| Tomas Pop | 1a539d3 | 2014-06-05 15:24:19 -0700 | [diff] [blame] | 1 | Kernel driver shtc1 |
| 2 | =================== |
| 3 | |
| 4 | Supported chips: |
| 5 | * Sensirion SHTC1 |
| 6 | Prefix: 'shtc1' |
| 7 | Addresses scanned: none |
| 8 | Datasheet: http://www.sensirion.com/file/datasheet_shtc1 |
| 9 | |
| 10 | * Sensirion SHTW1 |
| 11 | Prefix: 'shtw1' |
| 12 | Addresses scanned: none |
| 13 | Datasheet: Not publicly available |
| 14 | |
| 15 | Author: |
| 16 | Johannes Winkelmann <johannes.winkelmann@sensirion.com> |
| 17 | |
| 18 | Description |
| 19 | ----------- |
| 20 | |
| 21 | This driver implements support for the Sensirion SHTC1 chip, a humidity and |
| 22 | temperature sensor. Temperature is measured in degrees celsius, relative |
| 23 | humidity is expressed as a percentage. Driver can be used as well for SHTW1 |
| 24 | chip, which has the same electrical interface. |
| 25 | |
| 26 | The device communicates with the I2C protocol. All sensors are set to I2C |
| 27 | address 0x70. See Documentation/i2c/instantiating-devices for methods to |
| 28 | instantiate the device. |
| 29 | |
| 30 | There are two options configurable by means of shtc1_platform_data: |
| 31 | 1. blocking (pull the I2C clock line down while performing the measurement) or |
| 32 | non-blocking mode. Blocking mode will guarantee the fastest result but |
| 33 | the I2C bus will be busy during that time. By default, non-blocking mode |
| 34 | is used. Make sure clock-stretching works properly on your device if you |
| 35 | want to use blocking mode. |
| 36 | 2. high or low accuracy. High accuracy is used by default and using it is |
| 37 | strongly recommended. |
| 38 | |
| 39 | sysfs-Interface |
| 40 | --------------- |
| 41 | |
| 42 | temp1_input - temperature input |
| 43 | humidity1_input - humidity input |