Search found 40 matches

by djrm
Thu Dec 06, 2012 10:36 pm
Forum: Boards
Topic: Naze32 hardware discussion thread
Replies: 3249
Views: 676004

Re: Naze32 hardware discussion thread

Trying to get telemetry set up on the Naze32 FC with the free adapter. I feel like I've spent lots of time so far modding my 9x and just want this "last" part to be a little easier. I have a modded 9x running Open9x with a DIY DHT module modded for telemetry. I'm using a D8R-II Plus RX wi...
by djrm
Fri Nov 16, 2012 12:43 am
Forum: ESCs, propellers , servos and radios
Topic: SERIAL_SUM_PPM channel order not working
Replies: 43
Views: 6635

Re: SERIAL_SUM_PPM channel order not working

I fixed a similar problem to yours by altering the mixes using the er9x configuration menus. in multiwii conf: #define SERIAL_SUM_PPM ROLL,PITCH,THROTTLE,YAW,AUX1,AUX2,AUX3,AUX4 in er9x menus:# (for mode2 tx): ch01 +100%AIL ch02 +100%ELE ch03 +100%THR ch04 +100%RUD ch05 +100%FULL Switch(ELE) ch06 +1...
by djrm
Tue Nov 06, 2012 11:57 pm
Forum: Software
Topic: Baseflight aka multiwii port to stm32
Replies: 1036
Views: 2309568

Re: Baseflight aka multiwii port to stm32

I have found a bug in the telemetry GPS function, both AP messages were sending copies of the BP message giving inacurate GPS locations in the received data. The corrected function is here: static void sendGPS(void) { sendDataHead(ID_LATITUDE_BP); serialize16(abs(GPS_coord[LAT]) / 100000); sendDataH...
by djrm
Fri Nov 02, 2012 10:51 pm
Forum: Boards
Topic: Naze32 hardware discussion thread
Replies: 3249
Views: 676004

Re: Naze32 hardware discussion thread

Greetings stanleyy, I'm sorry I have no idea what could be wrong with your board or project, does it work with the stock pre-compiled hex baseflight file? My real reason for my message is to ask if you would please share your IAR project files, I've been meaning to make on myself for a while but hav...
by djrm
Thu Nov 01, 2012 8:10 pm
Forum: Ideas
Topic: Direct Frsky telemtry data from MW FC
Replies: 359
Views: 1029859

Re: Direct Frsky telemtry data from MW FC

Here is a simple way to use both a Bluetooth transmitter and Er9x transmitter LCD together using an RS232 Bluetooth adapter, the adapter has pins for the ttl level and the inverted RS232 level serial signals, so combining both a level translator for the RC and the Bluetooth transmitter, they both se...
by djrm
Mon Aug 27, 2012 8:23 pm
Forum: MultiWii tweaking - flying experience
Topic: 2.0 ALT PID Tuning
Replies: 19
Views: 16692

Re: 2.0 ALT PID Tuning

Hello Kraut Bob, I forgot to mention that I'm using a BMP085 and HMC5883 breakout boards on a Crius lite FC together with iic GPS all on a 600mm frame with 2836 880kv motors and 30Amp Lulin ESCs all powered by a 3600mAh 50C battery. I'm struggling with tuning the system, it seems I have a vibration ...
by djrm
Mon Aug 27, 2012 5:47 pm
Forum: Getting Started - MultiWii config and setup
Topic: Motor Speed Problem!!!
Replies: 11
Views: 1433

Re: Motor Speed Problem!!!

Greetings,
Looking at your screen shots I see that in both the motor values for front and rear are identical. Are you sure the software is properly configured for your copter. I'd suggest that a re-compile and eeprom clear could be needed but I have no idea why.
hth David.
by djrm
Sat Aug 25, 2012 9:15 pm
Forum: MultiWii tweaking - flying experience
Topic: 2.0 ALT PID Tuning
Replies: 19
Views: 16692

Re: 2.0 ALT PID Tuning

Greetings I applied your changes to my 2.1 multiwii and can see a noticeable improvement in the alt hold, Thank you. This mod is helping me learn to fly my quadcopter, its still early days for me with a usable system. At present I'm using the new default alt PIDs and am about to try tuning them as s...
by djrm
Thu May 31, 2012 11:38 pm
Forum: Ideas
Topic: 32 bit Arm STM32 port
Replies: 23
Views: 4706

