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    Offloading data from a SD data logger?

    I have a simple circuit that logs very low-density, occasional data to a micro SD card and would like some insight on how others have handled getting data onto a computer

    I had implemented this...
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    Just so I'm clear: this update is only for legacy...

    Just so I'm clear: this update is only for legacy compatibility and doesn't extend TouchRead() capability on these boards, correct? Or is there some advantage to using this library over TouchRead()...
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    Thanks, Mevon-- I had suspected given the tone...

    Thanks, Mevon--

    I had suspected given the tone of the conversation that fundamental plumbing work was required in order to enable this in Teensyduino. I unfortunately do need Arduino libraries and...
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    Hi, all-- I figure I'll resurrect this thread...

    Hi, all--

    I figure I'll resurrect this thread to ask about the original subject line. Several months ago there were some discussions about possibly implementing USB-MSC as a USB mode (selected...
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    Incidentally, Paul, if the power supply were to...

    Incidentally, Paul, if the power supply were to be a regulated 3.3v input, would you wire the same way (with cut pads and diodes) but supply input power to the 3.3v pin on the Teensy 3.0?
  6. Thanks for this helpful response--I had a feeling...

    Thanks for this helpful response--I had a feeling that physically connecting VUSB to a pin and reading that was the way to go but wasn't sure if there was a software-only method I was missing.

    I'm...
  7. This library really is quite wonderful for simple...

    This library really is quite wonderful for simple low power mode switching--nice work!

    One question: on my project I'd like to use low power run, but only when the device is being powered by an...
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    Does anyone have any input here? This is a pretty...

    Does anyone have any input here? This is a pretty important question for a (professional) project I'm working on. Thanks!
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    Emulate Bluetooth Keyboard/Mouse/Joystick/HID?

    I would like to control an iOS device using buttons attached to a Teensy (likely 3.0 but 2.x would work, too). In order to do what I'm looking to do on an Android device, I can use Teensy's Keyboard...
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    Ah--sorry that I wasn't specific. I'm wondering...

    Ah--sorry that I wasn't specific. I'm wondering about the Mass Storage USB mode emulation that mounts the SD card as a removable storage when the Teensy is connected to a host computer. It's...
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    I'm glad to see the updates to the SDFat...

    I'm glad to see the updates to the SDFat library--I'll have to try them out. Any news on when the SD USB mode for Teensy 3.0 might be coming?
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    Just checking to see if there's been any work on...

    Just checking to see if there's been any work on this yet--it will be really helpful in a few scenarios. But I know you have quite a bit on your plate, Paul, so please don't take this as an impatient...
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    Capacitive touch on a handheld device?

    I am working on a project with T3 that will ultimately be handheld and battery-powered in a plastic case. I'd like to add a capacitive button to the case via the T3's TouchRead pin/function, and I'm...
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    T3 SD USB support?

    Is USB MSC (disk) support, using the SD card, planned for the T3 as implemented in T2?

    Thanks!
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    Timer-based interrupts?

    Is there an easy command to set up a timer-based interrupt? I've seen threads on manipulating interrupt registers but I think that's beyond my current understanding. Just checking to see if there's a...
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    Fully understanding the lack of optimization, I'd...

    Fully understanding the lack of optimization, I'd like to ask a clarifying question regarding performance of the code you posted, Paul: When I run the basic example from the Encoder library (on a T3...
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    Great--I'm powering VIN with AA batteries. So all...

    Great--I'm powering VIN with AA batteries. So all is good.

    Thanks!
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    One follow up question, then, regarding reverse...

    One follow up question, then, regarding reverse polarity: what is the function of the parallel diodes between VBAT and the chip's VBAT and VIN -> VREGIN? Do they provide any sort of protection from...
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    That's what I assumed--just checking.

    That's what I assumed--just checking.
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    Paul, you mentioned in an earlier post that there...

    Paul, you mentioned in an earlier post that there was reverse polarity protection when powering via Vin, which I see from the dual parallel diodes. But will reverse polarity applied to 3.3v harm the...
  21. Accessing virtual serial in Keyboard + Mouse + Joystick mode?

    I'm thrilled to have Keyboard USB mode functioning since that's one of the key remaining functions I needed to port over a Teensy 2.0 project to Teensy 3.0. However, in doing the port I added a...
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    Thanks so much! Keyboard is working well so far...

    Thanks so much! Keyboard is working well so far for what I need...

    Is there a way for non-Arduino software to access the emulated Serial port from Windows 7 when in Keyboard mode?

    Also, I am...
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    Hi, lami--to clarify, I'm not interested in using...

    Hi, lami--to clarify, I'm not interested in using Li-Po myself on this project; instead, I actually will be using 1xAA due to size limitations (and it provides 20 hrs of runtime in my application,...
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    My goal is to have it be safe for both a battery...

    My goal is to have it be safe for both a battery and USB power to be hooked up simultaneously. When power is applied via USB, the regulator and inductor on my power supply breakout prevents any...
  25. I'm pretty sure that the Keyboard USB mode is not...

    I'm pretty sure that the Keyboard USB mode is not yet implemented and therefore the functions won't work. Only Serial is working in the latest beta--Paul, is that correct?
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    Good question--I assume the thought is that the...

