New Adafruit MCP23017 library

Using Arduino LEDs and Multiplexing
1

Seems like the header file contain meaningless code:

#define MCP23XXX_ADDR 0x20 //!< Default I2C Address
#define MCP23XXX_SPIREG                                                        \
  ADDRESSED_OPCODE_BIT0_LOW_TO_WRITE //!< SPI register type

#define MCP_PORT(pin) ((pin < 8) ? 0 : 1) //!< Determine port from pin number

Causing error:

In file included from C:\Users\dahls\Documents\Arduino\libraries\Adafruit_MCP23017_Arduino_Library\src\Adafruit_MCP23XXX.cpp:23:0:

C:\Users\dahls\Documents\Arduino\libraries\Adafruit_MCP23017_Arduino_Library\src\Adafruit_MCP23XXX.cpp: In member function 'void Adafruit_MCP23XXX::pinMode(uint8_t, uint8_t)':

C:\Users\dahls\Documents\Arduino\libraries\Adafruit_MCP23017_Arduino_Library\src\Adafruit_MCP23XXX.h:29:3: error: 'ADDRESSED_OPCODE_BIT0_LOW_TO_WRITE' was not declared in this scope

   ADDRESSED_OPCODE_BIT0_LOW_TO_WRITE //!< SPI register type

   ^

C:\Users\dahls\Documents\Arduino\libraries\Adafruit_MCP23017_Arduino_Library\src\Adafruit_MCP23XXX.h:29:3: note: in definition of macro 'MCP23XXX_SPIREG'

   ADDRESSED_OPCODE_BIT0_LOW_TO_WRITE //!< SPI register type

   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Or is it something I'm missing?

2

When you went to the GitHub location of the Adafruit Library in question and asked the same question there, after all they wrote the dang thing, what was the response?

3

Hi,
I just updated the Adafruit library, using the IDE library manager and the 23017 examples compiled ok.

How did you load/update your library?
I have now got Verision 2.0.2

Tom... :smiley: :+1: :coffee: :australia:

4

This seems to be the file: https://github.com/adafruit/Adafruit-MCP23017-Arduino-Library/blob/master/src/Adafruit_MCP23XXX.h

Do you also have the newest BusIO library ?
Because that is where "ADDRESSED_OPCODE_BIT0_LOW_TO_WRITE" is defined. It is inside this typedef enum: https://github.com/adafruit/Adafruit_BusIO/blob/master/Adafruit_BusIO_Register.h#L34

Which Arduino IDE version do you use and which Arduino board ?

5

The old version of the library (which I have reverted back to), is 1.3.0. The new one was updated by using the Tools > Manage Libraries and selecting the update able ones.

Current version of BusIO is 1.7.1.

6

Hi,
Can you post your code that gives these errors?
Or a smaller code that does the same thing?

What model Arduino are you using?

I got a succesfull compile of the example with Nano selected.

Thanks.. Tom... :smiley: :+1: :coffee: :australia:

7

I'm using a Mega2560 but I guess the error will appear with UNO or Nano.
The code is big and since I have restored the library to the old version, I need to update it again and change my own libraries to get the error. I'll try to do that later.

8

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