Before git init

NTP/Core/Src/debug.c

@@ -0,0 +1,47 @@
+/*
+ * debug.c
+ *
+ *  Created on: Oct 7, 2022
+ *      Author: sanderspeetjens
+ */
+#include "debug.h"
+
+extern UART_HandleTypeDef huart1;
+
+int _write(int file, char *ptr, int len) {
+    HAL_StatusTypeDef xStatus;
+    switch (file) {
+    case STDOUT_FILENO: /*stdout*/
+		xStatus = HAL_UART_Transmit(&huart1, (uint8_t*)ptr, len, HAL_MAX_DELAY);
+		if (xStatus != HAL_OK) {
+			errno = EIO;
+			return -1;
+		}
+        break;
+    case STDERR_FILENO: /* stderr */
+		xStatus = HAL_UART_Transmit(&huart1, (uint8_t*)ptr, len, HAL_MAX_DELAY);
+		if (xStatus != HAL_OK) {
+			errno = EIO;
+			return -1;
+		}
+        break;
+    default:
+        errno = EBADF;
+        return -1;
+    }
+    return len;
+}
+
+int _read(int fd, char* ptr, int len) {
+  HAL_StatusTypeDef hstatus;
+
+  if (fd == STDIN_FILENO) {
+    hstatus = HAL_UART_Receive(&huart1, (uint8_t *) ptr, 1, HAL_MAX_DELAY);
+    if (hstatus == HAL_OK)
+      return 1;
+    else
+      return EIO;
+  }
+  errno = EBADF;
+  return -1;
+}