#include #include #include #include #include #include #include #include #include #include #include #include "driver/uart.h" #include "hardware.h" #include "managed_i2c.h" #include "pax_gfx.h" #include "sdcard.h" #include "appfs.h" #include "driver_framebuffer.h" #include "rp2040.h" #include "rp2040bl.h" #include "rp2040firmware.h" #include "fpga_test.h" #include "menu.h" #include "system_wrapper.h" #include "graphics_wrapper.h" #include "appfs_wrapper.h" #include "settings.h" #include "wifi_connection.h" #include "ws2812.h" #include "esp32/rom/crc.h" static const char *TAG = "main"; typedef enum action { ACTION_NONE, ACTION_APPFS, ACTION_INSTALLER, ACTION_SETTINGS, ACTION_OTA, ACTION_FPGA, ACTION_RP2040_BL, ACTION_WIFI_CONNECT, ACTION_WIFI_SCAN, ACTION_WIFI_MANUAL, ACTION_WIFI_LIST, ACTION_BACK } menu_action_t; typedef struct _menu_args { appfs_handle_t fd; menu_action_t action; } menu_args_t; void appfs_store_app(pax_buf_t* pax_buffer, ILI9341* ili9341, uint8_t* framebuffer) { graphics_task(pax_buffer, ili9341, framebuffer, NULL, "Installing app..."); esp_err_t res; appfs_handle_t handle; FILE* app_fd = fopen("/sd/gnuboy.bin", "rb"); if (app_fd == NULL) { graphics_task(pax_buffer, ili9341, framebuffer, NULL, "Failed to open gnuboy.bin"); ESP_LOGE(TAG, "Failed to open gnuboy.bin"); vTaskDelay(100 / portTICK_PERIOD_MS); return; } size_t app_size; uint8_t* app = load_file_to_ram(app_fd, &app_size); if (app == NULL) { graphics_task(pax_buffer, ili9341, framebuffer, NULL, "Failed to load app to RAM"); ESP_LOGE(TAG, "Failed to load application into RAM"); vTaskDelay(100 / portTICK_PERIOD_MS); return; } ESP_LOGI(TAG, "Application size %d", app_size); res = appfsCreateFile("gnuboy", app_size, &handle); if (res != ESP_OK) { graphics_task(pax_buffer, ili9341, framebuffer, NULL, "Failed to create on AppFS"); ESP_LOGE(TAG, "Failed to create file on AppFS (%d)", res); vTaskDelay(100 / portTICK_PERIOD_MS); free(app); return; } res = appfsWrite(handle, 0, app, app_size); if (res != ESP_OK) { graphics_task(pax_buffer, ili9341, framebuffer, NULL, "Failed to write to AppFS"); ESP_LOGE(TAG, "Failed to write to file on AppFS (%d)", res); vTaskDelay(100 / portTICK_PERIOD_MS); free(app); return; } free(app); ESP_LOGI(TAG, "Application is now stored in AppFS"); graphics_task(pax_buffer, ili9341, framebuffer, NULL, "App installed!"); vTaskDelay(100 / portTICK_PERIOD_MS); return; } void menu_launcher(xQueueHandle buttonQueue, pax_buf_t* pax_buffer, ILI9341* ili9341, uint8_t* framebuffer, menu_action_t* menu_action, appfs_handle_t* appfs_fd) { menu_t* menu = menu_alloc("Main menu"); *appfs_fd = APPFS_INVALID_FD; *menu_action = ACTION_NONE; while (1) { *appfs_fd = appfsNextEntry(*appfs_fd); if (*appfs_fd == APPFS_INVALID_FD) break; const char* name = NULL; appfsEntryInfo(*appfs_fd, &name, NULL); menu_args_t* args = malloc(sizeof(menu_args_t)); args->fd = *appfs_fd; args->action = ACTION_APPFS; menu_insert_item(menu, name, NULL, (void*) args, -1); } *appfs_fd = APPFS_INVALID_FD; menu_args_t* install_args = malloc(sizeof(menu_args_t)); install_args->action = ACTION_INSTALLER; menu_insert_item(menu, "Hatchery", NULL, install_args, -1); menu_args_t* settings_args = malloc(sizeof(menu_args_t)); settings_args->action = ACTION_SETTINGS; menu_insert_item(menu, "WiFi settings", NULL, settings_args, -1); menu_args_t* ota_args = malloc(sizeof(menu_args_t)); ota_args->action = ACTION_OTA; menu_insert_item(menu, "Firmware