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README.md

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+# Description
+
+Reacts to switching the joystick stick switch.
+
+## Principle of work
+
+The input receives a PWM signal from an RC receiver. For different stick positions there will be different duty cycle. By measuring its duration, you can determine the position of the stick and send a signal to the MC output.
+
+# Hardware
+
+Since my option was needed to turn on the LED backlight, I do not use external power and a powerful transistor. I also needed only one position.
+
+# Firwmware
+
+SDCC is used for compilation. You also need STM8S_SPL from ST - a library for working with peripherals.
+
+## How to flash
+
+I use stm8flash for flash.
+
+First of all, you need to configure Option bytes for hardware. For capturing, the 1st channel of the 1st timer is used (Channel 1 TIM1).
+
+```bash
+echo -ne '\x00\x00\xff\x01\xfe\x00\xff\x00\xff\x00\xff' > opt.bin
+stm8flash -c stlinkv2 -p stm8s103f3 -s opt -w opt.bin
+```
+
+This line activates alternative functions of the leg we need: Port C5 alternate function = TIM2_CH1; port C6 alternate function =TIM1_CH1; port C7 alternate function = TIM1_CH2.
+
+Then we are already flashing the firmware itself (firmware.bin). Here you can already use: make upload, or manually download stm8flash.
+
+```bash
+./stm8flash -c stlinkv2 -p stm8s003f3 -w firmware.ihx
+```