Apple-2-HW/apple2idiot
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apple2idiot/examples/weather/weather.ino

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/*
Use this program with the Apple2idIOT card and the basic programs RRAM, WRAM and CMDROT to read/write and rot13
a single string contained within the dual port ram on the card.
*/
#define DEBUG true
// Load Wi-Fi library
#include <WiFi.h>
/**********************/
/* Default WiFi */
/**********************/
// Replace with your network credentials
const char* wifi_ssid = "ella";
const char* wifi_password = "";
/**************/
/* ESP32 Pins */
/**************/
/* DATA BUS (numbers mean GPIO port) */
#define D0R 12
#define D1R 13
#define D2R 14
#define D3R 15
#define D4R 16
#define D5R 17
#define D6R 18
#define D7R 19
byte data_pins[] = {D7R, D6R, D5R, D4R, D3R, D2R, D1R, D0R};
#define DATA_BUS_SIZE 8
/* Address Bus */
#define A0R 21
#define A1R 22
#define A2R 23
#define A3R 25
#define A4R 26
#define A5R 27
#define A6R 32
#define A7R 33
byte address_pins[] = {A0R, A1R, A2R, A3R, A4R, A5R, A6R, A7R};
#define ADDRESS_BUS_SIZE 8
#define ESP_COMMAND_ADDRESS 0
#define APPLE_COMMAND_ADDRESS 1
#define SHARED_RAM_START_ADDRESS 2
#define RAM_BUSY 666
#define MAX_STR_LEN 44 // arbitrary length.
#define COMMAND_GENERIC 0b10000000
#define COMMAND_SCAN_WIFI 111
#define COMMAND_CONNECT 112
/* IDT7132S dual port ram chip enable */
#define RW_PIN 5
#define RW_WRITE LOW
#define RW_READ HIGH
#define INPUT_35 35
#define INPUT_34 34
#define ETX 3 // ASCII "End of Text" (ETX) character
#define ACK 0b00000110 // Acknowledge
#define EOT 0b00000100 // End of transmit
/*********/
/* Misc. */
/*********/
const long readLoopInterval = 100; // millis
unsigned long lastReadLoopTime = 0;
byte ram[256];
volatile byte ram_busy=0;
byte lastAppleCommand = 0;
/*################################################
# Functions #
################################################*/
void unbusy_ram() {
set_address(ESP_COMMAND_ADDRESS);
ram_busy = false;
}
boolean set_address(int address) {
if (ram_busy) {
Serial.println("BUSY");
return false;
}
ram_busy = true;
for (byte i=0; i<ADDRESS_BUS_SIZE; i++) {
byte state = bitRead(address, i);
digitalWrite(address_pins[i], state);
}
return true;
}
byte read_data(int address) {
byte data_bus_read = 0;
if (set_address(address)) {
digitalWrite(RW_PIN, RW_READ); // Should already be set to RW_READ, but just in case.
for (byte i=0; i<DATA_BUS_SIZE; i++) {
byte pin_state = digitalRead(data_pins[i]);
data_bus_read += pin_state * pow(2,i);
}
ram_busy = false;
unbusy_ram();
return data_bus_read;
} else {
return RAM_BUSY;
}
}
boolean write_data(byte address, byte byte_to_write) {
Serial.print("WRITE: ");
Serial.print(byte_to_write);
Serial.print(" -> ");
Serial.println(address);
if (set_address(address)) {
//set_address(address);
Serial.print(" D:");
for (byte i=0; i<DATA_BUS_SIZE; i++) {
byte bit_to_write = (byte_to_write >> i) & 0b00000001;
pinMode(data_pins[i], OUTPUT);
digitalWrite(data_pins[i], bit_to_write);
Serial.print(bit_to_write);
}
Serial.println();
digitalWrite(RW_PIN, RW_WRITE);
delay(1);
digitalWrite(RW_PIN, RW_READ);
for (byte i=0; i<DATA_BUS_SIZE; i++) {
pinMode(data_pins[i], INPUT);
}
unbusy_ram();
return true;
} else {
return false;
}
}
unsigned int write_string_to_shared_ram(String string_to_send, unsigned int address) {
//if (string_to_send.length() > 15 - 1) { // - 1 because of null character at end of string.
