This IC also features a three-pin address input, which can be used to identify and combine up to 8 boards on the same I²C bus. The address of each board can easily be set with configurable headers included on the board. The IC also includes a number of configurable Interrupt pins, ...
source.mcp.pinMode(MCP_INPUTPIN,INPUT);// Button i/p to GNDmcp.pullUp(MCP_INPUTPIN,HIGH);// Puled high ~100k// On interrupt, polariy is set HIGH/LOW (last parameter).mcp.setupInterrupts(MCP_INT_MIRROR,MCP_INT_ODR,LOW);mcp.setupInterruptPin(MCP_INPUTPIN,FALLING);mcp.readGPIOAB()...
mcp.pinMode(mcpPinA,输入); mcp.pullUp(mcpPinA,高);// 在内部开启 100K 上拉 mcp.setupInterruptPin(mcpPinA,FALLING); // 类似,但在端口 B。 mcp.pinMode(mcpPinB,输入); mcp.pullUp(mcpPinB, HIGH); // 在内部打开 100K 上拉电阻 mcp.setupInterruptPin(mcpPinB,FALLING); // 我们将从 int ...
[0] | 1ULL << (gpio_num_t)signals[sig].GPIO[1] | 1ULL << (gpio_num_t)signals[sig].GPIO[2]); //io_conf.mode = GPIO_MODE_OUTPUT; io_conf.mode = GPIO_MODE_INPUT_OUTPUT; io_conf.pull_up_en = GPIO_PULLUP_ENABLE; io_conf.intr_type = GPIO_INTR_DISABLE; gpio_config(&...
Can be enabled for interrupt-on-change and/or internal weak pull-up resistor. VDD VSS NC/CS 9 5 P Power 10 6 P Ground 11 7 I NC (MCP23017), Chip Select (MCP23S17) SCL/SCK 12 8 I Serial clock input SDA/SI 13 9 I/O Serial data I/O (MCP23017), Serial data input (MCP23S17...
bool begin(bool pullup = true) initializes library, returns true if successful. Default sets the pins to INPUT PULLUP. Returns false if not connected or a register could not be set. bool isConnected() returns true if connected, false otherwise. uint8_t getAddress() returns the address se...
Each I/O pin can be configured as an in input, output or an input with a pullup. You can set the i2c address for up to 8 unique MCP23017’s on the same i2c bus, which means you can daisy-chain these IC's to give you up to 128 I/O's!
input(pull=None) Configures the pin as input and optionally configures it to be pulled up. output(val=None) Configures the pin to be output and optionally sets it's value (0-1). Port methods init(port, mcp) Constructed with the port number (0-1) and a reference to the main class....
Pins can be set to be input, output, or input with a pullup Good for any 3.3V or 5V setup Add another 16 pins to your microcontroller using a MCP23017 port expander. The MCP23017 uses two i2c pins (these can be shared with other i2c devices), and in exchange gives you 16 g...
making it suitable for various power sources. The 16-bit remote bidirectional I/O port allows for the configuration of each pin as input or output, with the added flexibility of setting up pull-up resistors and enabling interrupt functions for input pins. This feature makes the module ideal ...