update", NULL, ota_args, -1); menu_args_t* fpga_args = malloc(sizeof(menu_args_t)); fpga_args->action = ACTION_FPGA; menu_insert_item(menu, "FPGA test", NULL, fpga_args, -1); menu_args_t* rp2040bl_args = malloc(sizeof(menu_args_t)); rp2040bl_args->action = ACTION_RP2040_BL; menu_insert_item(menu, "RP2040 bootloader", NULL, rp2040bl_args, -1); menu_args_t* wifi_connect_args = malloc(sizeof(menu_args_t)); wifi_connect_args->action = ACTION_WIFI_CONNECT; menu_insert_item(menu, "WiFi connect", NULL, wifi_connect_args, -1); bool render = true; menu_args_t* menuArgs = NULL; while (1) { rp2040_input_message_t buttonMessage = {0}; if (xQueueReceive(buttonQueue, &buttonMessage, 16 / portTICK_PERIOD_MS) == pdTRUE) { uint8_t pin = buttonMessage.input; bool value = buttonMessage.state; switch(pin) { case RP2040_INPUT_JOYSTICK_DOWN: if (value) { menu_navigate_next(menu); render = true; } break; case RP2040_INPUT_JOYSTICK_UP: if (value) { menu_navigate_previous(menu); render = true; } break; case RP2040_INPUT_BUTTON_ACCEPT: if (value) { menuArgs = menu_get_callback_args(menu, menu_get_position(menu)); } break; default: break; } } if (render) { graphics_task(pax_buffer, ili9341, framebuffer, menu, NULL); render = false; } if (menuArgs != NULL) { *appfs_fd = menuArgs->fd; *menu_action = menuArgs->action; break; } } for (size_t index = 0; index < menu_get_length(menu); index++) { free(menu_get_callback_args(menu, index)); } menu_free(menu); } void menu_wifi_settings(xQueueHandle buttonQueue, pax_buf_t* pax_buffer, ILI9341* ili9341, uint8_t* framebuffer, menu_action_t* menu_action) { menu_t* menu = menu_alloc("WiFi settings"); *menu_action = ACTION_NONE; menu_args_t* wifi_scan_args = malloc(sizeof(menu_args_t)); wifi_scan_args->action = ACTION_WIFI_SCAN; menu_insert_item(menu, "Add by scan...", NULL, wifi_scan_args, -1); menu_args_t* wifi_manual_args = malloc(sizeof(menu_args_t)); wifi_manual_args->action = ACTION_WIFI_MANUAL; menu_insert_item(menu, "Add manually...", NULL, wifi_manual_args, -1); menu_args_t* wifi_list_args = malloc(sizeof(menu_args_t)); wifi_list_args->action = ACTION_WIFI_LIST; menu_insert_item(menu, "List known networks", NULL, wifi_list_args, -1); menu_args_t* back_args = malloc(sizeof(menu_args_t)); back_args->action = ACTION_BACK; menu_insert_item(menu, "< Back", NULL, back_args, -1); bool render = true; menu_args_t* menuArgs = NULL; while (1) { rp2040_input_message_t buttonMessage = {0}; if (xQueueReceive(buttonQueue, &buttonMessage, 16 / portTICK_PERIOD_MS) == pdTRUE) { uint8_t pin = buttonMessage.input; bool value = buttonMessage.state; switch(pin) { case RP2040_INPUT_JOYSTICK_DOWN: if (value) { menu_navigate_next(menu); render = true; } break; case RP2040_INPUT_JOYSTICK_UP: if (value) { menu_navigate_previous(menu); render = true; } break; case RP2040_INPUT_BUTTON_ACCEPT: if (value) { menuArgs = menu_get_callback_args(menu, menu_get_position(menu)); } break; default: break; } } if (render) { graphics_task(pax_buffer, ili9341, framebuffer, menu, NULL); render = false; } if (menuArgs != NULL) { *menu_action = menuArgs->action; break; } } for (size_t index = 0; index < menu_get_length(menu); index++) { free(menu_get_callback_args(menu, index)); } menu_free(menu); } void app_main(void) { esp_err_t res; /* Initialize memory */ uint8_t* framebuffer = heap_caps_malloc(ILI9341_BUFFER_SIZE, MALLOC_CAP_8BIT); if (framebuffer == NULL) { ESP_LOGE(TAG, "Failed to allocate