**** BEGIN LOGGING AT Sat Nov 07 03:00:32 2020 Nov 07 17:51:52 hello folks Nov 07 17:52:03 i am completely new to BBB... Nov 07 17:52:17 i tried connecting the board to my Windows 10 laptop, Nov 07 17:52:59 it should work plug&play on windows 10, unless it's running ancient firmware Nov 07 17:53:07 using an USB cable.. only the Blue light next to the 5V pin is ON for a while and then it turns OFF.. now I don't see my board detected in my This PC Nov 07 17:53:24 that sounds like it might be getting insufficient power Nov 07 17:53:26 did I damage the board accidentally? Nov 07 17:53:43 yes yes there is an error message that Power surge on the USB port Nov 07 17:54:06 so the board is fine, but your laptop's usb port is unable to power the BBB Nov 07 17:54:22 so what should I do here? any suggestions? Nov 07 17:55:27 i do have a 5V power supply.. should I try using that? But how does that work in conjunction with the USB? Nov 07 17:56:13 if you connect a 5V power supply to the 5V barrel jack it will not draw any power from usb, so in that case you should be able to connect it to your laptop without problems Nov 07 17:56:41 you mean connect both the 5V power supply and the USB as well? ok, let me try that right away Nov 07 17:56:42 thanks Nov 07 18:00:50 sorry but I don't see any change.. Nov 07 18:01:07 but i can feel a burning smell near my board Nov 07 18:02:11 uhhhhhhhhh Nov 07 18:02:26 you sure that supply was 5V ? Nov 07 18:03:04 (5V DC, center positive) Nov 07 18:05:37 the board should have immediately powered on when you connected the power supply, if it didn't then something is very wrong (and needless to say, a burning smell is also a sign that something is very wrong) Nov 07 18:07:03 the power supply is 5V.. Nov 07 18:07:47 by powering ON you mean the 4 LEDs should be flashing or in ON state right? Nov 07 18:08:01 the board is quite hot as well Nov 07 18:08:32 at a minimum the power led should have turned on Nov 07 18:08:57 wait, can you clarify, is this the first time you're trying to get the board to work or has it worked previously? Nov 07 18:09:08 first time Nov 07 18:09:28 also, things like "burning smell" and "quite hot" mean you should probably immediately disconnect power Nov 07 18:09:32 if I remove the 5V i see the power LED ON Nov 07 18:12:24 if it was getting hot yet not even the power led was on then something was very very wrong, e.g. reverse polarity maybe? (center-positive is most common for these plugs but unfortunately there's no absolute standard and occasionally one encounters weird power supplies) Nov 07 18:13:12 does the board power on if _only_ the power supply is connected, no usb? (if it doesn't, immediately disconnect it) Nov 07 18:14:29 i inspected my power supply, it says Pri 100 to 220V and Sec 5V Nov 07 18:14:36 so i think I misread the power supply Nov 07 18:15:04 that sounds okay, as long as it's 5V DC and the center of the plug is positive Nov 07 18:16:13 the fact that the input has a large range (rather than a single voltage) means it's switching power supply and not an old-fashioned transformer, hence the output is pretty much guaranteed to be DC Nov 07 18:16:16 if I connect only the powersupply then none of the LEDS are ON Nov 07 18:16:59 then the power supply is faulty or incompatible, e.g. reverse polarity Nov 07 18:17:07 and/or the BBB is damaged Nov 07 18:17:33 ok.. I will have to get it replaced then.. Nov 07 18:17:39 thanks a lot for your time Nov 07 18:18:13 if it is indeed reverse polarity then it may also have damaged the BBB... I know it can tolerate reverse polarity briefly, but it sounds like it was connected for extended time (and again, a burning smell is generally not a good sign) Nov 07 18:33:51 ok.. thanks a million... Nov 07 18:33:56 so kind of you Nov 07 20:37:55 5v supply with center positive? Nov 07 20:38:18 nvm Nov 07 23:09:02 Does anyone know where I can find the exact kind of Cortex-M4 that is on the AI? Nov 07 23:09:49 I am asking b/c I am in this book, it is calling for ARM KEIL, and there is a section where I need to add the exact kind of M4 on the debugger source. Nov 07 23:10:34 I went to the TRM and it says two Dual Core Cortex-M4 co-processors only from what I can tell. Nov 07 23:11:06 I seriously doubt there's any book that will help you target the M4 cores on the AI, if you want to experiment with a cortex-m4 get some well-supported microcontroller or something Nov 07 23:11:29 @zmatt: I am a good person at paraphrasing. Nov 07 23:11:36 I can adapt things well. Nov 07 23:11:46 no, you do it frequently, that's not the same as being good at it Nov 07 23:11:52 Ha. Nov 07 23:11:55 Come on. Nov 07 23:12:05 Just give this brother a change of ideas. Nov 07 23:12:25 But, this "change of ideas" should in your mind. Nov 07 23:12:27 Try it! Nov 07 23:12:38 should = should be Nov 07 23:14:17 TI has 350 devices on the ARM KEIL source. Nov 07 23:14:40 I need to figure out which one, if any, are listed so I can start over again. Nov 07 23:15:09 @zmatt: Just tell me. Please. Nov 07 23:15:23 I will give you an hour w/out me chatting! Nov 07 23:16:35 LM4F? Nov 07 23:17:00 LM3S? Nov 07 23:17:18 Fine. Nov 