Shit - this file is loaded into Arduino.h. It's simple, isn't it? Define symbols before loading HardwareSerial.h. # if !defined(SERIAL_TX_BUFFER_SIZE) # if ((RAMEND - RAMSTART) < 1023) # define SERIAL_TX_BUFFER_SIZE 16 # else # define SERIAL_TX_BUFFER_SIZE 64 # endif # endif # if !defined(SERIAL_RX_BUFFER_SIZE) # if ((RAMEND - RAMSTART) < 1023) # define SERIAL_RX_BUFFER_SIZE 16 # else # define SERIAL_RX_BUFFER_SIZE 64 # endif # endif By default, if nothing is configured, you will get values based on the amount of available RAM: The serial port libraries are configured with #define statements so you can correct the buffer size. The situation required Might圜ore, so I used it. However, the Arduino IDE does not directly support ATMega32A, so you have to install a toolbox to do this. It provides clock speed, serial port, storage, etc. The small computer project uses a real Z80 chip and an ATMega32A for almost all auxiliary functions. On the other hand, it is very difficult, because your tools are trying very hard to help you. How difficult can it be to update a buffer? On the other hand, this is a trivial task. Everything seemed to work with the default 64-byte buffer, but XModem is sending more data and it's easy to imagine the buffer overflowing. As a result, the Arduino serial port buffer was not large enough for transmission through XModem to be considered reliable. All the details are in the discussion on Hackaday.io if you really need it. I will not bother you with details on how to make the board work, as you will only be interested if you have one. Problem: Arduino serial port buffer size limit This trick is worth learning as it can be useful outside of this particular task. As a result, I came up with a way to add my own menu items to the Arduino IDE in order to edit the compiler settings depending on the hardware used in the project. ![]() I wanted something better and ended up in a rabbit hole on Saturday morning. It seemed like the best thing to do was to make Intel hex files and copy / paste them through the terminal. The only problem with the project was the lack of good options for transferring data from it to the PC and vice versa. But I finally found the time to finish the project and downloaded CP / M. I received it, and - as you may have guessed - it still lay a little half-disassembled. For a while, everything was in a half-disassembled state, and then they sent me a payment for him. I rarely have time to build what I'm writing about, but I really wanted to try building this little computer. I once wrote about a $ 4 Z80 based computer. However you set up your own IDE, as soon as your code goes online, someone will try to use it with the IDE. However, if you do something that others will use, it is almost impossible to ignore. On the other hand, I was impressed with how flexible it is when you dig into the details of its internal structure.įirst, you are probably asking why I am using an IDE. On the one hand, I despise this nondescript editor for hiding too much from me and providing very few useful tools. This experience left me with a double impression. In the end, I came up with a solution that can help you with other problems as well - so even if you don't specifically need this feature, you might find it helpful to see what exactly I did. And I only appreciated its full extent the day before, when I wanted to do something very simple: increase the receive buffer of the ATmega32 serial port. However, from the original IDE I always get heartburn. ![]() Yes, today we already have more options - for example, pro IDE and Platform IO. I'm not a huge fan of Arduino infrastructure.
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