OFM-GPIOModule

HAL for GPIOs

Usage

hardware.h

#define OPENKNX_GPIO_NUM 1
#define OPENKNX_GPIO_TYPES OPENKNX_GPIO_T_TCA9555
#define OPENKNX_GPIO_ADDRS 0x20
#define OPENKNX_GPIO_INTS 0xFF

#define OPENKNX_GPIO_WIRE Wire
#define OPENKNX_GPIO_CLOCK 400000
#define OPENKNX_GPIO_SDA 28
#define OPENKNX_GPIO_SCL 29

#define OPENKNX_xxx_PINS 0x010D, 0x010B, 0x0102, 0x0104

code

#include "GPIOModule.h"
..
openknx.addModule(4, openknxGPIOModule);
..
openknxGPIOModule.pinMode(24, OUTPUT);      // set MCU-GPIO 24 to OUTPUT
openknxGPIOModule.digitalWrite(24, HIGH);   // writes MCU-GPIO 24 to HIGH
openknxGPIOModule.digitalRead(0x0105);      // reads GPIO 5 of expander 0x01

Supported HW

Controller

RP2040 (single core)

MCU GPIOs (Arduino)

wraps the pinMode, digitalWrite, ... functions

TCA9555

TCA9555 16bit I2C port expander

Features

Current

pinMode, digitalRead, digitalWrite

Planned Features

• Interrupt handling
• analogRead/Write
• bulk setting of pins
• access with openknx.GPIO.

Further improvements

• Multicore
• ESP32
• expanders on different I2C units (e.g. 0x01 on Wire, 0x02 on Wire1)