2: Arduino Uno. Start and ConfigurePins methods to initialize our. Este pode ser INPUT, OUTPUT ou INPUT_PULLUP; que correspondem respectivamente a entrada, saída e entrada com pull-up ativado. In this tutorial, we will learn how to control a standard servo motor, to go back and forth across 180 degrees, using a. Copy. Digital Input. pinMode () The code makes the digital pin 13. Jadi ketika kita ingin menggunakan suatu pin sebagai input, maka kita tidak mesti menuliskan pinMode (nomorPin, INPUT); . Arduino Board with an ATmega168 or ATmega328 chip. Using Arduino. Schematics. The analog pins can be used identically to the digital pins, using the aliases A0 (for analog input 0), A1, etc. If you use pinMode the Arduino reads the translation vom the Arduino pin number to the register/bit pair from the flash memory which needs some time. Tried also PIN1 and reports 1023 but doesn't detect any input (value doesn't change). Done! Circuit to control servo via light direction detector. 1 volts on the ATmega168 or ATmega328P. Tutorial Arduino Digital dan Analog. The Arduino Web Editor allows you to write code and upload sketches to any official Arduino board from your web browser (Chrome, Firefox, Safari and Edge) after installing. After a call to analogWrite (), the pin will generate a steady rectangular wave of the specified duty cycle until the next call to analogWrite () (or a call to digitalRead () or digitalWrite ()) on the same pin. Arduino AnalogRead function is used to measure the voltage between 0 to 5 volts and converts it into a digital value between 0 to 1023. mode: INPUT, OUTPUT, or INPUT_PULLUP. Pada papan Arduino Uno terdapat 20 pin I/O yaitu 14 pin digital dan 6 pin analog. Allowed data types: int. At startup, pins are configured as INPUT. However, the input pullup resistor is a completely separate function, and can interfere with ADC readings. Hello, Since all the digita pins are in use I want to use the A0 as digital output to light up an IR led. The complete Arduino code. value does not change. the value used as the top of the input range). analogWriteResolution () is an extension of the Analog API for the Arduino Due. LED strip can be categorized in to the addressable LED strip and non-addressable LED. PWM value varies from 0 to 255. Arduino pinMode() Function. Arduino Mega Board. Arduino boards contain a multichannel, 10-bit analog to digital converter. Semua analog I/O dapat juga berfungsi sebagai Digital I/O kecuali pada Arduino Nano, Pro Mini di A6 dan A7 yang hanya berfungsi sebagai analog I/O. Problem solved! When you set the mode to INPUT_PULLUP, an internal resistor – inside the Arduino board – will be set between the digital pin 4 and VCC (5V). Arduino Uno has a total of 14 GPIO pins, out of. Additionally, the INPUT mode explicitly disables the internal pullups. void analogWrite(uint8_t pin, int val) { // We need to make sure the PWM output is enabled for those pins // that support it, as we turn it off when digitally reading or // writing with them. These two digital pins of Arduino control the direction of the motor. 1以降では第二引数をINPUT_PULLUP とすることでプルアップ抵抗を有効にすることができます。本記事は、IOピンを高速かつ簡単に設定できるポート・レジスタについてです。ArduinoのPIN状態を設定するコマンドは「pinMode()」「digitalWrite()」「digitalRead()」。ある程度スケッチ（コード）を描くのに慣れてきた場合、一つ一つのPINを設定するのも煩雑に感じたり、ピンの設定を高速化したいと. Writes an analog value ( PWM wave) to a pin. สำหรับ Arduino uno r3 มีขาสำหรับ analog ตั้งแต่ A0-A5 รวม 6 ขา ซึ่งเราสามารถกำหนดให้เป็นขาแบบ digital ได้เช่นกัน โดยหากกำหนดเป็น digital ก็จะทำงานคล้าย. The pins on the Arduino can be configured as either inputs or outputs. Differential signal method works by creating a differential voltage by using a positive and negative 5V. In this example, let’s build an Arduino project which plays a melody on the buzzer connected to pin 3. analogWrite(thisPin, brightness); delay(2); } This loop subtracts a point from the brightness variable, dimming the LED back down to 0. For displaying text on the screen, you can do most everything in 4-bit mode, so example shows how to control a 16x2 LCD in 4-bit mode. Analog joysticks are typically calibrated so that the centre position produces a voltage of zero. 3V of Arduino. //this we can do for digital pins int pin = 0; void someMethod () { pinMode (pin,INPUT); } arduino. As of Arduino 1. Arduino Uno has a total of 14 GPIO pins, out of which 6. INPUT. I'm very new to both arrays so I'm a bit confused. The sound sensor is capable of