Re: 32 bit Arm STM32 port

For development work I am using the free toolchain CooCox IDE and its low cost JTAG board from here: http://www.coocox.org/Index.html
by djrm
Sat May 26, 2012 10:40 am
Forum: Ideas
Topic: 32 bit Arm STM32 port
Replies: 23
Views: 4706

Re: 32 bit Arm STM32 port

Unfortunateley I was just about ready to fit it to my frame for testing when I placed it down on my desk and shorted something and it started to smoke. it is completely fried I think the 3v3 shorted to the 12V. Some of the chips went with quite a fuss as it was connected to a lipo at the time. I hav...
by djrm
Mon May 21, 2012 11:19 pm
Forum: Software development
Topic: GPS on Crius SE board
Replies: 121
Views: 40581

Re: GPS on Crius SE board

The signal pins show an average reading of approx 4.5V DC, the actual voltage here will depend on the data. I'm sure you know that the FTDI and TTL connectors are one and the same i/o ports, they are just two for convenience. i.e The Tx, Rx, 5V, and Gnd are common to both connectors. If there is no ...
by djrm
Mon May 21, 2012 9:36 pm
Forum: Software development
Topic: Rushduino OSD - Multiwii based open software osd
Replies: 782
Views: 90544

Re: Rushduino OSD - Multiwii based open software osd

Regarding the video display problem.
It looks like the video signal is overloading the OSD somehow, perhaps you shouold attenuate the input a little. Does the OSD board have/need a termination resistor, if it were missing this could cause a signal overload.
hth David.
by djrm
Mon May 21, 2012 9:19 pm
Forum: Software development
Topic: GPS on Crius SE board
Replies: 121
Views: 40581

Re: GPS on Crius SE board

Jonit wrote:Hi dramida, i tried to measure the voltage between GND and VCC on my Crius board, but it shows 0V ..

There is something wrong here, on my board there is 5V on the VCC terminal. I am using it to supply power to my OSD board.
hth David.
by djrm
Wed May 16, 2012 10:54 pm
Forum: Software development
Topic: GPS integration
Replies: 1724
Views: 454300

Re: GPS integration

I have been following this most interesting development, thank you eosbandi. I have installed the latest (r24) software onto my 8MHz pro mini 328 satnav board. it appears to be working well although I cannot attempt to fly it just yet. I found a small problem with the led blinking, it would always b...
by djrm
Sun May 13, 2012 6:17 pm
Forum: Ideas
Topic: 32 bit Arm STM32 port
Replies: 23
Views: 4706

Re: 32 bit Arm STM32 port

I opened my bluetooth GPS and had a poke around inside and found some test pads one of which had NMEA sentences at 9600 baud so I soldered some wires on and fed them into the FC board and now the gui shows me my location. I had to switch over to PPM so this was a chance to test my RC receiver and al...
by djrm
Sun May 13, 2012 1:02 am
Forum: Ideas
Topic: 32 bit Arm STM32 port
Replies: 23
Views: 4706

Re: 32 bit Arm STM32 port

Thanks for the info about the baro reading, I had not studied the code. However I see I have a conversion complete pin connected on my board and I just need to reassign it. It turns out that the error in altitude was due to the high pressure at present, this coupled with my home altitude of only abo...
by djrm
Sat May 12, 2012 7:53 am
Forum: Ideas
Topic: 32 bit Arm STM32 port
Replies: 23
Views: 4706

Re: 32 bit Arm STM32 port

Hello dongs, The demo application supplied with the board is not very inspiring, but here it is anyway: http://dl.dropbox.com/u/2678548/Arm/STM32_IMU_main.c If you know how to decode the chinese comments please let me know. Last night I tried the latest MWC windows gui with the STM port and was plea...
by djrm
Thu May 10, 2012 9:21 pm
Forum: Ideas
Topic: 32 bit Arm STM32 port
Replies: 23
Views: 4706

Re: 32 bit Arm STM32 port

Hello, Thanks dongs for the info and useful reminder to keep the sources under the gpl. The reason Ive used the Coocox IDE and gcc is to keep the project free rather than use one of the commercial compilers. I was also attracted to the CoLink jtag adaptor also because of its low cost as well as beca...
by djrm
Wed May 09, 2012 11:13 pm
Forum: Software development
Topic: mobiDrone nano arduino OSD for MultiWii with PID config
Replies: 295
Views: 60244

