Naming and coding style convention, new linter tool. (#945)

* Makefile, Scripts: new linter
* About: remove ID from IC
* Firmware: remove double define for DIVC/DIVR
* Scripts: check folder names too. Docker: replace syntax check with make lint.
* Reformat Sources and Migrate to new file naming convention
* Docker: symlink clang-format-12 to clang-format
* Add coding style guide

firmware/targets/furi_hal_include/furi_hal_rfid.h

@@ -0,0 +1,114 @@
+/**
+ * @file furi_hal_rfid.h
+ * RFID HAL API
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <main.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Initialize RFID subsystem
+ */
+void furi_hal_rfid_init();
+
+/** Config rfid pins to reset state
+ */
+void furi_hal_rfid_pins_reset();
+
+/** Config rfid pins to emulate state
+ */
+void furi_hal_rfid_pins_emulate();
+
+/** Config rfid pins to read state
+ */
+void furi_hal_rfid_pins_read();
+
+/** Release rfid pull pin
+ */
+void furi_hal_rfid_pin_pull_release();
+
+/** Pulldown rfid pull pin
+ */
+void furi_hal_rfid_pin_pull_pulldown();
+
+/** Config rfid timer to read state
+ *
+ * @param      freq        timer frequency
+ * @param      duty_cycle  timer duty cycle, 0.0-1.0
+ */
+void furi_hal_rfid_tim_read(float freq, float duty_cycle);
+
+/** Start read timer
+ */
+void furi_hal_rfid_tim_read_start();
+
+/** Stop read timer
+ */
+void furi_hal_rfid_tim_read_stop();
+
+/** Config rfid timer to emulate state
+ *
+ * @param      freq  timer frequency
+ */
+void furi_hal_rfid_tim_emulate(float freq);
+
+/** Start emulation timer
+ */
+void furi_hal_rfid_tim_emulate_start();
+
+/** Stop emulation timer
+ */
+void furi_hal_rfid_tim_emulate_stop();
+
+/** Config rfid timers to reset state
+ */
+void furi_hal_rfid_tim_reset();
+
+/** Check that timer instance is emulation timer
+ *
+ * @param      hw    timer instance
+ *
+ * @return     true if instance is emulation timer
+ */
+bool furi_hal_rfid_is_tim_emulate(TIM_HandleTypeDef* hw);
+
+/** Set emulation timer period
+ *
+ * @param      period  overall duration
+ */
+void furi_hal_rfid_set_emulate_period(uint32_t period);
+
+/** Set emulation timer pulse
+ *
+ * @param      pulse  duration of high level
+ */
+void furi_hal_rfid_set_emulate_pulse(uint32_t pulse);
+
+/** Set read timer period
+ *
+ * @param      period  overall duration
+ */
+void furi_hal_rfid_set_read_period(uint32_t period);
+
+/** Set read timer pulse
+ *
+ * @param      pulse  duration of high level
+ */
+void furi_hal_rfid_set_read_pulse(uint32_t pulse);
+
+/** Сhanges the configuration of the RFID timer "on a fly"
+ *
+ * @param      freq        new frequency
+ * @param      duty_cycle  new duty cycle
+ */
+void furi_hal_rfid_change_read_config(float freq, float duty_cycle);
+
+#ifdef __cplusplus
+}
+#endif