framebuffer"); restart(); } memset(framebuffer, 0, ILI9341_BUFFER_SIZE); pax_buf_t* pax_buffer = malloc(sizeof(pax_buf_t)); if (framebuffer == NULL) { ESP_LOGE(TAG, "Failed to allocate pax buffer"); restart(); } memset(pax_buffer, 0, sizeof(pax_buf_t)); pax_buf_init(pax_buffer, framebuffer, ILI9341_WIDTH, ILI9341_HEIGHT, PAX_BUF_16_565RGB); driver_framebuffer_init(framebuffer); /* Initialize hardware */ bool lcdReady = false; res = board_init(&lcdReady); if (res != ESP_OK) { if (lcdReady) { ILI9341* ili9341 = get_ili9341(); graphics_task(pax_buffer, ili9341, framebuffer, NULL, "Hardware error!"); } printf("Failed to initialize hardware!\n"); restart(); } ILI9341* ili9341 = get_ili9341(); ICE40* ice40 = get_ice40(); BNO055* bno055 = get_bno055(); RP2040* rp2040 = get_rp2040(); graphics_task(pax_buffer, ili9341, framebuffer, NULL, "AppFS init..."); res = appfs_init(); if (res != ESP_OK) { ESP_LOGE(TAG, "AppFS init failed: %d", res); graphics_task(pax_buffer, ili9341, framebuffer, NULL, "AppFS init failed!"); return; } ESP_LOGI(TAG, "AppFS initialized"); graphics_task(pax_buffer, ili9341, framebuffer, NULL, "NVS init..."); res = nvs_init(); if (res != ESP_OK) { ESP_LOGE(TAG, "NVS init failed: %d", res); graphics_task(pax_buffer, ili9341, framebuffer, NULL, "NVS init failed!"); return; } ESP_LOGI(TAG, "NVS initialized"); graphics_task(pax_buffer, ili9341, framebuffer, NULL, "Mount SD card..."); res = mount_sd(SD_CMD, SD_CLK, SD_D0, SD_PWR, "/sd", false, 5); bool sdcard_ready = (res == ESP_OK); if (sdcard_ready) { graphics_task(pax_buffer, ili9341, framebuffer, NULL, "SD card mounted"); } ws2812_init(GPIO_LED_DATA); uint8_t ledBuffer[15] = {50, 0, 0, 50, 0, 0, 50, 0, 0, 50, 0, 0, 50, 0, 0}; ws2812_send_data(ledBuffer, sizeof(ledBuffer)); uint8_t fw_version; if (rp2040_get_firmware_version(rp2040, &fw_version) != ESP_OK) { graphics_task(pax_buffer, ili9341, framebuffer, NULL, "RP2040 FW VERSION READ FAILED"); restart(); } if (fw_version == 0xFF) { // RP2040 is in bootloader mode char message[64]; pax_noclip(pax_buffer); pax_background(pax_buffer, 0x325aa8); snprintf(message, sizeof(message) - 1, "Updating RP2040..."); pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 18, 0, 20*0, message); ili9341_write(ili9341, framebuffer); uint8_t bl_version; if (rp2040_get_bootloader_version(rp2040, &bl_version) != ESP_OK) { pax_noclip(pax_buffer); pax_background(pax_buffer, 0xa85a32); snprintf(message, sizeof(message) - 1, "RP2040 update failed"); pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 18, 0, 20*0, message); snprintf(message, sizeof(message) - 1, "Communication error (1)"); pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 12, 0, 20*1, message); ili9341_write(ili9341, framebuffer); restart(); } /*if (bl_version != 0x01) { graphics_task(pax_buffer, ili9341, framebuffer, NULL, "Unknown BL version"); restart(); }*/ rp2040_bl_install_uart(); pax_noclip(pax_buffer); pax_background(pax_buffer, 0x325aa8); snprintf(message, sizeof(message) - 1, "Updating RP2040..."); pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 18, 0, 20*0, message); snprintf(message, sizeof(message) - 1, "Waiting for bootloader"); pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 12, 0, 20*1, message); ili9341_write(ili9341, framebuffer); while (true) { vTaskDelay(1 / portTICK_PERIOD_MS); uint8_t bl_state; if (rp2040_get_bootloader_state(rp2040, &bl_state) != ESP_OK) { pax_noclip(pax_buffer); pax_background(pax_buffer, 