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spirilis

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Everything posted by spirilis

  1. Ha that is cool! I guess one side project I need to pick up "at some point" (code phrase for "sometime next century if I'm still alive") is DIY electrification of our bicycles. My son especially needs some motorized motivation... we moved to an area that's quite hilly!
  2. AI and edge? That sounds fancy... what kind of edge hardware?
  3. HI folks- Old time forum member here, but been away from the microcontroller hobby for a few years... sold my old house, moved to a rental for a year, now finally in a new "permanent" house for hopefully a long time. The basement is an utter mess but I have all my electronics parts, soldering equipment, an entire bin dedicated to TI launchpads, stored in my crawlspace (w/ dehumidifier) for when I clean up this mess of a basement & set up my new workbench. So what's everyone working on these days?
  4. Hi- quick question, do you have any software you like for designing filters? (e.g. FIR or IIR coefficients) I may be dabbling into MSP432 DSP work soon...
  5. Mind you the 20km (actually 30km now?) was tested at the top of two buildings in Norway with clear line-of-sight between them.... but 0.3km still sounds bad to me. Wish I had some time to keep playing with these, as I want to follow up on a lot of this stuff.
  6. I haven't messed with energia in a while but I am pretty sure SoftwareSerial doesn't work on that chip... it was meant for the really small MSP430G2452 and similar which didn't have a hardware UART. Arduino handles softwareserial better. Maybe someone else has a better softwareserial implementation around here, I don't know though.
  7. Bringing back threads from the dead! Can you provide more context here? The GPS shouldn't use the same UART as another device (camera? what kind?) but otherwise yeah, Serial1 should work...
  8. spirilis

    Noise in ADC

    I see you posted an E2E thread for this, that was my only suggestion (interesting to see what TI says about this) https://e2e.ti.com/support/microcontrollers/tiva_arm/f/908/t/601521
  9. I gotcha... I haven't personally used Energia with this chip. I do know that in CCS, it's not good enough to set a #define somewhere for that, I have to make it a compiler directive using the project properties compiler predefine option. So it's highly probable that Energia's not building it with CCFG_FORCE_VDDR_HH=1 correctly.
  10. For 14dBm, EasyLink might tell you 12dBm but only because the RF register setting for 12dBm is identical to the setting for 14dBm, the only difference is the CCFG_FORCE_VDDR_HH=1 which boosts the power to the RF stage internally a bit. Likewise, if you set it to 0dBm with CCFG_FORCE_VDDR_HH=1, your actual transmit power should (theoretically) be a little higher. EasyLink's way of determining this won't tell you though.
  11. spirilis

