ninh 659d805411 esp_wifi: light sleep optimization 5 년 전
..
esp32 659d805411 esp_wifi: light sleep optimization 5 년 전
esp32c3 659d805411 esp_wifi: light sleep optimization 5 년 전
esp32s2 659d805411 esp_wifi: light sleep optimization 5 년 전
esp32s3 659d805411 esp_wifi: light sleep optimization 5 년 전
include 27aa6c289f components/pm: Add slp gpio configure workaround 5 년 전
test 27a9cf861e driver: Add esp32c3 drivers (except ADC/DAC) and update tests 5 년 전
CMakeLists.txt 27aa6c289f components/pm: Add slp gpio configure workaround 5 년 전
README.md 5baf124219 docs: update readme aftering extracting hal document from soc document 5 년 전
adc_hal.c e6d23a35ec gdma: dynamic alloc DMA channels 5 년 전
aes_hal.c e6d23a35ec gdma: dynamic alloc DMA channels 5 년 전
component.mk e6d23a35ec gdma: dynamic alloc DMA channels 5 년 전
cpu_hal.c 66fb5a29bb Whitespace: Automated whitespace fixes (large commit) 5 년 전
dac_hal.c 5425ef4ee4 hal: extract hal component from soc component 5 년 전
ds_hal.c e532a29288 [Peripheral/Security] DS peripheral driver 5 년 전
gdma_hal.c e6d23a35ec gdma: dynamic alloc DMA channels 5 년 전
gpio_hal.c 66fb5a29bb Whitespace: Automated whitespace fixes (large commit) 5 년 전
i2c_hal.c 753a929525 global: fix sign-compare warnings 5 년 전
i2c_hal_iram.c 5425ef4ee4 hal: extract hal component from soc component 5 년 전
i2s_hal.c 58c3f6a421 hal: explicitly include soc_caps.h 5 년 전
interrupt_controller_hal.c caf1e9d570 Merge branch 'bugfix/soc_caps_implicit_inc' into 'master' 5 년 전
ledc_hal.c 58c3f6a421 hal: explicitly include soc_caps.h 5 년 전
ledc_hal_iram.c 5425ef4ee4 hal: extract hal component from soc component 5 년 전
linker.lf 4c57f50fe4 TWAI: ISR runs when cache is disabled 5 년 전
mcpwm_hal.c 58c3f6a421 hal: explicitly include soc_caps.h 5 년 전
mpu_hal.c 66fb5a29bb Whitespace: Automated whitespace fixes (large commit) 5 년 전
pcnt_hal.c 5425ef4ee4 hal: extract hal component from soc component 5 년 전
rmt_hal.c 58c3f6a421 hal: explicitly include soc_caps.h 5 년 전
rtc_io_hal.c 58c3f6a421 hal: explicitly include soc_caps.h 5 년 전
sdio_slave_hal.c 753a929525 global: fix sign-compare warnings 5 년 전
sha_hal.c 2d3f22918f Merge branch 'feature/gdma_channel_allocator' into 'master' 5 년 전
sigmadelta_hal.c 66fb5a29bb Whitespace: Automated whitespace fixes (large commit) 5 년 전
soc_hal.c 66fb5a29bb Whitespace: Automated whitespace fixes (large commit) 5 년 전
spi_flash_hal.c 7c08be5771 hal: Add initial ESP32-C3 support 5 년 전
spi_flash_hal_common.inc d4c9a45675 spi_flash: Add ESP32-C3 support 5 년 전
spi_flash_hal_gpspi.c 66fb5a29bb Whitespace: Automated whitespace fixes (large commit) 5 년 전
spi_flash_hal_iram.c d4c9a45675 spi_flash: Add ESP32-C3 support 5 년 전
spi_hal.c 7c08be5771 hal: Add initial ESP32-C3 support 5 년 전
spi_hal_iram.c 7c08be5771 hal: Add initial ESP32-C3 support 5 년 전
spi_slave_hal.c f7e91ef6c1 spi: esp32s3 bringup for spi 5 년 전
spi_slave_hal_iram.c 7c08be5771 hal: Add initial ESP32-C3 support 5 년 전
spi_slave_hd_hal.c 7c08be5771 hal: Add initial ESP32-C3 support 5 년 전
timer_hal.c 66fb5a29bb Whitespace: Automated whitespace fixes (large commit) 5 년 전
touch_sensor_hal.c 58c3f6a421 hal: explicitly include soc_caps.h 5 년 전
twai_hal.c 58c3f6a421 hal: explicitly include soc_caps.h 5 년 전
twai_hal_iram.c 66fb5a29bb Whitespace: Automated whitespace fixes (large commit) 5 년 전
uart_hal.c 05a4a8d864 uart: seperate sclk and baudrate setting 5 년 전
uart_hal_iram.c 753a929525 global: fix sign-compare warnings 5 년 전
wdt_hal_iram.c 7c08be5771 hal: Add initial ESP32-C3 support 5 년 전

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.