Trouble with static buffer sizes within the RingBuffer libray

(Arduino 1.6.18.1)

- Serial communication:

If serial data are read and the attached device does not support any flow control (like most devices that you can buy) the CPU must be in receive mode all over the time. The data received are buffered in a static preallocated 128 byte buffer SAM) within the Arduino library.

The user application must periodical check if there are data and read them and must do it fast enough, before buffer overflow.

If you do for example SD-card-i/o, the SD-card may awake from sleep mode and that cost a few 100ms, you can quickly get an overflow of the serial buffer.

The only chance to overcome this situation is to align the serial buffer size to your application. If there is no flow control on receive, one cannot use a fixed size for all projects.

Please implement a simple method, that the user can set the size of the buffer from within the project (AVR, SAM, and SAMD(?)).

Currently one must modify (SAM): "Ringbuffer.h" => "#define SERIAL_BUFFER_SIZE xxxxx".

(This topic is currently in discussion within the Arduino group.)

Inizia da Ringbuffer.h e dalla definizione SERIAL_BUFFER_SIZE menzionata nell’issue, quindi confronta il modo in cui la libreria Arduino gestisce il buffer per AVR, SAM e SAMD. Definisci come un progetto debba impostare la dimensione senza modificare la libreria e verifica che la dimensione scelta venga rispettata sulle piattaforme interessate.

Scritto dal modello di indicizzazione a partire dal testo della issue.