flipperzero-firmware/firmware/targets/f7/furi_hal/furi_hal_i2c_config.h

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#pragma once
#include <furi_hal_i2c_types.h>
#ifdef __cplusplus
extern "C" {
#endif
/** Internal(power) i2c bus, I2C1, under reset when not used */
extern FuriHalI2cBus furi_hal_i2c_bus_power;
/** External i2c bus, I2C3, under reset when not used */
extern FuriHalI2cBus furi_hal_i2c_bus_external;
/** Handle for internal(power) i2c bus
* Bus: furi_hal_i2c_bus_external
* Pins: PA9(SCL) / PA10(SDA), float on release
* Params: 400khz
*/
extern FuriHalI2cBusHandle furi_hal_i2c_handle_power;
/** Handle for external i2c bus
* Bus: furi_hal_i2c_bus_external
* Pins: PC0(SCL) / PC1(SDA), float on release
* Params: 100khz
*/
extern FuriHalI2cBusHandle furi_hal_i2c_handle_external;
#ifdef __cplusplus
}
#endif