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Update src/i2c/esp32c3_master_i2c/esp32c3_master_i2c.ino

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Ghassan Yusuf 2025-06-21 14:25:09 +03:00
parent a37ff59dc5
commit 9a7677a857
1 changed files with 48 additions and 33 deletions
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79
src/i2c/esp32c3_master_i2c/esp32c3_master_i2c.ino
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@ -9,7 +9,15 @@
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET); Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
// NEW Datatype For State
enum _state { NOT_READY, READY, SENDING };
// Variables
_state state = NOT_READY;
void setup() { void setup() {
// Serial
Serial.begin(115200); Serial.begin(115200);
// Initialize I2C bus (ESP32-C3 default pins) // Initialize I2C bus (ESP32-C3 default pins)
@ -17,46 +25,53 @@ void setup() {
// Scan I2C devices // Scan I2C devices
Serial.println("Scanning I2C devices..."); Serial.println("Scanning I2C devices...");
// scanI2C();
// Scan I2C
scanI2C();
// Initialize OLED // Initialize OLED
if(!display.begin(SSD1306_SWITCHCAPVCC, OLED_ADDR)) { if(!display.begin(SSD1306_SWITCHCAPVCC, OLED_ADDR)) {
Serial.println("SSD1306 allocation failed"); Serial.println("SSD1306 allocation failed");
while(1); while(1);
} }
display.clearDisplay();
display.setTextSize(1);
display.setTextColor(SSD1306_WHITE);
display.setCursor(0,0);
display.println("Hello, ESP32-C3!");
display.display();
}
void scanI2C() { // Print On Display
byte error, address; oled_write("Hello, ESP32-C3!");
int nDevices = 0;
for(address = 1; address < 127; address++ ) {
Wire.beginTransmission(address);
error = Wire.endTransmission();
if (error == 0) {
Serial.print("I2C device found at address 0x");
if (address<16) Serial.print("0");
Serial.println(address, HEX);
nDevices++;
} else if (error==4) {
Serial.print("Unknown error at address 0x");
if (address<16) Serial.print("0");
Serial.println(address, HEX);
}
}
if (nDevices == 0)
Serial.println("No I2C devices found");
else
Serial.println("Scan complete");
} }
void loop() { void loop() {
// Nothing to do here for this simple example
scanI2C(); // Send Tex Message To Slave
delay(1000); i2c_send_string(0x55, Question("String Message"));
// Request Data
Wire.requestFrom(0x55, 1);
// Read Data Available
if(Wire.available()) {
if(char(Wire.read()) == 'N') {
Serial.println("Requested Data : Not Ready");
state = NOT_READY;
} else {
Serial.println("Requested Data : Ready");
state = READY;
}
}
// Request Data
Wire.requestFrom(0x55, 6);
// Prepare 6 Bytes Of Data
uint8_t data[6];
// Read Data Available
if(Wire.available()) {
for(int i=0; i<6; i++) {
data[i] = Wire.read();
Serial.print(char(data[i]));
}
Serial.println();
}
} }