*

firmware/shared/syscalls.c

@@ -0,0 +1,119 @@
+/*
+ * syscalls.c
+ *
+ *  Created on: 15 θών 2015 γ.
+ *      Author: Sergey
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include "hal_library.h"
+#include "board.h"
+
+extern UART_HandleTypeDef CONSOLE_UART;
+
+extern int errno;
+register char * stack_ptr asm("sp");
+
+caddr_t _sbrk(int incr) {
+	extern char end asm("end");
+	static char *heap_end;
+	char *prev_heap_end;
+
+	if (heap_end == 0)
+		heap_end = &end;
+
+	prev_heap_end = heap_end;
+	if (heap_end + incr > stack_ptr) {
+		errno = ENOMEM;
+		return (caddr_t) -1;
+	}
+
+	heap_end += incr;
+	return (caddr_t) prev_heap_end;
+}
+
+
+#ifndef __errno_r
+#include <sys/reent.h>
+#define __errno_r(reent) reent->_errno
+#endif
+
+
+int _write_r(struct _reent *r, int file, char * ptr, int len){
+  (void)r;
+  (void)file;
+  (void)ptr;
+
+  while (HAL_UART_GetState(&CONSOLE_UART) == HAL_UART_STATE_BUSY_TX ||
+		  HAL_UART_GetState(&CONSOLE_UART) == HAL_UART_STATE_BUSY_TX_RX)
+  {
+
+  }
+
+  //HAL_UART_Transmit_IT(&CONSOLE_UART, (uint8_t*)ptr, len);
+  HAL_UART_Transmit(&CONSOLE_UART, (uint8_t*)ptr, len, HAL_MAX_DELAY);
+
+  return len;
+}
+
+int _read_r(struct _reent *r, int file, char * ptr, int len)
+{
+  (void)r;
+  (void)file;
+  (void)ptr;
+  (void)len;
+  __errno_r(r) = EINVAL;
+  return -1;
+}
+
+int _lseek_r(struct _reent *r, int file, int ptr, int dir){
+  (void)r;
+  (void)file;
+  (void)ptr;
+  (void)dir;
+  return 0;
+}
+
+int _close_r(struct _reent *r, int file){
+    (void)r;
+    (void)file;
+    return 0;
+}
+
+int _open_r ( struct _reent *ptr, const char *file, int flags, int mode ){
+   int fd = -1;
+   return fd;
+}
+
+int _fstat_r(struct _reent *r, int file, struct stat * st){
+    (void)r;
+    (void)file;
+    memset(st, 0, sizeof(*st));
+    st->st_mode = S_IFCHR;
+    return 0;
+}
+
+int _isatty_r(struct _reent *r, int fd){
+    (void)r;
+    (void)fd;
+    return 1;
+}
+
+int _kill (int a, int b){
+	(void)a;
+	(void)b;
+	return 0;
+}
+
+int _getpid(int a){
+	(void)a;
+	return 0;
+}
+
+void _exit(int status){
+	for(;;);
+}