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#ifndef C1224_DISPLAY_H
#define C1224_DISPLAY_H
#include <stdbool.h>
/**
* I2C HD44780 via PCF8574 backpack (0x27/0x3F). USB always logs.
* Shows Power/ready, Signal, Packet from INI texts.
*/
void display_init(void);
bool display_present(void);
/** Refresh LCD from current status + sense (uses INI texts). */
void display_update(void);
/** Legacy single-line push (also used before full UI ready). */
void display_show(const char *line);
#endif
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