RoboSavvy Forum

I2C bus on RBC (ATMEGA128) for many sensor

2010-09-03T15:11:14+01:00

Well, Working now with HMC5843 and an adaptator 3.3 to 5 Volts and modifications in accelerometer.c

Modif in accelerometer.c

Code:: //==============================================================// // Delay_I2C //==============================================================// void Delay_I2C(void) { NOP; NOP; NOP; NOP; NOP; NOP; }

and I remplaced all double NOP; by Delay_I2C(); in primitives I2C functions.

So now I'm sure we have one problem with timing in I2C functions

And in I2C_AckRead() We do not read the Acknowledge.
We are waiting for assuming it has been sent

To be continuous...

Statistics: Posted by Flid — Fri Sep 03, 2010 3:11 pm

I2C bus on RBC (ATMEGA128) for many sensor

2010-08-23T18:42:16+01:00

@i-Bot: Can you send me the wiring and souce code (for robobuilder, the part where you acces to the camera) of your hack with the wiimote camera, pleeeease

Statistics: Posted by Flid — Mon Aug 23, 2010 6:42 pm

I2C bus on RBC (ATMEGA128) for many sensor

2010-08-19T11:20:52+01:00

Crazy, I will be

I put one HMC5843
(this one...)

But this time NO ANSWER from HMC5843

I performed like the HMC5843 Datasheet:
Init:
-write to the HMC5843 (0x3C), Mode register, 0x00

Read
-write to the HMC5843, Register 3
-read byte from HMC5843 (0x3D)
-nothing

@Everybody: Any ideas ?

@i-Bot: Can you send me the wiring and souce code (for robobuilder, the part where you acces to the camera) of your hack with the wiimote camera, pleeeease

Statistics: Posted by Flid — Thu Aug 19, 2010 11:20 am

I2C bus on RBC (ATMEGA128) for many sensor

2010-08-17T10:29:59+01:00

might be easier to get a different compass chip - robosavvy sell one that works from 2.7-5.2v

http://robosavvy.com/store/product_info ... cts_id/394

Statistics: Posted by l3v3rz — Tue Aug 17, 2010 10:29 am

I2C bus on RBC (ATMEGA128) for many sensor

2010-08-17T08:12:58+01:00

I think I found the problem

I'm an idiot the ACC run under 3.3 volts and the CMPS03 run under 5 volts

So or I must use one Level-Converter like this one... Or I must use one compass under 3.3 V

See this : http://www.nxp.com/documents/applicatio ... N10441.pdf

Thanks l3v3rz for listening my problems

I will be back in this topic when my problem will be solve

Statistics: Posted by Flid — Tue Aug 17, 2010 8:12 am

I2C bus on RBC (ATMEGA128) for many sensor

2010-08-16T14:17:05+01:00

You need to work out why Basic.hex is seeing ERR and OK from your PC.

If serial comms isn't working - then robobuilderlib won't be working. Theres no error protocol so it could just be giberish you're seeing.

I don't believe there is any problem with basic.hex - it would be good to hear if someone else has downloaded and can confirm that of course, as it all works fine on my PC/Robot.

You could try a different robobuilder function such simply reading the position of servo. ie. wck.wckReadPos(13) this should return true, then read value wck.respnse[1] for the position

cheers

Statistics: Posted by l3v3rz — Mon Aug 16, 2010 2:17 pm

I2C bus on RBC (ATMEGA128) for many sensor

2010-08-16T13:49:41+01:00

l3v3rz wrote:
I can't see any thing wrong with it. Can you try starting at register 0 and read 4 bytes and see if you get the firmware version ?

so something like:

Code:
wckMotion wmt = new wckMotion("COM5", true); wmt.I2C_write(0xC0, new byte[] {0}); byte[] ib = wmt.I2C_read (0xC1, new byte[] {}, 4); Console.WriteLine("ver={0}, bear={1}",ib[0], ib[1]));

Same Answer 130;4

l3v3rz wrote:
1. my code in DCMP - although it works with Accelerometer, may be timing is off for compass.

2. hardware connection on compass to RBC ? Have you scope it up and seen any data transfer? I assume you've checked its in I2C mode and not PWM mode.

3. robobuilderlib not correctly sending data to DCMP - you could try loading BASIC and running that at least then you're cutting out the PC and the robobuilderlib out of equation

1) Sure but where ?
2) In I2C sure, Ok, something append (see with led, I don't have scope here, maybe next week, when I will be back at my work)
3) I can't run basic.hex

Statistics: Posted by Flid — Mon Aug 16, 2010 1:49 pm

I2C bus on RBC (ATMEGA128) for many sensor

2010-08-15T19:53:08+01:00

I can't see any thing wrong with it. Can you try starting at register 0 and read 4 bytes and see if you get the firmware version ?

so something like:

Code:: wckMotion wmt = new wckMotion("COM5", true); wmt.I2C_write(0xC0, new byte[] {0}); byte[] ib = wmt.I2C_read (0xC1, new byte[] {}, 4); Console.WriteLine("ver={0}, bear={1}",ib[0], ib[1]));

Otherwise it can really be one of following:
1. my code in DCMP - although it works with Accelerometer, may be timing is off for compass.

2. hardware connection on compass to RBC ? Have you scope it up and seen any data transfer? I assume you've checked its in I2C mode and not PWM mode.