detecting the presence of sound in the surrounding environment. Pins A0 to A5 are digital pins with analog read as a special function. pin#–> pin berapa yang akan kita gunakan. The analog input pins can be used as digital pins, referred to as A0, A1, etc. If you are working with analogWrite in Arduino then you wouldn’t want to write the number from 0-255 for taking analog voltages sometimes. If you already used a pin for another task (e. The Arduino GPIO (digital IO) pins can be configured as output pins to be used for driving output devices (such as LEDs, motors, relays, etc). In the first two examples we will detect the vibration and display the. See the change of LED's state. Now looking at the reference page on the "high low tech" website they give each pin a number name (like "Pin 2") but they are also analog. When you touch the transistor, the digital output will send a HIGH signal, turning the Arduino’s LED on. You can use this circuit starter anytime you want to fade an LED. At a time, one pin can take only one task. 3 volts (on 3. Additionally, the INPUT mode explicitly disables the internal pullups. arduino. When porting code from Arudino, pin numbers are numbered (0, 1, 2,. The Arduino Due supports analogWrite() on pins 2 through 13, plus pins DAC0 and DAC1. -1. Pins Configured as INPUT. The analog input pins can be used as digital pins, referred to as A0, A1, etc. delay(). 1 ist es möglich, den internen Pull-Up-Widerstand mit dem Modus INPUT_PULLUP zu setzen. 3VHello all, brand new to Arduino and playing with an Uno, just a quick question I haven't been able to find an answer to: are all pins set to 'output' mode by default?. 2019-08-07. In practice the ping 7,8,9,10 will control hydraulic directional solenoid valve. modo: o modo do pino. O Arduino DUE suporta analogWrite () nos pinos 2 a 13, mais pinos DAC0 e DAC1. Use pinMode (pinX, INPUT_PULLUP); anytime you are using a switch/button that connects the pin the Gnd when pressed; on analog inputs where the source can overcome the 30K to 50K pullup resistance and you don't want the input to float around; or use a 100K pullup and 100k pulldown to hold the pin at 2. 4V, and 490 sounded like a better number than 491, which is actually closer to 2. A common confusion amongst beginners is mixing up the analog output pins and the analog input pins. Using Arduino directly works without any issue for all 19. berikut ini adalah syntax yang bisa gunakan ketika menggunakan pin yang ada di arduino. This tutorial teaches you to control LED using Arduino UNO or Genuino UNO. Step 2: Let us connect the DIP switch to the Arduino UNO. 3. Write a HIGH or a LOW value to a digital pin. The arduino site Arduino Site states the following : Pullup resistors The analog pins also have pullup resistors, which work identically to pullup resistors on the digital pins. If the pin has been configured as an OUTPUT with pinMode(), its voltage will be set to the corresponding value: 5V. Description. Is there a way to set pinMode for multiple inputs at once?Pull-up resistors. The Arduino pinMode() function sets the behavior of a specific digital IO pin to behave as an output pin or an input pin. // potentiometer connected to analog pin 3 int val = 0; // variable to store the read value void setup() { pinMode(ledPin, OUTPUT); // sets the pin as. Diferente dos pinos PWM, DAC0 e DAC1 são conversores Digital-Analógicos, e saídas analógicas legítimas. - (GND) pin: is a ground connection. สำหรับ Arduino uno r3 มีขาสำหรับ analog ตั้งแต่ A0-A5 รวม 6 ขา ซึ่งเราสามารถกำหนดให้เป็นขาแบบ digital ได้เช่นกัน โดยหากกำหนดเป็น digital ก็จะทำงานคล้าย. Le schede Arduino più vecchie con un ATmega8 supportano analogWrite () solo sui pin 9, 10, e 11. The main difference between pinMode and accessing the registers directly is the timing. NOTE: Digital pin 13 is harder to use as a digital input than the other digital pins because it has an LED and resistor attached to it that's. As of Arduino 1. Perhaps the easiest to use is an analog sensor, where we communicate a range of values through altering the voltage input fed into an Arduino analog pin (usually between 0-5 volts). Viewed 67 times. NOTE: Digital pin 13 is harder to use as a digital input than the other digital pins because it has an LED and resistor attached to it that's. As mentioned above, we first need to replace pinMode (). Can be used to light a LED at varying brightnesses or drive a motor at various speeds. They may be configured for analog input, digital input. pinMode() - Documentação de Referência do Arduino Esta página também está disponível em outros 2 idiomas. The exception is the Arduino Nano, Pro Mini, and Mini’s A6 and A7 pins, which can only be used as analog inputs. Introduction. When you are using a Mac with Arduino v1. Except for the very first one, each ADC conversion takes 13 ADC clock cycles, i. Unlike the PWM pins, DAC0 and DAC1 are Digital to Analog converters, and act as true analog outputs. 