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apple2idiot/examples/foo/foo.ino
Nathanial Hendler cf56af61e3 Beginnings of a slack example.
2021-09-11 16:48:28 -07:00

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/*
blah blah blah
*/
#define DEBUG true
// Load Wi-Fi library
#include <WiFi.h>
#include <ArduinoJson.h>
/**************/
/* 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[] = {D0R, D1R, D2R, D3R, D4R, D5R, D6R, D7R};
byte data_pins[] = {D7R, D6R, D5R, D4R, D3R, D2R, D1R, D0R}; // That's the way the Apple II likes it.
#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
/* 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
//unsigned int data_byte = 0;
// fisrt bit is a flag for if the data is from Apple or from ESP32.
// /
// / last bit is a flag for "more data waiting to be sent".
// / /
#define COMMAND_FROM_APPLE 0 // 0_______
#define COMMAND_FROM_ESP 128 // 1_______
#define COMMAND_MORE_DATA_WAITING 1 // _0000001
#define COMMAND_NO_DATA_WAITING 0 // _0000001
#define COMMAND_GENERIC_MESSAGE 2 // _000001_
#define COMMAND_FETCH_WEATHER 4 // _000010_
#define COMMAND_SEND_LONG_STRING 12 // _000110_
#define COMMAND_FORMAT_RAM 126 // _111111_
#define ETX 3 // ASCII "End of Text" (ETX) character
/************/
/* Interupt */
/************/
/* Variables shared between ISR and main code need to be volatile */
volatile bool isr_handled = false;
volatile uint32_t raw_register_read;
volatile uint16_t raw_register1_read;
/**********************/
/* WiFi and Webserver */
/**********************/
// Replace with your network credentials
const char* wifi_ssid = "GSO";
//const char* wifi_ssid = "Pixel_8985";
const char* wifi_password = "xerxes27";
AsyncWebServer web_server(80);
//WebServer web_server(80);
/*******************/
/* Weather Service */
/*******************/
const String weather_service_api_key= "0ab97bbbea58592d7c9d64067a34d2d0";
const String weather_url = "http://api.openweathermap.org/data/2.5/weather?";
/*********/
/* Misc. */
/*********/
const long readLoopInterval = 10000; // millis
unsigned long lastReadLoopTime = 0;
//byte ram[ADDRESS_BUS_SIZE];
//byte ram[256];
byte ram[256];
volatile byte ram_busy=0;
//const unsigned int RAM_BUSY=666;
#define RAM_BUSY 666
/*################################################
# ISR #
################################################*/
void IRAM_ATTR isrDEVSEL(void) {
raw_register_read = REG_READ(GPIO_IN_REG);
raw_register1_read = REG_READ(GPIO_IN1_REG);
isr_handled = true;
}
/*################################################
# Functions #
################################################*/
boolean set_address(int address) {
if (ram_busy) {
Serial.println("BUSY");
return false;
}
ram_busy = true;
//Serial.print(" Setting address (");
//Serial.print(address);
//Serial.println(")");
//delay(20);
Serial.print(" A:");
for (byte i=0; i<ADDRESS_BUS_SIZE; i++) {
//for (byte i=ADDRESS_BUS_SIZE; i>0; i--) {
byte state = bitRead(address, i);
digitalWrite(address_pins[i], state);
Serial.print(state);
}
Serial.println();
return true;
}
unsigned int read_data(int address) {
Serial.print("READ: ");
Serial.println(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.
Serial.print(" D:");
for (byte i=0; i<DATA_BUS_SIZE; i++) {
byte pin_state = digitalRead(data_pins[i]);
data_bus_read += pin_state * pow(2,i);
Serial.print(pin_state);
}
Serial.println();
ram_busy = false;
return data_bus_read;
} else {
return RAM_BUSY;
}
}
//signed int convert_to_signed_byte(byte byte_to_convert) {
//if (abs(requested_byte_to_write) > 127) {
//if (requested_byte_to_write < 0) {
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);
}
ram_busy = false;
return true;
} else {
return false;
}
}
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]);
}
}
void send_string_to_apple(String string_to_send, byte command_message) {
if (string_to_send.length() > 15 - 1) { // - 1 because of null character at end of string.
