Delete i2c_slave_with_sensor_reading

pull/5/head
alanbjohnston 7 years ago committed by GitHub
parent 00fa825752
commit 9d4b18b997
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@ -1,75 +0,0 @@
#include <Wire.h>
#define REGISTER_0 0x00
#define REGISTER_1 0x01
#define REGISTER_2 0x02
#define REGISTER_3 0x03
#define I2C_ADDRESS_SELF 0x4B
unsigned int reg_0_value = 41151;
unsigned int reg_1_value = 0;
unsigned int reg_2_value = 0;
unsigned int reg_3_value = 0;
uint8_t master_reg; // I2C master read register
uint8_t slave_reg; // I2C slave read register
void setup()
{
Serial.begin(9600); //Begins Serial communication
Serial.println("Setup for sensor");
Wire.begin(I2C_ADDRESS_SELF); // join i2c bus
Wire.setClock(400000); // set I2C clock for full speed
Serial.begin(9600); // start serial for output
digitalWrite(A4, LOW);
digitalWrite(A5, LOW);
Wire.onRequest(requestEvent);
Wire.onReceive(receiveEvent);
pinMode(LED_BUILTIN, OUTPUT);
Serial.println("Starting");
}
void loop()
{
delay(1000);
Serial.println("Read sensor value");
reg_0_value = 1; // set register 0 value to the sensor value
reg_1_value += 1; // increment a count of how many values read
}
void receiveEvent(int bytes) {
// Slave reads the first byte to determine which register is concerned
slave_reg = Wire.read();
Serial.print("Slave read register ");
Serial.println(slave_reg);
}
void requestEvent() {
// Slave uses the the register variable to know what to send back
digitalWrite(LED_BUILTIN, HIGH);
if (slave_reg == REGISTER_0) {
Wire.write((uint8_t *)&reg_0_value, sizeof(reg_0_value));
Serial.print("Slave writing value ");
Serial.println(reg_0_value);
} else if (slave_reg == REGISTER_1) {
Wire.write((uint8_t *)&reg_1_value, sizeof(reg_1_value));
Serial.print("Slave writing value ");
Serial.println(reg_1_value);
} else if (slave_reg == REGISTER_2) {
Wire.write((uint8_t *)&reg_2_value, sizeof(reg_2_value));
Serial.print("Slave writing value ");
Serial.println(reg_2_value);
} else if (slave_reg == REGISTER_3) {
Wire.write((uint8_t *)&reg_3_value, sizeof(reg_3_value));
Serial.print("Slave writing value ");
Serial.println(reg_3_value);
} else {
Serial.println("Slave unknown register");
}
delay(50);
digitalWrite(LED_BUILTIN, LOW);
}
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