1, it was possible to configure the internal pull-ups in the following manner: 1 pinMode(pin, INPUT); // set pin to input. This function converts the value of the voltage on an analog input pin and returns a digital value from 0 to 1023, relative to the reference value. void setup() { pinMode(A5, OUTPUT); // sets the digital pin A5 as output } void loop() { digitalWrite(A5, HIGH); // sets the digital pin A5 on delay. Unlike the PWM pins, DAC0 and DAC1 are Digital to Analog converters, and act as true analog outputs. Add a resistor of 4. Configures the reference voltage used for analog input (i. begin (9600); } void loop () { int light = analogRead (photoPin); Serial. Description. analogRead(pin)Arduino pinMode, sintaxis y ejemplos. a rduino-based learning packages multifunction. 56 volts. 3 V (for 3. Can be used to light a LED at varying brightnesses or drive a motor at various speeds. Also the "analog" pins are perfectly normal digital pins too, if you use the numbers 14. The modes available to any given pin is dependent upon pin type. There's a couple of things wrong with your code, though, which you should address: Use digitalWrite () not analogWrite (). A0 is a defined as a number (somewhere depending on the actual hardware), on an Uno/Nano it translates to 14, and when executing pinMode it translates to the appopriate bit in the correct DDRx register. In the case of the pull-up resistor, the Arduino pin is connected to 5v or 3. In my code I need to set five pins to output mode. The analogWrite function provides a simple interface to the hardware PWM, but doesn't provide any control over frequency. The usual method is to use the Arduino’s analog pins to send PWM signals to the module. The Arduino DUE supports analogWrite () on pins 2 through 13, plus pins DAC0 and DAC1. Step 3: Complete the DIP switch connection. This one could be the simplest example of PWM control using arduino. 12 220 ohm resistors. The pinMode() function is used to configure a specified pin in Arduino to behave either as an input or an output. In order to configure a digital IO pin as an output, we need to use the pinMode() function. Ketiga fungsi ini digunakan untuk menyederhanakan perintah yang berhubungan dengan pin I/O digital pada board Arduino. Description. For example, a digital pin may be configured for input, output, and for some digital pins, PWM output operation. For example, the code would look like this to set analog pin 0 to an output, and to set it HIGH: 1 pinMode(A0, OUTPUT); 2 digitalWrite(A0, HIGH); Description. More About. 0. 3V) para valores inteiros entre 0 e 1023. When porting code from Arudino, pin numbers are numbered (0, 1, 2,. Is there a way to set the initial output state to high? The pinmode documentation supports only input, input_pullup, and output. Unable to use analog pins as digital inputs. Supply it the minimum and maximum possible values of the A/D output, and the minimum and maximum inputs to the PWM. pin : Nomor pin Arduino Board. Forum 2005-2010 (read only) Hardware Interfacing. On an atmega328 Arduino pin 14 ( or A0 ) is. 4. But I find that in my project, it doesn't perform as stated. One complication is that the Arduino functions give each pin an "Arduino" pin number, and you have to look at a pin map to figure out which. See the change of. Step 4: Connect GND to the DIP Switch. All other calls take 0. mode: INPUT, OUTPUT, or INPUT_PULLUP. See the Digital Pins page for details on the functionality of the pins. To learn how to read data from a potentiometer, and display it in the Serial Monitor, visit the Analog Read Serial example. An Arduino pin can be configured to operate in one of several modes. 