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hal
Armando 1e1beb69aa spi: fix build fail issue when target is esp32s3 5 anni fa
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esp32 4b95f7efa8 Merge branch 'feature/spi_dma_hal_ll_refactor' into 'master' 5 anni fa
esp32s2 4b95f7efa8 Merge branch 'feature/spi_dma_hal_ll_refactor' into 'master' 5 anni fa
esp32s3 1e1beb69aa spi: fix build fail issue when target is esp32s3 5 anni fa
include 1e1beb69aa spi: fix build fail issue when target is esp32s3 5 anni fa
test 01d9aa8070 soc: move mpu_hal test to hal component 5 anni fa
CMakeLists.txt 7f5893d53c soc: move dac_hal to hal 5 anni fa
README.md 5baf124219 docs: update readme aftering extracting hal document from soc document 5 anni fa
adc_hal.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
component.mk 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
cpu_hal.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
dac_hal.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
gpio_hal.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
i2c_hal.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
i2c_hal_iram.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
i2s_hal.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
ledc_hal.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
ledc_hal_iram.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
linker.lf 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
mcpwm_hal.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
mpu_hal.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
pcnt_hal.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
rmt_hal.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
rtc_io_hal.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
sdio_slave_hal.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
sigmadelta_hal.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
soc_hal.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
spi_flash_hal.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
spi_flash_hal_common.inc 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
spi_flash_hal_gpspi.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
spi_flash_hal_iram.c d7e50c6457 spi_flash:bringup some flash supports for esp32s3 5 anni fa
spi_hal.c 1e1beb69aa spi: fix build fail issue when target is esp32s3 5 anni fa
spi_hal_iram.c 1e1beb69aa spi: fix build fail issue when target is esp32s3 5 anni fa
spi_slave_hal.c 1e1beb69aa spi: fix build fail issue when target is esp32s3 5 anni fa
spi_slave_hal_iram.c 1e1beb69aa spi: fix build fail issue when target is esp32s3 5 anni fa
spi_slave_hd_hal.c 1e1beb69aa spi: fix build fail issue when target is esp32s3 5 anni fa
timer_hal.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
touch_sensor_hal.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
twai_hal.c 7398390049 TWAI: Track HW state in HAL 5 anni fa
uart_hal.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
uart_hal_iram.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa
wdt_hal_iram.c 5425ef4ee4 hal: extract hal component from soc component 5 anni fa

README.md

hal

The hal component provides hardware abstraction and implementation for targets supported by ESP-IDF.

include/hal

/include/hal contains header files which provides a hardware-agnostic interface to the SoC. The interface consists of function declarations and abstracted types that other, higher level components can make use of in order to have code portable to all targets ESP-IDF supports.

It contains an abstraction layer for ineracting with/driving the hardware found in the SoC such as the peripherals and 'core' hardware such as the CPU, MPU, caches, etc. It contains for the abstracted types. The abstraction design is actually two levels -- often somtimes xxx_hal.h includes a lower-level header from a xxx_ll.h, which resides in the implementation. More on this abstraction design in the hal/include/hal's Readme

target/include

Provides the implementation of the hardware-agnostic interface in the abstraction. Target-specific subdirectories exist for wildly different implementations among targets; while code that are common/very similar might be placed in the top-level of /<target>/include, using some amount of conditional preprocessors. It is up to the developers' discretion on which strategy to use. Code usually reside in source files with same names to header files whose interfaces they implement, ex. xxx_hal.c for xxx_hal.h.

As mentioned previously, the lower-level abstraction header xxx_ll.h resides in this directory, since they contain hardware-specific details. However, what these can do is provide some abstraction among implementations, so that more code can be moved to the common, non-target-specific subdirectories.

This can also contain target-specific extensions to the HAL headers. These target-specific HAL headers have the same name and include the abstraction layer HAL header via include_next. These extensions might add more function declarations or override some things using macro magic.