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#include <Adafruit_MCP23X17.h>
#define ir1 0 // GPA0
#define ir2 1 // GPA1
#define ir3 2 // GPA2
#define ir4 3 // GPA3
#define ir5 4 // GPA4
#define ir6 5 // GPA5
#define ir7 6 // GPA6
#define ir8 7 // GPA7
#define ir9 8 // GPB0
#define ir10 9 // GPB1
#define ir11 10 // GPB2
#define ir12 11 // GPB3
#define ir13 12 // GPB4
#define ir14 13 // GPB5
#define ir15 14 // GPB6
#define ir16 15 // GPB7
int dir1 = 1; // data IR1
int dir2 = 1; // data IR2
int dir3 = 1; // etc
int dir4 = 1;
int dir5 = 1;
int dir6 = 1;
int dir7 = 1;
int dir8 = 1;
int dir9 = 1;
int dir10 = 1;
int dir11 = 1;
int dir12 = 1;
int dir13 = 1;
int dir14 = 1;
int dir15 = 1;
int dir16 = 1;
int dir17 = 1; // data IR17
int dir18 = 1; // data IR18
int dir19 = 1; // etc
int dir20 = 1;
int dir21 = 1;
int dir22 = 1;
int dir23 = 1;
int dir24 = 1;
int dir25 = 1;
int dir26 = 1;
int dir27 = 1;
int dir28 = 1;
int dir29 = 1;
int dir30 = 1;
int dir31 = 1;
int dir32 = 1;
// Instance for the first MCP23017 at address 0x20
Adafruit_MCP23X17 mcp1;
// Instance for the second MCP23017 at address 0x22
Adafruit_MCP23X17 mcp2;
void setup() {
Serial.begin(9600);
while (!Serial);
Serial.println("MCP23xxx Button Test!");
// Initialize first MCP23017 with I2C address 0x20
if (!mcp1.begin_I2C(0x20)) {
Serial.println("Error initializing MCP23017 at 0x20.");
while (1);
}
// Initialize second MCP23017 with I2C address 0x22
if (!mcp2.begin_I2C(0x22)) {
Serial.println("Error initializing MCP23017 at 0x22.");
while (1);
}
// Configure pins for the first MCP23017 (0x20)
mcp1.pinMode(ir1, INPUT);
mcp1.pinMode(ir2, INPUT);
mcp1.pinMode(ir3, INPUT);
mcp1.pinMode(ir4, INPUT);
mcp1.pinMode(ir5, INPUT);
mcp1.pinMode(ir6, INPUT);
mcp1.pinMode(ir7, INPUT);
mcp1.pinMode(ir8, INPUT);
mcp1.pinMode(ir9, INPUT);
mcp1.pinMode(ir10, INPUT);
mcp1.pinMode(ir11, INPUT);
mcp1.pinMode(ir12, INPUT);
mcp1.pinMode(ir13, INPUT);
mcp1.pinMode(ir14, INPUT);
mcp1.pinMode(ir15, INPUT);
mcp1.pinMode(ir16, INPUT);
// Configure pins for the second MCP23017 (0x22)
mcp2.pinMode(ir1, INPUT);
mcp2.pinMode(ir2, INPUT);
mcp2.pinMode(ir3, INPUT);
mcp2.pinMode(ir4, INPUT);
mcp2.pinMode(ir5, INPUT);
mcp2.pinMode(ir6, INPUT);
mcp2.pinMode(ir7, INPUT);
mcp2.pinMode(ir8, INPUT);
mcp2.pinMode(ir9, INPUT);
mcp2.pinMode(ir10, INPUT);
mcp2.pinMode(ir11, INPUT);
mcp2.pinMode(ir12, INPUT);
mcp2.pinMode(ir13, INPUT);
mcp2.pinMode(ir14, INPUT);
mcp2.pinMode(ir15, INPUT);
mcp2.pinMode(ir16, INPUT);
Serial.println("Looping...");
}
void loop() {
// Read pins from the first MCP23017 (0x20)
dir1 = mcp1.digitalRead(ir1);
dir2 = mcp1.digitalRead(ir2);
dir3 = mcp1.digitalRead(ir3);
dir4 = mcp1.digitalRead(ir4);
dir5 = mcp1.digitalRead(ir5);
dir6 = mcp1.digitalRead(ir6);
dir7 = mcp1.digitalRead(ir7);
dir8 = mcp1.digitalRead(ir8);
dir9 = mcp1.digitalRead(ir9);
dir10 = mcp1.digitalRead(ir10);
dir11 = mcp1.digitalRead(ir11);
dir12 = mcp1.digitalRead(ir12);
dir13 = mcp1.digitalRead(ir13);
dir14 = mcp1.digitalRead(ir14);
dir15 = mcp1.digitalRead(ir15);
dir16 = mcp1.digitalRead(ir16);
// Read pins from the second MCP23017 (0x22)
dir17 = mcp2.digitalRead(ir1);
dir18 = mcp2.digitalRead(ir2);
dir19 = mcp2.digitalRead(ir3);
dir20 = mcp2.digitalRead(ir4);
dir21 = mcp2.digitalRead(ir5);
dir22 = mcp2.digitalRead(ir6);
dir23 = mcp2.digitalRead(ir7);
dir24 = mcp2.digitalRead(ir8);
dir25 = mcp2.digitalRead(ir9);
dir26 = mcp2.digitalRead(ir10);
dir27 = mcp2.digitalRead(ir11);
dir28 = mcp2.digitalRead(ir12);
dir29 = mcp2.digitalRead(ir13);
dir30 = mcp2.digitalRead(ir14);
dir31 = mcp2.digitalRead(ir15);
dir32 = mcp2.digitalRead(ir16);
// Print the results from the first MCP23017 (0x20)
Serial.print("MCP23017 @ 0x20: ");
Serial.print(dir1); Serial.print(", "); Serial.print(dir2);
Serial.print(", "); Serial.print(dir3); Serial.print(", "); Serial.print(dir4);
Serial.print(", "); Serial.print(dir5); Serial.print(", "); Serial.print(dir6);
Serial.print(", "); Serial.print(dir7); Serial.print(", "); Serial.print(dir8);
Serial.print(", "); Serial.print(dir9); Serial.print(", "); Serial.print(dir10);
Serial.print(", "); Serial.print(dir11); Serial.print(", "); Serial.print(dir12);
Serial.print(", "); Serial.print(dir13); Serial.print(", "); Serial.print(dir14);
Serial.print(", "); Serial.print(dir15); Serial.print(", "); Serial.print(dir16);
// Print the results from the second MCP23017 (0x22)
Serial.print(" MCP23017 @ 0x22: ");
Serial.print(dir17); Serial.print(", "); Serial.print(dir18);
Serial.print(", "); Serial.print(dir19); Serial.print(", "); Serial.print(dir20);
Serial.print(", "); Serial.print(dir21); Serial.print(", "); Serial.print(dir22);
Serial.print(", "); Serial.print(dir23); Serial.print(", "); Serial.print(dir24);
Serial.print(", "); Serial.print(dir25); Serial.print(", "); Serial.print(dir26);
Serial.print(", "); Serial.print(dir27); Serial.print(", "); Serial.print(dir28);
Serial.print(", "); Serial.print(dir29); Serial.print(", "); Serial.print(dir30);
Serial.print(", "); Serial.print(dir31); Serial.print(", "); Serial.println(dir32);
Serial.println();
delay(250);
}
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