1 pinMode(A0, OUTPUT); 2 digitalWrite(A0, HIGH); Analog Input pins are used to measure a voltage. Syntax pinMode (pin, mode) Parameters pin: the Arduino pin number to set the mode of. Reading a Potentiometer (analog input) A potentiometer is a simple knob that provides a variable resistance, which we can read into the Arduino board as an analog value. The connection to the internal resistor is not "automagically" disconnected by analogRead (). An Arduino pin can be configured to operate in one of several modes. This simply gives you a range between 0-1023 (a 10-bit resolution). 3V Arduino boards) INTERNAL: a built-in reference, equal to 1. 2- Continuously read the analog input pin for the potentiometer. Kann z. Arduino pinMode, sintaxis y ejemplos. And using it, digitalWrite (A0, HIGH/LOW). Vladuinoire June 6, 2020, 8:42pm 1. Arduino: Manual de Programación 4 control de flujo if if… else for while do… while E/S digitales pinMode(pin, mode) digitalRead(pin) digitalWrite(pin, value) E/S analógicas. See the Digital Pins page for a more complete description of the functionality. Turning the internal pullup on with pinMode(Ax, INPUT_PULLUP) makes it more clear what you are doing, I think. Hardware Required. Description. Based on this, the most that we could ever possibly input into an analog input while allowing for simultaneous presses would be 10 buttons to 1 analog input. Arduino DUE supporta analogWrite () sui pin da 2 a 13, oltre che sui pin DAC0 e DAC1. noTone() pulseIn() shiftIn() shiftOut() tone(). In the void loop section we have used analogWrite function and given it pin number 3 and analog value 128 as parameter. 3V on the TOUT pin will give a value of 1023. The analog input pins can be used as digital pins, referred to as A0, A1, etc. I'm using an arduino uno and some 7 segment displays to count from 0000 to 9999, i'm using the decoder cd4511 to save some ports, but in order to have the thousands in my counter, i needed to use the analog pins just like this: the leftmost display is connected to the analog pins. Isso significa que este irá mapear tensões entre 0 e a tensão operacional (5V or 3. Cú pháp pinMode(pin, mode). John_Ville6: i'm programming arduino to count pulse in Analog input. 7k* (check in step 4 the calculation of the resistor) to the circuit, and try the below code. 0V on the TOUT pin will give a value of 0. The chips used on the Arduino board (the ATmega8 and ATmega168) have three ports: B (digital pin 8 to 13) C (analog input pins) D (digital pins 0 to 7) Each port is controlled by three registers, which are also defined variables in the arduino language. Methode 2. It is a latch type (Flip-flop) register; it receives data from the Processor Unit (PU) for the output port-lines (PB5-PB0). pinMode(). pinMode(A0, INPUT_PULLUP); // set pull-up on analog pin 0. The options are: DEFAULT: the default analog reference of 5 volts (on 5V Arduino boards) or 3. The analogRead() function takes care of setting up the pin. อุปกรณ์ 1. 1 ist es möglich, den internen Pull-Up-Widerstand mit dem Modus INPUT_PULLUP zu setzen. This is done by “mapping” the voltage. The Arduino pinMode() function sets the behavior of a specific digital IO pin to behave as an output pin or an input pin. 1. The modes available to any given pin is dependent upon pin type. pinMode () sets up a pin for use as a digital input, not analog input. If you try to take an analog. Analog Write with 12 LEDs on an Arduino Mega. For example, the code would look like this to set analog pin 0 to an output, and to set it HIGH: 1 pinMode(A0, OUTPUT); 2 digitalWrite(A0, HIGH); Hi all, I was wondering if I can use pinMode on analog inputs without problems. They are enabled by issuing a command such as digitalWrite(A0, INPUT_PULLUP); // set pullup on analog pin 0 Be aware however that turning. e. println(sensorValue); Now, when you open your Serial Monitor in the Arduino Software (IDE) (by clicking the icon that looks like a lens, on the right. See Also: pinMode(). A pinMode() call is included inside this function, so there is no need to set the pin as an output before executing this code. Analog IO. Actually I've found that I do need to set the pinMode to input, else analogRead does not work. I am using a Nucleo 64 L476RG card, connects the A3 pin, dac out, to PC4. If the button is pressed, Arduino's pin state is HIGH. Controlling the LED Brightness with PWM. 56 volts. Arduino board; Potentiometer It is important to note that a majority of Arduino analog pins, may be configured, and used, in exactly the same manner as digital pins. Es wird empfohlen, den Pin mit pinMode () auf INPUT_PULLUP zu setzen, um