fix wifi & flash + eink screen on core 1, by using queue

epaper_manager.cpp

@@ -2,6 +2,8 @@
 #include "wifi_manager.h"
 #include "pico/stdlib.h"
 #include "pico/multicore.h"
+#include "pico/flash.h"
+#include "pico/util/queue.h"
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
@@ -31,6 +33,10 @@ static bool g_force_full_refresh = false;  // Flag to force full refresh when li
 // Synchronization flag for multicore initialization
 static volatile bool g_display_ready = false;
 
+// Queue for display messages (replacing raw FIFO to avoid conflict with flash_safe_execute)
+static queue_t g_display_queue;
+#define QUEUE_LENGTH 8
+
 // Display update message structure for inter-core communication
 typedef struct {
     EntryList entries;
@@ -84,9 +90,18 @@ static void init_epaper_display() {
     EPD_7IN5B_V2_Display_Partial(g_epd_image, 0, 0, EPD_7IN5B_V2_WIDTH, EPD_7IN5B_V2_HEIGHT);
     EPD_7IN5B_V2_Display_Partial(g_epd_image, 0, 0, EPD_7IN5B_V2_WIDTH, EPD_7IN5B_V2_HEIGHT);
 
+    printf("Trying to connect to wifi\r\n");
+    bool connected = wifi_try_auto_connect();
+    
+
     Paint_SelectImage(g_epd_red);
     printf("Drawing header\r\n");
-    Paint_DrawString_EN(10, 10, "What's new today:", &Font24, WHITE, RED);
+    if (connected) {
+        Paint_DrawString_EN(10, 10, "What's new today: ...", &Font24, WHITE, RED);
+    } else {
+        Paint_DrawString_EN(10, 10, "What's new today:", &Font24, WHITE, RED);
+    }
+    
     
     // Display the image with both black and red buffers
     EPD_7IN5B_V2_Display_Partial(g_epd_red, 0, 0, EPD_7IN5B_V2_WIDTH, EPD_7IN5B_V2_HEIGHT);
@@ -98,6 +113,9 @@ static void init_epaper_display() {
  * Core 1 function: Runs display initialization and update handling
  */
 static void core1_display_init() {
+    // Initialize flash safe execute support for this core
+    flash_safe_execute_core_init();
+
     // Initialize WiFi on Core 1 so IRQs are handled here
     wifi_init();
 
@@ -109,20 +127,18 @@ static void core1_display_init() {
     // Initialize for partial refresh on second call
     EPD_7IN5B_V2_Init_Part();
     
-    // Core 1 main loop: handle display updates via FIFO
+    // Core 1 main loop: handle display updates via Queue
     while (true) {
-        // Check if there's a message from core 0
-        if (multicore_fifo_rvalid()) {
-            // Read the message pointer
-            uint32_t msg_addr = multicore_fifo_pop_blocking();
-            DisplayMessage *msg = (DisplayMessage *)msg_addr;
-
-            // Drain FIFO to get the latest message
-            while (multicore_fifo_rvalid()) {
+        DisplayMessage *msg;
+        // Check if there's a message in the queue
+        if (queue_try_remove(&g_display_queue, &msg)) {
+            
+            // Drain Queue to get the latest message
+            DisplayMessage *next_msg;
+            while (queue_try_remove(&g_display_queue, &next_msg)) {
                  printf("[Core 1] Skipping intermediate update\n");
                  free(msg); // Free the stale message
-                 msg_addr = multicore_fifo_pop_blocking();
-                 msg = (DisplayMessage *)msg_addr;
+                 msg = next_msg;
             }
             
             printf("[Core 1] Updating display with %d entries\n", msg->entries.count);
@@ -173,12 +189,16 @@ static void core1_display_init() {
 }
 
 void epaper_start_background_thread() {
+    // Initialize the queue before starting the thread
+    queue_init(&g_display_queue, sizeof(DisplayMessage*), QUEUE_LENGTH);
+
     printf("Launching e-Paper display init on core 1...\n");
     multicore_launch_core1(core1_display_init);
 }
 
 void epaper_send_update(const char *entry, bool finish_line) {
     if (!g_display_ready) return;  // Don't send if display isn't ready
+    // printf("[Core 0] Preparing display update: '%s' (finish_line=%d)\n", entry, finish_line);
     
     // Check if list is at capacity
     if (g_entry_list.count >= MAX_ENTRIES) {
@@ -224,11 +244,11 @@ void epaper_send_update(const char *entry, bool finish_line) {
         msg->yend = msg->ystart + 25;
     }
     
-    // Send message pointer to core 1 if FIFO has space
-    if (multicore_fifo_wready()) {
-        multicore_fifo_push_blocking((uint32_t)msg);
+    // Send message pointer to core 1 via Queue
+    if (queue_try_add(&g_display_queue, &msg)) {
+        // printf("[Core 0] Display update sent to core 1\n");
     } else {
-        printf("[Core 0] FIFO full, skipping display update\n");
+        printf("[Core 0] Queue full, skipping display update\n");
         free(msg);
     }