Add Pico-w AP channel configuration support

Adds support to the rp2040 network driver for configuring the channel used in AP mode.

Signed-off-by: Winford <winford@object.stream>

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 - ESP32 support for setting the network channel used in AP mode.
+- Pico-W support for setting the network channel used in AP mode.
 
 ### Fixed
 

src/platforms/rp2040/src/lib/networkdriver.c

@@ -41,6 +41,7 @@
 #define PORT_REPLY_SIZE (TUPLE_SIZE(2) + REF_SIZE)
 
 static const char *const ap_atom = ATOM_STR("\x2", "ap");
+static const char *const ap_channel_atom = ATOM_STR("\xA", "ap_channel");
 static const char *const ap_sta_connected_atom = ATOM_STR("\x10", "ap_sta_connected");
 static const char *const ap_sta_disconnected_atom = ATOM_STR("\x13", "ap_sta_disconnected");
 static const char *const ap_started_atom = ATOM_STR("\xA", "ap_started");
@@ -382,6 +383,7 @@ static term start_ap(term ap_config, GlobalContext *global)
 {
     term ssid_term = interop_kv_get_value(ap_config, ssid_atom, global);
     term pass_term = interop_kv_get_value(ap_config, psk_atom, global);
+    term channel_term = interop_kv_get_value(ap_config, ap_channel_atom, global);
 
     //
     // Check parameters
@@ -409,9 +411,16 @@ static term start_ap(term ap_config, GlobalContext *global)
             return BADARG_ATOM;
         }
     }
+    uint32_t channel = 0;
+    if (!term_is_invalid_term(channel_term)) {
+        channel = term_to_int32(channel_term);
+    }
 
     uint32_t auth = (psk == NULL) ? CYW43_AUTH_OPEN : CYW43_AUTH_WPA2_AES_PSK;
     cyw43_state.assoc_cb = network_driver_cyw43_assoc_cb;
+    if (channel != 0) {
+        cyw43_wifi_ap_set_channel(&cyw43_state, channel);
+    }
     cyw43_arch_enable_ap_mode(ssid, psk, auth);
     send_ap_started(global);
     free(ssid);