den internen Pull-Up-Widerstand zu nutzen. The simplest method to ensure a defined level of an unused pin, is to enable the internal pull-up. digitalRead(uint8_t pin); Read the voltage level on the specified pin. In this case, the pull-up will be disabled during reset. The Arduino programming language Reference, organized into Functions, Variable and Constant,. The system automatically sets the pinMode when using a peripheral library like analogRead(), analogWrite(), SPI or I2C, so you don't have to. Arduino microcontrollers have plenty of I/O pins, some of which have an “analog” capability. La función de Arduino pinMode permite configurar a cada pin, de forma individual, como entrada o como salida. 1, it is possible to enable the internal pullup resistors with the mode INPUT_PULLUP. 1, it is possible to enable the internal pullup resistors with the mode INPUT_PULLUP. e. For example, directly above the Arduino Uno logo you can spot an “8” next to a pin located at the edge of a 10 pin header. The forLoop doens't increment if I use A1 (analog pins). 1 volts on the ATmega168 or ATmega328P and 2. 1. Saya akan membahas ketiga fungsi di atas satu per satu secara lengkap, mulai dari fungsinya, penggunaannya. You do not need to call pinMode() to set the. OUTPUT); pinMode (ANALOG_WRITE_PIN_UNDER_TEST, OUTPUT); } // the loop function runs over and. Step 2: Glitches With the Arduino Software. Note: This tutorial uses an Arduino UNO, but you can use any official Arduino. Untuk menerima input digital yang masuk ke pin, kita gunakan fungsi digitalRead (nomorPin). Step 7: The complete connection. Analog pins are input only, so it isn't clear what you are trying to do. I am trying to use Arduino analog pins (A0-A5) as digital pins (D14-D19) with pyfirmata. as such, their output is either 0 or 1, nothing in between, with the chance of being 1 equal the duty cycle. arduino 2. const int kPinBtn = A0; // Push-Button connected to Analog pin A0 const int kPinLED = 13; // LED connected to to Digital Pin 13 void setup () { pinMode (kPinBtn, OUTPUT); // Generally, in push-button we take INPUT as a parameter but here we take OUTPUT because ANALOG PIN digitalWrite (kPinBtn,. MAX485 RS485 Transceiver Module. 0. NOTE: Digital pin 13 is harder to use as a digital input than the other digital pins because it has an LED and resistor attached to it that's. It will use the LED as an indicator for telling if the device is in active state or sleep state. If the pin is configured as an INPUT, digitalWrite () will enable ( HIGH) or disable ( LOW) the internal pullup on the input pin. Add PWM output to your sketch using the analogWrite () function. Configures the specified pin to behave either as an input or an output. In fact the 14. Board. Additionally, the INPUT mode explicitly disables the internal pullups. Arduino's pin A0 to A5 can work as analog input. The Arduino programming language Reference, organized into Functions,. pinMode (), digitalRead (), dan digitalWrite (), adalah sebuah fungsi untuk mengakses pin digital yang ada pada Arduino. A sequences of RCB LED connected together creates the RGB LED Strip. You do not need to call pinMode () to set the pin as an output before calling analogWrite (). Lalu bisa kita manipulasi sesuai dengan kebutuhan kita. STM32 core based on ST HAL automation moved this from To do to Done on Nov 16, 2018. So the voltage for 490 corresponds to 2. So you will see you can have serial communication coming from pins 0 & 1 or 16 & 17 or 16 & 17. AnalogWriteMega - Fade 12 LEDs on and off, one by one, using an Arduino Mega board. The up/down and left/right directions are typically mapped to the X and Y axes, respectively. . Syntax analogWrite (pin, value) Parameters pin: the Arduino pin to write to. println("value = "); Serial. Unlike the PWM pins, DAC0 and DAC1 are Digital to Analog converters, and act as true analog outputs. PE3: Port 3 của cảng E. Board. Ngoài ra, chế độ INPUT vô hiệu hóa một cách rõ ràng điện trở pullups nội bộ. The Arduino supports PWM on a subset of its output pins. . Notes and Warnings. Normaly for digital pins I first define the pin number (eg Pin8) and then put the led HIGH or LOW:Description. for loop() . I do some initial checks then power the product up and read the operating voltage. 