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6 Commits

Author SHA1 Message Date
Julia 3966f67746 zephyr/machine_spi: Add support for hardware SPI. 
Adds support for hardware SPI to the zephyr port.  Consistent with other
ports, such as rp2 and stm32, we only implement the SPI protocol functions
(init and transfer).  Explicit sck/mosi/miso selection is not supported
and new SPI instances are initialized with default values.
 2021-07-06 00:00:57 +10:00
Yonatan Schachter 063d7cc0e2 zephyr: Add basic UART functionality to machine module. 
Currently supports only polling read and write.

Signed-off-by: Yonatan Schachter <yonatan.schachter@gmail.com>
 2021-01-23 16:31:00 +11:00
Damien George 39d50d129c ports: Add SoftI2C and SoftSPI to machine module where appropriate. 
Previous commits removed the ability for one I2C/SPI constructor to
construct both software- or hardware-based peripheral instances.  Such
construction is now split to explicit soft and non-soft types.

This commit makes both types available in all ports that previously could
create both software and hardware peripherals: machine.I2C and machine.SPI
construct hardware instances, while machine.SoftI2C and machine.SoftSPI
create software instances.

This is a breaking change for use of software-based I2C and SPI.  Code that
constructed I2C/SPI peripherals in the following way will need to be
changed:

    machine.I2C(-1, ...)            ->  machine.SoftI2C(...)
    machine.I2C(scl=scl, sda=sda)   ->  machine.SoftI2C(scl=scl, sda=sda)

    machine.SPI(-1, ...)            ->  machine.SoftSPI(...)
    machine.SPI(sck=sck, mosi=mosi, miso=miso)
                        ->  machine.SoftSPI(sck=sck, mosi=mosi, miso=miso)

Code which uses machine.I2C and machine.SPI classes to access hardware
peripherals does not need to change.

Signed-off-by: Damien George <damien@micropython.org>
 2020-10-01 12:57:10 +10:00
Maureen Helm f842e32155 zephyr: Const-ify struct device instance pointers. 
Zephyr v2.4.0 added a const qualifier to usages of struct device to
allow storing device driver instances exclusively in flash and thereby
reduce ram footprint.

Signed-off-by: Maureen Helm <maureen.helm@nxp.com>
 2020-09-30 23:21:53 +10:00
Damien George f84145bea1 zephyr: Implement machine.Pin.irq() for setting callbacks on pin change. 
Supports hard and soft interrupts.  In the current implementation, soft
interrupt callbacks will only be called when the VM is executing, ie they
will not be called during a blocking kernel call like k_msleep.  And the
behaviour of hard interrupt callbacks will depend on the underlying device,
as well as the amount of ISR stack space.

Soft and hard interrupts tested on frdm_k64f and nucleo_f767zi boards.

Signed-off-by: Damien George <damien@micropython.org>
 2020-06-30 22:33:41 +10:00
Damien George 01dd7804b8 ports: Make new ports/ sub-directory and move all ports there. 
This is to keep the top-level directory clean, to make it clear what is
core and what is a port, and to allow the repository to grow with new ports
in a sustainable way.
 2017-09-06 13:40:51 +10:00