**** BEGIN LOGGING AT Fri Aug 19 02:59:58 2016
Aug 19 13:01:09 <bradfa> kiran4399: VCC pins? the manual will tell you what each pin on the P8/9 connectors are, and you can always supply more than one module with the power from a single pin (so long as you don't exceed the rating of the pin)
Aug 19 13:01:52 <bradfa> https://github.com/CircuitCo/BeagleBone-RevA6/blob/master/BeagleBone_SRM_A6_0_1.pdf?raw=true
Aug 19 13:02:46 <bradfa> or https://github.com/bradfa/beaglebone_pinmux_tables/blob/master/beaglebone_pins_p9
Aug 19 15:57:12 <chanakya_vc> hey bradfa . I am working on the documentation. I will finish up with SPI In a about an hour.
Aug 19 15:57:38 <chanakya_vc> If you like the way I have done it, then I will start with I2C.
Aug 19 15:58:02 <chanakya_vc> I am putting up some diagrams about how the driver and firmware interact
Aug 19 16:55:51 <pmezydlo> m_w: hi, are you there
Aug 19 16:56:09 <pmezydlo> m_w: do you check my wiki page before evaluation?
Aug 19 16:56:28 <pmezydlo> m_w: https://github.com/pmezydlo/SPI_slave_driver_implementation/wiki
Aug 19 16:56:34 <m_w> sure
Aug 19 16:56:49 <pmezydlo> thanks
Aug 19 16:59:41 <pmezydlo> relevant information seem to be on top
Aug 19 17:02:32 <m_w> okay is this the URL you are going to submit?
Aug 19 17:05:15 <pmezydlo> yes I think that is the best option
Aug 19 17:05:40 <m_w> okay then I will see if it meets the requirements
Aug 19 17:46:17 <bradfa> chanakya_vc: ok
Aug 19 17:46:29 <bradfa> chanakya_vc: when you have something you'd like me to look at, just let me know
Aug 19 17:46:37 <chanakya_vc> bradfa, I am stuck with some formatting issues
Aug 19 17:46:42 <chanakya_vc> Working on it
Aug 19 17:46:59 <chanakya_vc> Markdown giving me troubles :(
Aug 19 17:47:33 <chanakya_vc> Can't seem to get the code blocks to align with one another
Aug 19 17:48:52 <chanakya_vc> If I am not able to complete today, I will send you a mail when I am done.  I am confident of finishing it by  tomorrow.
Aug 19 17:48:55 <chanakya_vc> bradfa, ^^
Aug 19 18:04:51 <Visaoni> hey bradfa, m_w, either of you about? having some issues Wormo thinks might be caused by pin contention
Aug 19 18:07:01 <m_w> hey Visaoni
Aug 19 18:07:17 <m_w> did you submit your final report?
Aug 19 18:08:53 <Visaoni> not yet. first thing up for today but I wanted to get a jump on this to make sure I didn't miss you
Aug 19 18:10:08 <m_w> so what is the issue?
Aug 19 18:12:16 <Visaoni> well, actually attaching the adc to the board prevents it from booting. I have some more details up at https://docs.google.com/spreadsheets/d/1s781bYjKfvTh_QKKgioCNoXx-vbFK6uxDbj3XJIxwbs/edit?usp=sharing
Aug 19 18:12:41 <m_w> do you have a schematic?
Aug 19 18:14:37 <Visaoni> of my stuff? no. I could put something together. or do you mean sheets for the adc?
Aug 19 18:14:40 <bradfa> Visaoni: you're using a bunch of hte sysboot pins, just make sure that your ADC is tristating all its pins and not pulling/driving them when you boot up
Aug 19 18:15:19 <bradfa> Visaoni: P8-31 through P8-46 (inclusive) are the sysboot pins
Aug 19 18:15:24 <m_w> link to the evm schematic?
Aug 19 18:16:30 <Visaoni> evm sheet - https://drive.google.com/file/d/0B46Ie_ByydZ4Q0QzSG5tY0pNVE0/view?usp=sharing
Aug 19 18:17:46 <Visaoni> bradfa: hm... I am using those, although I've traced the problem back to involving P8_20 and P8_21 in particular
Aug 19 18:18:07 <bradfa> Visaoni: those are the eMMC cmd and clk pins
Aug 19 18:18:09 <bradfa> at least on BBB
Aug 19 18:18:14 <bradfa> iirc
Aug 19 18:18:35 <m_w> yikes
Aug 19 18:19:30 <Visaoni> ah, that could do it
Aug 19 18:19:45 <bradfa> Visaoni: if you are using P8-20 and/or P8-21 at all or even trying to boot from eMMC, youre going to have pain
Aug 19 18:20:06 <m_w> you will have to boot from SD card
Aug 19 18:20:26 <bradfa> Visaoni: get yourself a BeagleBone White or BlueSteel board if you need to use those two, or rewire the sysboot resistors to not boot from emmc1 first
Aug 19 18:21:03 <Visaoni> SD it is then
Aug 19 18:21:16 <bradfa> Visaoni: if you need to, you can likely write to the reset register in the eMMC to enable it to respect the reset line and then just hard wire the eMMC-RSTn pin to hold it in reset, to ensure it doesn't interfere
Aug 19 18:21:28 <bradfa> not sure you need to go that far though
Aug 19 18:21:50 <m_w> no other available pins?
