Use the function to set the IP address (#459)

* Use the function to set the IP address

* Simplify character detection

The code should be able to handle reading a character in the IRQ now.

pico_w/wifi/access_point/CMakeLists.txt

@@ -15,7 +15,10 @@ target_link_libraries(picow_access_point_background
         pico_cyw43_arch_lwip_threadsafe_background
         pico_stdlib
         )
-
+# You can change the address below to change the address of the access point
+pico_configure_ip4_address(picow_access_point_background PRIVATE
+        CYW43_DEFAULT_IP_AP_ADDRESS 192.168.4.1
+        )
 pico_add_extra_outputs(picow_access_point_background)
 
 add_executable(picow_access_point_poll
@@ -33,4 +36,8 @@ target_link_libraries(picow_access_point_poll
         pico_cyw43_arch_lwip_poll
         pico_stdlib
         )
+# You can change the address below to change the address of the access point
+pico_configure_ip4_address(picow_access_point_poll PRIVATE
+        CYW43_DEFAULT_IP_AP_ADDRESS 192.168.4.1
+        )
 pico_add_extra_outputs(picow_access_point_poll)

pico_w/wifi/access_point/picow_access_point.c

@@ -30,7 +30,6 @@ typedef struct TCP_SERVER_T_ {
     struct tcp_pcb *server_pcb;
     bool complete;
     ip_addr_t gw;
-    async_context_t *context;
 } TCP_SERVER_T;
 
 typedef struct TCP_CONNECT_STATE_T_ {
@@ -269,24 +268,15 @@ static bool tcp_server_open(void *arg, const char *ap_name) {
     return true;
 }
 
-// This "worker" function is called to safely perform work when instructed by key_pressed_func
-void key_pressed_worker_func(async_context_t *context, async_when_pending_worker_t *worker) {
-    assert(worker->user_data);
-    printf("Disabling wifi\n");
-    cyw43_arch_disable_ap_mode();
-    ((TCP_SERVER_T*)(worker->user_data))->complete = true;
-}
-
-static async_when_pending_worker_t key_pressed_worker = {
-        .do_work = key_pressed_worker_func
-};
-
 void key_pressed_func(void *param) {
     assert(param);
+    TCP_SERVER_T *state = (TCP_SERVER_T*)param;
     int key = getchar_timeout_us(0); // get any pending key press but don't wait
     if (key == 'd' || key == 'D') {
-        // We are probably in irq context so call wifi in a "worker"
-        async_context_set_work_pending(((TCP_SERVER_T*)param)->context, &key_pressed_worker);
+        cyw43_arch_lwip_begin();
+        cyw43_arch_disable_ap_mode();
+        cyw43_arch_lwip_end();
+        state->complete = true;
     }
 }
 
@@ -305,9 +295,6 @@ int main() {
     }
 
     // Get notified if the user presses a key
-    state->context = cyw43_arch_async_context();
-    key_pressed_worker.user_data = state;
-    async_context_add_when_pending_worker(cyw43_arch_async_context(), &key_pressed_worker);
     stdio_set_chars_available_callback(key_pressed_func, state);
 
     const char *ap_name = "picow_test";
@@ -358,5 +345,6 @@ int main() {
     dns_server_deinit(&dns_server);
     dhcp_server_deinit(&dhcp_server);
     cyw43_arch_deinit();
+    printf("Test complete\n");
     return 0;
 }