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Thanks KurtE, I would be happy to use the interface that's intended for connection to the optional QSPI memory chip on the T4.1. I would plan to gain access to it by soldering a custom breakout board to those pads, hence I don't necessarily need access to other hardware that may be on the MCU...

Okay, so I'm guessing that likely means that the hardware assisted single/standard SPI transfers will likely be much faster than any software implementation of Dual/Quad SPI? It seems strange that they have QSPI capabilities on the FT81X when it's focused at the MCU market if hardware to control...

Hi there, I'm wondering if anybody has come across any Quad SPI libraries that could be used as examples or used directly. I'm communicating with and one of Bridgetech's FT813 TFT displays and I use the standard single channel mode with MOSI as input from the master andMISO as output to the...

Hello again, Sorry about this inquiry. Looked through it again, tracing my way through the libraries and I found that I was trying to set the SRE bit in the wrong place in the code. The pins and SPI settings are indeed setup directly in the SPI.cpp file at lines 289-301. When I inserted...

Hi Paul/All, I've been playing around with what was suggested in another forum topic here to enable/disable the slew rate on digital pins of a Teensy 3.6 and I can easily do this in a sketch by simply changing the SRE bit in the port configuration register after my call to pinMode as shown here...

Hi Paul / All, I've been playing around with what was suggested above to enable/disable the slew rate on digital pins of a Teensy 3.6. I can easily do this in a sketch by simply changing the port configuration register after my call to pinMode as follows to enable/disable the feature: void...

Replying to my own thread, as I found the cause of the issue I raised! The cipher mode used by AES encryption using CryptoAccel library appear to be Electronic Codebook (ECB) and the output corresponds just fine with that produced via the .NET encryption process. The problem I was having was...

Quick question, after playing around with the CryptoAccel library, I found that it utilizes the ECB cipher mode. This mode is known to have some security issues if repetitive text blocks are being encrypted. Does anybody know if CBC cipher mode can be implemented with this library to enhance...

Hi, I would very much appreciate any help or guidance anyone can bring to bear on getting a better understanding of how Paul's CryptoAccel library works and how to use it for the purposes of encrypting data which was not encrypted using the same library. There isn't any underlying C code for...

Thanks very much for your prompt responses on this matter. If I understand correctly, you're both saying that all USB serial communications to the Teensy 3.6 are in fact validated between source and receiver at the hardware level. If so, the issue must be due to the way my application on PC and...

Hi, Could someone please comment on whether or not the teensy usb driver in Win7/10 does a CRC check on the validity of data transmitted to/from a Teensy 3.6 via USB serial. I suspect it does not as sometimes when transferring data (typically transferring relatively small image files to/from an...

Hi, I had trouble with the above method of detecting the presence of the SD card also so I reverted to the less desirable method of polling. However as I primarily use capacitive touch TFT's, I also have to poll a register to see if there has been a user interaction, so as part of this this...

Hi all, I'm trying to build a small control system using Teensy 3.6 with TFT, alongside a number of other micro-controllers connected via UART's and I2C comms, and a number of peripheral motors, etc. I made a link-up PCB (like a motherboard I suppose) to connect all these components together...

In addition to my message above, I should also mention that I am just looking to output a mono audio signal using the DAC0 channel on the Teensy 3.6 or Teensy 3.2, it that makes things any easier. I also don't have any requirement to mix or analyse any audio signals so just read from file on sd...

Hi Paul/Others, I'm aware that this is a relatively old thread but I'm also very curious about whether I could potentially alter your PJRC audio library to utilize Bill Greiman's current SdFat library. I've been using this library for quiet a while now and have a good number of projects...

Thanks Paul and Frank, Firstly, I just wanted to say that while this is my first time posting here I've followed 100's of your discussions on forums over the past year/two since I got my first micro-controller and have always found them a great inspiration as well as being a very helpful guide...

Hi, I just found this very useful thread, could you please give a little further information as to what part/where in the SDFat library I can find the DAT3 configuration you've noted above, I'd really like to include this in my project. Should I be editing the SDFat library to implement this...

Hi, I cannot find any information for detecting the presence of an SD card for T3.6's built-in Sdio card slot. I'm aware this can be done with may of the spi card reader modules but I need the additional speed provided by the builtin sd card. Does anybody know if this is directly wired to any...