| 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. | 
 |  | 
 | 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. |