Aug 19 18:21:55 <bradfa> (eMMC almost always ships with the registers setup such that the external hardware reset line doesn't actually do anything)
Aug 19 18:22:31 <Visaoni> none. I'm using every last pin on PRU1 and don't have an easy candidate to drop
Aug 19 18:22:50 <m_w> I am pretty sure that the beaglelogic uses an SD card image to avoid such issues
Aug 19 18:23:11 <Visaoni> I suppose I could try to grab a shift register or something and consolidate the data lines to free up a bunch
Aug 19 18:23:24 <m_w> https://github.com/abhishek-kakkar/BeagleLogic/wiki
Aug 19 18:24:01 <m_w> there is a no setup required SD card image
Aug 19 18:26:28 <m_w> a shift register could slow things down substantially
Aug 19 18:26:44 <Visaoni> ah, true
Aug 19 18:26:51 <Visaoni> so should just booting from an SD card be enough then?
Aug 19 18:27:11 <Visaoni> doesn't look to me like BeagleLogic is doing anything explicit with emmc1
Aug 19 18:27:37 <m_w> there is a overlay setup probably
Aug 19 18:28:16 <m_w> the trick is booting with the appropriate bootargs I believe
Aug 19 18:34:35 <Visaoni> m_w: by bootargs you mean [the contents of] uEnv.txt?
Aug 19 18:35:17 <m_w> yeah
Aug 19 18:35:54 <m_w> bootargs is a u-boot environment variable
Aug 19 18:37:03 <Visaoni> alright cool. thanks m_w, bradfa :)
Aug 19 18:37:25 <bradfa> Visaoni: I'd advise ensuring you hold the alt boot button on BBB to avoid the am335x from driving the mmc1 clock and cmd pins, at least the first time you boot
Aug 19 18:37:59 <Visaoni> noted
Aug 19 18:39:39 <m_w> dtb=am335x-boneblack-emmc-overlay.dtb
Aug 19 18:40:06 <m_w> this is the overlay that disables the eMMC
Aug 19 19:16:33 <amragaey> jkridner, hi
Aug 19 19:32:59 <amragaey> jkridner, please check your email.. thanks
Aug 19 20:35:23 <ds2> hmmm
Aug 19 20:35:39 * ds2 releases a gross of crickets
Aug 19 20:40:46 <Wormo> cut it out, they find their way into my house too often already
Aug 19 21:04:19 <m_w> anyone here know what is going on with the beaglebone green wireless wiki on the seeed studio site?
Aug 19 21:04:32 <m_w> it seems to have disappeared
Aug 19 21:05:36 <m_w> http://wiki.seeedstudio.com/wiki/Beaglebone_green_wireless
Aug 19 21:12:50 <Wormo> that page is currently hosed up, doesn't finish downloading
Aug 19 21:13:31 <Wormo> <iframe src="
Aug 19 21:20:46 <m_w> was looking for the schematic
Aug 19 21:20:56 <m_w> no dice online right now
Aug 19 21:21:24 <m_w> but someone that has the board found the schematic on the board and forwarded it to me
Aug 19 23:45:37 <pmezydlo> m_w: how it looks?, is it suitable
Aug 19 23:46:05 <m_w> haven't had much time to look at it
Aug 19 23:46:21 <m_w> working on a schematic for work
Aug 19 23:46:48 <m_w> I can check it out now since I think I got my hours for today
Aug 19 23:47:15 <m_w> give me 10 minutes to switch over
Aug 19 23:47:23 <pmezydlo> ok thanks
Aug 19 23:48:31 <pmezydlo> beagle students are in a good position, I have colleagues in LibreOffice and they send links to Gerrit
Aug 19 23:51:51 <pmezydlo> m_w: I understand that it will soon premiere of the new board
Aug 19 23:52:50 <m_w> it is a custom project so not many people with get to see it
Aug 19 23:53:40 <m_w> I did just finish another PCB recently though which the world can see
Aug 19 23:54:01 <m_w> http://www.emacinc.com/products/pc_compatible_sbcs/IOT-F407M
Aug 19 23:54:42 <m_w> they power tested the first boards today and I will be getting a prototype to test soon
Aug 19 23:55:30 <pmezydlo> I saw that beaglebone x15 is already on sale
Aug 19 23:56:14 <m_w> yeah I don't design beagle products yet
Aug 19 23:56:19 <m_w> :)
Aug 19 23:56:36 <pmezydlo> probably I wait before it will be available in Poland
Aug 19 23:57:01 <pmezydlo> dsp seems to be interesting
Aug 19 23:59:29 <pmezydlo> Yesterday and today I wanted to take a break from c
Aug 20 00:00:09 <m_w> yeah
Aug 20 00:29:27 <m_w> pmezydlo: you are up late huh?
