26 lines
775 B
C++
26 lines
775 B
C++
/* unit test for PortMCP23S17
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Picture of hardware is in unit_tests/PortMCP23S17_read/PortMCP23S17_bb.JPG
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The setup is an MCP23S17 I/O expander on a Teensy LC controller.
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MCP23S17 port-B pins are alternately grounded and energized.
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output is: 10101010
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*/
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#include "Port_MCP23S17.h"
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const uint8_t IOE_ADDR = 0x20; //MCP23S17 address, all 3 ADDR pins grounded
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Port_MCP23S17 portB(IOE_ADDR, 1, ~0); //read all pins
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void setup()
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{
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uint8_t BitPattern; //reading of port B
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delay(6000);
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portB.begin(HIGH); //HIGH or LOW, does not matter
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BitPattern = portB.read();
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Keyboard.print("BitPattern = ");
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Keyboard.println(BitPattern, BIN); //prints 10101010
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}
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void loop() { }
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