zephyr/ext/hal
Loic Poulain d9be3f21f4 ext: hal: nxp: mcux: csi: Fix double buffering capture
In case of double buffering (two capture buffers), the CSI is
frequently starved because of a lack of buffer in the active pool.

You can find below an example of double buffering scenario:

                FREE_BUF  ACTIVE_BUF
start:              0          2
frame0_complete:    0          1  (no buffer to load in active)
resubmit_frame0:    1          1
frame1_complete:    1          0  (CSI stopped, active buf = 0)
resubmit_frame1:    2          0
                    0    ->    2  (CSI restarted)

This patch solves this issue by loading buffer to active at submit
time.

                FREE_BUF  ACTIVE_BUF
start:              0          2
frame0_complete:    0          1
resubmit_frame0:    1          1
                    0    ->    2  (Direct load to active)
frame1_complete:    0          1
resubmit_frame1:    1          1
                    0    ->    2
...

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
2019-03-26 07:44:55 -05:00
..
altera kconfig: altera: remove undefined kconfig usage 2019-01-30 13:30:17 -05:00
atmel ext: hal: atmel: sam: really fix GMAC priority queues related registers 2019-02-14 22:17:53 -05:00
cmsis
cypress kconfig: Remove blank lines at the beginning/end of files 2019-03-13 07:29:42 -05:00
esp
libmetal ext: libmetal: Update libmetal to snapshot for bug fixes 2019-03-11 14:37:57 -05:00
microchip kconfig: Remove redundant 'default n' properties 2019-02-27 09:25:22 +01:00
nordic ext: nordic: Unify NRFX_RTC* options handling in nrfx_config*.h 2019-03-06 11:37:51 -06:00
nxp ext: hal: nxp: mcux: csi: Fix double buffering capture 2019-03-26 07:44:55 -05:00
openisa
qmsi kconfig: Remove blank lines at the beginning/end of files 2019-03-13 07:29:42 -05:00
silabs ext: silabs: rename ramfunc section to match Zephyr's 2019-02-23 07:31:12 -05:00
st kconfig: Remove blank lines at the beginning/end of files 2019-03-13 07:29:42 -05:00
ti ext: simplelink: add workarounds when using POSIX headers 2019-03-20 11:36:18 -05:00
CMakeLists.txt ext : hal : mec1701 Add the MEC1701 external header. 2019-02-08 21:38:54 -05:00
Kconfig ext : hal : mec1701 Add the MEC1701 external header. 2019-02-08 21:38:54 -05:00
README

README

This directory contains different HALs for SoCs supported by Zephyr.

The following HALs are supported:

atmel
-------
The Atmel Software Framework (ASF) provides device header files and peripheral
drivers for Atmel SoCs.

cmsis
-------
The ARM Cortex Microcontroller Software Interface Standard (CMSIS) defines a
set of standard interfaces to ARM Cortex-M SoCs.

libmetal
--------
libmetal provides a HAL abstraction layer utilized by open-amp

gecko
-----
The Silicon Labs Gecko SDK provides device header files and peripheral drivers
for all Silicon Labs Gecko devices: EFM32, EZR32 and EFR32.

mcux
-------
The NXP MCUXpresso Software Development Kit (MCUX) provides device header files
and peripheral drivers for Kinetis, LPC, and i.MX SoCs.

nordic
-------
The Nordic Semiconductor Microcontroller Development Kit (MDK) provides device
header files for the Nordic Semiconductor nRF5 SoCs.

openisa
-------
This directory contains HALs used to enable OpenISA's RISC-V development
boards.

pdl
---
The Cypress Peripheral Driver Library (PDL) provides device header files and
peripheral drivers for PSoC6 SoCs.

qmsi
-------
Intel® Quark™ Microcontroller Software Interface (QMSI) is a Hardware
Abstraction Layer (HAL) for Intel® Quark™ Microcontroller products. It
currently support the following SoCs:

- Intel® Quark™ D2000 Microcontroller
- Intel® Quark™ SE Microcontroller

stm32cube
---------
ST Microelectronics STM32Cube SDK
Provides CMSIS header files and two different porting layers HAL (hardware
abstraction layer), and LL (low layers) enabling portability between different
STM32 devices via standardized API calls.
LL and HAL provide different level of porting on STM32 SoCs. They could be used
independently, or mixed depending on the needs.

For further information:
http://www.st.com/en/ecosystems/stm32cube.html

ti
-------
Texas Instruments SimpleLink SDKs provide peripheral and WiFi driver libraries
for the SimpleLink family of SoCs.