From ba6fb7522c7333b3a9081a823f2b93a425b36022 Mon Sep 17 00:00:00 2001
From: Sam Anthony <sam@samanthony.xyz>
Date: Thu, 4 Sep 2025 19:05:46 -0400
Subject: fw: usb

---
 doc/protocol | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'doc')

diff --git a/doc/protocol b/doc/protocol
index ea9ecae..2273f40 100644
--- a/doc/protocol
+++ b/doc/protocol
@@ -1,6 +1,11 @@
 <command> ::= <opcode> " " <args> "\n"
 <response> ::= <retval> "\n"
 
+Echo:
+<opcode> ::= "e"
+<args> :: <bytes>
+<retval> :: <args>
+
 Write EEPROM:
 <opcode> ::= "w"
 <args> ::= <addr> <bytes>{:pagesize}
-- 
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