esp-idf/components/hal
Jiang Jiang Jian 4cc2340265 Merge branch 'bugfix/fix_onebyte_watchpoint_setting_v4.4' into 'release/v4.4'
fix(riscv): supports 1 byte and larger than 64byte range watchpoint setting (v4.4)

See merge request espressif/esp-idf!27517
2023-12-04 11:59:49 +08:00
..
esp32 change(hal): remove useless code from periph_ll_wifi_bt_module_enable_clk 2023-11-10 14:05:09 +08:00
esp32c3 fix(riscv): supports 1 byte and larger than 64byte range watchpoint setting 2023-11-30 15:47:22 +08:00
esp32h2 fix(riscv): supports 1 byte and larger than 64byte range watchpoint setting 2023-11-30 15:47:22 +08:00
esp32s2 fix(esp_hw_support): fix lightsleep current leakage on usb-phy controlled pad 2023-11-20 11:25:28 +08:00
esp32s3 Merge branch 'bugfix/fix_psram_access_faild_after_pd_cpu_wakeup_v4.4' into 'release/v4.4' 2023-11-21 10:57:03 +08:00
include/hal esp_eth: receive buffer allocation optimization 2023-11-20 12:32:03 +01:00
platform_port/include/hal
test
CMakeLists.txt
Kconfig
README.md
adc_hal.c DMA EOF may happens per multiple dma descriptors, instead of only one. 2023-09-05 11:18:56 +08:00
aes_hal.c
component.mk
cpu_hal.c
dac_hal.c
ds_hal.c
efuse_hal.c
emac_hal.c esp_eth: receive buffer allocation optimization 2023-11-20 12:32:03 +01:00
gdma_hal.c
gpio_hal.c
i2c_hal.c
i2c_hal_iram.c
i2s_hal.c
interrupt_controller_hal.c
lcd_hal.c
ledc_hal.c
ledc_hal_iram.c
linker.lf
mcpwm_hal.c
mpu_hal.c
pcnt_hal.c
rmt_hal.c
rtc_io_hal.c
sdio_slave_hal.c
sha_hal.c
sigmadelta_hal.c
soc_hal.c
spi_flash_encrypt_hal_iram.c
spi_flash_hal.c
spi_flash_hal_common.inc
spi_flash_hal_gpspi.c
spi_flash_hal_iram.c
spi_hal.c fix(spi): fixed undesired touching to DMA 2023-11-08 10:12:03 +00:00
spi_hal_iram.c
spi_slave_hal.c fix(spi): fixed undesired touching to DMA 2023-11-08 10:12:03 +00:00
spi_slave_hal_iram.c
spi_slave_hd_hal.c fix(spi): fixed undesired touching to DMA 2023-11-08 10:12:03 +00:00
systimer_hal.c
timer_hal.c
touch_sensor_hal.c
twai_hal.c
twai_hal_iram.c
uart_hal.c
uart_hal_iram.c
usb_dwc_hal.c
usb_hal.c
usb_phy_hal.c fix(esp_hw_support): fix lightsleep current leakage on usb-phy controlled pad 2023-11-20 11:25:28 +08:00
wdt_hal_iram.c
xt_wdt_hal.c

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.