0xa85a32); snprintf(message, sizeof(message) - 1, "RP2040 update failed"); pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 18, 0, 20*0, message); snprintf(message, sizeof(message) - 1, "Communication error (2)"); pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 12, 0, 20*1, message); ili9341_write(ili9341, framebuffer); restart(); } if (bl_state == 0xB0) { break; } if (bl_state > 0xB0) { graphics_task(pax_buffer, ili9341, framebuffer, NULL, "Unknown BL state"); restart(); } } pax_noclip(pax_buffer); pax_background(pax_buffer, 0x325aa8); snprintf(message, sizeof(message) - 1, "Updating RP2040..."); pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 18, 0, 20*0, message); snprintf(message, sizeof(message) - 1, "Waiting for bootloader sync"); pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 12, 0, 20*1, message); ili9341_write(ili9341, framebuffer); char rx_buffer[16]; uint8_t rx_buffer_pos = 0; memset(rx_buffer, 0, sizeof(rx_buffer)); while (true) { if (rp2040_bl_sync()) break; vTaskDelay(500 / portTICK_PERIOD_MS); } uint32_t flash_start = 0, flash_size = 0, erase_size = 0, write_size = 0, max_data_len = 0; bool success = rp2040_bl_get_info(&flash_start, &flash_size, &erase_size, &write_size, &max_data_len); if (!success) { pax_noclip(pax_buffer); pax_background(pax_buffer, 0xa85a32); snprintf(message, sizeof(message) - 1, "RP2040 update failed"); pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 18, 0, 20*0, message); snprintf(message, sizeof(message) - 1, "Failed to read information"); pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 12, 0, 20*1, message); ili9341_write(ili9341, framebuffer); restart(); } /*pax_noclip(pax_buffer); pax_background(pax_buffer, 0xCCCCCC); char message[64]; memset(message, 0, sizeof(message)); snprintf(message, sizeof(message) - 1, "Flash start: 0x%08X", flash_start); pax_draw_text(pax_buffer, 0xFF000000, NULL, 18, 0, 20*0, message); snprintf(message, sizeof(message) - 1, "Flash size : 0x%08X", flash_size); pax_draw_text(pax_buffer, 0xFF000000, NULL, 18, 0, 20*1, message); snprintf(message, sizeof(message) - 1, "Erase size : 0x%08X", erase_size); pax_draw_text(pax_buffer, 0xFF000000, NULL, 18, 0, 20*2, message); snprintf(message, sizeof(message) - 1, "Write size : 0x%08X", write_size); pax_draw_text(pax_buffer, 0xFF000000, NULL, 18, 0, 20*3, message); snprintf(message, sizeof(message) - 1, "Max data ln: 0x%08X", max_data_len); pax_draw_text(pax_buffer, 0xFF000000, NULL, 18, 0, 20*4, message); ili9341_write(ili9341, framebuffer);*/ pax_noclip(pax_buffer); pax_background(pax_buffer, 0x325aa8); snprintf(message, sizeof(message) - 1, "Updating RP2040..."); pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 18, 0, 20*0, message); snprintf(message, sizeof(message) - 1, "Erasing flash"); pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 12, 0, 20*1, message); ili9341_write(ili9341, framebuffer); uint32_t erase_length = sizeof(mch2022_firmware_bin); erase_length = erase_length + erase_size - (erase_length % erase_size); // Round up to erase size if (erase_length > flash_size - erase_size) { erase_length = flash_size - erase_size; } bool eraseSuccess = rp2040_bl_erase(flash_start, erase_length); if (!eraseSuccess) { pax_noclip(pax_buffer); pax_background(pax_buffer, 0xa85a32); snprintf(message, sizeof(message) - 1, "RP2040 update failed"); pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 18, 0, 