[FL-1906] Documentation: add Doxyfile, prepare sources for doxygen. (#741)

* Documentation: add Doxyfile, prepare sources for doxygen.

* Update ReadMe and remove obsolete CLA

* Add contribution guide

* Contributing: update text

* Correct spelling

firmware/targets/f6/furi-hal/furi-hal-flash.h

@@ -5,70 +5,88 @@
 #include <stddef.h>
 
 /** Get flash base address
- * @return pointer to flash base
+ *
+ * @return     pointer to flash base
  */
 size_t furi_hal_flash_get_base();
 
 /** Get flash read block size
- * @return size in bytes
+ *
+ * @return     size in bytes
  */
 size_t furi_hal_flash_get_read_block_size();
 
 /** Get flash write block size
- * @return size in bytes
+ *
+ * @return     size in bytes
  */
 size_t furi_hal_flash_get_write_block_size();
 
 /** Get flash page size
- * @return size in bytes
+ *
+ * @return     size in bytes
  */
 size_t furi_hal_flash_get_page_size();
 
 /** Get expected flash cycles count
- * @return count of erase-write operations 
+ *
+ * @return     count of erase-write operations
  */
 size_t furi_hal_flash_get_cycles_count();
 
 /** Get free flash start address
- * @return pointer to free region start
+ *
+ * @return     pointer to free region start
  */
 const void* furi_hal_flash_get_free_start_address();
 
 /** Get free flash end address
- * @return pointer to free region end
+ *
+ * @return     pointer to free region end
  */
 const void* furi_hal_flash_get_free_end_address();
 
 /** Get first free page start address
- * @return first free page memory address
+ *
+ * @return     first free page memory address
  */
 size_t furi_hal_flash_get_free_page_start_address();
 
 /** Get free page count
- * @return free page count
+ *
+ * @return     free page count
  */
 size_t furi_hal_flash_get_free_page_count();
 
-/*
- * Erase Flash
+/** Erase Flash
+ *
  * Locking operation, uses HSEM to manage shared access.
- * @param page, page number
- * @param count, page count to erase
+ *
+ * @param      page   page number
+ * @param      count  page count to erase
+ *
+ * @return     true on success
  */
 bool furi_hal_flash_erase(uint8_t page, uint8_t count);
 
-/*
- * Write double word (64 bits)
+/** Write double word (64 bits)
+ *
  * Locking operation, uses HSEM to manage shared access.
- * @param address - destination address, must be double word aligned.
- * @param data - data to write
+ *
+ * @param      address  destination address, must be double word aligned.
+ * @param      data     data to write
+ *
+ * @return     true on success
  */
 bool furi_hal_flash_write_dword(size_t address, uint64_t data);
 
-/*
- * Write double word (64 bits) from address
+/** Write double word (64 bits) from address
+ *
  * Locking operation, uses HSEM to manage shared access.
- * @param address - destination address, must be block aligned
- * @param source_address - source address
+ *
+ * @param      address         destination address, must be block aligned
+ * @param      source_address  source address
+ *
+ * @return     true on success
  */
 bool furi_hal_flash_write_dword_from(size_t address, size_t source_address);

firmware/targets/f6/furi-hal/furi-hal-subghz.c

@@ -290,14 +290,6 @@ void furi_hal_subghz_load_preset(FuriHalSubGhzPreset preset) {
     }
 }
 
-uint8_t furi_hal_subghz_get_status() {
-    const FuriHalSpiDevice* device = furi_hal_spi_device_get(FuriHalSpiDeviceIdSubGhz);
-    CC1101StatusRaw st;
-    st.status = cc1101_get_status(device);
-    furi_hal_spi_device_return(device);
-    return st.status_raw;
-}
-
 void furi_hal_subghz_load_registers(const uint8_t data[][2]) {
     const FuriHalSpiDevice* device = furi_hal_spi_device_get(FuriHalSpiDeviceIdSubGhz);
     cc1101_reset(device);