Wire library missing setClock or setSpeed?

[dspdon 0]

I am failing to compile some legacy Arduino projects that call Wire.setClock() (or Wire.setSpeed()).

 

Are these unsupported in the Energia IDE library implementations?

 

I looked but didn't find them in $\hardware\cc3200\libraries\Wire\Wire.c or Wire.h.

 

How else to set 400kHz I2C operation (vs default 100 kHz)?

 

--Don

 

[spirilis 1,265]

I didn't know Arduino had that!  Seems like it would be a good thing to add.

[dspdon 0]

A review of Arduino Wire lib shows the public declaration:

    void setClock(uint32_t);

 

and something rather hardware-specific in the implementation, e.g.,

   void TwoWire::setClock(uint32_t frequency) {

     TWBR = ((F_CPU / frequency) - 16) / 2;           // <-- specific to AVR

   }

 

I'm new to the RBL CC3200 device I'm attempting to bring-up.  If anyone has modified the I2C bus speed on this device, I'll be happy to get your input.  My need is for a write-once setting at system initialization, nothing dynamic.

[khoi 2]

Hi there.

In function Wire.begin

You can find

ROM_I2CMasterInitExpClk(MASTER_BASE, F_CPU, false)

set it to

ROM_I2CMasterInitExpClk(MASTER_BASE, F_CPU, true) for 400khz