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Arduino programming language functions11/19/2023 ![]() This function has three parameters x,a,b. This function is used to set the number within a specified range. correct way of using this function includesĪ++ //keep other math outside the function An example code: abs(a++) // this form od abs results into incorrect result. Likewise, the number x can be less than 0. The number x can be greater than 0 or equal to 0. This function has one parameter, the number x. This function is used to calculate the absolute value of a given number. PinMode(13, OUTPUT) //this is used to set the pin 13 to output.ĭigitalWrite(13,HIGH) //setes the PIN 13 to HIGHĭigitalWrite(13, LOW) // this sets the dPIN 13 to off The second parameter mode is INPUT, OUTPUT or INPUT_PULLUP. The parameter pin is used to set the pin with the defined PIN. Parameter of this function is pin and mode. This function is used to set the PIN either as input or as output. PinMode(13, OUTPUT) // this is used to set the OUTPUT to digital pin 13ĭigitalWriter(13, HIGH) // this sets the digital PIN 13 to HIGHĭigitalWrite(13,LOW) // this is used to set the PIN 13 The parameter Pin is used to set the PIN, and the parameter value is either HIGH or LOW. There are two parameters of this function, first, pin, and second, value. The LED appears DIM if pinMode() is set to OUTPUT, and the connection of an LED to pin is not done. To set the internal pull-up resistors, the pinMode( ) is set to INPUT_PULLUP. ![]() If the PIN is set to INPUT, the function digitalWrite( ) will be HIGH or LOW. The 3.3V value is used for the 3.3V board for HIGH, and 0V is used for LOW. For example, if the PIN is set to OUTPUT using pinMode( ), its voltage is set to 5V or 3.3V. This function is used to assign a HIGH or LOW value to the digital pin. If the pin is in unconnected mode, the digitalRead( ) can return either HGH or LOW. Val = digitalRead(inPin) // this is used to read the pinĭigitalWrite( led_Pin, val) //this is used to set the button value to LED Pin_Mode(in_Pin, INPUT) // it sets the input pin to 7 Pin_Mode(led_Pin, OUTPUT) //it sets the output pin to 13 Int val = 0 //this is used to save the value read. Int in_Pin = 7 //this connects pushbutton to pin 7 Example code: Int led_pin =13 //this connects LED to pin 13 To work with Arduino boards and carry out required computations following functions are supported by Arduino programming language: Digital I/O functions: The Arduino programming language can be divided into three main sections: functions, values (consisting of Arduino variables and Arduino constants), and structure. To build an Arduino breadboard circuit following components are required: Time duration in Arduino is measured in milliseconds.Īrduino is also used to blink the LED and Fading-in and Fading-out of the LED.Īrduino program works with breadboard circuits. this is used to specify the switch to OFF all the components associated with a particular ‘pin-number’ this switch ON all the components that is associated to particular pin number. This loop( ) is similar to loop statements of for loop, while loop, and do-while loop in C programming language.Īn example of loop( ) function in Arduino programming language is: The loop( ) function is used to execute the set of programming instructions repeatedly. The execution block contains loop( ) function. The execution block is executed to read inputs, to trigger output, this block is also used to check conditions etc. When the setup( ) block is executed successfully, then the execution block is executed. PinMode (pin-number, INPUT) //is used to set the PIN as the input. PinMode (pin-number, Output) // this is used to initialize the pin-number as the output. The setup() block is included even if there exist no programming instructions within the Arduino programming block. This is the mandatory function to be included in each Arduino programming structure. setup() block is called to initialize the pin modes and begin serial communication. setup() block is called only one time in the execution of the Arduino programming structure. The block to be executed in the Arduino programming structure is the setup() block. Setup( ) is known as preparation block and loop( ) is known as execution block. Programming instruction within each block is enclosed within curly braces. One block is ‘Preparation’, and the second block is ‘Execution’. An Arduino program is developed using two blocks. Arduino program has a simple program structure.
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