write_data(ESP_COMMAND_ADDRESS, 12);
unsigned int c = 0;
for (c=0; c < string_to_send.length(); c++) {
Serial.print("A(");
Serial.print(c);
Serial.print("): ");
Serial.println(string_to_send[c]);
write_data(address+c, string_to_send[c]);
}
write_data(address+c, ETX);
//write_data(15, COMMAND_FROM_ESP + command_message + COMMAND_NO_DATA_WAITING);
write_data(ESP_COMMAND_ADDRESS, 27);
return address+c;
}
String read_string_from_ram(int address) {
byte c = 0;
int i = 0;
String read_string = "";
while ( (i<MAX_STR_LEN) && (c!=ETX) ) {
c = read_data(address+i);
read_string = read_string + char(c);
i++;
}
Serial.print("READ STRING:");
Serial.println(read_string);
return read_string;
}
void read_ram(int size_to_read=256);
void read_ram(int size_to_read) {
for (int i=0; i < size_to_read; i++) {
unsigned int foo = read_data(i);
ram[i] = foo;
Serial.print(i);
Serial.print(" ");
Serial.println(foo);
}
}
/*################################################
# Setup #
################################################*/
void setup() {
Serial.begin(115200);
/* Configure ESP32 Pins */
pinMode(A0R, OUTPUT); digitalWrite(A0R, LOW);
pinMode(A1R, OUTPUT); digitalWrite(A1R, LOW);
pinMode(A2R, OUTPUT); digitalWrite(A2R, LOW);
pinMode(A3R, OUTPUT); digitalWrite(A3R, LOW);
pinMode(A4R, OUTPUT); digitalWrite(A4R, LOW);
pinMode(A5R, OUTPUT); digitalWrite(A5R, LOW);
pinMode(A6R, OUTPUT); digitalWrite(A6R, LOW);
pinMode(A7R, OUTPUT); digitalWrite(A7R, LOW);
pinMode(D0R, INPUT);
pinMode(D1R, INPUT);
pinMode(D2R, INPUT);
pinMode(D3R, INPUT);
pinMode(D4R, INPUT);
pinMode(D5R, INPUT);
pinMode(D6R, INPUT);
pinMode(D7R, INPUT);
pinMode(RW_PIN, OUTPUT); digitalWrite(RW_PIN, RW_READ);
pinMode(INPUT_34, INPUT);
pinMode(INPUT_35, INPUT);
Serial.println("");
Serial.println("Starting wifi...");
Serial.print(" connecting to: ");
Serial.println(wifi_ssid);
WiFi.begin(wifi_ssid, wifi_password);
while (WiFi.status() != WL_CONNECTED) {
delay(900);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected successfully");
Serial.print("Got IP: ");
Serial.println(WiFi.localIP()); //Show ESP32 IP on serial
// Set WiFi to station mode and disconnect from an AP if it was previously connected
WiFi.mode(WIFI_STA);
WiFi.disconnect();
delay(10);
write_string_to_shared_ram("Starting Up!", SHARED_RAM_START_ADDRESS);
write_data(ESP_COMMAND_ADDRESS, ACK);
write_data(APPLE_COMMAND_ADDRESS, ACK);
Serial.println("Setup done");
}
/*################################################
# Main #
################################################*/
void scan_wifi() {
Serial.println("scan start");
// WiFi.scanNetworks will return the number of networks found
int n = WiFi.scanNetworks();
Serial.println("scan done");
int address_counter = SHARED_RAM_START_ADDRESS + 1;
if (n == 0) {
Serial.println("no networks found");
write_data(0, address_counter);
} else {
Serial.print(n);
Serial.println(" networks found");
write_data(n, address_counter);
for (int i = 0; i < n; ++i) {
// Print SSID and RSSI for each network found
Serial.print(i + 1);
Serial.print(": ");
Serial.print(WiFi.SSID(i));
Serial.print(" (");
Serial.print(WiFi.RSSI(i));
Serial.print(")");
Serial.println((WiFi.encryptionType(i) == WIFI_AUTH_OPEN)?" ":"*");
delay(10);
address_counter = write_string_to_shared_ram(WiFi.SSID(i), address_counter + 1);
//address_counter = write_string_to_shared_ram(String(WiFi.RSSI(i)), address_counter + 1);
//address_counter = write_string_to_shared_ram(WiFi.encryptionType(i), address_counter + 1);
}
}
write_data(ESP_COMMAND_ADDRESS, EOT);
Serial.println("");
}
void store_ip_to_ram(byte offset) {
IPAddress ip_address = WiFi.localIP();
//for (int i=0; i < ADDRESS_BUS_SIZE; i++) {
for (int i=0; i < 4; i++) {
write_data(i+offset, ip_address[i]);
}
}
const char* wifi_ssid = "";
const char* wifi_password = "";
void loop() {
if ((millis() - lastReadLoopTime) > readLoopInterval) {
byte command_byte = read_data(APPLE_COMMAND_ADDRESS);
if (command_byte == RAM_BUSY) {
Serial.println("Command Read: RAM BUSY");
}
else if (command_byte != lastAppleCommand){
Serial.print("Command Switch command_byte: ");
Serial.println(command_byte);
switch(command_byte) {
case COMMAND_SCAN_WIFI:
write_data(ESP_COMMAND_ADDRESS, ACK); // notify Apple IIe we are processing command byte
//String read_string = read_string_from_ram(SHARED_RAM_START_ADDRESS);
//write_string_to_shared_ram(rot13(read_string), SHARED_RAM_START_ADDRESS);
scan_wifi();
write_data(APPLE_COMMAND_ADDRESS, ACK); // notify Apple IIe we are processing command byte
break;
}
switch(command_byte) {
case COMMAND_CONNECT:
write_data(ESP_COMMAND_ADDRESS, ACK); // notify Apple IIe we are processing command byte
int access_point_n = read_data(SHARED_RAM_START_ADDRESS);
String ssid_as_String = WiFi.SSID(access_point_n);
String password_as_String = read_string_from_ram(SHARED_RAM_START_ADDRESS+1);
wifi_password = password_as_String.c_str();
wifi_ssid = ssid_as_String.c_str();
//wifi_password = read_string_from_ram(SHARED_RAM_START_ADDRESS+1);
//wifi_ssid = WiFi.SSID(access_point_n);
//WiFi.begin(wifi_ssid, wifi_password);
Serial.print("password:");
Serial.println(password_as_String);
Serial.print("password:(");
Serial.print(wifi_password);
Serial.println(")");
//WiFi.begin(wifi_ssid, wifi_password);
WiFi.begin("GSO", "xerxes27");
while (WiFi.status() != WL_CONNECTED) {
delay(300);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected successfully");
Serial.print("Got IP: ");
Serial.println(WiFi.localIP()); //Show ESP32 IP on serial
store_ip_to_ram(SHARED_RAM_START_ADDRESS);
write_data(APPLE_COMMAND_ADDRESS, ACK);
break;
}
lastAppleCommand = command_byte;
write_data(ESP_COMMAND_ADDRESS, EOT); // notify Apple IIe we are done processing command byte
}
lastReadLoopTime = millis();
}
}
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