Make each mavlink message rate configured separately

Add parameters:
* MAV_RATE_ATT - ATTITUDE_QUATERNION rate.
* MAV_RATE_RC - RC_CHANNELS_RAW rate.
* MAV_RATE_MOT - ACTUATOR_CONTROL_TARGET rate.
* MAV_RATE_IMU - SCALED_IMU rate.

flix/mavlink.ino

@@ -10,8 +10,12 @@ extern float controlTime;
 extern float voltage;
 
 int mavlinkSysId = 1;
-Rate telemetryFast(10);
+
 Rate telemetrySlow(2);
+Rate telemetryAttitude(20);
+Rate telemetryRC(10);
+Rate telemetryMotors(10);
+Rate telemetryIMU(15);
 
 bool mavlinkConnected = false;
 String mavlinkPrintBuffer;
@@ -34,36 +38,46 @@ void sendMavlink() {
 			((mode == AUTO) ? MAV_MODE_FLAG_AUTO_ENABLED : MAV_MODE_FLAG_MANUAL_INPUT_ENABLED),
 			mode, MAV_STATE_STANDBY);
 		sendMessage(&msg);
+	}
 
-		if (!mavlinkConnected) return; // send only heartbeat until connected
+	if (!mavlinkConnected) return; // send only heartbeat until connected
 
+	if (telemetrySlow) {
 		mavlink_msg_extended_sys_state_pack(mavlinkSysId, MAV_COMP_ID_AUTOPILOT1, &msg,
 			MAV_VTOL_STATE_UNDEFINED, landed ? MAV_LANDED_STATE_ON_GROUND : MAV_LANDED_STATE_IN_AIR);
 		sendMessage(&msg);
+	}
 
+	if (telemetrySlow && valid(voltage)) {
 		uint16_t voltages[] = {(uint16_t)(voltage * 1000), UINT16_MAX, UINT16_MAX, UINT16_MAX, UINT16_MAX, UINT16_MAX, UINT16_MAX, UINT16_MAX, UINT16_MAX, UINT16_MAX};
 		uint16_t voltagesExt[] = {0, 0, 0, 0};
 		float remaining = constrain(mapf(voltage, 3.4, 4.2, 0, 1), 0, 1);
 		mavlink_msg_battery_status_pack(mavlinkSysId, MAV_COMP_ID_AUTOPILOT1, &msg, 0, MAV_BATTERY_FUNCTION_ALL,
 			MAV_BATTERY_TYPE_LIPO, INT16_MAX, voltages, -1, -1, -1, remaining * 100, 0, MAV_BATTERY_CHARGE_STATE_OK, voltagesExt, 0, 0);
-		if (valid(voltage)) sendMessage(&msg);
+		sendMessage(&msg);
 	}
 
-	if (telemetryFast && mavlinkConnected) {
+	if (telemetryAttitude) {
 		const float offset[] = {0, 0, 0, 0};
 		mavlink_msg_attitude_quaternion_pack(mavlinkSysId, MAV_COMP_ID_AUTOPILOT1, &msg,
 			time, attitude.w, attitude.x, -attitude.y, -attitude.z, rates.x, -rates.y, -rates.z, offset); // convert to frd
 		sendMessage(&msg);
+	}
 
+	if (telemetryRC && channels[0]) { // 0 means no RC input
 		mavlink_msg_rc_channels_raw_pack(mavlinkSysId, MAV_COMP_ID_AUTOPILOT1, &msg, controlTime * 1000, 0,
 			channels[0], channels[1], channels[2], channels[3], channels[4], channels[5], channels[6], channels[7], UINT8_MAX);
-		if (channels[0] != 0) sendMessage(&msg); // 0 means no RC input
+		sendMessage(&msg);
+	}
 
+	if (telemetryMotors) {
 		float controls[8];
 		memcpy(controls, motors, sizeof(motors));
 		mavlink_msg_actuator_control_target_pack(mavlinkSysId, MAV_COMP_ID_AUTOPILOT1, &msg, time, 0, controls);
 		sendMessage(&msg);
+	}
 
+	if (telemetryIMU) {
 		mavlink_msg_scaled_imu_pack(mavlinkSysId, MAV_COMP_ID_AUTOPILOT1, &msg, time,
 			acc.x / ONE_G * 1000, -acc.y / ONE_G * 1000, -acc.z / ONE_G * 1000, // convert to frd
 			gyro.x * 1000, -gyro.y * 1000, -gyro.z * 1000,

flix/parameters.ino

@@ -116,7 +116,10 @@ Parameter parameters[] = {
 	// mavlink
 	{"MAV_SYS_ID", &mavlinkSysId},
 	{"MAV_RATE_SLOW", &telemetrySlow.rate},
-	{"MAV_RATE_FAST", &telemetryFast.rate},
+	{"MAV_RATE_ATT", &telemetryAttitude.rate},
+	{"MAV_RATE_RC", &telemetryRC.rate},
+	{"MAV_RATE_MOT", &telemetryMotors.rate},
+	{"MAV_RATE_IMU", &telemetryIMU.rate},
 	// power
 	{"PWR_VOLT_PIN", &voltagePin, setupPower},
 	{"PWR_VOLT_SCALE", &voltageScale},

flix/util.h

@@ -65,6 +65,9 @@ public:
 	Rate(float rate) : rate(rate) {}
 
 	operator bool() {
+		if (t == last) {
+			return true; // the same step
+		}
 		if (t - last >= 1 / rate) {
 			last = t;
 			return true;