@@ -8,7 +8,6 @@ USBVID = 239a
 USBPID = '001e|801e'
 
 BOSSAC = bossac
-SERIAL = $(shell ./find-serial-port $(USBVID) $(USBPID) || echo 'cant-find-serial-port')
 OFFSET = 0x2000
 
 OBJCOPY = arm-none-eabi-objcopy
@@ -35,8 +34,10 @@ cargo-build:
 
 $(OUTDIR)/$(APP): cargo-build
 
-flash: $(APP).bin $(SERIAL)
-	$(BOSSAC) -R -e -w -v -o$(OFFSET) -p$(SERIAL) $<
+flash: $(APP).bin
+	feather-cmd dfu
+	sleep 2
+	$(BOSSAC) -R -e -w -v -o$(OFFSET) -p`./find-serial-port $(USBVID) $(USBPID)` $<
 
 qemu: $(OUTDIR)/$(APP)
 	qemu-system-arm -d in_asm,int,exec,cpu,guest_errors,unimp -pidfile qemu.pid -cpu cortex-m0 -machine lm3s6965evb -nographic -semihosting-config enable=on,target=native -s -S -kernel $<