Add Pico-W driver in src/drivedrivers

src/drivers/pico-w.c

@@ -0,0 +1,61 @@
+#if MG_ENABLE_TCPIP && MG_ARCH == MG_ARCH_PICOSDK && \
+    defined(MG_ENABLE_DRIVER_PICO_W) && MG_ENABLE_DRIVER_PICO_W
+
+#include "net_builtin.h"
+#include "drivers/pico-w.h"
+#include "pico/stdlib.h"
+
+static struct mg_tcpip_if *s_ifp;
+
+static bool mg_tcpip_driver_pico_w_init(struct mg_tcpip_if *ifp) {
+  struct mg_tcpip_driver_pico_w_data *d =
+      (struct mg_tcpip_driver_pico_w_data *) ifp->driver_data;
+  s_ifp = ifp;
+  if (cyw43_arch_init() != 0)
+    return false;  // initialize async_context and WiFi chip
+  cyw43_arch_enable_sta_mode();
+  // start connecting to network
+  if (cyw43_arch_wifi_connect_bssid_async(d->ssid, NULL, d->pass,
+                                          CYW43_AUTH_WPA2_AES_PSK) != 0)
+    return false;
+  cyw43_wifi_get_mac(&cyw43_state, CYW43_ITF_STA, ifp->mac);
+  return true;
+}
+
+static size_t mg_tcpip_driver_pico_w_tx(const void *buf, size_t len,
+                                        struct mg_tcpip_if *ifp) {
+  (void) ifp;
+  return cyw43_send_ethernet(&cyw43_state, CYW43_ITF_STA, len, buf, false)
+             ? 0
+             : len;
+}
+
+static bool mg_tcpip_driver_pico_w_up(struct mg_tcpip_if *ifp) {
+  (void) ifp;
+  return (cyw43_wifi_link_status(&cyw43_state, CYW43_ITF_STA) ==
+          CYW43_LINK_JOIN);
+}
+
+struct mg_tcpip_driver mg_tcpip_driver_pico_w = {
+    mg_tcpip_driver_pico_w_init,
+    mg_tcpip_driver_pico_w_tx,
+    NULL,
+    mg_tcpip_driver_pico_w_up,
+};
+
+// Called once per outstanding frame by async_context
+void cyw43_cb_process_ethernet(void *cb_data, int itf, size_t len,
+                               const uint8_t *buf) {
+  if (itf != CYW43_ITF_STA) return;
+  mg_tcpip_qwrite((void *) buf, len, s_ifp);
+  (void) cb_data;
+}
+
+// Called by async_context
+void cyw43_cb_tcpip_set_link_up(cyw43_t *self, int itf) {}
+void cyw43_cb_tcpip_set_link_down(cyw43_t *self, int itf) {}
+
+// there's life beyond lwIP
+void pbuf_copy_partial(void) {(void) 0;}
+
+#endif

src/drivers/pico-w.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#if MG_ENABLE_TCPIP && MG_ARCH == MG_ARCH_PICOSDK && \
+    defined(MG_ENABLE_DRIVER_PICO_W) && MG_ENABLE_DRIVER_PICO_W
+
+#include "cyw43.h"              // keep this include
+#include "pico/cyw43_arch.h"    // keep this include
+#include "pico/unique_id.h"     // keep this include
+
+struct mg_tcpip_driver_pico_w_data {
+  char *ssid;
+  char *pass;
+};
+
+#endif

src/net_builtin.h

@@ -82,6 +82,7 @@ extern struct mg_tcpip_driver mg_tcpip_driver_ra;
 extern struct mg_tcpip_driver mg_tcpip_driver_xmc;
 extern struct mg_tcpip_driver mg_tcpip_driver_xmc7;
 extern struct mg_tcpip_driver mg_tcpip_driver_ppp;
+extern struct mg_tcpip_driver mg_tcpip_driver_pico_w;
 
 // Drivers that require SPI, can use this SPI abstraction
 struct mg_tcpip_spi {