CRTP byte transport for Sensirion SF06-family flow meters (SFM4300, …). More...

#include <cstddef>
#include <cstdint>
#include <type_traits>

Include dependency graph for sfm_i2c_interface.hpp:

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Classes
class	sfm::I2cInterface< Derived >
	CRTP base for the SF06 I2C transport. More...

Namespaces
namespace	sfm

Detailed Description

CRTP byte transport for Sensirion SF06-family flow meters (SFM4300, …).

The driver only moves bytes. Sensirion SF06 devices do not use a register-address model: a transaction is either a raw write of a 16-bit command (plus optional 16-bit argument + CRC) or a raw read of N words, each followed by a CRC-8 byte. The platform adapter therefore implements:

bool Write(uint8_t addr7, const uint8_t* data, std::size_t len);
bool Read(uint8_t addr7, uint8_t* out, std::size_t len);
void DelayMs(uint32_t ms);
bool EnsureInitialized();

Optional (default returns false = not supported):

bool WriteGeneralCall(uint8_t byte); — write one byte to the I2C general-call address 0x00 (used by Driver::SoftReset).

Reads return false on NACK. The SF06 sensors NACK a read header while no fresh measurement is available (data sheet §4.3.1); the driver reports that as DriverError::NoData.

Classes

Namespaces

Detailed Description