Aug 20 00:30:30 <pmezydlo> i'm here
Aug 20 00:30:48 <pmezydlo> 2:30 at my place
Aug 20 00:31:13 <m_w> so I should hurry up before you fall asleep
Aug 20 00:31:46 <pmezydlo> do not worry about it
Aug 20 00:32:44 <pmezydlo> Polish national team playing handball in Rio now
Aug 20 00:32:51 <m_w> okay the wiki turned out to look like your final report
Aug 20 00:33:38 <pmezydlo> this is the same
Aug 20 00:33:47 <m_w> I think that if you intend on continued work that this page be more project specific and less GSoC specific
Aug 20 00:34:44 <m_w> but the page as it is now points bacl to the code and explains for the most part what has been accomplished
Aug 20 00:34:50 <m_w> back
Aug 20 00:35:35 <pmezydlo> should be two pages one page fot GSoC and the other for project
Aug 20 00:36:34 <m_w> it is okay for now but probably in the future you can split it out
Aug 20 00:38:14 <m_w> where is the API documentation?
Aug 20 00:38:47 <pmezydlo> ioctl describe here: https://github.com/pmezydlo/SPI_slave_driver_implementation/blob/master/driver/spi-slave-dev.h
Aug 20 00:40:14 <m_w> I think this needs to be better explained in the wiki and demostrated with code snippets
Aug 20 00:40:46 <pmezydlo> so you're right I'll add it tomorrow
Aug 20 00:41:05 <m_w> https://www.kernel.org/doc/Documentation/spi/spidev
Aug 20 00:41:25 <m_w> ^ similar to this for the userspace interface
Aug 20 00:41:50 <m_w> you should also explain the kernel interfaces for creating new drivers
Aug 20 00:42:14 <m_w> https://www.kernel.org/doc/Documentation/spi/spi-summary
Aug 20 00:42:24 <m_w> similar to this
Aug 20 00:42:59 <pmezydlo> well add something similar may be a little shorter
Aug 20 00:43:19 <m_w> beyond that I think you are good for the final submission
Aug 20 00:43:55 <pmezydlo> I'll add it as a separate files and links posted on the wiki
Aug 20 00:44:12 <m_w> then continue to work with Greg if he is still willing
Aug 20 00:44:19 <m_w> good
Aug 20 00:46:50 <pmezydlo> I'm going back to work, from tomorrow
Aug 20 00:48:19 <m_w> one thing you should consider for post gsoc is contacting the SPI contributers listed in the spi-summary document for a strategy for mainline acceptence, if you want to go for it
Aug 20 00:48:27 <pmezydlo> I wonder about the addition of the master mode
Aug 20 00:49:23 <pmezydlo> I would like to continue my current target
Aug 20 00:50:04 <m_w> David Brownell passed away so no need to try and contact him
Aug 20 00:51:18 <pmezydlo> who was he?
Aug 20 00:51:33 <m_w> https://lwn.net/Articles/436764/
Aug 20 00:52:20 <m_w> he worked on many parts of the kernel, including the SPI subsystem
Aug 20 00:54:34 <pmezydlo> I wonder what should be added to top layer(driver)
Aug 20 00:55:05 <pmezydlo> I limited the use of a driver for a single user
Aug 20 00:55:48 <pmezydlo> and that I do not like
Aug 20 00:56:40 <m_w> was the intent on having kernel driver other than spislave-dev which call be to the spislave-core?
Aug 20 00:57:07 <m_w> .. call "back" to ..
Aug 20 00:59:23 <pmezydlo> what do you mean?
Aug 20 01:00:10 <m_w> like a driver that makes the spi slave emulate differnt type of devices
Aug 20 01:01:15 <m_w> for instance the spi master interface has a core driver, the controller drivers, and peripheral device drivers
Aug 20 01:02:39 <pmezydlo> yes, more generic framework
Aug 20 01:02:49 <m_w> if you intend on only supporting the spislave-dev interface then you may be able to combine it with the spislave-core, which will simplify the framework
Aug 20 01:03:49 <m_w> but if you want to emulate other device from kernel space you should keep the 3 layers as is
Aug 20 01:05:14 <m_w> and then consider making example driver to emulate something like an ADC or spi-to-uart
Aug 20 01:06:10 <m_w> I remember when you first started you had gotten no feedback on the mailinglist whatsoever
Aug 20 01:06:49 <m_w> and I think with proper examples you could be a lot more convincing
Aug 20 01:06:53 <pmezydlo> spi-slave from the top and something else from bottom, I understand
Aug 20 01:07:34 <m_w> now if the support ever make it upstream it may be wildly different than what you started with but now you have proven that it can work
Aug 20 01:10:01 <pmezydlo> I will think about it, I have to go sleep
Aug 20 01:10:29 <pmezydlo> Thanks, I still have a month vacation, I have time
Aug 20 01:11:11 <m_w> good night
Aug 20 01:11:21 <pmezydlo> bye
**** ENDING LOGGING AT Sat Aug 20 02:59:58 2016