Commit Graph

11 Commits

Author SHA1 Message Date
curuvar
0c3db448bb Added Adafruit Feather RP2040, Adafruit KB2040 and Added neopixel driver to support RP2040 2022-06-30 22:13:49 -07:00
Petro Karashchenko
09b3fb25ab drivers: remove unimplemented open/close/ioctl interfaces
Signed-off-by: Petro Karashchenko <petro.karashchenko@gmail.com>
2022-04-15 16:56:25 +08:00
Petro Karashchenko
a743fed63d file_operations: get back C89 compatible initializer
Signed-off-by: Petro Karashchenko <petro.karashchenko@gmail.com>
2022-01-11 02:14:00 +08:00
Gustavo Henrique Nihei
330eff36d7 sourcefiles: Fix relative path in file header 2021-03-09 23:18:28 +08:00
Xiang Xiao
0defe43282 OS internal function should indicate the error by return negative value
instead to change errno value by calling set_errno

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
2020-12-31 09:37:29 +01:00
Diego Herranz
d9d649105d drivers/leds/ws2812: optimize reset bytes
It's not necessary to send a reset pulse after sending the RGB data
since the first thing that a new transmission does is sending the long
reset pulse. I have left 1 reset byte after the RGB data to keep some
padding given that the bits inside the byte are shifted by 1 bit although
I think it wouldn't be necessary either. But just in case.

This reduces the memory usage (you can easily save 60 bytes) and increases
the maximum refresh rate.
2020-12-10 20:39:08 -06:00
Diego Herranz
3edb3a47b2 drivers/leds/ws2812: fix code style
As reported by the CI checks.
2020-12-07 21:15:35 -08:00
Diego Herranz
441180b08c drivers/leds/ws2812: make frequency selection more flexible
Previously only 4 MHz and 8 MHz were allowed. Given the tolerance
allowed in the WS2812 timing spec, frequency ranges around those
two can be used too which is useful for boards in which it is
difficult to generate those specific frequencies.
2020-12-07 21:15:35 -08:00
Diego Herranz
117947b5a1 drivers/led/ws2812: fix comments
Complete or improve some explanations and fix some typos
2020-12-02 21:22:12 -08:00
Brennan Ashton
f41b9a10b3 ws2812: moved SPI_LOCK and forgot to change spi drv var name
This snuck in durring a slight PR fixup.
2020-09-28 08:25:43 +01:00
Brennan Ashton
e2fd1fdd84 LED: Support for WS2812 led controller (aka Adafruit NeoPixel)
The WS2812 is very common in LED strips as it is an integrated
controller and LED. It is driven by a single data line, but
the timing requirements can be met by using most SPI controllers
and the use of DMA.

This driver has been validated on the nRF52 arch both with a
single LED and a strip of 144.

Signed-off-by: Brennan Ashton <bashton@brennanashton.com>
2020-09-16 10:35:56 -07:00