MCP23017

MCP23017 x 16LED @ ARDUINO
16-bit remote bidirectional I/O port

1.8...5.5V DC

Low standby current: 1 µA

// COUNT 0..65535 IN BINARY:
  for (uint16_t i=0; i < 0xFFFF ; i++) {     // cycle
      mcp.writeGPIOAB(i);
  }


// DULL PWM:

 for (int ir=0; ir < 2000 ; ir++) {
  mcp.writeGPIOAB(0b0000000000000000);
  mcp.writeGPIOAB(0b1111111111111111);
  mcp.writeGPIOAB(0b0111111111111111);
  mcp.writeGPIOAB(0b0011111111111111);
  mcp.writeGPIOAB(0b0001111111111111);
  mcp.writeGPIOAB(0b0000111111111111);
  mcp.writeGPIOAB(0b0000011111111111);
  mcp.writeGPIOAB(0b0000001111111111);
  mcp.writeGPIOAB(0b0000000111111111);
  mcp.writeGPIOAB(0b0000000011111111);
  mcp.writeGPIOAB(0b0000000001111111);
  mcp.writeGPIOAB(0b0000000000111111);
  mcp.writeGPIOAB(0b0000000000011111);
  mcp.writeGPIOAB(0b0000000000001111);
  mcp.writeGPIOAB(0b0000000000000111);
  mcp.writeGPIOAB(0b0000000000000011);
  mcp.writeGPIOAB(0b0000000000000001); }