Apple2-IO-RPi/RaspberryPi/apple2driver/driver.go
2021-10-31 14:35:55 -04:00

112 lines
2.7 KiB
Go

// Copyright Terence J. Boldt (c)2020-2021
// Use of this source code is governed by an MIT
// license that can be found in the LICENSE file.
// This file is contains the main driver code for the Raspberry Pi side of
// the Apple2-IO-RPi hardware. Commands are sent from the Apple II and
// responses are sent back from the Raspberry Pi.
package main
import (
"flag"
"fmt"
"os"
"path/filepath"
"github.com/tjboldt/Apple2-IO-RPi/RaspberryPi/apple2driver/a2io"
"github.com/tjboldt/Apple2-IO-RPi/RaspberryPi/apple2driver/handlers"
)
const ReadBlockCommand = 1
const WriteBlockCommand = 2
const GetTimeCommand = 3
const ChangeDriveCommand = 4
const ExecCommand = 5
const LoadFileCommand = 6
const SaveFileCommand = 7
const MenuCommand = 8
func main() {
drive1, drive2 := getDriveFiles()
fmt.Printf("Starting Apple II RPi...\n")
comm := a2io.A2Gpio{}
handlers.SetCommunication(comm)
comm.Init()
for {
command, err := comm.ReadByte()
if err == nil {
switch command {
case ReadBlockCommand:
handlers.ReadBlockCommand(drive1, drive2)
case WriteBlockCommand:
handlers.WriteBlockCommand(drive1, drive2)
case GetTimeCommand:
handlers.GetTimeCommand()
case ExecCommand:
handlers.ExecCommand()
case LoadFileCommand:
handlers.LoadFileCommand()
case MenuCommand:
handlers.MenuCommand()
}
}
}
}
func getDriveFiles() (*os.File, *os.File) {
var drive1Name string
var drive2Name string
execName, _ := os.Executable()
path := filepath.Dir(execName)
path = filepath.Join(path, "..")
path, _ = filepath.EvalSymlinks(path)
defaultFileName := filepath.Join(path, "Apple2-IO-RPi.hdv")
flag.StringVar(&drive1Name, "d1", "", "A ProDOS format drive image for drive 1")
flag.StringVar(&drive2Name, "d2", defaultFileName, "A ProDOS format drive image for drive 2 and will be used for drive 1 if drive 1 empty")
flag.Parse()
var drive1 *os.File = nil
var drive2 *os.File = nil
var err error
if len(drive1Name) > 0 {
fmt.Printf("Opening Drive 1 as: %s\n", drive1Name)
drive1, err = os.OpenFile(drive1Name, os.O_RDWR, 0755)
if err != nil {
fmt.Printf("ERROR: %s", err.Error())
os.Exit(1)
}
}
if len(drive2Name) > 0 {
if drive1 == nil {
fmt.Printf("Opening Drive 1 as: %s because Drive 1 was empty\n", drive2Name)
drive1, err = os.OpenFile(drive2Name, os.O_RDWR, 0755)
if err != nil {
fmt.Printf("ERROR: %s", err.Error())
os.Exit(1)
}
} else {
fmt.Printf("Opening Drive 2 as: %s\n", drive2Name)
drive2, err = os.OpenFile(drive2Name, os.O_RDWR, 0755)
if err != nil {
fmt.Printf("ERROR: %s", err.Error())
os.Exit(1)
}
}
}
if drive1 == nil {
flag.PrintDefaults()
os.Exit(1)
}
return drive1, drive2
}