1.SPI-Blink
This example demonstrates the use of shift registers as if they were just normal IO pins. The SPI interface is used because it's easy and fast.
- Boards:
- AVR, AVR USB, Nano Every, Nano 33 IoT, Nano 33 BLE, Pi Pico, Due, Teensy 3.x, ESP8266, ESP32
Connections
- SS: 74HC595 ST_CP
- MOSI: 74HC595 DS
- SCK: 74HC595 SH_CP
Connect an LED (and series resistor) between the first output of the shift register and ground.
Remember to connect the enable pin of the shift register to ground and the master reset pin to Vcc in order to enable it.
Behavior
This sketch will blink the LED once a second.
Written by PieterP, 2018-09-01 https://github.com/tttapa/Arduino-Helpers
using namespace ExtIO;
SPIShiftRegisterOut<8> sreg {SPI, SS, MSBFIRST};
const pin_t ledPin = sreg.pin(0);
void setup() {
sreg.begin();
}
void loop() {
delay(500);
delay(500);
}
constexpr PinStatus_t LOW
constexpr PinStatus_t HIGH
constexpr PinMode_t OUTPUT
Dummy header file for Arduino builder.
void pinMode(pin_t pin, PinMode_t mode)
An ExtIO version of the Arduino function.
void digitalWrite(pin_t pin, PinStatus_t val)
An ExtIO version of the Arduino function.
uint16_t pin_t
The type for Arduino pins (and ExtendedIOElement pins).