OpenMV

kwagyeman

The store automatically calculates shipping costs. The only thing to be concerned about is if the order will actually arrive given whatever shipping option you choose. For example, USPS usually gives packages to the nation's mail service which for some countries will never deliver the item.

kwagyeman

See here just for info: https://github.com/openmv/openmv/wiki/F ... evelopment

You can do a ubuntu vm on a windows machine.

kwagyeman

It just isn't linked into the build.

I can fix that for you in a custom image after I get this release out.

Um, just a question, do you have a linux computer and do you know how to compile MicroPython? If so, you should just get setup with the firmware dev environment to have full control.

kwagyeman

Sorry, I forgot about this post for a while. Okay, so, find_blobs() will work for this. First, you setup the thresholds to find the color of the triangle. This will let you find all the triangles in the image. find_blobs() will tell you the centroid of the object. So, that's the location. find_blobs...

kwagyeman

Mmm, put a bug on it in the openmv repo.

kwagyeman

Mmm, okay, well, you should at least be able to use the IDE to update the main script easily.

kwagyeman

"sensor" is a built-in module we use... not sure if you should be shadowing that. Maybe rename that file? As for the requirement of reset behavior. That's a deeper issue into how MP works. I can't tell you that exactly from my knowledge. Could be a bug with the system, or not. Maybe Ibrahim knows mo...

kwagyeman

kwagyeman

Okay, I should just be able to generate a patched version of the firmware for you. Not an official release or anything. I'll do this after we do this release we've been gearing up for. Note: I'm just going to patch the machine.I2C file.

kwagyeman

Well, I'd rather not have you dropping the project.

But, from reading the above you found a workable solution in the mean-time right?

We might be also able to just patch that one file.

kwagyeman

Okay, well, find_blobs() again can be used for this task using just grayscale. The ratio between the area of the bounding box around the object and the number of pixels tracked in the object is different for rectangles, circles, and squares. However, what's the vision setup for your problem? Are you...

kwagyeman

We're at version 1.8. But, we're not likely to update to the newest version until after the M7 ships. Every time we update a lot of things break. So, that would be done when more or less everything is working to make fixing everything easy. Oh, note that we've finished prototyping the M7 and have go...

kwagyeman

cagiva - check if the packet was acked... if you have a protocol analyzer that would be good to use. Otherwise, use the exception mechanism and try the command again.

kwagyeman

I'll make sure to include the machine doc in the doc release I'm about to do.

kwagyeman

Hi, getting an image out of the OpenMV Cam is the simple part. But, do you know how to do any of the internet plumbing details? We have a simple script for turning your OpenMV Cam into a webs server to host JPEG images. But, if you want to do more than that. Anyway, let's try to break this problem d...

kwagyeman

Hi, what kind of shape detection do you want to do? find_blobs() gives you an area and pixels that match the color settings in that area. This can be used to distinguish between circles and squares. However, I'm assuming you want something else right?

kwagyeman

Well, I believe the machine.i2C module is compiled into the binary right now but I can't say we support it. I'm not going to press Ibrahim to update MP right now since everything breaks when we do that. However, it would be nice to have the time available to do the update. I'm working on getting our...

kwagyeman

The diode is there to protect you from breaking the USB. However, 3.3V can be an input or output as long as VBUS and VIN aren't connected.

kwagyeman

Hi, any reason you need the machine module? We're about to update the docs and no effort was put in to document that since we're using pyb.I2C.

kwagyeman

Use pyb.I2C. I've never tested the machine variant.

kwagyeman

Mmm, well, if you need a pre-canned library then use the Arduino. It honestly shouldn't be to hard to make the OpenMV Cam do that however. I'm assuming the coms work via serial using some type of simple protocol right? Anyway, if writing the com interface in python doesn't work for you then I'd use ...

kwagyeman

Ibrahim looked into this once for reading digits on a meter. It's actually possible by using image templates. So what you do is basically take a picture of each number with the OpenMV Cam. Save these as templates, then since the camera will be locked into a fixed position with the display you also k...

kwagyeman

You definitely want to use SPI to send an image to the Arduino. So, make the OpenMV Cam into a SPI slave and read the image out. You just have to do the sync byte things I did in the script and then it's pretty stable. That said, why do you want the Arduino in the equation at all? What can it do tha...

kwagyeman

Great!

kwagyeman

Hi, okay, so you got to the last part. That's the DFU update. DFU update will fail immediately unless the device is connected. You should see the DFU device in your windows device manager under the USB device section as something like this: http://forums.openmv.io/download/file.php?mode=view&id=61 Y...

kwagyeman

Hi, just try to connect and the IDE will walk you through how to DFU update the board. Are you on windows? If so this this is easy and 100% works. Just click the connect button and then say your board is bricked after connect fails to connect to your board.

