Experimental: PINT module bindings.

P.I.N.T

Python Implementation of Network Transports.

Author: Gadgetoid

.github/workflows/micropython.yml

@@ -23,6 +23,8 @@ jobs:
           board: RPI_PICO_USB
         - name: picow
           board: RPI_PICO_W
+        - name: pico_pint
+          board: RPI_PICO_PINT
         - name: tiny2040_8mb
           board: PIMORONI_TINY2040
         - name: picolipo_4mb

micropython/board/RPI_PICO_PINT/board.json

@@ -0,0 +1,20 @@
+{
+    "deploy": [
+        "../deploy.md"
+    ],
+    "docs": "",
+    "features": [
+        "Breadboard friendly",
+        "Castellated Pads",
+        "Micro USB"
+    ],
+    "id": "rp2-pico",
+    "images": [
+        "rp2-pico.jpg"
+    ],
+    "mcu": "rp2040",
+    "product": "Pico",
+    "thumbnail": "",
+    "url": "https://www.raspberrypi.com/products/raspberry-pi-pico/",
+    "vendor": "Raspberry Pi"
+}

micropython/board/RPI_PICO_PINT/manifest.py

@@ -0,0 +1,5 @@
+include("$(PORT_DIR)/boards/manifest.py")
+
+require("bundle-networking")
+
+include("../manifest_pico.py")

micropython/board/RPI_PICO_PINT/mpconfigboard.cmake

@@ -0,0 +1,7 @@
+# cmake file for Raspberry Pi Pico
+set(PICO_BOARD "pico")
+
+# Board specific version of the frozen manifest
+set(MICROPY_FROZEN_MANIFEST ${MICROPY_BOARD_DIR}/manifest.py)
+
+set(MICROPY_C_HEAP_SIZE 4096)

micropython/board/RPI_PICO_PINT/mpconfigboard.h

@@ -0,0 +1,15 @@
+// Board and hardware specific configuration
+#define MICROPY_HW_BOARD_NAME                   "Raspberry Pi Pico"
+#define MICROPY_HW_FLASH_STORAGE_BYTES          (1408 * 1024)
+
+// Enable networking.
+#define MICROPY_PY_NETWORK                      1
+#define MICROPY_PY_NETWORK_HOSTNAME_DEFAULT     "Pico"
+
+extern const struct _mp_obj_type_t mod_network_nic_type_pint;
+#define MICROPY_HW_NIC_PINT                      { MP_ROM_QSTR(MP_QSTR_PINT), MP_ROM_PTR(&mod_network_nic_type_pint) },
+
+#define MICROPY_BOARD_NETWORK_INTERFACES \
+    MICROPY_HW_NIC_PINT
+
+#define MICROPY_PY_SOCKET_EXTENDED_STATE        1

micropython/board/RPI_PICO_PINT/pins.csv

@@ -0,0 +1,28 @@
+GP0,GPIO0
+GP1,GPIO1
+GP2,GPIO2
+GP3,GPIO3
+GP4,GPIO4
+GP5,GPIO5
+GP6,GPIO6
+GP7,GPIO7
+GP8,GPIO8
+GP9,GPIO9
+GP10,GPIO10
+GP11,GPIO11
+GP12,GPIO12
+GP13,GPIO13
+GP14,GPIO14
+GP15,GPIO15
+GP16,GPIO16
+GP17,GPIO17
+GP18,GPIO18
+GP19,GPIO19
+GP20,GPIO20
+GP21,GPIO21
+GP22,GPIO22
+GP25,GPIO25
+GP26,GPIO26
+GP27,GPIO27
+GP28,GPIO28
+LED,GPIO25

micropython/modules/micropython-pico_pint.cmake

@@ -0,0 +1,14 @@
+include_directories(${CMAKE_CURRENT_LIST_DIR}/../../)
+
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}")
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/../")
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/../../")
+
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_CXX_STANDARD 17)
+
+include(micropython-common)
+include(pint/micropython)
+
+# C++ Magic Memory
+include(cppmem/micropython)

