From 57319489d239cfef3e0a06195b63168c13f42396 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A1szl=C3=B3=20Monda?= <laci@monda.hu>
Date: Wed, 31 May 2017 02:24:55 +0200
Subject: [PATCH] Make the left half send only as many bytes of key state
 information as required.

---
 left/src/slave_protocol_handler.c | 5 ++---
 left/src/slave_protocol_handler.h | 3 +++
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/left/src/slave_protocol_handler.c b/left/src/slave_protocol_handler.c
index 9cc71de..e8719ea 100644
--- a/left/src/slave_protocol_handler.c
+++ b/left/src/slave_protocol_handler.c
@@ -33,9 +33,8 @@ void SlaveProtocolHandler(void)
     uint8_t commandId = SlaveRxBuffer[0];
     switch (commandId) {
         case SlaveCommand_GetKeyStates:
-            SlaveTxSize = KEYBOARD_MATRIX_COLS_NUM*KEYBOARD_MATRIX_ROWS_NUM;
-            BoolBytesToBits(keyMatrix.keyStates, SlaveTxBuffer, SlaveTxSize);
-//            memcpy(SlaveTxBuffer, keyMatrix.keyStates, SlaveTxSize);
+            SlaveTxSize = KEY_STATE_BUFFER_SIZE;
+            BoolBytesToBits(keyMatrix.keyStates, SlaveTxBuffer, LEFT_KEYBOARD_HALF_KEY_COUNT);
             break;
         case SlaveCommand_SetTestLed:
             SlaveTxSize = 0;
diff --git a/left/src/slave_protocol_handler.h b/left/src/slave_protocol_handler.h
index b773c23..d62519f 100644
--- a/left/src/slave_protocol_handler.h
+++ b/left/src/slave_protocol_handler.h
@@ -13,6 +13,9 @@
     #define PROTOCOL_RESPONSE_SUCCESS       0
     #define PROTOCOL_RESPONSE_GENERIC_ERROR 1
 
+    #define LEFT_KEYBOARD_HALF_KEY_COUNT (KEYBOARD_MATRIX_COLS_NUM*KEYBOARD_MATRIX_ROWS_NUM)
+    #define KEY_STATE_BUFFER_SIZE (LEFT_KEYBOARD_HALF_KEY_COUNT/8 + 1)
+
 // Variables:
 
     uint8_t SlaveRxBuffer[SLAVE_RX_BUFFER_SIZE];