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6 Commits

Author SHA1 Message Date
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
Damien George ee50a6effe py/mphal.h: Introduce mp_hal_time_ns and implement on various ports. 
This should return a 64-bit value being the number of nanoseconds since
1970/1/1.

Signed-off-by: Damien George <damien@micropython.org>
 2020-08-22 16:13:44 +10:00
Maureen Helm 6aff27ac3c zephyr: Update to new zephyr timeout API. 
Updates the zephyr port to use the new timeout api introduced in zephyr
2.3.
 2020-06-12 10:24:54 +10:00
Maureen Helm a7663b862e zephyr: Replace deprecated time conversion macro. 
The SYS_CLOCK_HW_CYCLES_TO_NS macro was deprecated in zephyr commit
8892406c1de21bd5de5877f39099e3663a5f3af1.  This commit updates MicroPython
to use the new k_cyc_to_ns_floor64 api and fix build warnings in the zephyr
port.

This change is compatible with Zephyr v2.1 and later.
 2020-02-04 17:09:59 +11:00
Maureen Helm 2befcb8a9d zephyr/i2c: Add support for hardware i2c. 
Adds support for hardware i2c to the zephyr port. Similar to other ports
such as stm32 and nrf, we only implement the i2c protocol functions
(readfrom and writeto) and defer memory operations (readfrom_mem,
readfrom_mem_into, and writeto_mem) to the software i2c implementation.
This may need to change in the future because zephyr is considering
deprecating its i2c_transfer function in favor of i2c_write_read; in this
case we would probably want to implement the memory operations directly
using i2c_write_read.

Tested with the accelerometer on frdm_k64f and bbc_microbit boards.
 2019-03-26 16:16:26 +11:00
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