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#include <Wire.h> | |
#define DEV_ADDR 0x57 | |
#define START_ADDR 0x045C | |
#define LENGTH 4 | |
void setup() | |
{ | |
Serial.begin(57600); | |
Wire.begin(); | |
delay(1000); | |
Serial.println("Ready!"); | |
} | |
void loop() | |
{ | |
if(Serial.available() > 0) | |
{ | |
char c = Serial.read(); | |
switch(c) | |
{ | |
case 'r': | |
i2c_read(); | |
break; | |
case 'w': | |
i2c_write_one(); | |
Serial.println("Done!"); | |
break; | |
default: | |
Serial.println("Error!"); | |
break; | |
} | |
} | |
} | |
void i2c_read() | |
{ | |
Wire.beginTransmission(DEV_ADDR); | |
Wire.write((int)(START_ADDR >> 8)); // MSB | |
Wire.write((int)(START_ADDR & 0xFF)); // LSB | |
Wire.endTransmission(); | |
Wire.requestFrom(DEV_ADDR,LENGTH); | |
while(Wire.available()) | |
{ | |
byte val = Wire.read(); | |
if(val < 0x10) | |
Serial.print("0"); | |
Serial.print(val, HEX); | |
Serial.print(" "); | |
} | |
Serial.println(); | |
} | |
void i2c_write_one() | |
{ | |
Wire.beginTransmission(DEV_ADDR); | |
Wire.write((int)(START_ADDR >> 8)); // MSB | |
Wire.write((int)(START_ADDR & 0xFF)); // LSB | |
Wire.write(0); | |
Wire.write(0); | |
Wire.write(0); | |
Wire.write(1); | |
Wire.endTransmission(); | |
} | |
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