Add some Example

Modules:
    Plus, Servo
Unit:
    ADC, DAC, Color, TOF
Stick:
    test

examples/Modules/Plus/Plus.ino

@@ -0,0 +1,45 @@
+#include <Arduino.h>
+#include <M5Stack.h>
+
+#define IrPin 13
+#define PLUS_ADDR 0x62
+
+int32_t number = 0;
+uint8_t press = 0;
+
+
+void setup() {
+    M5.begin(true, false, false);
+    M5.Lcd.setTextFont(6);
+    M5.Lcd.clear(BLACK);
+    M5.Lcd.setTextColor(ORANGE, BLACK);
+    Wire.begin();
+    ledcSetup(1, 38000, 10);
+    ledcAttachPin(IrPin, 1);
+}
+
+void plus_encode() {
+    Wire.requestFrom(PLUS_ADDR, 2);
+    while(Wire.available()) {
+        int8_t encode = Wire.read();
+        uint8_t press_n = Wire.read();
+        number += encode;
+        if(press_n == 0xff) {
+            press = 0;
+        }
+        else {
+            press = 1;
+        }
+    }
+}
+
+void loop() {
+    char data[20];
+
+    plus_encode();
+    ledcWrite(1, ledcRead(1) ? 0 : 512);
+    sprintf(data, "%d  %d        ", number, press);
+    M5.Lcd.setCursor(100, 100);
+    M5.Lcd.print(data);
+    vTaskDelay(200);
+}

examples/Modules/Servo/Servo.ino

@@ -0,0 +1,44 @@
+#include <Arduino.h>
+#include <M5Stack.h>
+#include <Wire.h>
+
+#define SERVO_ADDR 0x53
+void setup() {
+    M5.begin(true, false, true);
+    M5.Lcd.setTextFont(4);
+    M5.Lcd.setCursor(70, 100);
+    M5.Lcd.print("Servo Example");
+
+    Wire.begin(21, 22, 100000);
+    // put your setup code here, to run once:
+}
+
+// addr 0x01 mean control the number 1 servo by us
+void Servo_write_us(uint8_t number, uint16_t us) {
+    Wire.beginTransmission(SERVO_ADDR);
+    Wire.write(0x00 | number);
+    Wire.write(us & 0x00ff);
+    Wire.write(us >> 8 & 0x00ff);
+    Wire.endTransmission();
+}
+
+// addr 0x11 mean control the number 1 servo by angle
+void Servo_write_angle(uint8_t number, uint8_t angle) {
+    Wire.beginTransmission(SERVO_ADDR);
+    Wire.write(0x10 | number);
+    Wire.write(angle);
+    Wire.endTransmission();
+}
+
+void loop() {
+    for(uint8_t i = 0; i < 12; i++){
+        Servo_write_us(i, 700);
+        // Servo_write_angle(i, 0);
+    }
+    delay(1000);
+    for(uint8_t i = 0; i < 12; i++){
+        Servo_write_us(i, 2300);
+        // Servo_write_angle(i, 180);
+    }
+    delay(1000);
+}

