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