The BME280 is close to compatible with the existing BMP280 and extends it with support for measuring humidity, so support has been bundled into the bmp280 driver.
The example now auto-detects the device and displays the humidity for the BME280.
The I2C bus initialization has been moved out of the bmp280 driver to support multiple devices.
The check-id and reset logic has been bundled into the driver initialization. It needs to be re-initialized after reset anyway and the chip-id is need to initialize it, just re-initialize to reset.
Support has been added for multiple devices. The calibration data storage needs to be managed by the caller rather than static data. The caller can choose the I2C address to allow two BMx280 devices to be used on the same I2C bus.
An interface has been added to return the measurement values in an integer fixed float format. The float format interface is still there.
All the values are read in one I2C transaction to ensure they are a consistent set.
Renamed bmp280_calib_t to bmp280_t, and removed read_register8.
An application using multiple I2C devices will need it's own
loop. This reworks the code to make the detection, calibration
constant loading, and measurment functions available too without
having to use the bmp810 task which is still retained.
Adds support for oversampling.
Fixes a bug in the calculation of the temperature.
Better error handling. Checks for I2C errors and errors in the loading
of the calibration constants and propagates these up.
Fixes#147
* Can vary tick rate from 100Hz via configTICK_RATE_HZ. Note that the
SDK binary libraries are hard-coded to assume the tick rate is 100Hz,
so changing the tick rate may have unexpected consequences for lower
layer WiFi behaviour (such as certain kinds of timeouts happening
faster/slower.)
* Setting configCPU_CLOCK_HZ to 160MHz means ESP will set 160MHz during
initialisation. Only 80MHz and 160MHz are supported.
* Timing of tasks is no longer affected by current CPU freq (whether set
via configCPU_CLOCK_HZ or via sdk_system_update_cpu_freq().)
Previously doubling the CPU frequency would double the tick rate.
This commits adds JSON support by adding Jsmn
(http://zserge.com/jsmn.html), a minimalistic JSON parser.
Signed-off-by: Drasko DRASKOVIC <drasko.draskovic@gmail.com>
Also reduces the IRAM footprint of the fatal exception handler, as only
the prelude (which disables interrupts & enables the flash mapping) is
in IRAM now.
Closes#54, relevant to #133.
Use onewire_addr_t for onewire addresses
Move internal defines out of onewire.h
Remove global variables for search state
use taskENTER_CRITICAL instead of portDISABLE_INTERRUPTS
remove unnecessary onewire_init function
Remove unnecessary critical sections
Use GPIO_OUT_OPEN_DRAIN
reformat/style cleanup
