From 0608a7fcc4e7a6856ea57deeac430dfaae13fefd Mon Sep 17 00:00:00 2001
From: Daniel Agar <daniel@agar.ca>
Date: Thu, 24 Dec 2020 15:30:05 -0500
Subject: [PATCH] WIP: dsm bind default to DSMX 11 ms

---
 src/lib/rc/dsm.cpp | 21 +++++++++++++--------
 src/lib/rc/dsm.h   | 11 +++++++++++
 2 files changed, 24 insertions(+), 8 deletions(-)

diff --git a/src/lib/rc/dsm.cpp b/src/lib/rc/dsm.cpp
index a1d9a26601..dc3539c44f 100644
--- a/src/lib/rc/dsm.cpp
+++ b/src/lib/rc/dsm.cpp
@@ -384,17 +384,22 @@ void dsm_bind(uint16_t cmd, int pulses)
 		SPEKTRUM_RX_AS_GPIO_OUTPUT();
 		break;
 
-	case DSM_CMD_BIND_SEND_PULSES:
-		// Pulse RX pin a number of times
+	case DSM_CMD_BIND_SEND_PULSES: {
+			// Pulse RX pin a number of times
 #if defined(DSM_DEBUG)
-		printf("DSM: DSM_CMD_BIND_SEND_PULSES\n");
+			printf("DSM: DSM_CMD_BIND_SEND_PULSES\n");
 #endif
 
-		for (int i = 0; i < pulses; i++) {
-			dsm_udelay(120);
-			SPEKTRUM_OUT(false);
-			dsm_udelay(120);
-			SPEKTRUM_OUT(true);
+			auto flags = px4_enter_critical_section();
+
+			for (int i = 0; i < DSM_BIND_PULSE::INTERNAL_DSMX_11MS; i++) {
+				dsm_udelay(120);
+				SPEKTRUM_OUT(false);
+				dsm_udelay(120);
+				SPEKTRUM_OUT(true);
+			}
+
+			px4_leave_critical_section(flags);
 		}
 
 		break;
diff --git a/src/lib/rc/dsm.h b/src/lib/rc/dsm.h
index 874a760152..fd7154f366 100644
--- a/src/lib/rc/dsm.h
+++ b/src/lib/rc/dsm.h
@@ -63,6 +63,17 @@ typedef  struct dsm_decode_t {
 	dsm_buf_t buf;
 } dsm_decode_t;
 
+enum DSM_BIND_PULSE {
+	INTERNAL_DSM2_22MS = 3,
+	EXTERNAL_DSM2_22MS = 4,
+	INTERNAL_DSM2_11MS = 5,
+	EXTERNAL_DSM2_11MS = 6,
+	INTERNAL_DSMX_22MS = 7,
+	EXTERNAL_DSMX_22MS = 8,
+	INTERNAL_DSMX_11MS = 9,
+	EXTERNAL_DSMX_11MS = 10,
+};
+
 #pragma pack(pop)
 
 __EXPORT int	dsm_init(const char *device);