DESCRIPTION
The
tm121temp driver provides support for the Texas Instruments (formerly Burr-Brown) TMP121 temperature sensor with the
envsys(4) API. These devices are connected to the host system with
spi(4) or Microwire 4-wire serial busses. The
tm121temp is capable of measuring temperatures with a 2 degree accuracy over the frame from -40 to 125 Celsius. Temperatures are reported with a granularity of 625 microKelvins.
tm121temp devices can transfer information at up to 10MHz, and support SPI mode 0.
The device reports itself with envsys(4) using the generic device name. This name can be overridden, by specifying an alternate name in the device property “envsys-description”.