WIP target lo

custom debug stream

run docker with project dir, specify dir to makefile

remove unused includes

fix broken F1

app/write.c

@@ -1,39 +1,10 @@
-/*******************
- *
- * Copyright 1998-2010 IAR Systems AB.  
- *
- * This is a template implementation of the "__write" function used by
- * the standard library.  Replace it with a system-specific
- * implementation.
- *
- * The "__write" function should output "size" number of bytes from
- * "buffer" in some application-specific way.  It should return the
- * number of characters written, or _LLIO_ERROR on failure.
- *
- * If "buffer" is zero then __write should perform flushing of
- * internal buffers, if any.  In this case "handle" can be -1 to
- * indicate that all handles should be flushed.
- *
- * The template implementation below assumes that the application
- * provides the function "MyLowLevelPutchar".  It should return the
- * character written, or -1 on failure.
- *
- ********************/
-
-// #include <yfuns.h>
+#define _GNU_SOURCE
 #include "main.h"
-#include "cmsis_os.h"
+#include <stdio.h>
 
 extern UART_HandleTypeDef DEBUG_UART;
 
-
-/*
- * If the __write implementation uses internal buffering, uncomment
- * the following line to ensure that we are called with "buffer" as 0
- * (i.e. flush) when the application terminates.
- */
-
-size_t _write(int handle, const unsigned char * buffer, size_t size) {
+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
@@ -43,7 +14,18 @@ size_t _write(int handle, const unsigned char * buffer, size_t size) {
         return 0;
     }
     
-    HAL_UART_Transmit(&DEBUG_UART, (uint8_t*)buffer, (uint16_t)size, HAL_MAX_DELAY);
-
-    return (int)size;
+    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;
+}