Hi Matt Thanks for your clear answer. I'll get started on it this week.
Regards, Peet Op donderdag 22 januari 2026 om 01:13:21 UTC+1 schreef Matthew Schinkel: > > 1) 4 digits, but “2+2 independent”? > Yes, but not with seven_segment_multiplexer = value / put(word), because > that only formats one number across all digits. To do 2+2, you must set the > digit buffer per position (each digit is updated independently by the ISR). > > -- up: 0..99 (displayed on digits 1..0) > -- down: 0..99 (displayed on digits 3..2) > var byte up = 23 > var byte down = 99 > > procedure display_update_2plus2() is > var byte tens > var byte ones > > tens = up / 10 > ones = up - (tens * 10) > _seven_segment_multiplexer_digit[0] = ones > _seven_segment_multiplexer_digit[1] = tens > > tens = down / 10 > ones = down - (tens * 10) > _seven_segment_multiplexer_digit[2] = ones > _seven_segment_multiplexer_digit[3] = tens > > if up < 10 then > _seven_segment_multiplexer_digit[1] = 27 -- space > end if > end procedure > > 2) Using seven_segment characters in the multiplexer > The multiplexer already uses seven_from_digit(...). So you can show any > seven_segment “character index” by putting that index into the digit buffer > (e.g. 10 = “A”, 27 = space, 34 = “-”, etc.). > > _seven_segment_multiplexer_digit[0] = 10 -- "A" > _seven_segment_multiplexer_digit[1] = 11 -- "b" > _seven_segment_multiplexer_digit[3] = 27 -- "space" > > 3) Showing sbyte negative (e.g. -4) > Yes: display "-" (character index 34) on one digit and 4 on the other. > > _seven_segment_multiplexer_digit[0] = 4 -- "4" > _seven_segment_multiplexer_digit[1] = 34 -- "-" (minus) > > 4) Digits set to input go blank; when set back to output the old value is > gone > To blank/re-enable while keeping the previous value, keep multiplexing > running and blank via the digit data (e.g., use space index 27) rather than > changing pin direction. > > Matt. > On Monday, January 19, 2026 at 5:20:16 PM UTC-5 [email protected] wrote: > >> Hi Matthew >> Hi Matthew >> >> I have some question about the lib 'seven_segment' and >> 'seven_segment_multiplexer'. >> >> 1 It is possible to connect 4 displays but is it also possible to use 2 >> displays independent of the other 2? >> For example: 2 digits for up to 99 and 2 digits for down from 99 >> >> 2 How can I use the characters of the lib 'seven_segment' in >> 'seven_segment_multiplexer'? >> >> 3 Is it possible to get a sbyte (-4) on the display? >> >> 4 When I make 2 displays 'input' their displays are off; when I make them >> 'output again the last information on the displays is gone and the displays >> give the start information. Is it possible the information will come back >> on the displays? >> >> Regards, Peet >> > -- You received this message because you are subscribed to the Google Groups "jallib" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/jallib/2acb0271-4f87-437a-b1e4-1573af355b2an%40googlegroups.com.