3. robobuilderlib not correctly sending data to DCMP - you could try loading BASIC and running that at least then you're cutting out the PC and the robobuilderlib out of equation

Without the hardware its hard to help, but if you do find any problems with the code do let me know so I can update the library.

good luck

Statistics: Posted by l3v3rz — Sun Aug 15, 2010 7:53 pm

I2C bus on RBC (ATMEGA128) for many sensor

2010-08-15T16:58:50+01:00

l3v3rz wrote:
Ok great - official release out real soon now

Its also built into the BASIC as well so for doing rapid prototypes could be a good alternative. when you get your compass code working hope you can post and I'll add to the library

cheers

Bad News

Don't work with the Devantech CMP03 compass module

I use same routine of ACC who working (vb.net)

For ACC

Code:: Dim OutBuff(0) As Byte OutBuff(0) = &H2 wmt.I2C_write(&H70, OutBuff) Dim InBuff(-1) As Byte ReDim OutBuff(-1) InBuff = wmt.I2C_read(&H71, OutBuff, 6) Me.Text = "x:" + InBuff(1).ToString + " y:" + InBuff(3).ToString + " z:" + InBuff(5).ToString

And for CMP03 compass

Code:: Dim Add_CMP03 As Byte = &HC0 Dim OutBuff(0) As Byte OutBuff(0) = &H1 '''register 1 = Compass Bearing as a byte, i.e. 0-255 for a full circle wmt.I2C_write(Add_CMP03, OutBuff) Dim InBuff(-1) As Byte ReDim OutBuff(-1) InBuff = wmt.I2C_read(Add_CMP03 + 1, OutBuff, 1) 'read answer in one byte

And the answer in the buffer is always 130

I tryed with bigger buffer (10) to see the result and I have:
130;4;8;16;32;64;128;0;0;0

I tryed too, with other register like 2 and 3, and same result

Any suggests ? Where I'm wrong

Statistics: Posted by Flid — Sun Aug 15, 2010 4:58 pm

I2C bus on RBC (ATMEGA128) for many sensor

2010-08-14T18:18:10+01:00

Ok great - official release out real soon now

Its also built into the BASIC as well so for doing rapid prototypes could be a good alternative. when you get your compass code working hope you can post and I'll add to the library

cheers

Statistics: Posted by l3v3rz — Sat Aug 14, 2010 6:18 pm

I2C bus on RBC (ATMEGA128) for many sensor

2010-08-14T11:49:28+01:00

Hi l3v3rz,

I rebuild DCMP and RobobuilderLib to test the I2C and working well with ACC Sensors This afternoon, I will make the hard modifications on Humo to include the compass. So, see you later

Here rebuild: DCMP_RobobuilderLib_with_I2C_beta_from_Flid.zip

Thank you again at l3v3rz for your work

Statistics: Posted by Flid — Sat Aug 14, 2010 11:49 am

I2C bus on RBC (ATMEGA128) for many sensor

2010-08-04T19:47:10+01:00

Flid wrote:
l3v3rz wrote:Have you interfaced any I2C sensors yet ? if so which ones and how about some pictures to show what you're up to.
l3v3rz

In fact, not yet

Not yet received my Devantech CMP03 compass module

Be patient, I will be

Flid

Devantech CMP03 compass module received

Try under .net with my PC and USB-I2C and working well ( done one little software to read I2C components )

I know the .net dev platform but not really ATMEGA128 and AVR compilation with C ( question will coming later )

So l3v3rz, I need your wrapper with DCMP and RobobuilderLib

Take your time , I go in holidays for 1 week
I hope you will make the release when I be back

See You

Statistics: Posted by Flid — Wed Aug 04, 2010 7:47 pm

I2C bus on RBC (ATMEGA128) for many sensor

2010-08-01T19:37:40+01:00

i-Bot wrote:
I put connectors where the accelerometer was and connected a remote board with accelerometer and I2C camera from wiimote. This works fine.

Amazing, I'm looking on internet about Wiimote IR camera, on Google, and i'm impresive by the possibility of this cheaper caméra.

Many libraries about this camera with this hack under .net

this add-on will be implemented on my robot.

Amazing , I'm looking on internet about Wiimote IR camera, on Google, and i'm impresive by the possibility of this not cheaper caméra.

Many libraries about this camera with this hack under .net

this add-on will be implemented on my robot.

Other, but interresting too
I will put too one 2.4Ghz vidéo camera, with OpenCV (in fact Emgu libraries in .NET ) for vision of the true world.

So I'm very impatient to see the release of DCMP and RobobuilderLib from l3v3rz

See You

Statistics: Posted by Flid — Sun Aug 01, 2010 7:37 pm

I2C bus on RBC (ATMEGA128) for many sensor

2010-07-31T17:57:14+01:00

l3v3rz wrote:
Have you interfaced any I2C sensors yet ? if so which ones and how about some pictures to show what you're up to.
l3v3rz

In fact, not yet

Not yet received my Devantech CMP03 compass module

Be patient, I will be

Flid

Statistics: Posted by Flid — Sat Jul 31, 2010 5:57 pm

I2C bus on RBC (ATMEGA128) for many sensor

2010-07-31T15:12:03+01:00

Please have patience - I do only work on this in my spare time.

I haven't made available as a pre-built release yet, although the source is uploaded if you want to build it yourself. I'm working on a few other items before I create a new release as it requires updates to both robobuilderlib and dcmp.hex.

Have you interfaced any I2C sensors yet ? if so which ones and how about some pictures to show what you're up to.

l3v3rz

Statistics: Posted by l3v3rz — Sat Jul 31, 2010 3:12 pm