examples/Stick/FactoryTest/FactoryTest.ino

@@ -0,0 +1,78 @@
+/*
+Stick test
+    hardware: M5Stack Stick
+  
+  please install the U8g2 library first ...
+*/
+
+#include <Arduino.h>
+#include <U8x8lib.h>
+#include <SPI.h>
+#include <Wire.h>
+
+#define LedPin 19
+#define IrPin 17
+#define BuzzerPin 26
+#define BtnPin 35
+
+U8X8_SH1107_64X128_4W_HW_SPI u8x8(14, /* dc=*/ 27, /* reset=*/ 33);
+bool mpu9250_exis = false;
+void mpu9250_test() {
+    uint8_t data = 0;
+    Wire.beginTransmission(0x68);         
+    Wire.write(0x75);                     
+    Wire.endTransmission(true);
+    Wire.requestFrom(0x68, 1);  
+    data = Wire.read();                   
+
+    Serial.print("mpu9250 addr: ");
+    Serial.println(data, HEX);
+    if(data == 0x71) {
+        mpu9250_exis = true;
+    }
+}
+
+void setup() {
+    // put your setup code here, to run once:
+    Wire.begin(21, 22, 100000);
+    u8x8.begin();
+    Serial.begin(115200);
+
+    pinMode(LedPin, OUTPUT);
+    pinMode(IrPin, OUTPUT);
+    pinMode(BuzzerPin, OUTPUT);
+    pinMode(BtnPin, INPUT_PULLUP);
+    ledcSetup(1, 38000, 10);
+    ledcAttachPin(IrPin, 1);
+    digitalWrite(BuzzerPin, LOW);
+    u8x8.fillDisplay();
+    u8x8.setFont(u8x8_font_chroma48medium8_r);
+    delay(1500);
+    u8x8.clearDisplay();
+    mpu9250_test();
+}
+
+void loop()
+{
+    digitalWrite(LedPin, 1 - digitalRead(LedPin));
+    ledcWrite(1, ledcRead(1) ? 0 : 512);
+    delay(200);
+    if(digitalRead(BtnPin) == 0){
+        u8x8.drawString(2,0,"Hello");
+        u8x8.drawString(2,1,"World!");
+        if(mpu9250_exis) {
+            u8x8.drawString(2, 3, "Exis");
+        } else{
+            u8x8.drawString(3, 3, "No");
+        }
+        for(int i=0;i<100;i++){
+            digitalWrite(BuzzerPin,HIGH);
+            delay(1);
+            digitalWrite(BuzzerPin,LOW);
+            delay(1);
+        }
+    } else {
+        u8x8.clearDisplay();
+    }
+    // delay(200);
+}

examples/Unit/ADC_ADS1100/ADC_ADS1100.ino

@@ -0,0 +1,80 @@
+/*
+    hardware: M5Stack unit ADC
+    connect: PORTA(21, 22) or PORTC(17, 16)
+*/
+#include <M5Stack.h>
+#include <Wire.h>
+#include "ADS1100.h"
+
+ADS1100 ads;
+
+void setup(void)
+{
+    M5.begin(true, false, false);
+    Serial.begin(115200);
+
+    M5.Lcd.fillScreen(BLACK);
+    M5.Lcd.setTextColor(ORANGE);
+
+    // The address can be changed making the option of connecting multiple devices
+    ads.getAddr_ADS1100(ADS1100_DEFAULT_ADDRESS);   // 0x48, 1001 000 (ADDR = GND)
+
+    // The ADC gain (PGA), Device operating mode, Data rate
+    // can be changed via the following functions
+
+    ads.setGain(GAIN_ONE);          // 1x gain(default)
+    // ads.setGain(GAIN_TWO);       // 2x gain
+    // ads.setGain(GAIN_FOUR);      // 4x gain
+    // ads.setGain(GAIN_EIGHT);     // 8x gain
+
+    ads.setMode(MODE_CONTIN);       // Continuous conversion mode (default)
+    // ads.setMode(MODE_SINGLE);    // Single-conversion mode
+
+    ads.setRate(RATE_8);            // 8SPS (default)
+    // ads.setRate(RATE_16);        // 16SPS
+    // ads.setRate(RATE_32);        // 32SPS
+    // ads.setRate(RATE_128);       // 128SPS
+
+    ads.setOSMode(OSMODE_SINGLE);   // Set to start a single-conversion
+
+    ads.begin();
+}
+
+void loop(void)
+{
+    byte error;
+    int8_t address;
+
+    address = ads.ads_i2cAddress;
+    // The i2c_scanner uses the return value of
+    // the Write.endTransmisstion to see if
+    // a device did acknowledge to the address.
+    Wire.beginTransmission(address);
+    error = Wire.endTransmission();
+    if (error == 0)
+    {
+        int16_t result;
+
+        Serial.println("Getting Differential Reading from ADS1100");
+        Serial.println(" ");
+        result = ads.Measure_Differential();
+        Serial.print("Digital Value of Analog Input between Channel 0 and 1: ");
+        Serial.println(result);
+        M5.Lcd.fillScreen(BLACK);
+        char data[20] = { 0 };
+        sprintf(data, "%d", result);
+        M5.Lcd.drawCentreString(data, 160, 100, 4);
+        Serial.println(" ");
+        Serial.println("        ***************************        ");
+        Serial.println(" ");
+    }
+    else
+    {
+        Serial.println("ADS1100 Disconnected!");
+        Serial.println(" ");
+        Serial.println("        ************        ");
+        Serial.println(" ");
+    }
+
+    delay(1000);
+}