GitHub - vogelchr/subway_led_panel_stm32f103: Wiggle pins to light up a LED matrix.

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.gitignore		.gitignore
README.txt		README.txt
platformio.ini		platformio.ini

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Subway Sign Control using a BluePill stm32f103 Board

Pins used:

        A0..A2: row select
        A3: row driver output enable, low active

        A4: column driver latch enable
        A5: column driver clock
        A6: column driver bit read back (not implemented)
        A7: column driver bit output
        A8: column driver output enable (inverted)

        PC13: heartbeat LED