There is one for Windows only that includes a full toolchain (Linux and Mac users can use it in a virtual machine), there are two others for Windows, Linux and OSX that do not need a toolchain (use these if you can). The Boards Packages can be downloaded from the Elektor.Labs space at GitHub. There are (unfortunately) several Boards Packages. More details about the IDE integration can be found in the Elektor Magazine article published in June 2016. Also the SPI and Wire libraries had to be modified to support multiple peripherals. How to do this properly is unfortunately not very well documented, making this a complicated task. Because the Arduino IDE does not know about the ATmega328PB I had to build a Boards Package that provides the toolchain. Check the datasheet for details.ĭrawing up the schematic was easy enough, the hard work is in the software. There are some more differences, like the touch controller. Here is a table that shows the main differences between the R3 and the R4. The power supply is a bit stronger than on the Uno and of course we provided four extra connector pins to accomodate Port E of the ATmega328PB. This saves on firmware/driver maintenance & device programming. One of the main differences is the USB-to-serial converter for which I used an FTDI chip instead of another AVR. The circuit of the R4 is pretty close to the Uno. Because it is backwards compatible you can think of it as revision 4 of the Uno, which is why we called it the R4. Identical form factor as the Uno but based on the ATmega328PB-AU, this board has much more features than the Uno. This board is an evolution of the Arduino Uno R3 board. However, our Arduino add-on inserts a new entry in the Programmer menu, STK500 for Pololu A-Star 328PB, which you can select when using the Pololu USB AVR Programmer v2.1 (or another STK500-compatible AVR ISP programmer) for in-system programming of the A-Star 328PB.The Elektor Uno R4 is an Arduino Uno R3 equiped with the ATmega328PB-AU featuring 2x USART, 2x I2C and 2x SPI and much more. If you want to program the A-Star 328PB with this method, you will not be able to use the default programmers listed under the Tools > Programmer menu, since the software toolchain used with these programmers does not recognize the ATmega328PB. This is done by selecting the Upload Using Programmer command in the Sketch menu. The Arduino IDE provides the ability to upload a sketch to a board using AVR in-system programming (with a programmer connected to the 2×3 ISP header). For example: digitalWrite(SDA1, HIGH) “Upload Using Programmer” These pins do not yet have official pin numbers in the Arduino environment, so if you need to use their pin numbers in your code, we recommend using the constants SDA1 (for PE0) and SCL1 (for PE1) that are defined in our header files (instead of using the pin numbers 22 and 23 that we have provisionally assigned). The ATmega328PB has two new pins, PE0 and PE1, that have no equivalent on the ATmega328P.
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