micropython/ports/rp2
Jim Mussared 9573d31071 all: Remove query-variants make target.
This is difficult to implement on cmake-based ports, and having the list
of variants in mpconfigboard.{cmake,mk} duplicates information that's
already in board.json.

This removes the existing query-variants make target from stm32 & rp2
and the definition of BOARD_VARIANTS from the various board files.

Also renames the cmake variable to MICROPY_BOARD_VARIANT to match other
variables such as MICROPY_BOARD. The make variable stays as
BOARD_VARIANT.

This work was funded through GitHub Sponsors.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
2023-08-15 17:37:44 +10:00
..
boards all: Remove query-variants make target. 2023-08-15 17:37:44 +10:00
btstack_inc rp2: Add Bluetooth support via cyw43. 2023-06-14 22:20:20 +10:00
lwip_inc rp2/lwip_inc: Enable lwIP status callback. 2022-06-30 16:03:21 +10:00
mbedtls extmod/mbedtls: Enable elliptic curve DH and DSA cryptography. 2022-10-22 19:08:21 +11:00
modules all: Replace all uses of umodule in Python code. 2023-06-08 17:54:24 +10:00
CMakeLists.txt rp2: Add Bluetooth support via cyw43. 2023-06-14 22:20:20 +10:00
cyw43_configport.h rp2: Add Bluetooth support via cyw43. 2023-06-14 22:20:20 +10:00
fatfs_port.c rp2/fatfs_port: Fix the modification date of files. 2022-10-12 00:31:38 +11:00
help.c ports: Standardise docs link in help text. 2023-06-02 11:48:46 +10:00
machine_adc.c py/obj: Convert make_new into a mp_obj_type_t slot. 2022-09-19 19:06:15 +10:00
machine_bitstream.c rp2/machine_bitstream: Implement the machine.bitstream driver. 2021-11-17 10:01:15 +11:00
machine_i2c.c rp2/machine_i2c: Add timeout parameter for machine.I2C(). 2023-04-21 18:03:33 +10:00
machine_i2s.c ports: In machine_i2s.c, rename uasyncio to asyncio. 2023-06-19 18:36:54 +10:00
machine_pin_cyw43.c rp2/machine_pin: Add support for named pins and alternate functions. 2023-01-16 11:44:26 +11:00
machine_pin.c rp2/machine_pin: Factor out pin-find code from machine_pin_make_new. 2023-07-20 17:30:17 +10:00
machine_pin.h rp2/machine_pin: Add support for named pins and alternate functions. 2023-01-16 11:44:26 +11:00
machine_pwm.c rp2/machine_pwm: Add duty_x() checks and return 0 if PWM is not started. 2023-05-04 13:18:58 +10:00
machine_rtc.c py/obj: Convert make_new into a mp_obj_type_t slot. 2022-09-19 19:06:15 +10:00
machine_spi.c py/obj: Convert make_new into a mp_obj_type_t slot. 2022-09-19 19:06:15 +10:00
machine_timer.c py/obj: Convert make_new into a mp_obj_type_t slot. 2022-09-19 19:06:15 +10:00
machine_uart.c rp2/machine_uart: Fix setting of UART LCR parameters. 2023-03-22 16:21:48 +11:00
machine_wdt.c py/obj: Convert make_new into a mp_obj_type_t slot. 2022-09-19 19:06:15 +10:00
main.c rp2: Add Bluetooth support via cyw43. 2023-06-14 22:20:20 +10:00
Makefile all: Remove query-variants make target. 2023-08-15 17:37:44 +10:00
memmap_mp.ld all: Fix spelling mistakes based on codespell check. 2023-04-27 18:03:06 +10:00
modmachine.c all: Use MP_REGISTER_EXTENSIBLE_MODULE for overrideable built-ins. 2023-06-08 17:54:21 +10:00
modmachine.h rp2/machine_pwm: Enable keyword args in constructor and add init method. 2023-05-04 13:13:05 +10:00
modos.c all: Rename *umodule*.c to remove the "u" prefix. 2023-06-08 17:54:17 +10:00
modrp2.c rp2/modrp2: Disable other core, shorten delay to 8us in bootsel_button. 2023-03-09 11:44:20 +11:00
modrp2.h rp2: Add new port to Raspberry Pi RP2 microcontroller. 2021-01-30 00:42:29 +11:00
modtime.c all: Rename *umodule*.c to remove the "u" prefix. 2023-06-08 17:54:17 +10:00
mpbthciport.c rp2/mpbthciport: Cancel existing alarms. 2023-06-14 22:20:20 +10:00
mpbthciport.h rp2: Add Bluetooth support via cyw43. 2023-06-14 22:20:20 +10:00
mpbtstackport.c rp2: Add Bluetooth support via cyw43. 2023-06-14 22:20:20 +10:00
mpconfigport.h rp2: Add Bluetooth support via cyw43. 2023-06-14 22:20:20 +10:00
mphalport.c all: Rename mp_umodule*, mp_module_umodule* to remove the "u" prefix. 2023-06-08 17:54:04 +10:00
mphalport.h rp2/machine_pin: Fix configuring OPEN_DRAIN with initial value. 2023-01-24 17:29:45 +11:00
mpnetworkport.c rp2: Add Bluetooth support via cyw43. 2023-06-14 22:20:20 +10:00
mpnetworkport.h stm32: Update to use the open-source lib version of cyw43-driver. 2023-03-01 01:27:12 +11:00
mpnimbleport.c rp2: Add support for bluetooth module using NimBLE. 2021-09-19 23:09:59 +10:00
mpnimbleport.h rp2: Add support for bluetooth module using NimBLE. 2021-09-19 23:09:59 +10:00
mpthreadport.c all: Fix spelling mistakes based on codespell check. 2023-04-27 18:03:06 +10:00
mpthreadport.h rp2/mpthreadport: Add mp_thread_deinit to reset core1 on soft reset. 2021-05-09 00:08:30 +10:00
msc_disk.c rp2: Add USB MSC support. 2022-03-09 00:38:07 +11:00
pendsv.c rp2/pendsv: Add MICROPY_BOARD_PENDSV_ENTRIES for board customisation. 2023-03-07 15:59:37 +11:00
pendsv.h rp2/pendsv: Add MICROPY_BOARD_PENDSV_ENTRIES for board customisation. 2023-03-07 15:59:37 +11:00
qstrdefsport.h rp2: Add new port to Raspberry Pi RP2 microcontroller. 2021-01-30 00:42:29 +11:00
README.md all: Rename MP_QSTR_umodule to MP_QSTR_module everywhere. 2023-06-08 17:53:57 +10:00
rp2_flash.c rp2/rp2_flash: Call MICROPY_EVENT_POLL_HOOK_FAST after reading flash. 2023-01-12 16:53:02 +11:00
rp2_pio.c rp2: Make rp2_state_machine_exec accept integers. 2023-05-18 12:33:02 +10:00
uart.c all: Rename mp_keyboard_interrupt to mp_sched_keyboard_interrupt. 2021-04-30 15:13:43 +10:00
uart.h rp2: Add new port to Raspberry Pi RP2 microcontroller. 2021-01-30 00:42:29 +11:00
usbd.c shared/tinyusb: Allow max USB descriptor string to be configured. 2023-04-04 11:57:25 +10:00