} else {
int c=0;
for (c=0; c < string_to_send.length(); c++) {
write_data(c, string_to_send[c]);
}
write_data(c+1, ETX);
write_data(15, COMMAND_FROM_ESP + command_message + COMMAND_NO_DATA_WAITING);
}
}
void fetch_weather(char* city_name) {
HTTPClient http;
//http.begin(String(weather_url) + "?q=Tucson,us&APPID=" + String(weather_service_api_key));
const String request_url = weather_url + "q=Tucson,us&APPID=" + weather_service_api_key;
Serial.println(request_url);
http.begin(request_url);
int httpCode = http.GET(); //Make the request
delay(10);
if (httpCode > 0) { //Check for the returning code
String payload = http.getString();
//Serial.println(httpCode);
Serial.println("++++++++++++++++++++++++");
Serial.println(payload);
Serial.println("++++++++++++++++++++++++");
StaticJsonDocument<200> filter;
filter["weather"][0]["main"] = true;
filter["weather"][0]["description"] = true;
filter["main"]["humidity"] = true;
filter["main"]["temp"] = true;
filter["wind"]["speed"] = true;
filter["wind"]["deg"] = true;
StaticJsonDocument<400> doc;
DeserializationError error = deserializeJson(doc, payload, DeserializationOption::Filter(filter));
//DeserializationError error = deserializeJson(doc, payload);
if (error) {
Serial.print(F("deserializeJson() failed: "));
Serial.println(error.f_str());
} else {
//const char* main = doc["main"];
Serial.println("----------------------");
serializeJsonPretty(doc, Serial);
Serial.println("----------------------");
serializeJsonPretty(doc["wind"], Serial);
Serial.println("----------------------");
int temp = doc["main"]["humidity"];
int humidity = doc["main"]["humidity"];
float wind_speed = doc["wind"]["speed"];
int wind_deg = doc["wind"]["speed"];
String weather_description = doc["weather"][0]["description"];
write_data(0, round(temp-273.15));
write_data(1, round(humidity));
write_data(2, round(wind_deg/10)); // divide by twn because 360 is too big for 8 bits
write_data(3, round(wind_speed));
}
}
else {
Serial.println("Error on HTTP request");
}
http.end(); //Free the resources
}
void read_ram() {
//for (int i=0; i < 16; i++) {
for (int i=0; i < 256; i++) {
unsigned int foo = read_data(i);
ram[i] = foo;
}
}
String html_template_processor(const String& var) {
Serial.println("html_template_processor()");
String return_string = "";
if (var == "RAM_TABLE") {
read_ram();
//for (int i=0; i < 16; i++) {
for (int i=0; i < 256; i++) {
return_string += "<tr><td>"+String(i)+"</td><td>" + String(ram[i]) + "</td></tr>\n";
}
return return_string;
}
return var;
}
void www_weather(AsyncWebServerRequest *request) {
fetch_weather("Tucson");
request->send(SPIFFS, "/ram.htm", String(), false, html_template_processor);
}
void www_root(AsyncWebServerRequest *request) {
request->send(SPIFFS, "/index.htm", String(), false, html_template_processor);
}
void www_ram(AsyncWebServerRequest *request) {
request->send(SPIFFS, "/ram.htm", String(), false, html_template_processor);
}
void www_write_byte(AsyncWebServerRequest *request) {
Serial.println("www_write_byte()");
String address;
String data_byte;
if (request->hasParam("address")) {
address = request->getParam("address")->value();
//Serial.println("Found address: "+address);
if (request->hasParam("data")) {
data_byte = request->getParam("data")->value();
//Serial.println("Found data: "+data_byte);
write_data(address.toInt(), data_byte.toInt());
}
}
request->send(SPIFFS, "/ram.htm", String(), false, html_template_processor);
}
void www_css(AsyncWebServerRequest *request) {
request->send(SPIFFS, "/a2i.css", "text/css");
}
void prefill_ram_with_pattern_data() {
write_data(15, 0); // notify Apple IIe we are done processing command byte
write_data(14, 123); // notify Apple IIe we are done processing command byte
write_data(13, 1); // notify Apple IIe we are done processing command byte
write_data(12, 123); // notify Apple IIe we are done processing command byte
