periph_conf.h File Reference

Peripheral MCU configuration for Wemos LOLIN D32 Pro. More...

Detailed Description

Peripheral MCU configuration for Wemos LOLIN D32 Pro.

Wemos LOLIN D32 Pro is a development board that uses the ESP32-WROVER module which has a built-in 4 MByte SPI RAM. Most important features of the board are

• Micro-SD card interface
• LCD interface
• SPI RAM 4 MByte

Furthermore, most GPIOs are broken out for extension.

When the TFT display is connected, add

USEMODULE += esp_lolin_tft

to the makefile of the application to use the according default board configuration.

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

Note

Most definitions can be overridden by an application-specific board configuration.

Author

Gunar Schorcht gunar.nosp@m.@sch.nosp@m.orcht.nosp@m..net

Definition in file periph_conf.h.

#include <stdint.h>
#include "periph_conf_common.h"

Include dependency graph for periph_conf.h:

Go to the source code of this file.

ADC and DAC channel configuration
#define	ADC_GPIOS   { GPIO36, GPIO39, GPIO34, GPIO35, GPIO32, GPIO33 }
	Declaration of GPIOs that can be used as ADC channels. More...
#define	DAC_GPIOS   { GPIO25, GPIO26 }
	Declaration of GPIOs that can be used as DAC channels. More...

I2C configuration
Only I2C interface I2C_DEV(0) is used. Note The GPIOs listed in the configuration are only initialized as I2C signals when module perpih_i2c is used. Otherwise they are not allocated and can be used for other purposes.
#define	I2C0_SPEED   I2C_SPEED_FAST
	I2C bus speed of I2C_DEV(0)
#define	I2C0_SCL   GPIO22
	SCL signal of I2C_DEV(0) [UEXT1].
#define	I2C0_SDA   GPIO21
	SDA signal of I2C_DEV(0) [UEXT1].

PWM channel configuration
Note As long as the according PWM device is not initialized with the pwm_init, the GPIOs declared for this device can be used for other purposes.
#define	PWM0_GPIOS   { GPIO0, GPIO2 }
	PWM channels for device PWM_DEV(0)
#define	PWM1_GPIOS   { }
	PWM_DEV(1) is not used.

SPI configuration
Note The GPIOs listed in the configuration are first initialized as SPI signals when the corresponding SPI interface is used for the first time by either calling the spi_init_cs function or the spi_acquire function. That is, they are not allocated as SPI signals before and can be used for other purposes as long as the SPI interface is not used.
#define	SPI0_CTRL   VSPI
	VSPI is used as SPI_DEV(0)
#define	SPI0_SCK   GPIO18
	VSPI SCK.
#define	SPI0_MISO   GPIO19
	VSPI MISO.
#define	SPI0_MOSI   GPIO23
	VSPI MOSI.
#define	SPI0_CS0   GPIO5
	VSPI CS0.

UART configuration
ESP32 provides 3 UART interfaces at maximum: UART_DEV(0) uses fixed standard configuration. UART_DEV(1) is not used. UART_DEV(2) is not used.
#define	UART0_TXD   GPIO1
	direct I/O pin for UART_DEV(0) TxD, can't be changed
#define	UART0_RXD   GPIO3
	direct I/O pin for UART_DEV(0) RxD, can't be changed

Macro Definition Documentation

ADC_GPIOS

#define ADC_GPIOS   { GPIO36, GPIO39, GPIO34, GPIO35, GPIO32, GPIO33 }

Declaration of GPIOs that can be used as ADC channels.

GPIO35 is used to measure V_BAT and is therefore not broken out.

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.

Definition at line 68 of file periph_conf.h.

DAC_GPIOS

#define DAC_GPIOS   { GPIO25, GPIO26 }

Declaration of GPIOs that can be used 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.

Definition at line 82 of file periph_conf.h.