Wiki » History » Revision 39
Revision 38 (Frédéric Blanc, 2024-11-08 14:09) → Revision 39/40 (Frédéric Blanc, 2024-12-09 15:24)
h1. Wiki
{{toc}}
h2. USB <-> I2C
h3. SiLabs CP2112
!clipboard-202411051457-ujwet.png!
Passerelle USB-I2C SiLabs CP2112
h3. Arduino
<pre><code class="cpp">
#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);
}
</code></pre>
https://arduino-france.site/i2c-scanner/
h3. Commande Linux
h4. i2c-tools
<pre><code class="shell">
sudo apt install i2c-tools
</code></pre>
h5. i2cdetect
<pre><code class="shell">
i2cdetect -l
</code></pre>
!clipboard-202411051520-zo9bt.png!
<pre><code class="shell">
sudo i2cdetect -r -y N
</code></pre>
N numero I2C ici 5
!clipboard-202411081354-28b9g.png!
détection de puces I2C, TCA9535 0x20, ADS1115 0x48, PCF8563 0x51
h5. i2cget
<pre><code class="shell">
sudo i2cget 5 0x20 0x04
</code></pre>
!clipboard-202411081405-bcbfj.png!
lecture dans le TCA9535 0x20, dans le registre 0x4
h5. i2cset
<pre><code class="shell">
sudo i2cset 5 0x20 0x02 0x01
</code></pre>
!clipboard-202411081403-zlizw.png!
écriture dans le TCA9535 0x20, dans le registre 0x2, les bits 0b00000001
https://www.acmesystems.it/i2c
https://www.youtube.com/watch?v=QwlqOTDAPfk
h2. Composants
h3. PCF8563 Real-time clock/calendar
!clipboard-202411071057-aw2q3.png!
VDD = 1.8 V to 5.5 V
400-kHz Fast I2C bus
*@I2C 0x51*
document#245
h3. TCA9535 I/O Expander 16-Bit
Low-Voltage 16-Bit I2C and SMBus Low-Power I/O Expander with Interrupt Output and Configuration Registers,
!clipboard-202411071059-exmd3.png!
VDD 1.65 V to 5 V
400-kHz Fast I2C bus.
*@I2C*
!clipboard-202411071120-iho0j.png!
document#243
h3. ADS1115 Quad ADCs
16-bit, 860-SPS, 4-channel, delta-sigma ADC with PGA, oscillator, VREF, comparator and I2C
!clipboard-202411071414-qcbtd.png!
VDD 2.0 V to 5.5 V
*@I2C*
|0x48|0b1001000|GND|
|0x49|0b1001001|VDD|
|0x48|0b1001010|SDA|
|0x49|0b1001011|SCL|
document#242
h3. LTC2635 Quad DACs
Quad 12-/10-/8-Bit I2C VOUT
DACs with 10ppm/°C Reference
!clipboard-202411081042-w1dol.png!
VDD 2.7V to 5.5V
*@I2C*
|0x10|0b0010000|GND|
|0x11|0b0010001|NC|
|0x12|0b0010010|VDD|
document#244
h3. IP5306 Battery Management System
Fully-Integrated Power Bank System-On-Chip with 2.1A charger, 2.4A discharger
!clipboard-202411081112-fltgj.png!
*@I2C 0x75*
document#246
h3. 24LC512 EEPROM 512Kbit
!clipboard-202411081325-eulk2.png!
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|
document#247