FWIW, here are coremarkish numbers for T3.6 with Faster optimization. The 240mhz and 256 mhz were done today, the other data points are from 2016.
from earlier post
I'm not sure there is a "best" value for OSC0_CR as the crystal characteristics will vary from chip to chip and temperature will alter the crystal frequency. Testing one of my T3.6 with GPS PPS, the best OSC0_CR is the...
there are examples, in the IDE select File > Examples > Audio > SamplePlayer
You should watch the audio tutorial https://www.pjrc.com/teensy/td_libs_Audio.html
and read the audio workshop manual...
The example in https://github.com/stevemarple/IniFile works for me on T3.6. I copied net.ini to the microSD card, then on the T3.6 i ran SD example, File > Examples >SD > listfiles with const int chipSelect =...
i'm pretty sure i've used the library with Teensy 3.2 and adafruit OLED, try the example and pin wiring in
https://github.com/adafruit/Adafruit_SSD1306/blob/master/examples/ssd1306_128x64_spi/ssd1306_128x64_spi.ino
maybe look at his library https://github.com/adafruit/Adafruit_SSD1306, has examples. you need to configure for 128x64
and this similar display https://www.adafruit.com/product/661 (describes pin outs etc)
What signal do you have hooked to pin 6?
I added to tone(23,1024); to the end of setup() in your sketch, and jumpered pin 23 to pin 6, and your sketch worked for me
FreqMeasureMulti Begin
(no pulses),
1022.76, ...
Since DACs are also analog pins (A21, A22), the ADC library initializations might conflict with Audio lib DAC ... more study required.
can you use the Teensy analogRead()? That might avoid a conflict. a simple...
as the forum rule states, please provide a runnable sketch that demonstrates the problem. You can't use analogRead() with Audio lib's AudioInputAnalog,
see https://www.pjrc.com/teensy/gui/?info=AudioInputAnalog
Sounds like you might have multiple copies of Arduino installed and/or multiple copies of the Teensy SD library (in your sketchbook/libraries and in core install folders or ??). You could use explorer to search for...
write() just expects an address and number of bytes, a snippet to write floats might look like
...
// check if this file is already on the Flash chip
if (SerialFlash.exists(filename)) {
...
The source code for analogWrite() is in hardware/teensy/avr/cores/teensy3/pins_teensy.c
https://github.com/PaulStoffregen/cores/blob/master/teensy3/pins_teensy.c
For the T3.2 you will see
#define FTM0_CH0_PIN...
Why did you start another thread on your keypad??? you already had an active thread
https://forum.pjrc.com/threads/53797-teensy-lc-not-giving-result-according-sketch-using-keypad-library
you might check the...
the I2cMaster lib is 8-bit AVR specific. In the MLX90615 library you should replace the software I2C with hardware I2c, e.g. teensy Wire.h
you should google and see if someone else has already done a hardware I2C...
try using FastLED.addLeds<DOTSTAR, RGB>(leds, NUM_LEDS);
which uses pin 11 (MOSI) for data, and pin 13 for CLK. these are the SPI pins and permits FastLED speed optimizations
Your first sketch uses 6x9 matrix, and your second sketch uses 6x7. Maybe try running the first sketch with the 6x7 matrix to see if that changes numbers for each key on the pad. Or use the 6x9 matrix and pins in the...
try using Adafruit's library for the PFC8523
https://learn.adafruit.com/adafruit-pcf8523-real-time-clock/rtc-with-arduino
https://github.com/adafruit/RTClib
Well, this thread is about TweetNaCl and not CryptoAccel, but whatever. In 2017, we found renaming .s files to .S got Paul's CryptoAccel to build under windows 10. See...
oooops, you forgot to init the SD, after delay(10); add
if (!(SD.begin(SDCARD_CS_PIN))) {
while (1) {
Serial.println("Unable to access the SD card");
delay(500);
}
}
your sketch works...
Maybe try uploading and running a sketch that uses Serial.print(), the blink sketch does not use the USB serial.
also "Port: /dev/bus/usb/001/023" shows up if Teensy is in HID mode (program mode)
you can build a HEX file on your IDE and email it to your friend. He can use command-line loader, see
https://www.pjrc.com/teensy/loader_cli.html
google "teensy hex loader" and you may find other threads, e.g....
