diff --git a/communication/message/flexray/control/flexraycontrolmessage.cpp b/communication/message/flexray/control/flexraycontrolmessage.cpp
index 934fce4..5da67da 100644
--- a/communication/message/flexray/control/flexraycontrolmessage.cpp
+++ b/communication/message/flexray/control/flexraycontrolmessage.cpp
@@ -38,6 +38,18 @@ std::vector<uint8_t> FlexRayControlMessage::BuildWriteCCRegArgs(uint8_t controll
 	});
 }
 
+std::vector<uint8_t> FlexRayControlMessage::BuildAddConfiguredTxMessageArgs(
+	uint8_t controller, uint16_t descriptionId, uint16_t slotId, uint8_t baseCycle, uint8_t cycleReps, FlexRay::Channel channel) {
+	return BuildBaseControlArgs(controller, FlexRay::Opcode::AddConfiguredTxMessage, {
+		uint8_t(descriptionId),
+		uint8_t(descriptionId >> 8),
+		uint8_t(slotId),
+		uint8_t(slotId >> 8),
+		uint8_t(baseCycle + cycleReps),
+		uint8_t(channel)
+	});
+}
+
 FlexRayControlMessage::FlexRayControlMessage(const Packet& packet) : Message() {
 	if(packet.data.size() < 2)
 		return; // huh?
diff --git a/communication/packet/flexraypacket.cpp b/communication/packet/flexraypacket.cpp
index 6c6146d..e24e35a 100644
--- a/communication/packet/flexraypacket.cpp
+++ b/communication/packet/flexraypacket.cpp
@@ -21,7 +21,7 @@ std::shared_ptr<FlexRayMessage> HardwareFlexRayPacket::DecodeToMessage(const std
 		// Eventually we'll have to get this from the framelen
 	} else {
 		msg->tsslen = data->tss_length_12_5ns * 12.5e-9;
-		msg->channelB = data->statusBits.bits.chb;
+		msg->channel = data->statusBits.bits.chb ? icsneo::FlexRay::Channel::B : icsneo::FlexRay::Channel::A;
 		
 		if(data->statusBits.bits.bytesRxed >= 5) {
 			if(data->statusBits.bits.hcrc_error)
diff --git a/include/icsneo/communication/message/flexray/control/flexraycontrolmessage.h b/include/icsneo/communication/message/flexray/control/flexraycontrolmessage.h
index 2a427fa..39f6594 100644
--- a/include/icsneo/communication/message/flexray/control/flexraycontrolmessage.h
+++ b/include/icsneo/communication/message/flexray/control/flexraycontrolmessage.h
@@ -5,6 +5,7 @@
 #include "icsneo/communication/packet.h"
 #include "icsneo/device/extensions/flexray/opcode.h"
 #include "icsneo/device/extensions/flexray/pocstatus.h"
+#include "icsneo/device/extensions/flexray/channel.h"
 
 namespace icsneo {
 
@@ -14,6 +15,8 @@ public:
 	static std::vector<uint8_t> BuildBaseControlArgs(uint8_t controller, FlexRay::Opcode op, std::initializer_list<uint8_t> args);
 	static std::vector<uint8_t> BuildReadCCRegsArgs(uint8_t controller, uint16_t startAddress, uint8_t numRegisters = 1);
 	static std::vector<uint8_t> BuildWriteCCRegArgs(uint8_t controller, uint16_t address, uint32_t value);
+	static std::vector<uint8_t> BuildAddConfiguredTxMessageArgs(
+		uint8_t controller, uint16_t descriptionId, uint16_t slotId, uint8_t baseCycle, uint8_t cycleReps, FlexRay::Channel channel);
 
 	FlexRayControlMessage(const Packet& packet);
 	virtual ~FlexRayControlMessage() = default;
diff --git a/include/icsneo/communication/message/flexray/flexraymessage.h b/include/icsneo/communication/message/flexray/flexraymessage.h
index d43bc27..499b1d2 100644
--- a/include/icsneo/communication/message/flexray/flexraymessage.h
+++ b/include/icsneo/communication/message/flexray/flexraymessage.h
@@ -4,6 +4,7 @@
 #include "icsneo/communication/message/message.h"
 #include "icsneo/device/extensions/flexray/symbol.h"
 #include "icsneo/device/extensions/flexray/crcstatus.h"
+#include "icsneo/device/extensions/flexray/channel.h"
 
 namespace icsneo {
 
@@ -17,7 +18,7 @@ public:
 	uint16_t headerCRC = 0;
 	FlexRay::CRCStatus crcStatus = FlexRay::CRCStatus::OK;
 	uint32_t frameCRC = 0;
-	bool channelB = false;
+	FlexRay::Channel channel = FlexRay::Channel::None;
 	bool nullFrame = false;
 	bool reserved0was1 = false;
 	bool payloadPreamble = false;
diff --git a/include/icsneo/device/extensions/flexray/channel.h b/include/icsneo/device/extensions/flexray/channel.h
new file mode 100644
index 0000000..b554ab5
--- /dev/null
+++ b/include/icsneo/device/extensions/flexray/channel.h
@@ -0,0 +1,22 @@
+#ifndef __FLEXRAYCHANNEL_H_
+#define __FLEXRAYCHANNEL_H_
+
+#include <cstdint>
+
+namespace icsneo {
+
+namespace FlexRay {
+
+// In some cases used as a bitfield
+enum class Channel {
+	None = 0, // Usually an invalid/unset value
+	A = 1,
+	B = 2,
+	AB = 3
+};
+
+} // namespace FlexRay
+
+} // namespace icsneo
+
+#endif // __FLEXRAYCHANNEL_H_
\ No newline at end of file
diff --git a/include/icsneo/device/extensions/flexray/opcode.h b/include/icsneo/device/extensions/flexray/opcode.h
index af24896..d2c5e42 100644
--- a/include/icsneo/device/extensions/flexray/opcode.h
+++ b/include/icsneo/device/extensions/flexray/opcode.h
@@ -14,7 +14,7 @@ enum class Opcode : uint8_t {
 	WriteCCReg = 0x02,
 	WriteMessageBuffer = 0x03,
 	ReadCCStatus = 0x04,
-	AddConfiguredMessage = 0x05,
+	AddConfiguredTxMessage = 0x05,
 	InitForRun = 0x06,
 	Unknown = 0xff
 };