20*0, message); snprintf(message, sizeof(message) - 1, "Failed to erase flash"); pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 12, 0, 20*1, message); ili9341_write(ili9341, framebuffer); vTaskDelay(1000 / portTICK_PERIOD_MS); restart(); } uint32_t position = 0; uint32_t txSize = write_size; uint8_t* txBuffer = malloc(write_size); uint32_t blockCrc = 0; uint32_t totalCrc = 0; uint32_t totalLength = 0; while (true) { if ((sizeof(mch2022_firmware_bin) - position) < txSize) { txSize = sizeof(mch2022_firmware_bin) - position; } if (txSize == 0) break; uint8_t percentage = position * 100 / sizeof(mch2022_firmware_bin); pax_noclip(pax_buffer); pax_background(pax_buffer, 0x325aa8); snprintf(message, sizeof(message) - 1, "Updating RP2040... %u%%", percentage); pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 18, 0, 20*0, message); snprintf(message, sizeof(message) - 1, "Writing @ 0x%08X", 0x10010000 + position); pax_draw_text(pax_buffer, 0xFFFFFFFF, NULL, 12, 0, 20*1, message); ili9341_write(ili9341, framebuffer); uint32_t checkCrc = 0; memset(txBuffer, 0, write_size); memcpy(txBuffer, &mch2022_firmware_bin[position], txSize); blockCrc = crc32_le(0, txBuffer, write_size); totalCrc = crc32_le(totalCrc, txBuffer, write_size); totalLength += write_size; bool writeSuccess = rp2040_bl_write(0x10010000 + position, write_size, txBuffer, &checkCrc); if (writeSuccess && (blockCrc == checkCrc)) { position += txSize; } else { while (!rp2040_bl_sync()) { vTaskDelay(20 / portTICK_PERIOD_MS); } } } free(txBuffer); pax_noclip(pax_buffer); pax_background(pax_buffer, 0xCCCCCC); memset(message, 0, sizeof(message)); snprintf(message, sizeof(message) - 1, "Sealing..."); pax_draw_text(pax_buffer, 0xFF000000, NULL, 18, 0, 20*0, message); ili9341_write(ili9341, framebuffer); bool sealRes = rp2040_bl_seal(0x10010000, 0x10010000, totalLength, totalCrc); snprintf(message, sizeof(message) - 1, "Result: %s", sealRes ? "OK" : "FAIL"); pax_draw_text(pax_buffer, 0xFF000000, NULL, 18, 0, 20*1, message); ili9341_write(ili9341, framebuffer); if (sealRes) { vTaskDelay(2000 / portTICK_PERIOD_MS); pax_noclip(pax_buffer); pax_background(pax_buffer, 0xCCCCCC); memset(message, 0, sizeof(message)); snprintf(message, sizeof(message) - 1, "Waiting for reset..."); pax_draw_text(pax_buffer, 0xFF000000, NULL, 18, 0, 20*0, message); ili9341_write(ili9341, framebuffer); rp2040_bl_go(0x10010000); } while (true) { vTaskDelay(1000 / portTICK_PERIOD_MS); } } pax_noclip(pax_buffer); pax_background(pax_buffer, 0xCCCCCC); char message[64]; memset(message, 0, sizeof(message)); snprintf(message, sizeof(message) - 1, "RP2040 firmware: 0x%02X", fw_version); pax_draw_text(pax_buffer, 0xFF000000, NULL, 18, 0, 20*0, message); ili9341_write(ili9341, framebuffer); vTaskDelay(1000 / portTICK_PERIOD_MS); while (true) { menu_action_t menu_action; appfs_handle_t appfs_fd; menu_launcher(rp2040->queue, pax_buffer, ili9341, framebuffer, &menu_action, &appfs_fd); if (menu_action == ACTION_APPFS) { appfs_boot_app(appfs_fd); } else if (menu_action == ACTION_FPGA) { graphics_task(pax_buffer, ili9341, framebuffer, NULL, "Loading..."); fpga_test(ili9341, ice40, rp2040->queue); } else if (menu_action == ACTION_RP2040_BL) { graphics_task(pax_buffer, ili9341, framebuffer, NULL, "RP2040 update..."); rp2040_reboot_to_bootloader(rp2040); esp_restart(); } else if (menu_action == ACTION_INSTALLER) { graphics_task(pax_buffer, ili9341, framebuffer, NULL, "Installing..."); appfs_store_app(pax_buffer, ili9341, framebuffer); } else