ESP32-PaxCounter/src/i2cscan.cpp
2019-09-09 11:18:37 +02:00

59 lines
1.3 KiB
C++

// Basic config
#include "globals.h"
#include "i2cscan.h"
// Local logging tag
static const char TAG[] = __FILE__;
int i2c_scan(void) {
int i2c_ret, addr;
int devices = 0;
ESP_LOGI(TAG, "Starting I2C bus scan...");
for (addr = 8; addr <= 119; addr++) {
// scan i2c bus with no more to 100KHz
Wire.beginTransmission(addr);
Wire.write(addr);
i2c_ret = Wire.endTransmission();
if (i2c_ret == 0) {
devices++;
switch (addr) {
case SSD1306_PRIMARY_ADDRESS:
case SSD1306_SECONDARY_ADDRESS:
ESP_LOGI(TAG, "0x%X: SSD1306 Display controller", addr);
break;
case BME_PRIMARY_ADDRESS:
case BME_SECONDARY_ADDRESS:
ESP_LOGI(TAG, "0x%X: Bosch BME MEMS", addr);
break;
case AXP192_PRIMARY_ADDRESS:
ESP_LOGI(TAG, "0x%X: AXP192 power management", addr);
break;
case QUECTEL_GPS_PRIMARY_ADDRESS:
ESP_LOGI(TAG, "0x%X: Quectel GPS", addr);
break;
case MCP_24AA02E64_PRIMARY_ADDRESS:
ESP_LOGI(TAG, "0x%X: 24AA02E64 serial EEPROM", addr);
break;
default:
ESP_LOGI(TAG, "0x%X: Unknown device", addr);
break;
}
} // switch
} // for loop
ESP_LOGI(TAG, "I2C scan done, %u devices found.", devices);
return devices;
}