add some helpful make targets

Makefile

@@ -1,2 +1,14 @@
-ota.bin: ./target/riscv32imc-unknown-none-elf/release/ecu-esp32
+IMAGE=./target/riscv32imc-unknown-none-elf/release/ecu-esp32
+
+$(IMAGE): $(wildcard ecu-esp32/src/*.rs)
+	echo $<
+	cargo build --release
+
+.PHONY: build
+build: $(IMAGE) Makefile
+
+ota.bin: $(IMAGE)
 	espflash save-image --chip esp32c3 $< $@
+
+install: ota.bin
+	time ruby otaclient.rb $<

otaclient.rb

@@ -2,7 +2,7 @@ require 'socket'
 
 sock = TCPSocket.new("eculocate.local", 5000)
 
-rom_image = File.read("ota.bin", mode: "rb")
+rom_image = File.read(ARGV[1], mode: "rb")
 
 image_len = rom_image.size