I2C_MASTER not declared in the scope

[shreyamantu]

I2C_MASTER and multiple other objects not declared in this scope. Am i missing a header file ?

[kriswiner]

I have no idea what you are doing.

…

On Wed, May 17, 2017 at 5:42 AM, shreyamantu ***@***.***> wrote: I2C_MASTER and multiple other objects not declared in this scope. Am i missing a header file ? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#7>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AGY1qnT2amoO6jppECLDHPGn0zS9JQnKks5r6usggaJpZM4NdzlA> .

[agademer]

I2C_Master is not declared when you comment the teensie lib and try to use Wire.h

Most of "error" lines add a commented version, so I have reverted them and it seems to work.

Original code :
// Wire.begin();
// TWBR = 12; // 400 kbit/sec I2C speed for Pro Mini
// Setup for Master mode, pins 16/17, external pullups, 400kHz for Teensy 3.1
Wire.begin(I2C_MASTER, 0x00, I2C_PINS_16_17, I2C_PULLUP_EXT, I2C_RATE_400);

Code for Wire.h
Wire.begin(); // <= UNCOMMENTED
// TWBR = 12; // 400 kbit/sec I2C speed for Pro Mini
// Setup for Master mode, pins 16/17, external pullups, 400kHz for Teensy 3.1
// Wire.begin(I2C_MASTER, 0x00, I2C_PINS_16_17, I2C_PULLUP_EXT, I2C_RATE_400); // <= COMMENTED

etc.

The question is a bit old, but I thought it might help someone in the future.

Still I'm a bit sorry because you use 2482 bytes of memory and Arduino Uno has only 2048 byte available :p
I will try to see if I can get rid of some intermediary variable... :(

Thanks nonetheless for the great code and explanation associated !