I2C on B_L072Z_LRWAN1 platform

[awneil]

The HTS221 temperature sensor code in the Sensor Push, Pull, and Action examples doesn't work: apart from the initial toggling of SCK, there is no activity on the I2C bus.

This is because the final thing i2c_init does is to disable the clock to the I2C controller:

  I2C_CLK_DISABLE((uint32_t)(i2c_ports[idx].i2c));

  return &handle[idx];
}

and there is nothing in the rest of the code to re-enable it.

A fix is to add i2c_acquire(hts221_handle) and i2c_release(hts221_handle) around anything which requires I2C.

Having done that, I do see activity on the bus, and get temperature readings.

Using SHA-1: 42d6bbf

[glennergeerts]

Thanks, should be fixed in c25da89. I don't have the sensor shield available so it would be helpful if you could test this..

[awneil]

With the Sensor Action example from c25da89, I get:

00> [000] Device booted
00> 
00> 
00> [001] temp 226 dC
00> 
00> [002] tried to start an interface (226) that is not registered
00> 
00> [003] temp 226 dC
00> 
00> [004] tried to start an interface (226) that is not registered
00> 

with a little heat:

00> 
00> [053] temp 363 dC
00> 
00> [054] temp 366 dC
00> 
00> [055] temp 373 dC
00> 
00> [056] temp 356 dC
00> 
00> [057] temp 350 dC
00> 
00> [058] temp 347 dC
00> 

so values >255 displaying OK.

Not sure the significance of the "tried to start an interface (xxx) that is not registered" - but that behaviour is unchanged