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Shift register buttons question

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Can LCD shift registers keep up with faster MCUs?
This commit is contained in:
Scott Lahteine 2017-11-21 00:20:01 -06:00
parent 3994d3b935
commit 56c02b7f59
1 changed files with 7 additions and 5 deletions
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12
Marlin/src/lcd/ultralcd.cpp
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@ -4931,7 +4931,7 @@ void lcd_reset_alert_level() { lcd_status_message_level = 0; }
#define encrot3 1 #define encrot3 1
#endif #endif
#define GET_BUTTON_STATES(DST) \ #define GET_SHIFT_BUTTON_STATES(DST) \
uint8_t new_##DST = 0; \ uint8_t new_##DST = 0; \
WRITE(SHIFT_LD, LOW); \ WRITE(SHIFT_LD, LOW); \
WRITE(SHIFT_LD, HIGH); \ WRITE(SHIFT_LD, HIGH); \
@ -5033,13 +5033,15 @@ void lcd_reset_alert_level() { lcd_status_message_level = 0; }
#elif ENABLED(REPRAPWORLD_KEYPAD) #elif ENABLED(REPRAPWORLD_KEYPAD)
GET_BUTTON_STATES(buttons_reprapworld_keypad); GET_SHIFT_BUTTON_STATES(buttons_reprapworld_keypad);
#endif #endif
#else #else // !NEWPANEL
GET_BUTTON_STATES(buttons);
#endif // !NEWPANEL GET_SHIFT_BUTTON_STATES(buttons);
#endif
} // next_button_update_ms } // next_button_update_ms