stm32: Integrate in the cyw43 driver and network.WLAN class.

Enable it by setting MICROPY_PY_NETWORK_CYW43=1 at the Makefile level.

ports/stm32/Makefile

@@ -116,6 +116,7 @@ SRC_LIB = $(addprefix lib/,\
 	mp-readline/readline.c \
 	netutils/netutils.c \
 	netutils/trace.c \
+	netutils/dhcpserver.c \
 	timeutils/timeutils.c \
 	utils/pyexec.c \
 	utils/interrupt_char.c \
@@ -351,6 +352,14 @@ SRC_USBDEV = $(addprefix $(USBDEV_DIR)/,\
 	class/src/usbd_msc_data.c \
 	)
 
+ifeq ($(MICROPY_PY_NETWORK_CYW43),1)
+CFLAGS_MOD += -DMICROPY_PY_NETWORK_CYW43=1
+SRC_C += sdio.c
+EXTMOD_SRC_C += extmod/network_cyw43.c
+DRIVERS_SRC_C += drivers/cyw43/cyw43_ctrl.c drivers/cyw43/cyw43_lwip.c
+LIBS += $(TOP)/drivers/cyw43/libcyw43.a
+endif
+
 ifneq ($(MICROPY_PY_WIZNET5K),0)
 WIZNET5K_DIR=drivers/wiznet5k
 INC += -I$(TOP)/$(WIZNET5K_DIR)

ports/stm32/extint.c

@@ -31,6 +31,7 @@
 #include "py/runtime.h"
 #include "py/gc.h"
 #include "py/mphal.h"
+#include "pendsv.h"
 #include "pin.h"
 #include "extint.h"
 #include "irq.h"
@@ -613,6 +614,15 @@ void Handle_EXTI_Irq(uint32_t line) {
         __HAL_GPIO_EXTI_CLEAR_FLAG(1 << line);
         if (line < EXTI_NUM_VECTORS) {
             mp_obj_t *cb = &MP_STATE_PORT(pyb_extint_callback)[line];
+            #if MICROPY_PY_NETWORK_CYW43 && defined(pyb_pin_WL_HOST_WAKE)
+            if (pyb_extint_callback_arg[line] == MP_OBJ_FROM_PTR(pyb_pin_WL_HOST_WAKE)) {
+                extern void (*cyw43_poll)(void);
+                if (cyw43_poll) {
+                    pendsv_schedule_dispatch(PENDSV_DISPATCH_CYW43, cyw43_poll);
+                }
+                return;
+            }
+            #endif
             if (*cb != mp_const_none) {
                 // If it's a soft IRQ handler then just schedule callback for later
                 if (!pyb_extint_hard_irq[line]) {

ports/stm32/main.c

@@ -39,6 +39,7 @@
 
 #if MICROPY_PY_LWIP
 #include "lwip/init.h"
+#include "drivers/cyw43/cyw43.h"
 #endif
 
 #include "systick.h"
@@ -481,6 +482,17 @@ void stm32_main(uint32_t reset_mode) {
     systick_enable_dispatch(SYSTICK_DISPATCH_LWIP, mod_network_lwip_poll_wrapper);
     #endif
 
+    #if MICROPY_PY_NETWORK_CYW43
+    {
+        cyw43_init(&cyw43_state);
+        uint8_t buf[8];
+        memcpy(&buf[0], "PYBD", 4);
+        mp_hal_get_mac_ascii(MP_HAL_MAC_WLAN0, 8, 4, (char*)&buf[4]);
+        cyw43_wifi_ap_set_ssid(&cyw43_state, 8, buf);
+        cyw43_wifi_ap_set_password(&cyw43_state, 8, (const uint8_t*)"pybd0123");
+    }
+    #endif
+
     #if defined(MICROPY_HW_UART_REPL)
     // Set up a UART REPL using a statically allocated object
     pyb_uart_repl_obj.base.type = &pyb_uart_type;

ports/stm32/modnetwork.c

@@ -44,6 +44,8 @@
 #include "lwip/timeouts.h"
 #include "lwip/dns.h"
 #include "lwip/dhcp.h"
+#include "extmod/network_cyw43.h"
+#include "drivers/cyw43/cyw43.h"
 
 // Poll lwIP every 128ms
 #define LWIP_TICK(tick) (((tick) & ~(SYSTICK_DISPATCH_NUM_SLOTS - 1) & 0x7f) == 0)
@@ -70,6 +72,16 @@ void mod_network_lwip_poll_wrapper(uint32_t ticks_ms) {
     if (LWIP_TICK(ticks_ms)) {
         pendsv_schedule_dispatch(PENDSV_DISPATCH_LWIP, pyb_lwip_poll);
     }
+
+    #if MICROPY_PY_NETWORK_CYW43
+    if (cyw43_poll) {
+        if (cyw43_sleep != 0) {
+            if (--cyw43_sleep == 0) {
+                pendsv_schedule_dispatch(PENDSV_DISPATCH_CYW43, cyw43_poll);
+            }
+        }
+    }
+    #endif
 }
 
 #endif
@@ -119,6 +131,9 @@ STATIC const mp_rom_map_elem_t mp_module_network_globals_table[] = {
     #if defined(MICROPY_HW_ETH_MDC)
     { MP_ROM_QSTR(MP_QSTR_LAN), MP_ROM_PTR(&network_lan_type) },
     #endif
+    #if MICROPY_PY_NETWORK_CYW43
+    { MP_ROM_QSTR(MP_QSTR_WLAN), MP_ROM_PTR(&mp_network_cyw43_type) },
+    #endif
 
     #if MICROPY_PY_WIZNET5K
     { MP_ROM_QSTR(MP_QSTR_WIZNET5K), MP_ROM_PTR(&mod_network_nic_type_wiznet5k) },
@@ -128,6 +143,12 @@ STATIC const mp_rom_map_elem_t mp_module_network_globals_table[] = {
     #endif
 
     { MP_ROM_QSTR(MP_QSTR_route), MP_ROM_PTR(&network_route_obj) },
+
+    // Constants
+    #if MICROPY_PY_NETWORK_CYW43
+    { MP_ROM_QSTR(MP_QSTR_STA_IF), MP_ROM_INT(CYW43_ITF_STA)},
+    { MP_ROM_QSTR(MP_QSTR_AP_IF), MP_ROM_INT(CYW43_ITF_AP)},
+    #endif
 };
 
 STATIC MP_DEFINE_CONST_DICT(mp_module_network_globals, mp_module_network_globals_table);

ports/stm32/pendsv.h

@@ -29,6 +29,9 @@
 enum {
     #if MICROPY_PY_NETWORK && MICROPY_PY_LWIP
     PENDSV_DISPATCH_LWIP,
+    #if MICROPY_PY_NETWORK_CYW43
+    PENDSV_DISPATCH_CYW43,
+    #endif
     #endif
     PENDSV_DISPATCH_MAX
 };