IR transmit example (#180)

* DWT-based microsecond delay

* simple ir app (work only with NEC protocol and predefined address - command)

* remove space from file name, add delay_us_init_DWT header

* float-based delay us

* init tim2 by CubeMX

* fix simple pwm functions

* simple pwm timer based ir nec protocol

* ir gui test app

Co-authored-by: aanper <mail@s3f.ru>

applications/applications.mk

@@ -10,6 +10,7 @@ APP_RELEASE ?= 0
 ifeq ($(APP_RELEASE), 1)
 APP_MENU = 1
 APP_NFC  = 1
+BUILD_IRDA  = 1
 BUILD_EXAMPLE_BLINK = 1
 BUILD_EXAMPLE_UART_WRITE = 1
 BUILD_EXAMPLE_INPUT_DUMP = 1
@@ -142,6 +143,19 @@ APP_INPUT = 1
 APP_GUI = 1
 endif
 
+APP_IRDA?= 0
+ifeq ($(APP_IRDA), 1)
+CFLAGS		+= -DAPP_IRDA
+BUILD_IRDA = 1
+endif
+BUILD_IRDA ?= 0
+ifeq ($(BUILD_IRDA), 1)
+CFLAGS		+= -DBUILD_IRDA
+C_SOURCES	+= $(wildcard $(APP_DIR)/irda/*.c)
+APP_INPUT = 1
+APP_GUI = 1
+endif
+
 # device drivers
 
 APP_GUI	?= 0