Furi (#24)

* furiac start and thread create implementation"

* create and kill task

* rename debug, add header

* remove write.c

* kill itself

* furi exit/switch

* success switch and exit

* WIP furi records

* add furi record interface

* rename furi app control file

* record implementation in progress

* wip furi implementation

* add automatic tests for FURI AC

* differ build tests

* small changes

* FURI record tests description

* change furi statuses

* FURI record test blank

* exit after all application ends

* delay: print then wait

* fix FURI implementatnion building

* pipe record test

* concurrent access

* uncomplete mute-test

* update FURI documentation

core/debug.c

@@ -0,0 +1,31 @@
+#define _GNU_SOURCE
+#include "main.h"
+#include <stdio.h>
+
+extern UART_HandleTypeDef DEBUG_UART;
+
+ssize_t uart_write(void* cookie, const char * buffer, size_t size) {
+    if (buffer == 0) {
+        /*
+         * This means that we should flush internal buffers.  Since we
+         * don't we just return.  (Remember, "handle" == -1 means that all
+         * handles should be flushed.)
+         */
+        return 0;
+    }
+    
+    return (ssize_t)HAL_UART_Transmit(&DEBUG_UART, (uint8_t*)buffer, (uint16_t)size, HAL_MAX_DELAY);
+}
+
+FILE* get_debug() {
+    FILE* fp = fopencookie(NULL, "w+", (cookie_io_functions_t){
+        .read  = NULL,
+        .write = uart_write,
+        .seek  = NULL,
+        .close = NULL
+    });
+
+    setvbuf(fp, NULL, _IONBF, 0);
+
+    return fp;
+}