From c41e2f2680c418776fb4171a3cc1298de4cdd1a6 Mon Sep 17 00:00:00 2001
From: Auster <iAuster@ya.ru>
Date: Mon, 4 Dec 2023 02:28:45 +0000
Subject: [PATCH] Allow CRSF RX binding via cli (#13119)

---
 src/main/rx/crsf.c           | 18 ++++++++++++++++++
 src/main/rx/crsf.h           |  1 +
 src/main/rx/crsf_protocol.h  |  5 +++++
 src/main/rx/rx_bind.c        | 11 ++++++++++-
 src/main/target/common_pre.h |  1 +
 5 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/src/main/rx/crsf.c b/src/main/rx/crsf.c
index eb2c0788b1..fe167105b9 100644
--- a/src/main/rx/crsf.c
+++ b/src/main/rx/crsf.c
@@ -681,4 +681,22 @@ bool crsfRxIsActive(void)
 {
     return serialPort != NULL;
 }
+
+void crsfRxBind(void)
+{
+    if (serialPort != NULL) {
+        uint8_t bindFrame[] = {
+            CRSF_SYNC_BYTE,
+            0x07,  // frame length
+            CRSF_FRAMETYPE_COMMAND,
+            CRSF_ADDRESS_CRSF_RECEIVER,
+            CRSF_ADDRESS_FLIGHT_CONTROLLER,
+            CRSF_COMMAND_SUBCMD_RX,
+            CRSF_COMMAND_SUBCMD_RX_BIND,
+            0x9E,  // Command CRC8
+            0xE8,  // Packet CRC8
+        };
+        serialWriteBuf(serialPort, bindFrame, 9);
+    }
+}
 #endif
diff --git a/src/main/rx/crsf.h b/src/main/rx/crsf.h
index a1ae3c80be..37b6ac138f 100644
--- a/src/main/rx/crsf.h
+++ b/src/main/rx/crsf.h
@@ -88,3 +88,4 @@ bool crsfRxInit(const struct rxConfig_s *initialRxConfig, struct rxRuntimeState_
 void crsfRxUpdateBaudrate(uint32_t baudrate);
 bool crsfRxUseNegotiatedBaud(void);
 bool crsfRxIsActive(void);
+void crsfRxBind(void);
diff --git a/src/main/rx/crsf_protocol.h b/src/main/rx/crsf_protocol.h
index 71a6bf50d3..0b56233f5c 100644
--- a/src/main/rx/crsf_protocol.h
+++ b/src/main/rx/crsf_protocol.h
@@ -60,9 +60,14 @@ typedef enum {
 } crsfFrameType_e;
 
 enum {
+    CRSF_COMMAND_SUBCMD_RX = 0x10,    // receiver command
     CRSF_COMMAND_SUBCMD_GENERAL = 0x0A,    // general command
 };
 
+enum {
+    CRSF_COMMAND_SUBCMD_RX_BIND = 0x01,    // bind command
+};
+
 enum {
     CRSF_COMMAND_SUBCMD_GENERAL_CRSF_SPEED_PROPOSAL = 0x70,    // proposed new CRSF port speed
     CRSF_COMMAND_SUBCMD_GENERAL_CRSF_SPEED_RESPONSE = 0x71,    // response to the proposed CRSF port speed
diff --git a/src/main/rx/rx_bind.c b/src/main/rx/rx_bind.c
index 170e9b7ec6..f7748340a5 100644
--- a/src/main/rx/rx_bind.c
+++ b/src/main/rx/rx_bind.c
@@ -24,12 +24,13 @@
 
 #include "rx/rx_spi_common.h"
 #include "rx/srxl2.h"
+#include "rx/crsf.h"
 
 #include "rx_bind.h"
 
 static bool doRxBind(bool doBind)
 {
-#if !defined(USE_SERIALRX_SRXL2) && !defined(USE_RX_FRSKY_SPI) && !defined(USE_RX_SFHSS_SPI) && !defined(USE_RX_FLYSKY) && !defined(USE_RX_SPEKTRUM) && !defined(USE_RX_EXPRESSLRS)
+#if !defined(USE_SERIALRX_SRXL2) && !defined(USE_RX_FRSKY_SPI) && !defined(USE_RX_SFHSS_SPI) && !defined(USE_RX_FLYSKY) && !defined(USE_RX_SPEKTRUM) && !defined(USE_RX_EXPRESSLRS) && !defined(USE_RX_CRSF)
     UNUSED(doBind);
 #endif
 
@@ -40,6 +41,14 @@ static bool doRxBind(bool doBind)
         switch (rxRuntimeState.serialrxProvider) {
         default:
             return false;
+#if defined(USE_RX_CRSF)
+        case SERIALRX_CRSF:
+            if (doBind) {
+                crsfRxBind();
+            }
+
+            break;
+#endif
 #if defined(USE_SERIALRX_SRXL2)
         case SERIALRX_SRXL2:
             if (doBind) {
diff --git a/src/main/target/common_pre.h b/src/main/target/common_pre.h
index 81133f0178..da8f9ffa18 100644
--- a/src/main/target/common_pre.h
+++ b/src/main/target/common_pre.h
@@ -153,6 +153,7 @@
 #define USE_RX_SPI
 
 #define USE_RX_CC2500
+#define USE_RX_CRSF
 #define USE_RX_EXPRESSLRS
 #define USE_RX_SX1280
 #define USE_RX_SX127X