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render.go
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render.go
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package main
import (
"fmt"
"log"
"periph.io/x/periph/conn/gpio/gpioreg"
"periph.io/x/periph/conn/spi/spireg"
"periph.io/x/periph/experimental/devices/inky"
"periph.io/x/periph/host"
)
// NewInky constructs new Inky display device after attempting to setup hardware
func NewInky(spiPort, dcPin, resetPin, busyPin *string, opts *inky.Opts) (*inky.Dev, error) {
log.Println("Setting up display...")
if _, err := host.Init(); err != nil {
return nil, err
}
log.Printf("Opening %s...", *spiPort)
b, err := spireg.Open(*spiPort)
if err != nil {
return nil, err
}
log.Printf("Opening pins...")
dc := gpioreg.ByName(*dcPin)
if dc == nil {
return nil, fmt.Errorf("invalid DC pin name: %s", *dcPin)
}
reset := gpioreg.ByName(*resetPin)
if reset == nil {
return nil, fmt.Errorf("invalid Reset pin name: %s", *resetPin)
}
busy := gpioreg.ByName(*busyPin)
if busy == nil {
return nil, fmt.Errorf("invalid Busy pin name: %s", *busyPin)
}
dev, err := inky.New(b, dc, reset, busy, opts)
if err != nil {
return nil, err
}
return dev, nil
}