The clock adjustment API only used a 16 bit integer for speed correction. This
is to course grained to allow compensating clock drifts at high accuracy.
Using a 32 bit integer instead would allow to fix for a drift of up to
about 1 nanosecond drift per each 5 seconds.
That ought to be enough for anyone! (*cough* *cough*)
The driver uses the netdev interface. Due to the limited
capabilities of the transceiver (32 byte FIFO and no source address in the layer2 frame),
it relies on 6LowPAN compression and adds the source address to the frame for that.
Changed the API of `netdev_driver_t`:
- The `send()` function should no longer return the number of bytes and should
not block
- The upper layer now must call the new `confirm_send()` function after
calling `send()`; either busy waiting until something different to `-EBUSY`
is returned, or after `NETDEV_EVENT_TX_COMPLETE` was signaled
During transition to the new API, the upper layer must remain backward
compatible and must assume the legacy API if `netdev_driver_t::confirm_send()`
is `NULL`.
The SI1133 from Silicon Labs is a UV Index Sensor and Ambient Light
Sensor in a small 2x2 mm DFN package. The sensor can measure
independently ultra violet (UV) light, infra red (IR) light and
ambient light, however the ambient light is also influenced by the
IR light requiring compensation from the IR readings.
The SI1133 is quite different from other Silicon Labs chips in RIOT OS
and therefore needs its own driver. In particular, the SI1133 has 7
different photodiode configurations to read but only 6 channels to
read them in parallel so only some channels can be read each time.
This patch implements a new driver allowing to read the data directly
and a saul interface for the three kinds of light source. There are
many configuration options including interrupts and continous modes
that are left out of this initial driver.
This adds an API function to play a buffer of Audio samples using a DAC.
Double buffered operation is supported by specifying a callback that will
be called when the next buffer can be queued with dac_dds_play().
To calibrate the at86rf215 radio, trim value has to be set at run-time
during board production.
Add two helper functions to control the trim value and clock output register.