    Good question--I assume the thought is that the stable 3.3v applied to the 3.3 line won't travel backwards through the regulator and into the USB. Is that how regulators work? I'm not an EE. If so,...
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    Re: li-po charging--I had asked the same question...

    Re: li-po charging--I had asked the same question at Adafruit a few months ago about doing the same thing with Teensy 2.0. I don't know that new diodes were involved since the necessary ones were on...
  28. Paul, I created another thread in this forum...

    Paul, I created another thread in this forum about compile issues with your Encoder library on Teensy 3.0. Are you aware of this issue? That might affect the short-term feasibility of using encoders....
  29. Thread: Rotary Encoder?

    by djsz
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    Rotary Encoder?

    It seems that the Encoder library linked from PJRC won't compile. Here are the errors using the example from the library:


    ...\libraries\Encoder/Encoder.h:59: error: ISO C++ forbids declaration...
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    A quick follow up: I swapped my SPI display out...

    A quick follow up: I swapped my SPI display out for the equivalent Adafruit breakout in I2C and it works, even with the commented out TWBR lines. However, it is extraordinarily slow--I write to...
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    Right. In your documentation for teensy 2 you...

    Right. In your documentation for teensy 2 you specify that one should connect a diode between the battery and vin to prevent the computer from pushing current successfully to the battery. Does adding...
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    On point 8 above, would the risk be eliminated if...

    On point 8 above, would the risk be eliminated if you cut the VUSB and Vin pads to separate them and soldered a Schottky diode across those pads? This is similar to the recommendation on Paul's web...
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    Touch sensing: sliders, rotary, etc

    So I'm a complete novice with all things regarding touch sensing but I'm curious to know if the Teensy 3.0 will be capable of supporting touch control scenarios similar to the control types supported...
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    Looking at the size of the solder pads I think an...

    Looking at the size of the solder pads I think an SMT part will be better than the clipped through-hole diode I was able to use on T2. Looks like this part is the SMT equivalent of the 1N5817 diode....
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    Fixed!

    It's fixed. As much as I thought it wasn't, this was a soldering issue. I touched up each pin on both the T3 and adapter and now everything works perfectly.

    I have now learned to listen to Paul...
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    Yes, I tried pin 4 with no luck. I'll email you...

    Yes, I tried pin 4 with no luck. I'll email you offline.

    Thanks!
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    I'm wondering if this isn't a problem with...

    I'm wondering if this isn't a problem with hardware SPI on my Teensy: I got the Adafruit SSD1306 library to compile (but had to comment out some lines related to TWBR) and run a display via software...
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    SSD1306 compatibilty change?

    I have this working with an Adafruit 128x32 OLED SSD1306 display via SPI but had to make one more change in addition to the ones outlined in this thread. But I have no idea what this means (outside...
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    Great--thanks! Didn't mean to sound snippy in my...

    Great--thanks! Didn't mean to sound snippy in my previous response...it's been a long morning...
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    I may power from 3 AA batteries on some projects,...

    I may power from 3 AA batteries on some projects, and for me that decision doesn't affect my primary question here: really what I want to know is how Option #3 gets implemented on Teensy 3.0.

    The...
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    External power on Teensy 3

    Hi, all--

    I'd like to use Teensy 3 with a battery pack and want to check my assumptions before doing anything. I have previously modified a Teensy 2.0 per Paul's instructions here using the...
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    Yes, that's the one. I've since tried different...

    Yes, that's the one. I've since tried different jumper wires, switched holes on the breadboard for the Teensy and the adapter, and have used two different SD cards consistently (one 4GB SDHC, the...
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    Yes, definitely a possibility, and I thought...

    Yes, definitely a possibility, and I thought about that first--but I checked each pin with an LED and it was able to light consistently, and visual inspection on those pins looks OK. Paul, you said...
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    Update: I momentarily had the listfiles example...

    Update: I momentarily had the listfiles example working with the SD library in beta 6 (but not the SdFat beta) after removing my custom library folder within my sketchbook, but that unfortunately...
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    Yes, good catch. It has worked well, but I put...

    Yes, good catch. It has worked well, but I put that in having copied it from another example. The sd initialization fails even if the sketch consists only of the variable declarations, sd.begin() in...
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    I'm sure the adapter hardware is functional;...

    I'm sure the adapter hardware is functional; that's why I tested it on both my T2 and T3. My thought is that the T3 could be faulty, but that doesn't yet make sense because I can't get the SdFat...
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    So I've bridged the 3v pads to bypass the...

    So I've bridged the 3v pads to bypass the regulator, ensured I'm powering with 3.3vo, and am still having trouble. I've initialized the library with SPI_SIXTEENTH_SPEED and at one point got the...
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    Thanks for the input, @JBeale and @pixelk. I'm...

    Thanks for the input, @JBeale and @pixelk. I'm using the MicroSD adapter that Paul sells through PJRC--it has a 3v voltage regulator and a buffer chip (74LCX25) to handle 5v-3v logic. I've tried...
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    One other thing I noticed: when using other SPI...

    One other thing I noticed: when using other SPI devices the CLK pin, which is the same as the LED at pin 13, flashes the attached LED consistently during SPI activity. When running any of the SD...
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    SD issues on Teensy 3

    I've been enjoying my Teensy 3 and using the on-board RTC, touch pins, and have wired up LCD and OLED displays from Adafruit. However, I can't get the SD library working with the PJRC Micro SD...
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