Wiki¶

• Table of contents
• Wiki
  • USB <-> I2C
    • SiLabs CP2112
    • Arduino
    • Commande Linux
  • Composants
    • PCF8563 Real-time clock/calendar
    • TCA9555 and TCA9535 I/O Expander 16-Bit
    • ADS1115 Quad ADCs
    • LTC2635 Quad DACs
    • IP5306 Battery Management System
    • 24LC512 EEPROM 512Kbit

USB <-> I2C¶

SiLabs CP2112¶

Passerelle USB-I2C SiLabs CP2112

Arduino¶

#include <Arduino.h>
#include <Wire.h>

void setup(){
    Wire.begin();    
    Serial.begin(9600);
} 

void loop(){
    byte error, address;
    int nDevices;

    Serial.println("Scanning...");

    nDevices = 0;
    for(address = 8; 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.print(address,HEX);
            Serial.println(" !");

            nDevices++;
        }
        else if (error == 4) {
            Serial.print("Unknow error at address 0x");
            if (address < 16)
                Serial.print("0");
            Serial.println(address,HEX);
        } 
    }
    if (nDevices == 0)
        Serial.println("No I2C devices found\n");
    else
        Serial.println("done\n");

    delay(5000);
}

https://arduino-france.site/i2c-scanner/

Commande Linux¶

i2c-tools

sudo apt install i2c-tools

i2cdetect¶

i2cdetect -l

sudo i2cdetect -r -y N

N numero I2C ici 5

détection de puces I2C, TCA9535 0x20, ADS1115 0x48, PCF8563 0x51

i2cget¶

sudo i2cget 5 0x20 0x04

lecture dans le TCA9535 0x20, dans le registre 0x4

i2cset¶

sudo i2cset 5 0x20 0x02 0x01

écriture dans le TCA9535 0x20, dans le registre 0x2, les bits 0b00000001

https://www.acmesystems.it/i2c
https://www.youtube.com/watch?v=QwlqOTDAPfk

Composants¶

PCF8563 Real-time clock/calendar¶

VDD = 1.8 V to 5.5 V
400-kHz Fast I2C bus
@I2C 0x51

PCF8563

TCA9555 and TCA9535 I/O Expander 16-Bit¶

TCA9535 Low-Voltage 16-Bit I2C and SMBus Low-Power I/O Expander with Interrupt Output and Configuration Registers,
TCA9555 is identical to the TCA9535, except for the inclusion of the internal I/O pull-up resistor

VDD 1.65 V to 5 V
400-kHz Fast I2C bus.
@I2C

TCA9535

ADS1115 Quad ADCs¶

16-bit, 860-SPS, 4-channel, delta-sigma ADC with PGA, oscillator, VREF, comparator and I2C

VDD 2.0 V to 5.5 V
@I2C

0x48	0b1001000	GND
0x49	0b1001001	VDD
0x48	0b1001010	SDA
0x49	0b1001011	SCL

ADS1115

LTC2635 Quad DACs¶

Quad 12-/10-/8-Bit I2C VOUT
DACs with 10ppm/°C Reference

VDD 2.7V to 5.5V
@I2C

0x10	0b0010000	GND
0x11	0b0010001	NC
0x12	0b0010010	VDD

LTC2635

IP5306 Battery Management System¶

Fully-Integrated Power Bank System-On-Chip with 2.1A charger, 2.4A discharger

@I2C 0x75
IP5306

24LC512 EEPROM 512Kbit¶

VDD 2.5-5.5V
400-kHz Fast I2C bus
@I2C |||A2|A1|A0| |0x50|0b1010000|GND|GND|GND| |0x51|0b1010001|GND|GND|VCC| |0x52|0b1010010|GND|VCC|GND| |0x53|0b1010000|GND|VCC|VCC| |0x54|0b1010100|VCC|GND|GND| |0x55|0b1010101|VCC|GND|VCC| |0x54|0b1010110|VCC|VCC|GND| |0x55|0b1010111|VCC|VCC|VCC|
24LC512