TFTP

Add initial doc

docs/tftp.md

@@ -0,0 +1,21 @@
+# TFTP
+This is the documentation of the TFTP task
+## Initialization
+The TFTP task is initialized in the main function.
+```c
+// Initialize TFTP task
+tftp_init();
+```
+## Usage
+The TFTP task is used to receive and send files via TFTP.
+### Receive a file
+index.txt contains a list of files on the file system.
+```bash
+tftp -g -r <filename> <ip>
+```
+### Send a file
+You can only write to the following files:
+- virtImage.raw
+```bash
+tftp -p -l <filename> <ip>
+```