• PIC P18F45K22 read Stern MPU bcd signal

    From infrared pinball@infraredgr@gmail.com to rec.games.pinball on Sunday, January 03, 2021 12:09:06
    From Newsgroup: rec.games.pinball

    Hello,

    i dont know if this is the right place to ask this

    I have a Stern MPU in the bench that working perfect and i want with a pic microcontroller to read the bcd signal from mpu J1 connector and pins
    25=A,26=B,27=C,28=D
    I use port B of pic B0,B1,B2,B3 and set that pins as input.

    After the seven flash i set the pinball mpu to first test by ground j3 pin to ground for a moment to set the display to count from 0 to 9.

    The problem is that the bcd code i get is only 0000 or 1111
    As i know the mpu bcd codes is only from 0 to 9 but the 1111 is 15.

    this is the code in mikroc

    unsigned int bcd;

    ANSELB = 0; // Configure PORTB pins as digital
    TRISB0_bit = 1; // input BCD A
    TRISB1_bit = 1; // input BCD B
    TRISB2_bit = 1; // input BCD C
    TRISB3_bit = 1; // input BCD D

    do
    {
    bcd = PORTB & 0b00001111;
    // code for display bcd value
    Delay_ms(50);


    } while(1);

    Does anyone knows if that is correct.

    Regards
    Michael
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  • From seymour.shabow@seymour.shabow@gmail.com to rec.games.pinball on Tuesday, January 05, 2021 19:16:04
    From Newsgroup: rec.games.pinball

    infrared pinball wrote:
    After the seven flash i set the pinball mpu to first test by ground
    j3 pin to ground for a moment to set the display to count from 0 to
    9.

    The problem is that the bcd code i get is only 0000 or 1111 As i know
    the mpu bcd codes is only from 0 to 9 but the 1111 is 15.


    Does anyone knows if that is correct.

    If it's a stern mpu100 rom in there, the first test is lamps, not
    displays. If it's an mpu200 rom, the first test would be a burn in test
    which would walk the display.

    1111/F=blank, which is what the first test on mpu100 firmware would show

    Are you trying to capture the scoring for something like a scorbit or recording of scores? You will need to connect up the digit enables as
    well to sort things out.
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  • From infrared pinball@infraredgr@gmail.com to rec.games.pinball on Wednesday, January 13, 2021 04:02:31
    From Newsgroup: rec.games.pinball

    Στις Τετάρτη, 6 Ιανουαρίου 2021 στις 2:16:17 π.μ. UTC+2, ο χρήστης seymour-shabow έγραψε:
    infrared pinball wrote:
    After the seven flash i set the pinball mpu to first test by ground
    j3 pin to ground for a moment to set the display to count from 0 to
    9.

    The problem is that the bcd code i get is only 0000 or 1111 As i know
    the mpu bcd codes is only from 0 to 9 but the 1111 is 15.


    Does anyone knows if that is correct.
    If it's a stern mpu100 rom in there, the first test is lamps, not
    displays. If it's an mpu200 rom, the first test would be a burn in test which would walk the display.

    1111/F=blank, which is what the first test on mpu100 firmware would show

    Are you trying to capture the scoring for something like a scorbit or recording of scores? You will need to connect up the digit enables as
    well to sort things out.
    The Mpu is Stern 200.
    I am trying to capture the display signal to show to lcd for my bench testing. The connections of bcd, digit enables and strobes are connected already to the pic.
    I just want first only read the bcd for test at the beginning and then write the complete code.
    It is surprises me that the bcd code includes the value 1111
    Thanks
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  • From seymour.shabow@seymour.shabow@gmail.com to rec.games.pinball on Wednesday, January 13, 2021 11:30:41
    From Newsgroup: rec.games.pinball

    infrared pinball wrote:
    It is surprises me that the bcd code includes the value 1111


    That's the decoder chip on the display to indicate all segments off (blank)

    There might be residual voltage otherwise if you just rely on the
    blanking causing some segments to ghost
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  • From robotg...@gmail.com@robotgallery@gmail.com to rec.games.pinball on Tuesday, April 06, 2021 15:08:27
    From Newsgroup: rec.games.pinball

    On Wednesday, January 13, 2021 at 7:02:37 AM UTC-5, infra...@gmail.com wrote:
    Στις Τετάρτη, 6 Ιανουαρίου 2021 στις 2:16:17 π.μ. UTC+2, ο χρήστης seymour-shabow έγραψε:
    The Mpu is Stern 200.
    I am trying to capture the display signal to show to lcd for my bench testing. The connections of bcd, digit enables and strobes are connected already to the pic.
    I just want first only read the bcd for test at the beginning and then write the complete code.
    It is surprises me that the bcd code includes the value 1111
    This project may do what you want. I built up a couple and they seem to work well. I had a single display for bench testing but that needed a jumper set for what display you wanted to view. The one on the LISY site shows them all at once:
    https://lisy.dev/bally-lcd-display.html
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  • From marlon markland@marklandm01@gmail.com to rec.games.pinball on Tuesday, April 06, 2021 15:19:39
    From Newsgroup: rec.games.pinball

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  • From John Robertson@spam@flippers.com to rec.games.pinball on Tuesday, April 06, 2021 15:36:45
    From Newsgroup: rec.games.pinball

    On 2021/04/06 3:19 p.m., marlon markland wrote:
    https://pinballsa...

    Spammers do realize that folks learn to ignore certain companies and
    even boycott them if particularly annoying? And tell their friends who
    tell their friends, and so on and so on...

    John :-#(#
    --
    (Please post followups or tech inquiries to the USENET newsgroup)
    John's Jukes Ltd.
    MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
    (604)872-5757 (Pinballs, Jukes, Video Games)
    www.flippers.com
    "Old pinballers never die, they just flip out."
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  • From Jeremy Fleitz@jeremy.fleitz@gmail.com to rec.games.pinball on Tuesday, April 06, 2021 15:56:55
    From Newsgroup: rec.games.pinball

    On Tuesday, April 6, 2021 at 6:36:57 PM UTC-4, John Robertson wrote:
    On 2021/04/06 3:19 p.m., marlon markland wrote:
    https://pinballsa...

    Spammers do realize that folks learn to ignore certain companies and
    even boycott them if particularly annoying? And tell their friends who
    tell their friends, and so on and so on...

    John :-#(#
    Not only that, but I fell for it and clicked on the ad thinking "really a NIB ac/dc?". Then you scroll to the bottom of the page and it says "Moving Mick target", "13 rolling stones songs". Oops! If you are going to spam, at least update both of the descriptions for what you are spamming X)
    Nice to post on rgp again!
    -Jeremy
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