    CC1350STKUS

    The typical use-case for the CC1350 (as opposed to the CC1310, or CC2640/2650) is as a local Sub-GHz to BLE gateway (helping to get sub-GHz information to a nearby cellphone). So the idea here would be to have a CC1350 radio gateway in the vicinity of your cellphone, and a CC1310 (or 1350, but the 2.4GHz path wouldn't be used) inside the greenhouse transmitting the information long-haul over sub-GHz. Alternately, if antennas permit, you could scrap the whole thing and use the CC2650STK with an external antenna or something and hope your cellphone can receive BLE at that distance. The on
  12. Allocate an NDEF_TXT object first instead of just composing your "Value" variable and trying to send it directly over the NFC: NDEF_TXT t("es", Value.c_str()); int ndef_size = t.sendTo(nfc); nfc.setDataLength(ndef_size) Note the first string in the NDEF_TXT constructor is the language code describing the language used for the text.
  13. Aand. .. Arrow's still doing free shipping, no code needed. $50 minimum for international orders. I'm guessing they're pushing hard to gain a presence in the small-order online commerce arena, but that's good for us! (for now, while shipping is free ) For the most part their online ordering process has improved since last August when I found much to gripe about, and they gave me a contact who manages the web development and I've written him once or twice to report issues I've seen.
  14. Not sure what the JTAG tools run for those, although I think they have a serial bootloader of sorts (the big brother RX series do anyway), and the arch is a modern evolution of the Z80 (taken from NEC when NEC sold their semiconductor division to Renesas) from what I gather. Not important for a smaller chip but, for larger RL78/G14's and such with >64KB flash and/or SRAM, the architecture still uses a 16-bit address bus but with special paging that requires the compiler use "trampoline" code to switch pages as needed (should be transparent to the developer though but adds latency to functi
  15. Well, I am not sure about the interrupt latency (not that familiar with the arch), and the price is more like $1.50ish... but Renesas RL78/G13 is close: https://www.renesas.com/en-us/products/microcontrollers-microprocessors/rl78/rl78g1x/rl78g13.html https://products.avnet.com/shop/en/ProductDisplay?storeId=715839035&catalogId=10001&langId=-1&productId=3074457345625366633 OK, going down a bit, RL78/G12 has a 24MHz part that's <$1: https://www.renesas.com/en-us/products/microcontrollers-microprocessors/rl78/rl78g1x/rl78g12.html?status=No%3B&pin_count=20%3A20%3B#
  16. Hasn't been tested to rigorous standards demanded by production use cases. Plus TI has to state that to avoid being sued if bad things happened that could be traced back to bugs in Energia. (Not an official explanation)
  17. I thought Energia MT implicitly supported creating multiple tasks by having additional source files with different variations of the setup() and loop() functions e.g. setupRadio() and loopRadio() or similar?
  18. I'm a little embarrassed to admit, but, I had no idea the Linux 'sleep' command could take a decimal point..... always thought it had to use integers. Turns out it takes suffixes for 's' (seconds, the default), 'm' (minutes), 'h' for hours and 'd' for days too! DESCRIPTION Pause for NUMBER seconds. SUFFIX may be 's' for seconds (the default), 'm' for minutes, 'h' for hours or 'd' for days. Unlike most implementa? tions that require NUMBER be an integer, here NUMBER may be an arbitrary floating point number. Given two or more arguments, pause for the amount of t
  19. Nope magnification visor w/ extra loupe I can swing down. I think viewing in stereo helps.
  20. Regarding making your own PCB with RF, one nice thing about the TI parts is the TI reference designs, I've used their 2-layer (0.8mm thick) ref design to build a few CC1310 boards of my own, and they work great but the RF passives are all 0402 and require a stencil for solder (OSHStencils stainless works great for this). 0402 is a bear and the absolute lower limit I will go. That said, one of TI's partners made a module for the CC2650 with LGA pads underneath IIRC. That makes the chip far more accessible. Trey German formerly from TI started a small company (Polymorphic Labs) building t
  21. Well whatever you use, 2.4GHz is best due to PCB antenna size. It is a shame the CC26xx series is too expensive since its high sensitivity would help make the distance even with sketchy small PCB antennas. Also for nRF stuff, I wouldn't bet on those actually making 10m at 2Mbps, but it should at 250Kbps. The issue is the human body and how it may reflect/refract RF as the wearer moves around.
  22. Arrow's still doing free shipping now, all orders USA and $50+ International. Bought a few more components (10x HDC1080, 10x TPS61221 for some CC1310 sensor nodes) to stock the bins.
  23. Without having any way of seeing your breadboard adapter socket soldering job and where the passives are, my first assumption is you probably did something wrong with the chip's layout; FYI this isn't a chip you can casually "solder to an adapter" and expect it to work. It has several passives including an inductor, multiple values of decoupling capacitors, a 24MHz XTAL without load caps (load caps are internal) along with a 32.768KHz XTAL with load caps that are expected (earlier revisions of the CC1310 chip couldn't run without the 32.768KHz XTAL). I've been successful in rolling my own bo
  24. I personally won't touch anything other than the F128 model. I think it was a mistake for TI to produce them (especially the CC1310F32, like, wtf?)... with the RTOS being an integral part of the solution.
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