64 lines
1.4 KiB
C++
64 lines
1.4 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
|
|
#ifdef HAS_DISPLAY
|
|
Wire.begin(MY_OLED_SDA, MY_OLED_SCL, 100000);
|
|
#else
|
|
Wire.begin(SDA, SCL, 100000);
|
|
#endif
|
|
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;
|
|
} |