In the Tools drop down menu, select USB TYPE, and within that drop down menu select Serial + MTP Disk (Experimental). You need Teensydunio 1.57 for this. In earlier Teensydunio's, you could only select MTP Disk...
I believe the official PJRC version is only compatible with Teensies. You might get a better answer asking in forums where people deal with the pico pi more often. I've heard that people had adapted the audio library...
IIRC, not all pins have interrupt capability on the LC. Let's see, from the back of the LC card, pins 0, 1, 16/A2, 17/A3,18/A4, 19/A5, 24/A10, 25/A11 and 26/AC12 aren't listed as having interrupts.
Nothing is hooked up to either SPI bus until you connect something. If you connect the audio shield with the default pins, there would be two SPI devices (audio shield and flash memory on the audio shield), but until...
The SPI is a shared bus, so you can have other devices on the bus. Each device must have at least one CS pin that tells the device that the SPI packets are meant for it. There are a few devices that don't have CS pins...
Be careful with TFT displays in cars. I find in terms of using camera displays (both rear monitor and electronic viewfinder) that often times TFT displays have one orientation that is problematical when you view it...
In general, it depends.
If you only use the basic devices (first I2C bus, first Serial port, first SPI bus, 10 analog input pins, pins 0..23 as digitial pins) then it should work fine.
If you want to do stuff with...
It really depends on how powerful the LEDs are. For just 2 LEDs that don't have to be excessively bright, you are likely over-thinking things. The simplest thing is to get two LEDs with resistors attached, and hook...
Note, if you do that you may/may not have some issues. The Adafruit Neopixel Uberguide Best Practices covers a lot of cases. The guide is perhaps getting a little old, but it pulls together some of the issues. In...
It depends on the LEDs. If the LED can be driven by 3.3v power and it includes a resistor to regulate the power to the LED, then you can hook up the LED directly (LED plus to a data pin, LED minus to ground).
If...
Yep. I can confirm that. The M2 screws I bought from the hardware store fit fine. But I will need to look around for much smaller M2 screws (h/w store only had 12m long screws, and I want something much shorter to...
Well I can imagine that for larger screens, particularly where the screen actually has more pixels. Something has to interpolate the image at one resolution to display it at another (and at times, you might have...
Speaking of uncanny eyes, has anybody tried uncannyEyes_async_st7789_240x240.ino recently? Now that I have the GC9A01A_t3n display running, I decided to bring my old Teensy 4.0 that was setup to use the 240x240 square...
Yes.
The uint<size>_t and int<size>_t cannot be used with the scanf and printf % formats. The scanf/printf formats can only handle standard types. The <size> types are mapped into the appropriate standard type,...
In particular, with regard to just the SD drive and flash memory if you've soldered it on, the 3.x Teensys needed to use the alternate SPI ports because the I2S ports for the audio stuff overlapped with some of the SPI...
In terms of the clear display, I don't have one. And the mono OLED is fairly small.
FWIW, I've been playing with adjusting the defaults.
I disabled the right eye (so I could check the results of moving the D/C...
The special CS and D/C pins used to optimize the SPI touch screen on the Teensy 3.x processors don't have the same optimization on the Teensy 4.x. The display should still work, it just might be slightly slower (but...
Hmmmm, yeah that might get freaky. Plus I assume it would get quickly into feature overload mode. I would imagine with a PI, you might be able to take input from the camera, and clip it to the current iris size and...
It depends on what you are doing. If you only use the first serial port, use SPI port without using the alternate pins, normal I2C, don't use the DAC (A14) don't use the inner analog pins (AREF, A10, A11) then things...
FWIW, the capability I've thought was really cool was on the Monster M4SK, which is a pair of 240x240 displays.
When I plug in the M4SK, it provides the flash as a removable disk as well as doing the eye patterns. I...
Ok, I mis-read the #ifdefs and for the second (right) eye, I was using the Teensy 3.5/3.6 defaults instead of the Teensy 4.1 defaults. I suspected that was probably the case
Mine was from Waveshare, which makes many of these displays. But I would imagine over time there will be other clones made of the display.
Yeah, mine seemed to want to always flop down on to the desk. For desk...
Yep, as I thought I had the wiring wrong (I believe I forgot to add an extra pin to account for the ground pin). I got the first eye doing the graphicstest, and one or two of the other demos. Then I re-ran uncanny...
I got my GC9A01A's in the mail. But they don't work with uncanny Eyes. I'll look at them tomorrow after work (probably wiring issue, and I mis-counted the pins). Should the backlight be attached to ground, 3.3v, or...
Cool. Thanks. Mine should be here on Tuesday (Monday is a USA holiday). One issue with the traditional two displays was hiding the extra bulk of the corners of the display if you were thinking about embedding it in a...
To be sure, for I2C you need a bi-directional voltage translator to handle I2C. I.e. you have to boost the signals from the Teensy from 3.3v to 5v, and you need to lower the signal from the I2C devices to the Teensy...
Here is the paper that describes tri-stating (as well as using pull-up resistors on the CS pins, and making sure your libraries use transactions):
https://www.pjrc.com/better-spi-bus-design-in-3-steps/
It's been awhile since I played with ST7789 displays. Refresh my memory which pins should be used for the CS and D/C pins on the Teensy 4.0/4.1 for fastest frame rate.
From the pinout card, it looks like pins 10,...
I hadn't noticed that, but given the parts shortage, I can imagine offering a version without the ethernet phy.
And if your SMT soldering skills are rusty or non-existant, you can get pre-soldered versions of the...
Be sure to check underneath the Teensy, as several of the Teensies have protrusions on the bottom. Some of the PCB boards that I've seen that were meant to be soldered directly tended to have cutouts for the bumps and...
Good work. I've wondering about these displays, and of course whether I could adapt the uncanny eyes code. In theory, I imagine it should just 'work' providing the eye drawn is within the circle of LEDs that are...
There are voltage level converters that can handle bi-directional conversion issues for I2C (RX/TX are unidirectional, so they should work ok with just about any logic level shifter). These are available at various...
You can also use the micro SD card solder pads underneath the Teensy 4.0. Back before the Teensy 4.1 came out, various people were soldering flexible cables to attach the SD card reader, and there were some PCBs that...
Others can give you more detailed information about this.
In almost all of the time, this is caused by code that waits for the Serial USB line to be initialized. Given you are being run off of battery, it never...
I am a computer programmer that has worked on compilers for over 33 years. I have been working on the GNU GCC compiler for over 20. Outside of work, I tend to be known for my steampunk camera (see http://www.steampunkmike.org for more details).
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