c2-utopia/lib/Adafruit BusIO/examples/i2c_readwrite/i2c_readwrite.ino

42 lines
1.0 KiB
C++

#include <Adafruit_I2CDevice.h>
#define I2C_ADDRESS 0x60
Adafruit_I2CDevice i2c_dev = Adafruit_I2CDevice(I2C_ADDRESS);
void setup() {
while (!Serial) { delay(10); }
Serial.begin(115200);
Serial.println("I2C device read and write test");
if (!i2c_dev.begin()) {
Serial.print("Did not find device at 0x");
Serial.println(i2c_dev.address(), HEX);
while (1);
}
Serial.print("Device found on address 0x");
Serial.println(i2c_dev.address(), HEX);
uint8_t buffer[32];
// Try to read 32 bytes
i2c_dev.read(buffer, 32);
Serial.print("Read: ");
for (uint8_t i=0; i<32; i++) {
Serial.print("0x"); Serial.print(buffer[i], HEX); Serial.print(", ");
}
Serial.println();
// read a register by writing first, then reading
buffer[0] = 0x0C; // we'll reuse the same buffer
i2c_dev.write_then_read(buffer, 1, buffer, 2, false);
Serial.print("Write then Read: ");
for (uint8_t i=0; i<2; i++) {
Serial.print("0x"); Serial.print(buffer[i], HEX); Serial.print(", ");
}
Serial.println();
}
void loop() {
}