This is a Teensy forum, which Teensy are you planning on using? The Adafruit chronodot (I2C) has a product page describing various libraries and examples that support alarm functions, see ...
if you look at my hex dump, the first command line is 64 bytes long. The FIX is in CmdMessenger.h change
#define MESSENGERBUFFERSIZE 64
to
#define MESSENGERBUFFERSIZE 128
When 44's are sent, the read doesn't complete, nothing printed ??
i fear the problem is with python version it probably needs to "escape" separator bytes in the binary data stream. you could just send ascii/string...
Alas, even with proper byte sizes, i experienced the same failures for data values 44,44, ..., using ubuntu python3 ... seems like a bug in the library for binary data.???
i added an OLED display to T3.6 to examine...
I think it might be related to having the wrong size for int's (needs to be 4 for Teensy 3), but python is configured to send 8 bytes, so teensy reads 4 binary bytes, then starts looking for separator, and it finds the...
Can you try the example https://github.com/harmsm/PyCmdMessenger/tree/master/examples/arduino
Example worked for me with Teensy 3.6 and Mac python3 using
#...
it may not help, but for the Teensy 3.6 i would change
arduino = PyCmdMessenger.ArduinoBoard("/dev/cu.usbmodem3071981",baud_rate=115200,int_bytes=8, long_bytes=8, float_bytes=8, double_bytes=8)
to
arduino =...
the adafruit neopixel library uses the ARM cycle counter (calibrated by F_CPU) to produce delays for the 800Khz signal used to control the LEDs, I guess running the CPU too slow disrupts the 800khz signal ... glad it's...
Re: alternative to save the measurement
There are several threads on this forum discussing high speed logging to the T3.6 microSD card, e.g.
https://forum.pjrc.com/threads/45993-Teensy-3-6-ADC-DMA-Question
actually, i think the semantics requires that you check if conversion is ready
void loop() {
elapsedMicros elapsed;
uint32_t cnt = 0;
while (elapsed <= 1000000)
{
if (adc->isComplete(ADC_0)) {
...
maybe you are measuring the speed of Serial.print(), try
void loop() {
elapsedMicros elapsed;
uint32_t cnt = 0;
while (elapsed <= 1000000)
{
value = (uint16_t)adc->analogReadContinuous(ADC_0); // the...
take a look at the library example analogContinuousRead, in the sketch are comments describing expected performance
https://github.com/pedvide/ADC/blob/master/examples/analogContinuousRead/analogContinuousRead.ino
...
some LED strips require that the data control pin voltage be no less than 0.7*Vcc (LED voltage). I didn't see the datasheet for your SK6812, but you might try a levelshifter for the Teensy 3.2 to bring that data pin up...
In the spirit of the LC hack in post #5, here is a Teensy 3.6 sketch using PWM pin 3 (FTM1 CH0) jumpered to pin 11 that changes the frequency and duty cycle every 4 periods. Start PWM with 1.3hz so core configures...
You can Serial.println(MCG_C1,HEX); and see the register holds 0x20. So Teensy is using external oscillator (16 mhz) divided by 512 = 31250 hz
set in hardware/teensy/avr/cores/teensy3/mk20dx128.c
MCG_C1 =...
you might change duty first (analogWrite) then analgWriteFrequency(), since analogWriteFrequency stops AND starts the timer... on second thought that probably won't work, the analogWrite will set the duty based on ...
You should test with scope or analyzer. Hack should apply to all Teensy 3* creatures. My experience is that duty/frequency change takes place on next PWM cycle, see analyzer image in...
I'm not sure i understand your question. Your first sketch produces the lines you list before the sketch in the post. And i presume that first sketch is doing what you want -- yes?
Your 2nd sketch only print's once...
The sketch compiles fine for UNO or DUE or dragonfly ..., so it seems to be a Teensyduino problem.
And if you try to use Serial.print(x,BYTE) on UNO you get an error
scopetest:51: error: The 'BYTE' keyword is no...
I experienced a similar conflict with the BYTE define in teensy3/Print.h, see
https://forum.pjrc.com/threads/28505-Can-t-get-files-on-SPI-flash?p=182121&viewfull=1#post182121
Maybe in library src/LiquidMenu.h ...
Find latest posts