periph_conf.h File Reference

Peripheral configurations for the LILYGO TTGO T8 ESP32-S2 board. More...

Detailed Description

Peripheral configurations for the LILYGO TTGO T8 ESP32-S2 board.

The peripheral configurations in this file can be used for the LILYGO TTGO T8 ESP32-S2 board.

For detailed information about the peripheral configuration for ESP32-S2 boards, see section Common Peripherals.

Note

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

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   { GPIO1, GPIO2, GPIO4, GPIO5, GPIO6, GPIO7, GPIO8, GPIO9 }
	Declaration of GPIOs that can be used as ADC channels. More...
#define	DAC_GPIOS   { GPIO17, GPIO18 }
	Declaration of GPIOs that can be used as DAC channels. More...

I2C configuration
Only one I2C interface I2C_DEV(0) is defined. The GPIOs listed in the configuration are only initialized as I2C signals when module periph_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   GPIO7
	SCL signal of I2C_DEV(0)
#define	I2C0_SDA   GPIO8
	SDA signal of I2C_DEV(0)

PWM channel configuration
Two PWM devices are configured. These devices contain all GPIOs that are not defined as I2C, SPI or UART for this board. Generally, all outputs pins could be used as PWM channels. 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   { GPIO39, GPIO40, GPIO41, GPIO42 }
	Declaration of the channels for device PWM_DEV(0), at maximum PWM_CHANNEL_NUM_DEV_MAX.
#define	PWM1_GPIOS   { GPIO15, GPIO16 }
	Declaration of the channels for device PWM_DEV(1), at maximum PWM_CHANNEL_NUM_DEV_MAX. More...

SPI configuration
SPI_DEV(0) is used for the Display. The GPIOs are not broken out. SPI_DEV(1) is used for the SD Card slot. The GPIOs are broken out and can also be used by other devices. 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   FSPI
	FSPI (SPI Controller 2) is used as SPI_DEV(0)
#define	SPI0_SCK   GPIO36
	FSPICLK used as signal OLED_CLK
#define	SPI0_MISO   GPIO9
	FSPIHD dummy (not broken out), GPIO37 is used as DCX.
#define	SPI0_MOSI   GPIO35
	FSPID used as Display signal OLED_MOSI
#define	SPI0_CS0   GPIO34
	FSPICS0 used as Display signal OLED_CS
#define	SPI1_CTRL   HSPI
	HSPI (SPI Controller 3) is used as SPI_DEV(1)
#define	SPI1_SCK   GPIO12
	SPI SCK.
#define	SPI1_MISO   GPIO13
	SPI MISO.
#define	SPI1_MOSI   GPIO11
	SPI MOSI.
#define	SPI1_CS0   GPIO10
	SPI CS0 used for Display.

UART configuration
ESP32-S2 provides 2 UART interfaces at maximum: UART_DEV(0) uses fixed standard configuration. UART_DEV(1) is not used.
#define	UART0_TXD   GPIO43
	direct I/O pin for UART_DEV(0) TxD, can't be changed
#define	UART0_RXD   GPIO44
	direct I/O pin for UART_DEV(0) RxD, can't be changed

Macro Definition Documentation

ADC_GPIOS

#define ADC_GPIOS   { GPIO1, GPIO2, GPIO4, GPIO5, GPIO6, GPIO7, GPIO8, GPIO9 }

Declaration of GPIOs that can be used as ADC channels.

All ADC pins of ADC1 that are broken out are declared as ADC channels except GPIO3 which is a strapping pin. GPIO7 and GPIO8 are also used by I2C_DEV(0) if enabled. GPIO9 is not broken out and used to measure V_BAT.

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 54 of file periph_conf.h.

DAC_GPIOS

#define DAC_GPIOS   { GPIO17, GPIO18 }

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 65 of file periph_conf.h.

PWM1_GPIOS

#define PWM1_GPIOS   { GPIO15, GPIO16 }

Declaration of the channels for device PWM_DEV(1), at maximum PWM_CHANNEL_NUM_DEV_MAX.

These PWM channels cannot be used if an external 32 kHz crystal is connected to the board at GPIO15 and GPIO16 (configured by the DIP switches).

Definition at line 122 of file periph_conf.h.