Re: mobiDrone nano arduino OSD for MultiWii with PID config

Greetings Michal, the display preview looks good. I have added a 50 Amp current sensor to my OSD board. The settings were changed as follows: // ACS758LCB-050U-PFF-T 50 Amp unidirectional, 60 mV per Amp sensitivity, 600 mV offset volatile uint16_t offset = 123; //default value 0.6V for single sensor...
by djrm
Tue May 08, 2012 10:28 pm
Forum: Ideas
Topic: 32 bit Arm STM32 port
Replies: 23
Views: 4706

32 bit Arm STM32 port

I am interested in the porting MW onto a 32 bit architecture and see this has already been done successfully here by dongs on his own board. With this in mind I have bought from ebay a STM32 board complete with 10 DOF sensos, see here: http://www.ebay.co.uk/itm/180847108943?ssPageName=STRK:MEWNX:IT&...
by djrm
Thu May 03, 2012 6:17 pm
Forum: Ideas
Topic: I2C GPS, init Home position
Replies: 2
Views: 972

Re: I2C GPS, init Home position

Although automatically setting the GPS home position may have some advantages I think it would be wrong to set the GPS home position at every motor arming for a number of reasons. The GPS could have a poor fix especially after having just been switched on, the copter may have landed and been disarme...
by djrm
Tue May 01, 2012 8:52 pm
Forum: ESCs, propellers , servos and radios
Topic: Failsafe methods
Replies: 16
Views: 2677

Re: Failsafe methods

The receiver LED voltage has been fed into the MWC A3 analog input, this is an unused input on my Crius lite FC board. The voltage is being tested as part of the failsafe software. The result is that failsafe now kicks in when the receiver gos off (or out of range). I have called the new analogue in...
by djrm
Mon Apr 30, 2012 11:20 pm
Forum: ESCs, propellers , servos and radios
Topic: Failsafe methods
Replies: 16
Views: 2677

Re: Failsafe methods

I've opened the receiver, there are two LEDs which light when the signal is good. I'll diode OR them together and feed their output to the spare pin on the 3 pin DC power connector I would then have to modify the MWC software to use this signal to trigger failsafe operation mode. I'm thinking that p...
by djrm
Sun Apr 29, 2012 10:39 pm
Forum: ESCs, propellers , servos and radios
Topic: Failsafe methods
Replies: 16
Views: 2677

Failsafe methods

Today I decided to check the failsafe operation of my copter and I found it does not work at all. What I did find is that when the receiver has once seen the transmiter signal then it continues to output the same outputs until it receives an update, i.e. if I switch off the transmiter then the recei...
by djrm
Fri Apr 27, 2012 5:18 pm
Forum: ESCs, propellers , servos and radios
Topic: ESC calibration
Replies: 51
Views: 12878

Re: ESC calibration

Greetings Hamburger, your idea is good. There is also another patch version of auto ESC cal software with some more checking for protection here: m This one is only ever activated at power up if the throttle is set to full on. I am looking at these ideas to use in conjuntion with an ESC programming ...
by djrm
Wed Apr 18, 2012 10:36 pm
Forum: ESCs, propellers , servos and radios
Topic: ESC calibration
Replies: 51
Views: 12878

Re: ESC calibration

Hello Federico, My understanding of the software is that it connects all four ESCs to your transmitter (via the ESC ports on the FC) at the same time. This would be a manual process of calibrating the ESCS like you could do if the ESCs were connected diretley to the receiver. I have not tried it but...
by djrm
Mon Apr 16, 2012 10:31 pm
Forum: Software development
Topic: GPS LCD display error with negative coordinates
Replies: 2
Views: 481

GPS LCD display error with negative coordinates

I live to the west of Grenwich, the LCD display of my GPS location was corrupted because the LCD display function could not cope with the negative longitude. While fixing it I took the opportunity to include the satellite count too. The new LCD display has the hemisphere N or S, E or W on the top li...
by djrm
Sun Apr 15, 2012 10:35 pm
Forum: ESCs, propellers , servos and radios
Topic: ESC calibration
Replies: 51
Views: 12878

Re: ESC calibration

And here's another one: m looks like download link hell. do you have a file we can easily download? not trying to install spyware. I have looked at the software from the link above, it contains a version of Multiwii V1.8 with a change to the initOutput function in Output.pde The change alters this ...
by djrm
Wed Apr 11, 2012 10:46 pm
Forum: Software development
Topic: VBAT incorrect value
Replies: 19
Views: 4029

Re: VBAT incorrect value

I think you will find that the 5v power supply to the processor is used as reference voltage for the ADC conversion, if you supply the FC with anything other than exactly 5 volts then the ADC measurement will be inaccurate by a proportional amount. So check the supply voltage. hth David.
by djrm
Wed Apr 11, 2012 9:36 pm
Forum: Getting Started - MultiWii config and setup
Topic: Uneven Throttle Signal; Help!
Replies: 7
Views: 1730

Re: Uneven Throttle Signal; Help!