3V input, to a 0 to 1. Given that I have a motor shield on top of my arduino UNO clone I only have 4 pins left. Arduino Analog Pins As Digital Output. Nah untuk. cc You do not need to call pinMode () to set the pin as an output before calling analogWrite (). Arduino pinMode() Function. The water level sensor has 3 pins: S (Signal) pin: is an analog output that will be connected to one of the analog inputs on your Arduino. Calibration - Define a maximum and minimum for expected analog sensor values. e. {// initialize digital pin 9 as an output. It is not necessary to use A0 to refer to analog pin 0. by mlundin » Wed Jun 02, 2021 1:35 pm. When you touch the transistor, the digital output will send a HIGH signal, turning the Arduino’s LED on. The analogWrite function has nothing to do with the analog pins or the analogRead function. int button = 5; //button pin, connect to ground as button int press = 0; void setup () { pinMode (13, OUTPUT); //LED on pin. println(analogRead(A5)); } the analog input is connected to the breadboard via a 220 ohm resistor. Board. If the pin isn’t connected to anything, digitalRead () can return either HIGH or LOW (and this can change randomly). From Arduino 1. As of Arduino 1. Beschreibung. The Joystick is having two potentiometer inside it, one is for X-axis movement and another is for Y-axis movement. noTone() pulseIn() pulseInLong() shiftIn(). Ketiga fungsi ini digunakan untuk menyederhanakan perintah yang berhubungan dengan pin I/O digital pada board Arduino. The analogRead() function takes care of setting up the pin. pinMode( x , y ); คือคำสั่งที่มีไว้สำหรับกำหนดการทำงานของ pin ที่ต้องการใช้งาน. For the brave few interested in the intricacies of programming in C, Kernighan and Ritchie’s The C Programming Language, second edition, as well as Prinz and Crawford’s C in a Nutshell, provide Yes, Arduino analog pins can be used as digital pins. Arduino digitalRead Analog Pins. Share. 2 digitalWrite(pin, HIGH); // turn on pullup resistors. A função analogWrite () nada tem a ver com os. However, the mode INPUT will set your IO pin in input mode and explicitly disable the internal pull-up resistor. setup(). 1, it was possible to configure the internal pull-ups in the following manner: 1 pinMode(pin, INPUT); // set pin to input. The 5V pin will be enabled if the pads marked VUSB are shorted, by soldering them. The. Extend GPIO mode. 0049 volts (4. Task 4: Power on LED 4 if the potentiometer value is greater than 512. Task 1: Blink LED 1 every second. 1. I was trying to write my own code that does the following: -read analog inputs from 5 channels (pins 19/23/24/25/26), read the inputs from SCL/SDA IMU and then transmit. There are two solutions: Use the pin as a open-collector pin as in the answer of VE7JRO. Arduino IDE (online or offline). Moreover,. DCA Pro Transistor Tester Review | Workbench Wednesdays. Unlike the PWM pins, DAC0 and DAC1 are Digital to Analog converters, and act as true analog outputs. Programming Questions. The further the lever is moved, the higher the voltage. pinMode(GPIO5, OUTPUT); digitalWrite(GPIO5, LOW); delay(500); int value = analogRead(A0); pinMode(GPIO5, INPUT); The other way to allow current to flow through the target sensor is to write digital LOW to the other pin. Konfiguriert den spezifizierten Pin als Input oder Output. 2 digitalWrite(pin, HIGH); // turn on pullup resistors. The analog input pins can be used as digital pins, referred to as A0, A1, etc. acquire analog signals from pin. The text of the Arduino reference is licensed under a Creative Commons Attribution-ShareAlike 3. Fade - Demonstrates the use of. You will see: DC motor is speeded up and then rotates at the maximum speed 1 second. There is no single "value" for it, it's constantly changing. 3V input, to a 0 to 1. In Arduino Uno, I noticed that when I set a PIN to output, the default initial state is low. Arduino programming language can be divided in three main parts: functions, values (variables and constants), and structure. zoomkat December 17, 2012, 5:26am 8. I could find no mapping of pins anywhere I looked between what the Arduino IDE would accept and the pin [name/number] on the "blue pill". 0. The DDR register, determines whether the pin is an INPUT or OUTPUT. 1 pinMode (pin, INPUT); //configures pin as an input. วันนี้เราจะมาแนะนำฟังก์ชัน pinMode, digitalWrite, และ delay . After a call to analogWrite(), the pin will generate a steady square wave of the specified duty cycle until the next call to analogWrite(). Yes, the analog pins must be addressed using A0, A1,.