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keybrd/unit_tests/PortRead_MCP23S17/PortRead_MCP23S17.ino

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822 B
C++

/* unit test for PortRead_MCP23S17
Picture of hardware is in unit_tests/PortRead_MCP23S17/PortRead_MCP23S17_bb.JPG
The setup is an MCP23S17 I/O expander on a Teensy LC controller.
MCP23S17 port-B pins are alternately grounded and energized.
portBState is a bitwise reading of port B.
output is: 10101010
*/
#include "PortIOE.h"
#include "PortRead_MCP23S17.h"
#include "Scanner_IOE.h"
const uint8_t PortIOE::DEVICE_ADDR = 0x20; //MCP23S17 address, all 3 ADDR pins are grounded
PortIOE portB(1, 0);
PortRead_MCP23S17 portBRead(portB, ~0);
void setup()
{
uint8_t portBState; //bit wise
delay(6000);
portBRead.begin(LOW);
portBState = portBRead.read();
Keyboard.print("portBState = ");
Keyboard.println(portBState, BIN); //prints 10101010
}
void loop() { }