Commit Graph

9 Commits

Author SHA1 Message Date
Damien George 64180f0742 extmod/machine_i2c: Add init protocol method for generic I2C bindings.
Hardware I2C implementations must provide a .init() protocol method if they
want to support reconfiguration.  Otherwise the default is that i2c.init()
raises an OSError (currently the case for all ports).

mp_machine_soft_i2c_locals_dict is renamed to mp_machine_i2c_locals_dict to
match the generic SPI bindings.

Fixes issue #6623 (where calling .init() on a HW I2C would crash).

Signed-off-by: Damien George <damien@micropython.org>
2020-11-23 19:45:04 +11:00
Damien George 71f3ade770 ports: Support legacy soft I2C/SPI construction via id=-1 arg.
With a warning that this way of constructing software I2C/SPI is
deprecated.  The check and warning will be removed in a future release.

This should help existing code to migrate to the new SoftI2C/SoftSPI types.

Signed-off-by: Damien George <damien@micropython.org>
2020-10-01 12:57:10 +10:00
Damien George c35deb2625 extmod/machine_i2c: Rename type to SoftI2C and add custom print method.
Also rename machine_i2c_type to mp_machine_soft_i2c_type.  These changes
make it clear that it's a soft-I2C implementation, and match SoftSPI.

Signed-off-by: Damien George <damien@micropython.org>
2020-10-01 12:57:10 +10:00
Damien George 606ea2b10f extmod/machine_i2c: Change C-level API to allow split I2C transactions.
API is:

    int transfer(
        mp_obj_base_t *obj,
        uint16_t addr,
        size_t n,
        mp_machine_i2c_buf_t *bufs,
        unsigned int flags
    )
2019-05-20 15:04:29 +10:00
Alexander Steffen 299bc62586 all: Unify header guard usage.
The code conventions suggest using header guards, but do not define how
those should look like and instead point to existing files. However, not
all existing files follow the same scheme, sometimes omitting header guards
altogether, sometimes using non-standard names, making it easy to
accidentally pick a "wrong" example.

This commit ensures that all header files of the MicroPython project (that
were not simply copied from somewhere else) follow the same pattern, that
was already present in the majority of files, especially in the py folder.

The rules are as follows.

Naming convention:
* start with the words MICROPY_INCLUDED
* contain the full path to the file
* replace special characters with _

In addition, there are no empty lines before #ifndef, between #ifndef and
one empty line before #endif. #endif is followed by a comment containing
the name of the guard macro.

py/grammar.h cannot use header guards by design, since it has to be
included multiple times in a single C file. Several other files also do not
need header guards as they are only used internally and guaranteed to be
included only once:
* MICROPY_MPHALPORT_H
* mpconfigboard.h
* mpconfigport.h
* mpthreadport.h
* pin_defs_*.h
* qstrdefs*.h
2017-07-18 11:57:39 +10:00
Damien George 8b74048d2a extmod/machine_i2c: Expose soft I2C obj and readfrom/writeto funcs.
For external use by ports if needed.
2016-11-24 00:11:45 +11:00
Damien George 07e83573c8 extmod/machine_i2c: Add 'nack' argument to i2c.readinto. 2016-11-23 17:05:38 +11:00
Damien George b983cfaf41 extmod/machine_i2c: Add a C-level I2C-protocol, refactoring soft I2C. 2016-11-23 17:05:37 +11:00
Damien George d083712224 extmod: Add generic machine.I2C class, with bit-bang I2C.
Should work on any machine that provides the correct pin functions.
2016-04-12 14:06:54 +01:00