if (menu_action == ACTION_WIFI_CONNECT) { graphics_task(pax_buffer, ili9341, framebuffer, NULL, "Connecting..."); nvs_handle_t handle; nvs_open("system", NVS_READWRITE, &handle); char ssid[33]; char password[33]; size_t requiredSize; esp_err_t res = nvs_get_str(handle, "wifi.ssid", NULL, &requiredSize); if (res != ESP_OK) { strcpy(ssid, ""); } else if (requiredSize < sizeof(ssid)) { res = nvs_get_str(handle, "wifi.ssid", ssid, &requiredSize); if (res != ESP_OK) strcpy(ssid, ""); res = nvs_get_str(handle, "wifi.password", NULL, &requiredSize); if (res != ESP_OK) { strcpy(password, ""); } else if (requiredSize < sizeof(password)) { res = nvs_get_str(handle, "wifi.password", password, &requiredSize); if (res != ESP_OK) strcpy(password, ""); } } nvs_close(&handle); wifi_init(ssid, password, WIFI_AUTH_WPA2_PSK, 3); } else if (menu_action == ACTION_OTA) { graphics_task(pax_buffer, ili9341, framebuffer, NULL, "Firmware update..."); } else if (menu_action == ACTION_SETTINGS) { while (true) { menu_wifi_settings(rp2040->queue, pax_buffer, ili9341, framebuffer, &menu_action); if (menu_action == ACTION_WIFI_MANUAL) { nvs_handle_t handle; nvs_open("system", NVS_READWRITE, &handle); char ssid[33]; char password[33]; size_t requiredSize; esp_err_t res = nvs_get_str(handle, "wifi.ssid", NULL, &requiredSize); if (res != ESP_OK) { strcpy(ssid, ""); strcpy(password, ""); } else if (requiredSize < sizeof(ssid)) { res = nvs_get_str(handle, "wifi.ssid", ssid, &requiredSize); if (res != ESP_OK) strcpy(ssid, ""); res = nvs_get_str(handle, "wifi.password", NULL, &requiredSize); if (res != ESP_OK) { strcpy(password, ""); } else if (requiredSize < sizeof(password)) { res = nvs_get_str(handle, "wifi.password", password, &requiredSize); if (res != ESP_OK) strcpy(password, ""); } } bool accepted = keyboard(rp2040->queue, pax_buffer, ili9341, framebuffer, 30, 30, pax_buffer->width - 60, pax_buffer->height - 60, "WiFi SSID", "Press HOME to exit", ssid, sizeof(ssid)); if (accepted) { accepted = keyboard(rp2040->queue, pax_buffer, ili9341, framebuffer, 30, 30, pax_buffer->width - 60, pax_buffer->height - 60, "WiFi password", "Press HOME to exit", password, sizeof(password)); } if (accepted) { nvs_set_str(handle, "wifi.ssid", ssid); nvs_set_str(handle, "wifi.password", password); graphics_task(pax_buffer, ili9341, framebuffer, NULL, "WiFi settings stored"); } else { graphics_task(pax_buffer, ili9341, framebuffer, NULL, "Canceled"); } nvs_close(&handle); } else if (menu_action == ACTION_WIFI_LIST) { nvs_handle_t handle; nvs_open("system", NVS_READWRITE, &handle); char ssid[33]; char password[33]; size_t requiredSize; esp_err_t res = nvs_get_str(handle, "wifi.ssid", NULL, &requiredSize); if (res != ESP_OK) { strcpy(ssid, ""); } else if (requiredSize < sizeof(ssid)) { res = nvs_get_str(handle, "wifi.ssid", ssid, &requiredSize); if (res != ESP_OK) strcpy(ssid, ""); res = nvs_get_str(handle, "wifi.password", NULL, &requiredSize); if (res != ESP_OK) { strcpy(password, ""); } else if (requiredSize < sizeof(password)) { res = nvs_get_str(handle, "wifi.password", password, &requiredSize); if (res != ESP_OK) strcpy(password, ""); } } nvs_close(&handle); char buffer[300]; snprintf(buffer, sizeof(buffer), "SSID is %s\nPassword is %s", ssid, password); graphics_task(pax_buffer, ili9341, framebuffer, NULL, buffer); } else { break; } } } } free(framebuffer); }