# Peripherals

[中文]

## Drivers

In order to control the dependence of other components on drivers at a smaller granularity, the original peripheral drivers under the `driver` component were split into separate components:

- esp_driver_gptimer - Driver for general purpose timers

- esp_driver_pcnt - Driver for pulse counter

- esp_driver_gpio - Driver for GPIO

- esp_driver_spi - Driver for GPSPI

- esp_driver_mcpwm - Driver for Motor Control PWM

- esp_driver_sdmmc - Driver for SDMMC

- esp_driver_sdspi - Driver for SDSPI

- esp_driver_sdio - Driver for SDIO

- esp_driver_ana_cmpr - Driver for Analog Comparator

- esp_driver_i2s - Driver for I2S

- esp_driver_dac - Driver for DAC

- esp_driver_rmt - Driver for RMT

- esp_driver_tsens - Driver for Temperature Sensor

- esp_driver_sdm - Driver for Sigma-Delta Modulator

- esp_driver_i2c - Driver for I2C

- esp_driver_uart - Driver for UART

- esp_driver_ledc - Driver for LEDC

- esp_driver_parlio - Driver for Parallel IO

- esp_driver_usb_serial_jtag - Driver for USB_SERIAL_JTAG

For compatibility, the original `driver` component is still treated as an all-in-one component by registering these esp_driver_xyz components as its public dependencies. In other words, you do not need to modify the CMake file of an existing project, but you now have a way to specify the specific peripheral driver that your project depends on.

Originally, you may have used linker.lf to specify the link location of some driver functions in memory space, but now, because the location of the driver files have been moved, you need to make changes your linker.lf file accordingly. For example, a linker.lf file with the following entries:

    [mapping:my_mapping_scheme]
    archive: libdriver.a
    entries:
        gpio (noflash)

Should be changed to:

    [mapping:my_mapping_scheme]
    archive: libesp_driver_gpio.a
    entries:
        gpio (noflash)

## Secure Element

The ATECC608A secure element interfacing example has been moved to ESP Cryptoauthlib Repository on GitHub.

This example is also part of the esp-cryptoauthlib in the ESP Component Registry.

## I2S

Due to the cumbersome usage of the secondary pointer of DMA buffer, the `data` field in the callback event `i2s_event_data_t` is deprecated, please use the newly added first-level pointer `dma_buf` instead.

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