| |
| This directory is for experiments only. It is not built automatically, |
| required, supported, guaranteed to work, or necessarily well-documented. |
| |
| The contents may change without warning at any time. |
| |
| ------------------------------------------------------------------------------ |
| Lightbar simulator |
| ------------------------------------------------------------------------------ |
| |
| Build with "make lightbar". The executable is "./lightbar". |
| |
| You may need to install libxcb1-dev or similar. |
| |
| This provides a simulation environment for the lightbar task, compiling |
| common/lightbar.c from the EC source, but faking the rest of the EC. |
| |
| The EC console is on stdin/stdout, delivering all input to the lightbar's |
| console command handler (so it prefixes any input with "lightbar"). The |
| lightbar itself is displayed in an X window. You can click in that window to |
| emulate changes to the battery level, AC connection, and brightness, all of |
| which are normally outside the lightbar task's direct control. |
| |
| The initial sequence is "S5". Try issuing the command "seq s3s0" to see |
| something more familiar. |
| |
| |
| Note: the Pixel lightbar circuitry has three modes of operation: |
| |
| Unpowered |
| |
| When the host CPU is off (S5/G3), all power to the lightbar and its |
| controller circuitry is lost. |
| |
| On |
| |
| When the host CPU is on (S0) or suspended (S3), the lightbar is powered |
| again. After every power loss, it will need to be reinitialized by calling |
| lb_init() before it can be used. |
| |
| Standby |
| |
| The lightbar controller ICs can turn off all the LED outputs to conserve |
| power. This is the initial state when power is applied. You can turn the |
| LEDs off manually by calling lb_off(). When suspended, the controller will |
| respond to commands, but the LEDs aren't lit. Turn them on with lb_on(). |
