![]() And of course you need a Cypress chip programmer which is about 20 bucks. This might be an advantage to you (if you need the Serial, or want to change fuses) or it might not.Īlso, Cypress provides some software libraries so the chip can easily mimic usb HUD devices (keyboard, mouse, gamepad).īut if you do want to hack the Cypress chip (you could just load my stuff on), be forewarned - it doesn't have easy libraries like Arduino and a huge forum! Its "real" embedded programming. The USB serial software I wrote actually talks to the AVR using SPI not UART serial - it essentially converts the USB CDC-ACM protocol coming from your computer into SPI.Īnd although it "looks" (to the Arduino IDE) just like an AVR bootloader, it actually programs the AVR directly as if you were using a device programmer. As far as other hardware on the Mega goes, it also touts four serial ports for general attachments, a USB connection (with a dedicated ATmega16U2 processor for interfacing with your computer), a reset button and a power supply port. The entire thing, including micro-USB port, fits in a PCB area about the size of your thumbnail, with all components on just one side. See the graphic below for a (dare I say) mega-map of the Mega’s pins. To work with the serial interface use the Serial library methods. Pins 0(RX) and 1(TX) are connected to the corresponding pins of the ATmega16U2 microcontroller, which acts as a USB-UART converter. connect Rx to Rx connect Tx to Tx Vcc to Vcc. Its tiny, uses simple hardware (if you can do SMT work) and cheap. It is used to communicate the Arduino board with a computer or other devices over a serial interface. How to Use Arduino As USB to TTL (Serial) Converter Easy Tutorial. You could use my solution based on a Cypress chip detailed in the open hardware journal Bruce Perens site place-holder – This site will be developed. looks like the FT232RL chip would be perfect for me? I noticed SparkFun sells a breakout board for it, I assume I can follow their schematic ( ) and integrate it directly into my project instead of using a breakout board? I would like to connect the ATMEGA2560 via USB internal header pins on a computers motherboard to allow USB to serial communication with the ATMEGA2560. From my research, I assume that I need a FTDI chip?īasically, I need help on what hardware component(s) do I need that would be the simplest and best solution to this project. This would not be on the development board but rather it's own board which means I don't already have a USB communication chip. I already know what to do from the programming/C# side of things, not the selection of how to create the USB to serial communication. I have found and reviewed guides online, but, they assumed I was using the actual Arduino Mega 2560 development board. I'm working on a new project that requires communication from Windows via a C# program to the ATMEGA2560.
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