first commit

.gitignore

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+Client/pihon-client/library/*
+Client/python-pihon-converter/input/*
+Client/python-pihon-converter/output/*
+Client/ui-dev (deprecated)/library/*

Client/gpiod-dev/cross-compile-release.sh

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+GOOS=linux GOARCH=arm GOARM=6 go build -ldflags="-s -w"

Client/gpiod-dev/go.mod

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+module gpioddev
+
+go 1.18
+
+require github.com/warthog618/gpiod v0.8.0

Client/gpiod-dev/main.go

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+// SPDX-FileCopyrightText: 2020 Kent Gibson <[email protected]>
+//
+// SPDX-License-Identifier: MIT
+
+//go:build linux
+// +build linux
+
+// A simple example that watches an input pin and reports edge events.
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"syscall"
+	"time"
+
+	"github.com/warthog618/gpiod"
+	"github.com/warthog618/gpiod/device/rpi"
+)
+
+func eventHandler(evt gpiod.LineEvent) {
+	t := time.Now()
+	edge := "rising"
+	if evt.Type == gpiod.LineEventFallingEdge {
+		edge = "falling"
+	}
+	if evt.Seqno != 0 {
+		// only uAPI v2 populates the sequence numbers
+		fmt.Printf("event: #%d(%d)%3d %-7s %s (%s)\n",
+			evt.Seqno,
+			evt.LineSeqno,
+			evt.Offset,
+			edge,
+			t.Format(time.RFC3339Nano),
+			evt.Timestamp)
+	} else {
+		fmt.Printf("event:%3d %-7s %s (%s)\n",
+			evt.Offset,
+			edge,
+			t.Format(time.RFC3339Nano),
+			evt.Timestamp)
+	}
+}
+
+// Watches GPIO 23 (Raspberry Pi J8-16) and reports when it changes state.
+func main() {
+	offset := rpi.J8p11
+	l, err := gpiod.RequestLine("gpiochip0", offset,
+		gpiod.WithPullUp,
+		gpiod.WithBothEdges,
+		gpiod.WithEventHandler(eventHandler))
+	if err != nil {
+		fmt.Printf("RequestLine returned error: %s\n", err)
+		if err == syscall.Errno(22) {
+			fmt.Println("Note that the WithPullUp option requires kernel V5.5 or later - check your kernel version.")
+		}
+		os.Exit(1)
+	}
+	defer l.Close()
+
+	// In a real application the main thread would do something useful.
+	// But we'll just run for a minute then exit.
+	fmt.Printf("Watching Pin %d...\n", offset)
+	time.Sleep(time.Minute)
+	fmt.Println("exiting...")
+}

Client/links.txt

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+https://crates.io/crates/ssd1306
+https://github.com/rust-embedded/awesome-embedded-rust#other

Client/pihon-client/appdata/appdata.go

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+package appdata
+
+import (
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+	"strconv"
+)
+
+var DataPath string
+
+func checkError(error error) {
+	if error != nil {
+		log.Fatal(error)
+	}
+}
+
+func SaveBookData(bookHash string, bookPosition int) {
+	_ = os.Remove(DataPath + bookHash)
+	f, err := os.Create(DataPath + bookHash)
+	checkError(err)
+	defer f.Close()
+	f.WriteString(fmt.Sprintf("%d", bookPosition))
+	fmt.Printf("Saving current position : %d\n", bookPosition)
+}
+
+func ReadBookData(bookHash string) int {
+	if _, err := os.Stat(DataPath + bookHash); errors.Is(err, os.ErrNotExist) {
+		SaveBookData(bookHash, 0)
+		return 0
+	}
+	content, err := ioutil.ReadFile(DataPath + bookHash)
+	checkError(err)
+	i, err := strconv.Atoi(string(content))
+	checkError(err)
+	return i
+}

Client/pihon-client/cross-compile-release.sh

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+GOOS=linux GOARCH=arm GOARM=6 go build -ldflags="-s -w"

Client/pihon-client/cross-compile.sh

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+GOOS=linux GOARCH=arm GOARM=6 go build

Client/pihon-client/extras/extras.go

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+package extras
+
+import (
+	"log"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/go-ping/ping"
+)
+
+var LeftButtonState = false
+var RightButtonState = false
+var LeftButtonPressedTime time.Time
+var NavigationHoldDuration float64
+var CloudflareIP string
+
+func checkError(error error) {
+	if error != nil {
+		log.Fatal(error)
+	}
+}
+
+func GetCWD() string {
+	path, err := os.Getwd()
+	checkError(err)
+	dirname, err := os.UserHomeDir()
+	checkError(err)
+	return strings.Replace(path+"/", dirname, "~", 1)
+}
+
+func FitWithinCharacterLimits(characterLimit int, stringToFit string) string {
+	if characterLimit > len(stringToFit) {
+		return stringToFit
+	}
+	return string(stringToFit[:characterLimit-1])
+}
+
+func PingCloudflare() bool {
+	pinger, err := ping.NewPinger(CloudflareIP)
+	if err != nil {
+		panic(err)
+	}
+	pinger.Count = 1
+	err = pinger.Run() // Blocks until finished.
+	if err != nil {
+		panic(err)
+	}
+	stats := pinger.Statistics()
+	if stats.PacketLoss == 0 {
+		return true
+	} else {
+		return false
+	}
+}

Client/pihon-client/go.mod

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+module pihonclient
+
+go 1.14
+
+require (
+	github.com/go-ping/ping v1.0.0
+	github.com/pbnjay/pixfont v0.0.0-20200714042608-33b744692567
+	github.com/warthog618/gpiod v0.8.0
+	periph.io/x/conn/v3 v3.6.10
+	periph.io/x/devices/v3 v3.6.13
+	periph.io/x/host/v3 v3.7.2
+)