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Printer (printer)

Printer.

Device Type​

DEVICE_TYPE_PRINTER

Structure​

struct printer_t {
    char * name;
    int (*print)(struct printer_t * printer, uint8_t * buf, int64_t len);
    int (*feed)(struct printer_t * printer, int lines);
    int (*cut)(struct printer_t * printer);
    int (*standby)(struct printer_t * printer, int ms);
    int (*ioctl)(struct printer_t * printer, const char * cmd, void * arg);
    void * priv;
};

Key API​

FunctionDescription
search_printer(name)Find printer by name
register_printer(printer, drv)Register printer
unregister_printer(printer)Unregister printer
printer_print(raw, len)Print raw data
printer_feed(lines)Feed paper
printer_cut()Cut paper
printer_print_text/surface/qrcode()Advanced printing functions

Description​

Thermal/receipt printer interface. Supports raw data printing, paper feeding, and paper cutting. Includes advanced print helpers: formatted text, QR codes, image printing, and surface rendering. Async variants support non-blocking printing.