gomaomao/DIY-Multiprotocol-TX-Module
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SymaX impove rates in headless mode.

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This commit is contained in:
midelic 2017-11-14 12:15:08 +02:00
parent 5f7c598a34
commit f13701b120
2 changed files with 45 additions and 9 deletions
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25
Multiprotocol/Symax_nrf24l01.ino
View File

@ -30,6 +30,7 @@
#define SYMAX_FLAG_VIDEO 0x02
#define SYMAX_FLAG_PICTURE 0x04
#define SYMAX_FLAG_HEADLESS 0x08
#define SYMAX_XTRM_RATES 0x10
#define SYMAX_PAYLOADSIZE 10 // receive data pipes set to this size, but unused
#define SYMAX_MAX_PACKET_LENGTH 16 // X11,X12,X5C-1 10-byte, X5C 16-byte
@ -58,6 +59,7 @@ static void __attribute__((unused)) SYMAX_read_controls()
{
// Protocol is registered AETRF, that is
// Aileron is channel 1, Elevator - 2, Throttle - 3, Rudder - 4, Flip control - 5
// Extended (trim-added) Rates - 6, Photo - 7, Video - 8, Headless - 9
aileron = convert_channel_s8b(AILERON);
elevator = convert_channel_s8b(ELEVATOR);
throttle = convert_channel_8b(THROTTLE);
@ -67,6 +69,9 @@ static void __attribute__((unused)) SYMAX_read_controls()
// Channel 5
if (Servo_AUX1)
flags = SYMAX_FLAG_FLIP;
// Channel 6
if (Servo_AUX2)
flags |= SYMAX_XTRM_RATES;
// Channel 7
if (Servo_AUX3)
flags |= SYMAX_FLAG_PICTURE;
@ -76,6 +81,7 @@ static void __attribute__((unused)) SYMAX_read_controls()
// Channel 9
if (Servo_AUX5)
flags |= SYMAX_FLAG_HEADLESS;
flags &= ~SYMAX_XTRM_RATES; // Extended rates & headless incompatible
}
#define X5C_CHAN2TRIM(X) ((((X) & 0x80 ? 0xff - (X) : 0x80 + (X)) >> 2) + 0x20)
@ -98,9 +104,15 @@ static void __attribute__((unused)) SYMAX_build_packet_x5c(uint8_t bind)
packet[1] = rudder;
packet[2] = elevator ^ 0x80; // reversed from default
packet[3] = aileron;
packet[4] = X5C_CHAN2TRIM(rudder ^ 0x80);// drive trims for extra control range
if (flags & SYMAX_XTRM_RATES) { // drive trims for extra control range
packet[4] = X5C_CHAN2TRIM(rudder ^ 0x80);
packet[5] = X5C_CHAN2TRIM(elevator);
packet[6] = X5C_CHAN2TRIM(aileron ^ 0x80);
} else {
packet[4] = 0x00;
packet[5] = 0x00;
packet[6] = 0x00;
}
packet[7] = 0xae;
packet[8] = 0xa9;
packet[9] = 0x00;
@ -138,9 +150,14 @@ static void __attribute__((unused)) SYMAX_build_packet(uint8_t bind)
packet[2] = rudder;
packet[3] = aileron;
packet[4] = (flags & SYMAX_FLAG_VIDEO ? 0x80 : 0x00) | (flags & SYMAX_FLAG_PICTURE ? 0x40 : 0x00);
packet[5] = (elevator >> 2) | 0xc0; //always high rates (bit 7 is rate control)
packet[6] = (rudder >> 2) | (flags & SYMAX_FLAG_FLIP ? 0x40 : 0x00);
packet[7] = (aileron >> 2) | (flags & SYMAX_FLAG_HEADLESS ? 0x80 : 0x00);
packet[5] = 0xc0; //always high rates (bit 7 is rate control)
packet[6] = flags & SYMAX_FLAG_FLIP ? 0x40 : 0x00;
packet[7] = flags & SYMAX_FLAG_HEADLESS ? 0x80 : 0x00;
if (flags & SYMAX_XTRM_RATES) { // use trims to extend controls
packet[5] |= elevator >> 2;
packet[6] |= rudder >> 2;
packet[7] |= aileron >> 2;
}
packet[8] = 0x00;
}
packet[9] = SYMAX_checksum(packet);

25
docs/Models.md
View File

@ -7,9 +7,9 @@ The Deviation project (on which this project was based) have a useful list of mo
<img src="http://img2.cheapdrone.co.uk/images/upload/2014/12/X5C%203/SKU115108-7.jpg" Width="200" Height="200" />
## Channel Map
CH1|CH2|CH3|CH4|CH5|CH6|CH7|CH8
---|---|---|---|---|---|---|---
A|E|T|R|FLIP|RATES|PICTURE|VIDEO
CH1|CH2|CH3|CH4|CH5|CH6|CH7|CH8|CH9
---|---|---|---|---|---|---|---|---
A|E|T|R|FLIP|RATES|PICTURE|VIDEO|HEADLESS
## Binding
There are no special binding instructions. The model powers up in Autobind mode and expects the bind sequence from the transmitter within the first 4-5 seconds.
@ -45,6 +45,25 @@ One of the most annoying functions on the Syma X5C is that the motors stop when
1. When you want to fly in "idle-up" mode flick the switch and your stabilization will always be active.
1. Remeber to switch off idle-up as soon as the quad lands (or crashes - to avoid damage to the motors)
### Additional notes on rates:
The SymaX driver can add full trim to the control output. Doing so enables
dramatic rates, steep angles, and high speeds. If CH6 is low, the usual Syma
full rates will be in effect. If CH6 is high, the SymaX extreme trim rates will be
in effect. Be cautious when first trying out the extreme rates.
The extreme rates do not work with with headless mode because in this
mode the trim and the primary control directions may not be aligned - the
primary control directions will be based on the headless mode, but the trims
remain based upon the quadcopter's heading. So extreme rates are disabled
when headless mode is selected.
Be aware that the use of extreme rates and the resulting steep angles will
disorient the gyro responsible for maintaining headless mode, and that the
direction the quadcopter thinks you selected for headless mode may not be
correct after especially wild flights.
# Inductrix (Horizon Hobby)
<img src="https://s7d5.scene7.com/is/image/horizonhobby/BLH8700_a0" Width="200" Height="200" />