boards/esp32-wroom-32/include/periph_conf.h

Peripheral MCU configuration for generic ESP32-WROOM-32 boards.

This configuration can be used for a large set of ESP32 boards that use an ESP32-WROOM-32 module and simply break out all GPIOs to external pads without having any special hardware or interfaces on-board. Examples are Espressif’s EPS32-DEVKIT or NodeMCU-ESP32S and a large number of clones.

For detailed information about the configuration of ESP32 boards, see section .

Note

Most definitions can be overridden by an .

ADC_GPIOS

Declaration of GPIOs that can be used as ADC channels. 

1
2
3
{ GPIO0 , GPIO2 , GPIO4 , GPIO12, GPIO13, GPIO14, \
                      GPIO15, GPIO25, GPIO26, GPIO27, GPIO32, GPIO33, \
                      GPIO34, GPIO35, GPIO36, GPIO39 }

For generic boards, all ADC pins that have broken out are declared as ADC channels.

Note

As long as the GPIOs listed in ADC_GPIOS are not initialized as ADC channels with the adc_init function, they can be used for other purposes.

DAC_GPIOS

Declaration of GPIOs that can be used as DAC channels. 

1
{ GPIO25, GPIO26 }

For generic boards the 2 DAC lines GPIO25 and GPIO26 are declared as DAC channels.

Note

As long as the GPIOs listed in DAC_GPIOS are not initialized as DAC channels with the dac_init function, they can be used for other purposes.

I2C0_SPEED

I2C bus speed of i2c.h::I2C_DEV 

1
I2C_SPEED_FAST
I2C0_SCL

SCL signal of i2c.h::I2C_DEV [UEXT1]. 

1
GPIO22
I2C0_SDA

SDA signal of i2c.h::I2C_DEV [UEXT1]. 

1
GPIO21
PWM0_GPIOS

Declaration of the channels for device pwm.h::PWM_DEV, at maximum six channels. 

1
{ GPIO0, GPIO2, GPIO4, GPIO16, GPIO17 }
PWM1_GPIOS

Declaration of the channels for device pwm.h::PWM_DEV, at maximum six channels. 

1
{ GPIO27, GPIO32, GPIO33 }
SPI0_DEV

VSPI is used as spi.h::SPI_DEV 

1
VSPI
SPI0_SCK

VSPI SCK. 

1
GPIO18
SPI0_MISO

VSPI MISO. 

1
GPIO19
SPI0_MOSI

VSPI MOSI. 

1
GPIO23
SPI0_CS0

VSPI CS0. 

1
GPIO5
SPI1_DEV

HSPI is used as spi.h::SPI_DEV 

1
HSPI
SPI1_SCK

HSPI SCK. 

1
GPIO14
SPI1_MISO

HSPI MISO. 

1
GPIO12
SPI1_MOSI

HSPI MOSI. 

1
GPIO13
SPI1_CS0

HSPI CS0. 

1
GPIO15
UART0_TXD

direct I/O pin for uart.h::UART_DEV TxD, can’t be changed 

1
GPIO10
UART0_RXD

direct I/O pin for uart.h::UART_DEV RxD, can’t be changed 

1
GPIO9
UART1_TXD

direct I/O pin for uart.h::UART_DEV TxD 

1
GPIO10
UART1_RXD

direct I/O pin for uart.h::UART_DEV RxD 

1
GPIO9