micropython/modules/pint/README.md

@@ -0,0 +1,82 @@
+# P.I.N.T
+
+### Python Implementation of Network Transports.
+
+Want to glue your esoteric network device into MicroPython without delving
+into C or trying to figure out lwIP? PINT is just the refreshment you need.
+
+### Reference Implementation
+
+PINT uses a Python class to implement a socket-based networking driver.
+
+How you implement these functions is down to you- but you must expect/return
+the correct data. Here's the basic skeleton:
+
+```python
+class PINT_Socket():
+    """An arbitrary structure for storing data about your sockets.
+
+    Does not have to be a class, you could just return an int with the
+    socket ID of your target device.
+    """
+    def __init__(self):
+        pass
+
+
+class PINT_NIC:
+    """The actual NIC implementation.
+
+    Most of the heavy lifting is sockets based, you might want to implement
+    the socket_ methods on your socket class and simply delegate to them.
+    """
+    def __init__(self) -> None:
+        pass
+
+    def __del__(self) -> None:
+        pass
+
+    def gethostbyname(self, name: str) -> tuple[int, int, int, int]:
+        return (127, 0, 0, 1)
+
+    def socket_socket(self) -> PINT_Socket:
+        return PINT_Socket()
+
+    def socket_close(self, socket: PINT_Socket) -> None:
+        pass
+
+    def socket_bind(self, socket: PINT_Socket, ip: tuple[int, int, int, int], port: int) -> bool:
+        return True
+
+    def socket_listen(self, socket: PINT_Socket, backlog: int) -> bool:
+        return True
+
+    def socket_accept(self, socket: PINT_Socket, socket2: PINT_Socket, ip: tuple[int, int, int, int], port: int) -> bool:
+        return True
+
+    def socket_connect(self, socket: PINT_Socket, ip: tuple[int, int, int, int], port) -> bool:
+        return True
+
+    def socket_send(self, socket: PINT_Socket, buf: bytearray) -> int:
+        return 0
+
+    def socket_recv(self, socket: PINT_Socket, buf: bytearray) -> int:
+        """Buf is provided as a mutable bytearray, you must write into it."""
+        return 0
+
+    def socket_sendto(self, socket: PINT_Socket, buf: bytearray, ip, port) -> int:
+        return 0
+
+    def socket_recvfrom(self, socket: PINT_Socket, buf: bytearray, ip, port) -> int:
+        """Buf is provided as a mutable bytearray, you must write into it."""
+        return 0
+
+    def socket_setsockopt(self, socket: PINT_Socket, level: int, opt: int, val: bytearray) -> bool:
+        return True
+
+    def socket_settimeout(self, socket: PINT_Socket, timeout_ms: int) -> bool:
+        return True
+
+    def socket_ioctl(self, socket: PINT_Socket, request: int, arg: int) -> bool:
+        return True
+
+```

micropython/modules/pint/micropython.cmake

@@ -0,0 +1,18 @@
+set(MOD_NAME pint)
+string(TOUPPER ${MOD_NAME} MOD_NAME_UPPER)
+add_library(usermod_${MOD_NAME} INTERFACE)
+
+target_sources(usermod_${MOD_NAME} INTERFACE
+    ${CMAKE_CURRENT_LIST_DIR}/${MOD_NAME}.c
+    ${CMAKE_CURRENT_LIST_DIR}/${MOD_NAME}.cpp
+)
+
+target_include_directories(usermod_${MOD_NAME} INTERFACE
+    ${CMAKE_CURRENT_LIST_DIR}
+)
+
+target_compile_definitions(usermod_${MOD_NAME} INTERFACE
+    MODULE_PINT_ENABLED=1
+)
+
+target_link_libraries(usermod INTERFACE usermod_${MOD_NAME})

micropython/modules/pint/pint.c

@@ -0,0 +1,52 @@
+#include "pint.h"
+
+MP_DEFINE_CONST_FUN_OBJ_1(network_pint__del__obj, network_pint__del__);
+
+static const mod_network_nic_protocol_t mod_network_nic_protocol_pint = {
+    .gethostbyname = network_pint_gethostbyname,
+    .deinit = network_pint_deinit,
+    .socket = network_pint_socket_socket,
+    .close = network_pint_socket_close,
+    .bind = network_pint_socket_bind,
+    .listen = network_pint_socket_listen,
+    .accept = network_pint_socket_accept,
+    .connect = network_pint_socket_connect,
+    .send = network_pint_socket_send,
+    .recv = network_pint_socket_recv,
+    .sendto = network_pint_socket_sendto,
+    .recvfrom = network_pint_socket_recvfrom,
+    .setsockopt = network_pint_socket_setsockopt,
+    .settimeout = network_pint_socket_settimeout,
+    .ioctl = network_pint_socket_ioctl,
+};
+
+static const mp_rom_map_elem_t pint_locals_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&network_pint__del__obj) },
+};
+
+static MP_DEFINE_CONST_DICT(pint_locals_dict, pint_locals_dict_table);
+
+MP_DEFINE_CONST_OBJ_TYPE(
+    mod_network_nic_type_pint,
+    MP_QSTR_pint,
+    MP_TYPE_FLAG_NONE,
+    make_new, network_pint_make_new,
+    locals_dict, &pint_locals_dict,
+    protocol, &mod_network_nic_protocol_pint
+);
+
+#ifdef NETWORK_PINT_MODULE
+static const mp_map_elem_t pint_globals_table[] = {
+    { MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_pint) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_PINT), (mp_obj_t)&mod_network_nic_type_pint },
+};
+
+static MP_DEFINE_CONST_DICT(mp_module_pint_globals, pint_globals_table);
+
+const mp_obj_module_t pint_user_cmodule = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t*)&mp_module_pint_globals,
+};
+
+MP_REGISTER_MODULE(MP_QSTR_pint, pint_user_cmodule);
+#endif