![]() Support for Windows, Mac, and Linux platforms.Support for hardware flow control and hardware handshaking. ![]() Support for multiple simultaneous connections.Automation of serial port communication with scripting and OLE Automation support.Support for user-defined control sequences and macros.Ability to connect to remote serial ports over a network.Support for multiple connection types, including telnet and SSH.Ability to save and load settings for easy port configuration.Logging of sent and received data for debugging and analysis.Text search and filter options to quickly find the data you need.Send and receive data in both ASCII and Hexadecimal formats.Support for multiple serial ports, with support for USB-to-Serial adapters.Easy to use graphical user interface, with no code required.Using CoolTerm allows users to easily connect, monitor and control serial port devices. With its intuitive design and powerful features, CoolTerm is the perfect tool for any serial port needs, from debugging hardware to sending and receiving data from embedded systems. It provides a easy-to-use graphical interface for serial port communication, allowing users to quickly connect, send and receive serial data, and log data. What is about Ethernet ? Is the etnernet driver of the Teensy 4.1.CoolTerm is a simple, straightforward serial port terminal application for Mac, Windows, and Linux. To be honest, I am open to the communication between Teensy 4.1 and the computer for transmitting the sampled data. Without evaluating the speed of Serial USB, I guess that sending each sample will destroy the performance. The samplerate of the ADC is about 52kHz resp. However, now I try to find a way to send those samples "fastly" to the computer to save them. I will share this minimal example in one of my other posts. By the way: I wrote a minimal example to start SPI DMA transaction via external GPIO interrupt using XBAR. When all for channels are sampled, the ADC triggers the DRDY line, which I use to start the SPI transaction on Teensy4.1. The ADC got 4 channels which are sampled simultaneous and are available on the DOUT in a serialized format: a 96 bit stream for all 4 channels. I just want to share my intention here shortly: My aim is to access an external 24Bit Analog Digital Converter which provides a simple SPI interface: SCLK, DRDY and DOUT only. Thank you ! Things getting more clear to me. Then you might consider how that compares with the expected data rate you'll get from a SPI chip. Don't forget to convert lines to bytes if you want to know the actual overall banwidth. ![]() This can give you a pretty good idea of how USB serial works when used in the ordinary Serial.print() way. You'll see the nature of the software on the PC receiving the data has a huge effect on the overall speed. Also in Arduino, try the "Teensy port" (which uses optimized code on the Arduino side) versus "Serial port" (uses the original Java code Arduino provides). Maybe also try opening the port with non-Arduino software like CoolTerm (Windows, Mac) or seyon (Linux) to see how things compare with Arduino. If you have access to different operating systems, you might try it on each to see how the speed differs. If you did mange to do so, I would imagine you'd be very unlikely to achieve anything as good as going through memory.īefore you dive into the complex low-level details, I'd suggest first running this very simple benchmark. I don't want to say it's technically impossible, as there might be some highly improbable way. So the complex answer is the hardware just isn't meant to do DMA directly from SPI to USB without going through memory, as it's not even the same type of DMA. To go from SPI to USB, you would have SPI write to buffers in memory, then have USB transmit from those buffers. The normal way things work is between peripheral and memory. So that's 3 different DMA controllers, all very different from each other. LPSPI doesn't have its own DMA built in, but it can be used with the general purpose DMA controller. FlexSPI also has its own bus master DMA built in. Or DMA controllers (plural), as USB has its own bus master DMA built in and there are 2 completely different types of SPI hardware, called LPSPI and FlexSPI. The simple answer is no, that's not how the DMA controller works. It is possible to redirect the data from the Rx FiFo of the SPI to the USB Serial TX using DMA?
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