If you are on linux or mac let me know.

kwagyeman

Great for you! So, I spent all day on these two scripts. Learned a lot. Wrote notes in the code. https://github.com/kwagyeman/openmv/blob/870985178a91f7ca1dacf8e866f92f02037b0eb7/usr/examples/02-Board-Control/arduino_spi_slave.py https://github.com/kwagyeman/openmv/blob/870985178a91f7ca1dacf8e866f92...

kwagyeman

Just install the M4 firmware and run this script: https://github.com/openmv/openmv/blob/m ... ns_zoom.py

kwagyeman

I actually do plan to support April Tags. I've found the C++ library for it. Reviewed it, and determined it can be ported. However, I'll have to rewrite almost every line since the C++ library depends on OpenCV calls and it uses C++ objects. The QRCode library only required minor changes to be porte...

kwagyeman

Hi, use pyb.mills() as the time base. Doing a loop with 100 was just the easiest to write when we were updating the firmware in a blitzkrieg last year. As in, track the milliseconds between frames and start to compress the next frame once some number of milliseconds passes. This will let you slow th...

kwagyeman

Hi, please let me know if the firmware.bin file loads now. Your boot loader on your OpenMV Cam should have been updated to work better.

kwagyeman

Hi, do you think you can wait till the weekend? I need to do a video update for the company blog and I don't have the cycles tonight. Ping me if I forget about this on the weekend.

I'll try to do a SPI/ Serial / and I2C example and I'll make them part of the examples that come with the IDE.

kwagyeman

It sounds like you should try to use the dfu method and that for some reason the regular bootlaoder can't attach. Note that the dfu file contains an updated bootloader which should not have the same connecting issue the current one has on your OpenMV Cam M4 board.

kwagyeman

Hi, I've verified this version of the firmware works on my camera. So, are you using the latest IDE. If so, did you try to load the firmware.bin file or the openmv.dfu file? Assuming you've been able to update the firmware before the firmware.bin should upload without any issues onto your openmv cam...

kwagyeman

Hi, the WiFi shield has these capabilities. http://www.atmel.com/devices/atwinc1500.aspx

5GHz is not supported.

kwagyeman

Hi, I have an Arduino at home. I can debug this code for you tonight. But, can you do this for me in the mean time, just strip out everything from both scripts except the I2C commands. Since I think you'd prefer the Arduino as the master I'll try to get that working. I'll try to make the code as you...

kwagyeman

Hi, sorry about that. The ADC was tested and working before. However, we periodically pull in changes from MicroPython's main branch and things break like this. Attached are two files. The openmv.dfu file for dfu firmware updating and the firmware.bin file for our own custom bootloader. Note that th...

kwagyeman

Hi, let me check the latest firmware for the ADC. There was a bug that we pulled in from MP that broke it a while back. I can just upload a copy of the newest firmware for you to flash to fix this.

kwagyeman

kwagyeman

Yes, you can use a 3.7V battery to power the system. Please apply it to the VIN pin to go into the regular. The system cannot charge the battery however. We don't have a battery charging circuit on board. This is something I'd like to do in the future. The goal for the M7 board was not to break the ...

kwagyeman

K, we took a lot at this and to support the new format would require a rewrite of the haar code. This is not really feasible for us. The new haar format uses a different type of data structure so it's not even just fixing renames and etc. Can you load the new format back into OpenCV and then save it...

kwagyeman

Ibrahim will have to check on this for you. It should be possible to update the conversion script to support the new format too.

kwagyeman

The main.c file for OpenMV which controls this mounts one of or the other file systems. It hasn't been a priority to fix currently. So... the OpenMV Cam either exposes the SD card or the flash file system if the SD card isn't inserted. I personally think this should work like the pyboard. But, Ibrah...

kwagyeman

Here's are versions of the eye tracking scripts with serial output added.

kwagyeman

Thanks!

kwagyeman

We install the latest version of our firmware with MP. Ibrahim will need to update our code base to the latest MP version. This usually breaks a lot of stuff each time he does this so it's somewhat avoided if not necessary. For the M7 board we will pull in all MP changes again. As for the documentat...

kwagyeman

Hi, the blue led blinking is the heart beat script running. The red LED turning on is the computer accessing the flash drive. As for the the blue and white LED flashing. That's an error. Can you try to reformat your SD card? The system probably can't read it. We have tested the system with 32GB SD c...

kwagyeman

If you edit the firmware, otherwise no. However, you can just tie the two lines (RX/TX) together if you only plan to use one pin to send and receive on. Just make sure to add a series resistor between the two devices.

kwagyeman

It looks like there's a lot of PC side software for that program. What part of it do you want explicitly? Just the serial code? You should be able to use files like this part of it without much modification: https://github.com/ArduPilot/pymavlink/blob/master/fgFDM.py Just install all the parts of th...

kwagyeman

Great!

We do actually test all cams with a firmware image and it's weird that it somehow doesn't work once you get it in your hands...

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