Introduction to IoT
LAB Exercises
Karel Slavicek
Vaclav Oujezsky
2024
IoT LAB - Outline
●
Shift register
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PWM
Hardware Overview
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MCU board - STM32
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Communication board – CANBus
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Application board – PushButton + ShiftRegister
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Application board – Oled
STM32 pinout
Shift register
int latchPin = PB13; // GPIO6-PB13
int clockPin = PB15; // GPIO5-PB15
int dataPin = PB14; // GPIO7-PB14
byte leds = 0; // Variable to hold the pattern of which LEDs are currently turned on or off
void setup(){
pinMode(latchPin, OUTPUT);
pinMode(clockPin, OUTPUT);
pinMode(dataPin, OUTPUT);}
void loop()
{
leds = 0; // Initially turns all the LEDs off, by giving the variable 'leds' the value 0
delay(50);
for (int i = 0; i < 8; i++) // Turn all the LEDs ON one by one.
{
bitSet(leds, i); // Set the bit that controls that LED in the variable 'leds'
digitalWrite(latchPin, LOW);
for(int i = 7; i >= 0; i--){
digitalWrite(clockPin, LOW); int val = leds & (1 « i);
digitalWrite(dataPin, val);
digitalWrite(clockPin, HIGH);};
digitalWrite(latchPin, HIGH);
delay(500);
}
}
int latchPin = PB13; // GPIO6-PB13
int clockPin = PB15; // GPIO5-PB15
int dataPin = PB14; // GPIO7-PB14
byte leds = 0; // Variable to hold the pattern of which LEDs are currently turned on or off
void loop()
{
leds = 0; // Initially turns all the LEDs off, by giving the variable 'leds' the value 0
updateShiftRegister();
delay(500);
for (int i = 0; i < 8; i++) // Turn all the LEDs ON one by one.
{
bitSet(leds, i); // Set the bit that controls that LED in the variable 'leds'
digitalWrite(latchPin, LOW);
shiftOut(dataPin, clockPin, LSBFIRST, leds);
digitalWrite(latchPin, HIGH);
delay(500);
}
}
Now it is the time for
your own experiments!