[HeRos] Faster camera configuration

This morning, I asked myself why I needed 10 seconds to configure the camera. After looking with the logic analyzer, I saw that the SCCB communication used a 250 Hz frequency.

Flo explained to me that chThdWaitMicroseconds doesn’t work in ChibiOS. Thus, the minimum wait time is 1 ms. Charles had the same problem yesterday. In order to wait a smaller time, he used GPT.

I changed the driver to wait a smaller time with GPT. Now, the time to configure the camera is reasonable.

Here the file : https://gist.github.com/Morikko/523c4e8a5bc85ceef224

 

Eric Masseran

LinkedIn 

1 comment to [HeRos] Faster camera configuration

  • Samuel Tardieu

    chThdSleepMicroseconds works just fine in ChibiOS. The problem is with your system frequency, configurable in chconf.h.