#Serial terminal program to change vin serial
Wire.Arduino boards have built in support for serial communication on pins 0 and 1, but what if you need more serial ports? The SoftwareSerial Library has been developed to allow serial communication to take place on the other digital pins of your boards, using software to replicate the functionality of the hardwired RX and TX lines. If (value = HIGH) //Logic to set the value of x to send to master depending upon input at pin 2 Int value = digitalRead(buttonpin) //Reads the status of the pin 2 Void requestEvent() //This Function is called when Master STM32 wants value from slave Arduino If (a = 1) //Logic to turn Slave LED ON (if received value is 1) or OFF (if received value is 0) Void receiveEvent (int howMany) //This Function is called when Slave Arduino receives value from master STM32īyte a = Wire.read() //Used to read value received from master STM32 and store in variable a Wire.onRequest(requestEvent) //Function call when Master STM32 request value from Slave Arduino Wire.onReceive(receiveEvent) //Function call when Slave Arduino receives value from master STM32 Wire.begin(8) // join i2c bus with its slave Address as 8 at pin (A4,A5) PinMode(LED,OUTPUT) //Sets pin 7 as output Wire.endTransmission() // stop transmitting Wire.write(x) // sends the value x to Slave Wire.beginTransmission(8) // starts transmit to device (8-Slave Arduino Address) If(pinvalue=HIGH) //Logic for Setting x value (To be sent to slave Arduino) depending upon inuput from pin PA0
![serial terminal program to change vin serial terminal program to change vin](https://content.instructables.com/F8W/55T0/JH0TN6MZ/F8W55T0JH0TN6MZ.gif)
Int pinvalue = digitalRead(buttonpin) //Reads the status of the pin PA0 If (a=1) //Logic to turn Master LED ON (if received value is 1) or OFF (if received value is 0) Wire.requestFrom(8,1) // request bytes from slave arduino(8)īyte a = Wire.read() // receive a byte from the slave arduino and store in variable a Wire.begin() //Begins I2C communication at pin (B6,B7) PinMode(buttonpin,INPUT) //Sets pin PA0 as input Serial.begin(9600) //Begins Serial Communication at 9600 baud rate #include //Library for I2C Communication functions I2C Communication between STM32 and Arduino The complete coding for Master STM32 and Slave Arduino is given below with a demonstration video Now you can interface any I2C sensor with STM32 board. So this is how I2C communication takes place in STM32. When both the push buttons pressed simultanewolsy, then both the LEDs glow at the same time, and remains ON until the buttons are pressed Now when we press the push button at Slave side, the LED connected to Master turns ON (Red) and when button is released LED turns OFF.ģ. When we press the push button at Master STM32, the LED connected to Slave Ardiono turns ON (White).Ģ. Depending upon the received value from slave the Master LED is turned ON or OFF by using digitalwrite at pin PA1 and also serial print is used to print value in serial monitor.The received value is read using Wire.read() byte a = Wire.read() First we get the data from the Slave Arduino so we use requestFrom() with the slave address 8 and we request one byte.Next we start the I2C communication at pin (B6,B7).
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We Start Serial Communication at Baud Rate 9600.First of all we need to include the Wire library and softwire library for using I2C communication functions in STM32F103C8. In Master STM32 let’s see what’s happening:ġ. Complete programs for both the sides are given at the end of this project with a demonstration Video. This tutorial has two programs one for master STM32 and other for slave Arduino. It can be programmed using USB port without using FTDI programmer, to learn more about programming STM32 with Arduino IDE follow the link. The same library is used in programming STM32F103C8. The programming is similar to the Arduino code. These values are sent via I2C communication bus. To demonstrate I2C communication in STM32, we control the master STM32 LED by using slave Arduino push button value and control slave Arduino LED by using master STM32F103C8 push button value.
![serial terminal program to change vin serial terminal program to change vin](https://content.instructables.com/ORIG/F47/PDRI/ILJQATZI/F47PDRIILJQATZI.png)
Both boards are attached with an LED & a push button separately. In this STM32 I2C tutorial we will configure the STM32F103C8 as Master and Arduino as Slave. Then connect a Pull down resistor of 10k to the push button pins of both the board separately.Don’t forget to connect the Arduino GND and STM32F103C8 GND together.The following table shows the connection between STM32 Blue Pill and Arduino Uno for using I2C bus.