From 19489af153bd16201c11fb748ea61ecd758720f6 Mon Sep 17 00:00:00 2001
From: jflyper <shinoda@jaist.ac.jp>
Date: Thu, 31 Aug 2017 04:02:15 +0900
Subject: [PATCH] Avoid N-Channel for RX side

---
 src/main/drivers/serial_escserial.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/main/drivers/serial_escserial.c b/src/main/drivers/serial_escserial.c
index 31bd3b720..25feddb38 100644
--- a/src/main/drivers/serial_escserial.c
+++ b/src/main/drivers/serial_escserial.c
@@ -660,6 +660,10 @@ static serialPort_t *openEscSerial(escSerialPortIndex_e portIndex, serialReceive
 
     if (mode != PROTOCOL_KISSALL) {
         escSerial->rxTimerHardware = &(timerHardware[output]);
+        // N-Channels can't be used as RX.
+        if (escSerial->rxTimerHardware->output & TIMER_OUTPUT_N_CHANNEL) {
+            return NULL;
+        }
 #ifdef USE_HAL_DRIVER
         escSerial->rxTimerHandle = timerFindTimerHandle(escSerial->rxTimerHardware->tim);
 #endif