Board and pin definitions

Default GPIO assignments for peripherals on the JTKJ HAT. More...

I²C Bus (default)
I2C bus pins.
#define	DEFAULT_I2C_SDA_PIN   12
#define	DEFAULT_I2C_SCL_PIN   13

Interrupts from Sensors
#define	HDC2021_INTERRUPT   21
#define	HDC2021_INTERRUPT   21
#define	VEML6030_INTERRUPT   9
#define	ICM42670_INT   6

Buttons / Switches
#define	SW1_PIN   2
#define	SW2_PIN   22

LEDs
#define	RED_LED_PIN   14

Buzzer
#define	BUZZER_PIN   17

RGB LED (common-anode)
#define	RGB_LED_R   18
#define	RGB_LED_G   19
#define	RGB_LED_B   20

PDM Microphone
#define	PDM_DATA   16
#define	PDM_CLK   15

Detailed Description

Default GPIO assignments for peripherals on the JTKJ HAT.

These macros define the GPIO pin numbers for peripherals and interfaces used by the SDK. They can be referenced directly or overridden at compile time if custom wiring is used.

Default pinout:

Function	Macro	GPIO	Notes
I²C SDA	DEFAULT_I2C_SDA_PIN	12	Default I²C data
I²C SCL	DEFAULT_I2C_SCL_PIN	13	Default I²C clock
UART0	DEFAULT_UART_0	0	Primary UART port
UART1	DEFAULT_UART_1	1	Secondary UART port
SW1	SW1_PIN / BUTTON1	2	User button 1
SW2	SW2_PIN / BUTTON2	22	User button 2
Red LED	RED_LED_PIN / LED1	14	Onboard LED
RGB LED R	RGB_LED_R	18	RGB red channel
RGB LED G	RGB_LED_G	19	RGB green channel
RGB LED B	RGB_LED_B	20	RGB blue channel
Buzzer	BUZZER_PIN	17	Active buzzer
PDM DATA	PDM_DATA	16	Microphone data line
PDM CLK	PDM_CLK	15	Microphone clock line
VEML6030 Interrupt	VEML6030_INTERRUPT	9	Light sensor INT pin
HDC2021 Interrupt	HDC2021_INTERRUPT	21	Temp/humidity INT pin
ICM42670 Interrupt	ICM42670_INT	6	IMU INT1 pin

Note

These pin numbers correspond to the Raspberry Pi Pico GPIO numbers.

Macro Definition Documentation

BUZZER_PIN

#define BUZZER_PIN   17

Buzzer control pin (GPIO 17)

DEFAULT_I2C_SCL_PIN

#define DEFAULT_I2C_SCL_PIN   13

I²C clock pin (SCL)

DEFAULT_I2C_SDA_PIN

#define DEFAULT_I2C_SDA_PIN   12

I²C data pin (SDA)

HDC2021_INTERRUPT [1/2]

#define HDC2021_INTERRUPT   21

Temperature & humidity sensor interrupt pin (GPIO 21)

Temperature & humidity sensor interrupt pin

HDC2021_INTERRUPT [2/2]

#define HDC2021_INTERRUPT   21

Temperature & humidity sensor interrupt pin (GPIO 21)

Temperature & humidity sensor interrupt pin

ICM42670_INT

#define ICM42670_INT   6

IMU interrupt pin

PDM_CLK

#define PDM_CLK   15

Microphone clock output (GPIO 15)

PDM_DATA

#define PDM_DATA   16

Microphone data input (GPIO 16)

RED_LED_PIN

#define RED_LED_PIN   14

Onboard red LED pin (GPIO 14)

RGB_LED_B

#define RGB_LED_B   20

RGB LED blue channel (GPIO 20)

RGB_LED_G

#define RGB_LED_G   19

RGB LED green channel (GPIO 19)

RGB_LED_R

#define RGB_LED_R   18

RGB LED red channel (GPIO 18)

SW1_PIN

#define SW1_PIN   2

SW1 button pin (GPIO 2)

SW2_PIN

#define SW2_PIN   22

SW2 button pin (GPIO 22)

VEML6030_INTERRUPT

#define VEML6030_INTERRUPT   9

Ambient light sensor interrupt pin