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extmod/network_ppp_lwip: Add network.PPP via lwIP.

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This commit adds a new `network.PPP` interface which works on any port that
has bare-metal lwIP, eg rp2, stm32, mimxrt.

It has been tested on stm32.  A board needs to enable
`MICROPY_PY_NETWORK_PPP_LWIP` and then it can use it as follows:

    import network

    ppp = network.PPP(uart)
    ppp.connect()

    while not ppp.isconnected():
        pass

    # use `socket` module as usual, etc

    ppp.disconnect()

Usually the application must first configure the cellular/etc UART link to
get it connected and in to PPP mode first (eg ATD*99#), before handing over
control to `network.PPP`.

The PPP interface automatically configures the UART IRQ callback to call
PPP.poll() on incoming data.

Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Damien George
2024-03-13 17:09:51 +11:00
parent 664dd7b54a
commit bc952d37fe
5 changed files with 388 additions and 0 deletions
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4
extmod/modnetwork.c
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@@ -156,6 +156,10 @@ static const mp_rom_map_elem_t mp_module_network_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR_ipconfig), MP_ROM_PTR(&mod_network_ipconfig_obj) },
#endif
#if MICROPY_PY_NETWORK_PPP_LWIP
{ MP_ROM_QSTR(MP_QSTR_PPP), MP_ROM_PTR(&mp_network_ppp_lwip_type) },
#endif
// Defined per port in mpconfigport.h
#ifdef MICROPY_PORT_NETWORK_INTERFACES
{ MP_ROM_QSTR(MP_QSTR_route), MP_ROM_PTR(&network_route_obj) },