Linked Questions
                        12 questions linked to/from Adding a custom board to the Arduino IDE
                    
                
            
            
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        How to change the default SPI pin used in SPI and Ethernet library [duplicate]
                    Hello i have a custom board of the RP2040 and would like to use the ethernet library. But the ethernet example webClient uses the default SPI pins of whatever board it is being used, but what if im ...
                
            
       
        
            
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        Porting Arduino for ATMEGA16U2 [duplicate]
                    I have a bunch of ATMEGA16U2 in my drawer and I need to make a small production of custom boards with Arduino-based firmware.
After a Google search I learn the ATMEGA16U2 is often hosted on the ...
                
            
       
        
            
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        upload.tool not used in custom boards.txt?
                    I've created a custom board in boards.txt and changed the upload.tool to a nonsense value, and yet when I do an upload the IDE still calls avrdude.
For example, In boards.txt I've changed the line...
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        Will the Duemilanove bootloader work in the Uno?
                    Similar to Will the Uno bootloader work in the Duemilanove? but the other way around.
I have an Arduino Uno. I require a slower upload speed than the 115200 baud rate used in the Uno's Optiboot ...
                
            
       
        
            
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        Accessing Physical Pins in Arduino Due from Arduino IDE
                    It is possible to access the Physical Pin 93, Pin PC11 on ATSAM3X8E in Arduino Due  from the Arduino IDE?
I am programming a Barebone ATSAM3X8E, and it do not seems to be allocated by Arduino Due nor ...
                
            
       
        
            
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        Program ATTiny85 running at 16 KILOhertz
                    I set the fuses of my attiny85 so it uses the internal 128khz clock, prescaled so it is 16kHz.
I set the CKOUT fuse too so I can check the clock using an oscilloscope on pin 3 and yes it is 16kHz.
Now ...
                
            
       
        
            
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        Is it possible to use the Arduino Due's specials pins for digital writing and reading?
                    Hello the arduino documentation on the due specifies the pin mapping of the pins.I am making a custom board using the dues schematics and i am running still a bit low on pins. Also some of the special ...
                
            
       
        
            
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        Adafruit/Arduino SAMD BSP package and adding SAME51 compatibilty
                    I am trying to make a SAME51 variant of an arduino board, in the end I would like to have an arduino compatible board, BSP, and library for controlling canbus.
I have already gone through some things, ...
                
            
       
        
            
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        How to modify an Arduino Due native USB port VID and PID?
                    I would like to know if it is possible to modify the VID and PID of the Native USB port of an Arduino Due.
                
            
       
        
            
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        Arduino Due custom platform for school and library installation
                    I have made a custom-development hardware for our school, where you can plug in an Arduino Due. It is mainly for driving all kind of motors and reading sensor signals. Therefore I added a custom SAM ...
                
            
       
        
            
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        pin numbering for non-standard chips
                    so i replaced the mainboard in (what was) an anet a8 3d printer with a proper RAMPS setup. there was nothing wrong with it, (or at least it wasnt damaged, there are a number of severe design flaws) so ...
                
            
       
        
            
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        Arduino core libraries
                    We have worked with a company to design a custom board based on the Arduino Zero and have also had them do some programming for us.
In doing so, they have had to modify the following Arduino core ...