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pamoja_ds18b20_discover

pamoja_ffi::sensors_driver

Function pamoja_ds18b20_discover 

Source 
#[unsafe(no_mangle)]
pub unsafe extern "C" fn pamoja_ds18b20_discover(
    devices: *const c_char,
    out_thermometers: *mut *mut PamojaDs18b20Thermometers,
) -> PamojaStatus
Expand description

Lists every DS18B20 the kernel has found: one per 28- directory.

§Arguments

  • devices - the directory the kernel lists its 1-Wire devices in, or null for /sys/bus/w1/devices.
  • out_thermometers - receives the list, sorted by directory name.

§Returns

PamojaStatus::Ok; PamojaStatus::InvalidArgument for a null out_thermometers or a non-UTF-8 directory; or PamojaStatus::Io when the directory cannot be listed, which usually means the 1-Wire overlay is off.

§Safety

devices must be a null-terminated string or null, and out_thermometers a writable pointer or null.