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Used for communication between the Arduino board and a computer or other devices. All Arduino boards have at least one serial port (also known as a UART or USART. Arduino Delphi Serial Communications Program When is each one used? Why do we need more than one kind of hardware flow control? Getting Started with LattePanda.

Arduino and Delphi Controlling Outputs with the PC Controlling Arduino Outputs with the PC Elsewhere on my website, I show details of a which can be controlled using the computer's parallel port. Unfortunately, fewer PCs are fitted with parallel pors these days and, for a laptop, it's not really an option. A recent failure of the PC I used to operate the Video Switcher meant I needed to find an alternative to the parallel port. Although the software I ran on the PC to control the Video Switcher is beyond the scope of this article, I needed to update it to use USB instead of the parallel port.

I had in mind something similar to the but without any inputs or LEDs or buffering or Analogue IO. The original Video Switcher design only needed three data output lines from the PC's parallel port to selelct the cameras, so this seemed like a good opportunity to bring together a few bits and pieces and 'concepts' that I'd been thinking about for the Arduino; specifically: • To build a 'minimal' stand-alone Arduino on its own PCB (. • To interface the 'DIY' Arduino with either a or a -- or even try both! • To write a simple Windows application (in Delphi) to control the 'Arduino' digital output pins, similar to the application supplied with the Velleman USB Interface. As this will be using the existing Arduino IDE's Virtual COM port, it should be much easier to write than grappling with the Velleman K8055 DLL methods and procedures!

• Ultimately (outside the scope of this article) to incorporate what I learn into the to act as a 'bridge' between USB and the original parallel port input. The Delphi application I wrote to test the PC-to-Arduino communication is very simple.

Six checkboxes are used to turn an Arduino digital pin HIGH or LOW. The actual digital pins are determined by the Arduino sketch but the Delphi application assumes digital pins 8 to 13. Contoh Soal Integral Partial Dan Pembahasannya Pdf Free more. These are all but the top two bits of the ATmega's PORT B - the top two bits being unavailable because the chips's hardware design uses those two bits (which would be Arduino digital pins 14 and 15) for the 16 MHz crystal. The Delphi software simply calculates the decimal number based on which checkboxes are checked and sends the number as a text string to the USB port - which the Arduino & IDE has already configured as a Virtual COM Port (VCP).

Delphi doesn't have any native COM port functions or procedures and Delphi programmers will have their preferred software or 3rd Party component so I won't give the code here. I use the TComPort Library available. It should be easy enough to write to individual Arduino digital pins rather than addressing an entire port but, in order to do this, the PC application would need a 'pin map' of the Arduino and would need to take care to read the port to which the digital pin belongs and logical OR it with the idividual digital pin's bit in order not to change the state of any of the other bits before writing to the port. For simplicity, that's not the approach I used with this current application.