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I'm building a burglar alam with my son, using a Raspberry Pi Zero as the micro-controller, and using Go as the programming language.
That's led to me needing a few libraries along the way. Today's library is, the 4 digit, 7 segment display (e.g. part number 3461BS). It can scroll text and display images.
You can grab the code from [0]
<video src="/2019/10/IMG_2140.mp4" width="540"/>
err := rpio.Open()
if err != nil {
fmt.Printf("error: %v\n", err)
os.Exit(1)
}
defer rpio.Close()
// Setup the display.
// Row 1 (top row of pins).
pD1 := rpio.Pin(8) // BCM pin, see https://pinout.xyz
pa := rpio.Pin(7)
pf := rpio.Pin(16)
pD2 := rpio.Pin(20)
pD3 := rpio.Pin(26)
pb := rpio.Pin(19)
// // Row 2 (bottom row of pins).
pe := rpio.Pin(13)
pd := rpio.Pin(6)
pdp := rpio.Pin(5)
pc := rpio.Pin(0)
pg := rpio.Pin(11)
pD4 := rpio.Pin(9)
disp := segment.NewFourDigitSevenSegmentDisplay(pD1, pa, pf, pD2, pD3, pb, pe, pd, pdp, pc, pg, pD4)
disp.Start(context.Background(), "hello")
reader := bufio.NewReader(os.Stdin)
for {
s, _ := reader.ReadString('\n')
disp.Update(s)
}
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