Hello I'm no expert, I've only flown my copter a few times and I havent really got the hang of it yet. The PID settings are all 0 in the picture, did you read before taking scrrenshot? Try holding the copter when armed with some throttle to see where it wants to balance. Be careful, wear gloves. Exp...
by djrm
Mon Apr 09, 2012 5:30 pm
Forum: Connecting elements
Topic: Buzzer question
Replies: 9
Views: 4134

Re: Buzzer question

Hello,
To me it looks like the buzzer needs to be fed with a frequency signal, not DC. if this is so then it will not work.
Useful looking little board but not for feeding from the buzzer output without software modification.
hth David.
by djrm
Thu Mar 29, 2012 8:33 pm
Forum: Software development
Topic: GPS integration
Replies: 1724
Views: 454300

Re: GPS integration

Hello Fritz, I think the root cause of the problem could be related to the fact that my Arduino mini is only runing at 8 MHz, although it works fine using the wire library at 400KHz I2C. The problem is causing the cycle time to increase which is why I'm looking for an alternative solution. Cheers Da...
by djrm
Thu Mar 29, 2012 8:06 pm
Forum: Software development
Topic: GPS integration
Replies: 1724
Views: 454300

Re: GPS integration

Hello Fritz, I had plenty of difficulty getting the code to work. I had to use this test harness to check the operation of the Arduino mini I2C program before I could get the Multiwii to work. The problem is somewhere in the I2C master functions in the multiwii software. My kludge solution is to add...
by djrm
Thu Mar 29, 2012 6:21 pm
Forum: Software development
Topic: GPS integration
Replies: 1724
Views: 454300

Re: GPS integration

The results of a bit of soldering here, Home made I2C GPS board with magnetometer sensor. I'm still waiting for the Baro chip to arrive to complete the board. http://dl.dropbox.com/u/2678548/Arduino/P1080250.jpg Integrated with Multiwii V2.0 on Crius lite board, yet to be tried in flight but working...
by djrm
Fri Mar 23, 2012 5:36 pm
Forum: Software development
Topic: GPS integration
Replies: 1724
Views: 454300

Re: GPS integration

Greetings, I'm in the process of building an I2C GPS receiver for my Multiwii. During testing I've found what I believe may be a bug in the GPS_fix_home setting section towards the end of the GPS_NewData function. At around line 61 of the pre4 version of the GPS module this line of code "if (rc...
by djrm
Mon Mar 12, 2012 7:09 pm
Forum: Ideas
Topic: LCD Conf with acc Trim
Replies: 4
Views: 916

Re: LCD Conf with acc Trim

Hello Hamburger, My reason for adding the values into the editor display was so I could see the values and record them for later if I wanted to restore after software upgrade or something. I was having difficulty with the joystick commands, I dont think the calibrate acc joystick commnad works at al...
by djrm
Sat Mar 10, 2012 9:37 am
Forum: Ideas
Topic: LCD Conf with acc Trim
Replies: 4
Views: 916

LCD Conf with acc Trim

Greetings, I'm a total noob at flying and am trying to get my xcopter trimmed properley, to help doing this I've altered the LCD Configuration software to show and edit the values of accelerometer trim. The problem I had was that I did not know what the current values were, with the LCD editor I can...
by djrm
Thu Feb 16, 2012 8:43 pm
Forum: Software development
Topic: Multiwii port to STM32 and place to ask stupid questions
Replies: 38
Views: 14368

Re: Multiwii port to STM32 and place to ask stupid questions

Thanks for posing the source. I've tried building it but the code size just exceeds the limit for the free version of Keil.
Perhaps I can trim it down or port it to IAR for which I have a full license.
Best regards, David.
by djrm
Wed Feb 15, 2012 11:49 pm
Forum: Software development
Topic: Multiwii port to STM32 and place to ask stupid questions
Replies: 38
Views: 14368

Re: Multiwii port to STM32 and place to ask stupid questions

Hello dongs, This is my first post on the forum. I'm starting to build a multicopter for the first time, I'm already looking for an upgrade to a multiwii clone I have yet to receive! the stm32 arm looks like a good choice, and the board you bought looks like a suitable inexpensive platform to build ...