07 23:17:20 Sheesh. Nov 07 23:17:36 the SoC on the BBAI is the AM572x Nov 07 23:17:42 Right. Nov 07 23:17:50 Okay. Nov 07 23:18:45 TI does not even have, out of their 68 articles for the AI, a section for the M4s onboard. Nov 07 23:19:16 I will go and search again. Nov 07 23:19:20 I already told you that of all the cores on this SoC, the M4s may very well be the hardest to target Nov 07 23:19:32 and also the least useful to target Nov 07 23:20:14 they don't have special I/O capabilities like the PRUs, they don't have strong computational power like the DSPs and EVEs Nov 07 23:20:25 I see they are good for motors. Albeit, I understand where you are coming from on this idea. Nov 07 23:20:54 they have no particular capability that makes them specifically suited for motor control Nov 07 23:21:10 I can access UART and GPIO from them, they have low cycles per instruction, and low power consumption. Nov 07 23:21:37 Well, w/ some source, I can finally access GPIO from them. Nov 07 23:22:10 everything you can do on them you can do on PRU, except doing it on the M4 is harder Nov 07 23:22:31 Sort of but there is more space on the M4s. Nov 07 23:22:48 If I start PRU instructions, I may never quit and... Nov 07 23:23:01 The M4s are well documented like you said. Nov 07 23:23:12 fair, that's about the only benefit, but the PRUs still have plenty of memory for most sensible applications Nov 07 23:23:23 the ones on the AM572x aren't :P Nov 07 23:23:33 Well, maybe not these specific ones but there are many that books dedicated to them. Nov 07 23:23:55 yeah but I'm not sure how helpful any of those will be Nov 07 23:24:14 anyway, I don't actually want to spend any time on this, so Good Luck Nov 07 23:24:18 afk Nov 07 23:24:36 Ha! Fine. I will cry later about this ordeal. Nov 07 23:24:40 But... Nov 07 23:24:55 I will keep asking around. Nov 07 23:25:05 Hopefully, you will give in one day. Nov 07 23:30:10 * GenTooMan turns set Nov 07 23:30:14 off. Nov 07 23:30:26 * GenTooMan hates it when he mistypes Nov 07 23:31:29 ha Nov 07 23:32:38 set_ can be too shiny so you need to dim occasionally heh Nov 07 23:34:58 * set_ Love its! Nov 07 23:35:17 * set_ John Love Its if you are nasty! Nov 07 23:35:22 Ha. Nov 07 23:35:27 Hey. Nov 07 23:35:43 What M4s are on the am5729? Nov 07 23:36:20 I got like eight books on the M4, I need to read more, and the AI has two, dual core M4s on it. Nov 07 23:36:30 Shoot! Nov 07 23:37:17 I got a list of 450 of them. I need to figure it out. I am sure if anyone outside of @zmatt knows, GenTooMan, you would know? Nov 07 23:38:22 set_: the M4s on the AM572x are "the M4s on the AM572x" Nov 07 23:39:02 if the AM572x is not listed as part number, it is not likely you will be able to target them successfully Nov 07 23:40:12 or I should probably say "even less likely" Nov 07 23:42:12 Fine. Nov 07 23:42:21 Okay, I understand now. Nov 07 23:42:21 life is fun when you are a quantum mechanic, it's always most uncertain. Nov 07 23:42:50 Add gas? Nov 07 23:46:03 https://www.ti.com/lit/ug/spruhz6l/spruhz6l.pdf?ts=1604792606216&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FAM5728 Nov 07 23:46:16 start at page 1816 Nov 07 23:46:47 I know. Nov 07 23:46:49 I am there now. Nov 07 23:47:24 So, 80MHz, xx KB RAM, and xx KB ROM? Nov 07 23:47:42 I wonder if I can pick a generic out of the ARM KEIL program? Nov 07 23:48:10 look at page 383 Nov 07 23:48:14 1.3.5 Nov 07 23:48:41 think CCS would give a hint zmatt? Nov 07 23:49:00 I am there now. Nov 07 23:49:03 I see. Nov 07 23:49:22 But, generics will not help w/ this one. Work dedicated to it will have to be done first. Nov 07 23:50:22 L1 = 32 KB shared mem. Then, L2 is 64 KB RAM and 16 KB ROM Nov 07 23:53:14 Anyway, no issue. I will try to stay patient for other things to transpire (as usual). Nov 08 00:02:22 I suggest look for it's memory map. Nov 08 00:10:25 Okay. I will review it. Nov 08 02:16:34 GenTooMan: I reviewed the mmap sections for different peripherals and devices. I do not think the name for the M4 is located in those listings. Nov 08 02:17:55 IPU, yes. But, w/ the ARM KEIL source, they are listing them as LM4F21OE... and so forth. Nov 08 02:28:02 GenTooMan: I think everything about this plan is bad and I don't really want to encourage any part of it... fortunately it's doomed to failure anyway Nov 08 02:30:14 Forget the plan. "hand over the goods." Nov 08 02:30:15 Ha. Nov 08 02:31:23 I got this ooosome M4, actually dual * 2 M4s and I cannot use them b/c of a listing, name, and/or label of such said M4. Nov 08 02:31:26 Not fair. Nov 08 02:39:22 7.3.1 under 7.3 shows a link. It is a 404 link but still. I think once it may have been a good link. Nov 08 02:39:42 Anyway, I clicked it. Dang it. Nov 08 02:47:27 * GenTooMan watches set_'s computer quietly fold itself and disappear as a singularity. Nov 08 02:48:02 Okay. So, I think it is just a revision issue. The r0p1 revision is listed but just as a generic M4, i.e. not as a LM4Fxxxx or whatever. Nov 08 02:48:32 So, I cannot find it. It is mystery madness movie mayhem. Nov 08 02:52:44 Are the DSPs onboard ARMv6? **** ENDING LOGGING AT Sun Nov 08 03:00:00 2020