Table of Contents
The game port libraries are used when connecting an Arduino to the game port connector with this setup:
Low Level SPI Port
The connection is made by bit-banging an SPI like protocol between the Apple II and Arduino. The SPI protocol as managed through the SPI Low Level interface. Accessed via:
Compatibility: II
Usage: include "inc/spiport.plh"
Values:
const SPI_SLAVE_READY = '@'
const SPI_SLAVE_ERROR = '!'
const SPI_SLAVE_BUSY = $FF
Functions:
spiXferByte(outbyte)
spiSend(data)
spiRecv()
spiWriteBuf(buf, len)
spiReadBuf(buf, len)
spiDelay(time)
spiReady()
Source Code: spiport.pla
Sample Source: sdfat.pla
Wiring Library
A wiring style library allows for controlling the I/O pins on the Arduino. Accessed via:
Compatibility: II
Usage: include "inc/spiport.plh"
Values:
//
// Wiring constants for Arduino
//
const PINHIGH = 1
const PINLOW = 0
const PINOUTPUT = 1
const PININPUT = 0
const PINPULLUP = 2
//
// SPI commands to Wiring functions on Arduino
//
const CMDPINMODE = 3
const CMDDIGREAD = 4
const CMDDIGWRITE = 5
const CMDANAREAD = 6
const CMDANAWRITE = 7
//
// SPI commands to serial functions on Arduino
//
const CMDSERMODE = 8
const CMDSERAVAIL = 9
const CMDSERREAD = 10
const CMDSERWRITE = 11
SD Card FAT Filesystem Access
If the Arduino has an SD card shield attached, the FAT filesystem can be accessed from the Apple II through the SD Fat Library. Accessed via:
Compatibility: II
Usage: include "inc/sdfat.plh"
Values:
//
// Open flags
//
const O_READ = $01
const O_WRITE = $02
const O_APPEND = $04
const O_SYNC = $08
const O_TRUNC = $10
const O_AT_END = $20
const O_CREAT = $40
const O_EXCL = $80
const MAX_FAT_BUF_SIZE = 512
API:
sdFAT:getDir
sdFAT:setDir
sdFAT:newDir
sdFAT:removeDir
sdFAT:renameFile
sdFAT:removeFile
sdFAT:existsFile
sdFAT:openFirstFile
sdFAT:openNextFile
sdFAT:openFile
sdFAT:closeFile
sdFAT:readFile
sdFAT:writeFile
sdFAT:syncFile
sdFAT:rewindFile
sdFAT:seekFile
sdFAT:seekOffsetFile
sdFAT:posFile
sdFAT:sizeOfFile
sdFAT:truncateFile
sdFAT:isDir
sdFAT:isFile
Source Code: sdfat.pla
Sample Source: fatcat.pla, fatget.pla, fatput.pla, fatreaddsk.pla, fatwritedsk.pla