write_data(11, 2); // notify Apple IIe we are done processing command byte
write_data(10, 123); // notify Apple IIe we are done processing command byte
write_data(9, 3); // notify Apple IIe we are done processing command byte
write_data(8, 123); // notify Apple IIe we are done processing command byte
write_data(7, 4); // notify Apple IIe we are done processing command byte
write_data(6, 123); // notify Apple IIe we are done processing command byte
write_data(5, 5); // notify Apple IIe we are done processing command byte
write_data(4, 123); // notify Apple IIe we are done processing command byte
write_data(3, 6); // notify Apple IIe we are done processing command byte
write_data(2, 123); // notify Apple IIe we are done processing command byte
write_data(1, 7); // notify Apple IIe we are done processing command byte
write_data(0, 123); // notify Apple IIe we are done processing command byte
}
/*################################################
# Setup #
################################################*/
void setup() {
/* 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);
delay(10);
//wifi_scan();
/* Connect to wifi */
Serial.begin(115200);
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
prefill_ram_with_pattern_data();
store_ip_to_ram(0);
//store_ip_to_ram(4);
/* Start webserver */
if(!SPIFFS.begin()){
Serial.println("An Error has occurred while mounting SPIFFS");
}
web_server.on("/", HTTP_GET, www_root);
web_server.on("/a2i.css", HTTP_GET, www_css);
web_server.on("/ram", HTTP_GET, www_ram);
web_server.on("/write_byte", HTTP_GET, www_write_byte);
web_server.on("/weather", HTTP_GET, www_weather);
web_server.on("/heap", HTTP_GET, [](AsyncWebServerRequest *request){
request->send(200, "text/plain", "Free Heap: " + String(ESP.getFreeHeap()) + " bytes.");
});
//web_server.on("/hello", HTTP_GET, [](AsyncWebServerRequest *request){
//request->send(200, "text/plain", "Hello World");
//});
//web_server.on("/", www_root);
web_server.begin();
Serial.println("HTTP server started");
delay(10);
/* Display file system contents */
Serial.println("-----------------------------------------");
File root_filesystem = SPIFFS.open("/");
File f = root_filesystem.openNextFile();
while(f){
Serial.print("FILE: ");
Serial.println(f.name());
f = root_filesystem.openNextFile();
}
Serial.println("-----------------------------------------");
//attachInterrupt(DEVSEL_PIN, isrDEVSEL, LOW);
}
/*################################################
# Main #
################################################*/
void loop() {
//if (isr_handled) {
//data_byte = raw_register_read >> 12 & 0b00000000000011111111;
//isr_handled = false;
//}
if ((millis() - lastReadLoopTime) > readLoopInterval) {
//Serial.println("+++");
unsigned int command_byte = read_data(15);
if (command_byte == RAM_BUSY) {
Serial.println("Command Read: RAM BUSY");
}
else if (command_byte < COMMAND_FROM_ESP) {
// command came from apple (or webform).
Serial.print("Command Read: ");
Serial.println(command_byte);
//write_data(15, 1); // notify Apple IIe we are processing command byte
switch(command_byte) {
case COMMAND_FETCH_WEATHER:
Serial.println("Fetch Weather");
fetch_weather("Tucson");
break;
case COMMAND_SEND_LONG_STRING:
//send_string_to_apple("This is a long string", COMMAND_GENERIC_MESSAGE);
send_string_to_apple("ABCDE", COMMAND_GENERIC_MESSAGE);
case COMMAND_FORMAT_RAM:
Serial.println("Calling prefill_ram_with_pattern_data()");
prefill_ram_with_pattern_data();
write_data(15, 0); // notify Apple IIe we are done processing command byte
break;
}
/*
byte c = 0;
while (ram_busy && (c < 10)) {
delay(10);
c = c+1;
Serial.print("_");
}
Serial.println("^^^^");
write_data(15, 0); // notify Apple IIe we are done processing command byte
read_data(15); // notify Apple IIe we are done processing command byte
*/
}
lastReadLoopTime = millis();
}
}
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