The RP2 port

This is a port of MicroPython to the Raspberry Pi RP2 series of microcontrollers. Currently supported features are:

  • REPL over USB VCP, and optionally over UART (on GP0/GP1).
  • Filesystem on the internal flash, using littlefs2.
  • Support for native code generation and inline assembler.
  • time module with sleep, time and ticks functions.
  • os module with VFS support.
  • machine module with the following classes: Pin, ADC, PWM, I2C, SPI, SoftI2C, SoftSPI, Timer, UART, WDT.
  • rp2 module with programmable IO (PIO) support.

See the examples/rp2/ directory for some example code.

Building

The MicroPython cross-compiler must be built first, which will be used to pre-compile (freeze) built-in Python code. This cross-compiler is built and run on the host machine using:

$ make -C mpy-cross

This command should be executed from the root directory of this repository. All other commands below should be executed from the ports/rp2/ directory.

Building of the RP2 firmware is done entirely using CMake, although a simple Makefile is also provided as a convenience. To build the firmware run (from this directory):

$ make submodules
$ make clean
$ make

You can also build the standard CMake way. The final firmware is found in the top-level of the CMake build directory (build by default) and is called firmware.uf2.

If you are using a different board other than a Rasoberry Pi Pico, then you should pass the board name to the build; e.g. for Raspberry Pi Pico W:

$ make BOARD=PICO_W submodules
$ make BOARD=PICO_W clean
$ make BOARD=PICO_W

Deploying firmware to the device

Firmware can be deployed to the device by putting it into bootloader mode (hold down BOOTSEL while powering on or resetting) and then copying firmware.uf2 to the USB mass storage device that appears.

If MicroPython is already installed then the bootloader can be entered by executing import machine; machine.bootloader() at the REPL.

Sample code

The following samples can be easily run on the board by entering paste mode with Ctrl-E at the REPL, then cut-and-pasting the sample code to the REPL, then executing the code with Ctrl-D.

Blinky

This blinks the on-board LED on the Pico board at 1.25Hz, using a Timer object with a callback.

from machine import Pin, Timer
led = Pin(25, Pin.OUT)
tim = Timer()
def tick(timer):
    global led
    led.toggle()

tim.init(freq=2.5, mode=Timer.PERIODIC, callback=tick)

PIO blinky

This blinks the on-board LED on the Pico board at 1Hz, using a PIO peripheral and PIO assembler to directly toggle the LED at the required rate.

from machine import Pin
import rp2

@rp2.asm_pio(set_init=rp2.PIO.OUT_LOW)
def blink_1hz():
    # Turn on the LED and delay, taking 1000 cycles.
    set(pins, 1)
    set(x, 31)                  [6]
    label("delay_high")
    nop()                       [29]
    jmp(x_dec, "delay_high")

    # Turn off the LED and delay, taking 1000 cycles.
    set(pins, 0)
    set(x, 31)                  [6]
    label("delay_low")
    nop()                       [29]
    jmp(x_dec, "delay_low")

# Create StateMachine(0) with the blink_1hz program, outputting on Pin(25).
sm = rp2.StateMachine(0, blink_1hz, freq=2000, set_base=Pin(25))
sm.active(1)

See the examples/rp2/ directory for further example code.