I've been making a UI on the Giga Display Shield that connects to wifi but when searching for wifi networks the UI freezes and doesn't respond. I've been trying to make it so that lv_task_handler(); is instead called on the M4, so it doesn't freeze when scanning for networks. This is my code
#include "Arduino_H7_Video.h"
#include "lvgl.h"
#include "Arduino_GigaDisplayTouch.h"
#include <WiFi.h>
#include "RPC.h"
Arduino_H7_Video Display(800, 480, GigaDisplayShield);
Arduino_GigaDisplayTouch TouchDetector;
bool ssid_selected = false;
bool keyboard_should_hide = true;
lv_obj_t * wifiList;
lv_obj_t * currentButton;
lv_obj_t * ssidLabel;
int status = WL_IDLE_STATUS;
lv_obj_t * ta_pass;
lv_obj_t * wifiGrid;
lv_obj_t* screen;
lv_obj_t* ssid_btn = NULL;
void ta_event_cb(lv_event_t * e)
{
lv_event_code_t code = lv_event_get_code(e);
lv_obj_t * ta = lv_event_get_target(e);
lv_obj_t * kb = (lv_obj_t*) lv_event_get_user_data(e);
if(code == LV_EVENT_FOCUSED) {
lv_keyboard_set_textarea(kb, ta);
if (keyboard_should_hide){
lv_obj_clear_flag(kb, LV_OBJ_FLAG_HIDDEN);
}
}
if(code == LV_EVENT_DEFOCUSED) {
lv_keyboard_set_textarea(kb, NULL);
if (keyboard_should_hide){
lv_obj_add_flag(kb, LV_OBJ_FLAG_HIDDEN);
}
}
}
void wifiListEventHandler(lv_event_t * e)
{
lv_event_code_t code = lv_event_get_code(e);
lv_obj_t * obj = lv_event_get_target(e);
if(code == LV_EVENT_CLICKED) {
if(currentButton == obj) {
currentButton = NULL;
}
else {
currentButton = obj;
}
lv_obj_t * parent = lv_obj_get_parent(obj);
uint32_t i;
for(i = 0; i < lv_obj_get_child_cnt(parent); i++) {
lv_obj_t * child = lv_obj_get_child(parent, i);
if(child == currentButton) {
lv_obj_add_state(child, LV_STATE_CHECKED);
lv_label_set_text(ssidLabel, lv_list_get_btn_text(wifiList, obj));
lv_obj_clear_flag(ssid_btn, LV_OBJ_FLAG_HIDDEN);
ssid_selected = true;
}
else {
lv_obj_clear_state(child, LV_STATE_CHECKED);
}
}
}
}
void event_cb(lv_event_t * e)
{
lv_obj_t * obj = lv_event_get_target(e);
LV_UNUSED(obj);
LV_LOG_USER("Button %s clicked", lv_msgbox_get_active_button_text(obj));
}
void next_btn_event(lv_event_t * e) {
if (ssid_selected){
Serial.println(lv_label_get_text(ssidLabel));
if (WiFi.status() == WL_NO_MODULE) {
Serial.println("Communication with WiFi module failed!");
}
// attempt to connect to WiFi network:
while (status != WL_CONNECTED || status != 4) {
// Connect to WPA/WPA2 network:
status = WiFi.begin(lv_label_get_text(ssidLabel), lv_textarea_get_text(ta_pass));
Serial.println(status);
// wait 10 seconds for connection:
int start = millis();
while ((millis() - start) < 10000){
lv_task_handler();
lv_timer_handler();
}
}
if (status == WL_CONNECTED){
Serial.println("You're connected to the network");
}
else {
Serial.println("Wrong Password");
}
}
}
void wifiScan(lv_event_t * e = NULL){
lv_obj_t * btn;
lv_obj_clean(wifiList);
if (ssid_btn != NULL){
lv_obj_add_flag(ssid_btn, LV_OBJ_FLAG_HIDDEN);
}
ssid_selected = false;
int numSsid = WiFi.scanNetworks();
if (numSsid != -1) {
for (int thisNet = 0; thisNet < numSsid; thisNet++) {
String ssid = WiFi.SSID(thisNet);
if (!ssid.equals("")){
btn = lv_list_add_btn(wifiList, LV_SYMBOL_WIFI, ssid.c_str());
lv_obj_add_event_cb(btn, wifiListEventHandler, LV_EVENT_CLICKED, NULL);
}
}
}
}
void startScreen(){
static lv_coord_t col_dsc[] = { 320, 420, LV_GRID_TEMPLATE_LAST };
static lv_coord_t row_dsc[] = { 440, LV_GRID_TEMPLATE_LAST };
lv_obj_set_grid_dsc_array(wifiGrid, col_dsc, row_dsc);
lv_obj_set_size(wifiGrid, Display.width(), Display.height());
lv_obj_set_style_bg_color(wifiGrid, lv_color_hex(0x03989e), LV_PART_MAIN);
//top left
lv_obj_t* obj;
lv_obj_t * label;
lv_obj_t * btn;
obj = lv_obj_create(wifiGrid);
lv_obj_set_grid_cell(obj, LV_GRID_ALIGN_STRETCH, 0, 1, //column
LV_GRID_ALIGN_STRETCH, 0, 1); //row
lv_obj_set_flex_flow(obj, LV_FLEX_FLOW_COLUMN);
lv_obj_set_flex_align(obj, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
wifiList = lv_list_create(obj);
lv_obj_set_style_pad_row(wifiList, 5, 0);
lv_obj_set_flex_grow(wifiList, 4);
wifiScan();
btn = lv_btn_create(obj);
lv_obj_set_size(btn, 100, 40);
lv_obj_add_event_cb(btn, wifiScan, LV_EVENT_CLICKED, NULL);
label = lv_label_create(btn);
lv_label_set_text(label, "Reload");
lv_obj_center(label);
//bottom left
obj = lv_obj_create(wifiGrid);
lv_obj_set_grid_cell(obj, LV_GRID_ALIGN_STRETCH, 1, 1, //column
LV_GRID_ALIGN_STRETCH, 0, 1); //row
lv_obj_set_flex_flow(obj, LV_FLEX_FLOW_COLUMN);
lv_obj_set_flex_align(obj, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
lv_obj_set_scrollbar_mode(obj, LV_SCROLLBAR_MODE_OFF);
lv_obj_clear_flag(obj, LV_OBJ_FLAG_SCROLLABLE);
ssidLabel = lv_label_create(obj);
lv_label_set_text(ssidLabel, "No Wifi Network Selected");
lv_obj_align(ssidLabel, LV_ALIGN_CENTER, 0, 0);
ta_pass = lv_textarea_create(obj);
lv_obj_t * kb = lv_keyboard_create(obj);
lv_obj_set_align(ta_pass, LV_ALIGN_CENTER);
lv_textarea_set_password_mode(ta_pass, true);
lv_obj_add_event_cb(ta_pass, ta_event_cb, LV_EVENT_ALL, kb);
lv_textarea_set_placeholder_text(ta_pass, "Wifi Password");
lv_obj_set_size(ta_pass, 380, 80);
lv_textarea_set_one_line(ta_pass, true);
keyboard_should_hide = false;
lv_keyboard_set_textarea(kb, ta_pass);
ssid_btn = lv_btn_create(obj);
lv_obj_set_size(ssid_btn, 100, 40);
lv_obj_add_event_cb(ssid_btn, next_btn_event, LV_EVENT_CLICKED, NULL);
label = lv_label_create(ssid_btn);
lv_label_set_text(label, "Connect");
lv_obj_center(label);
lv_obj_add_flag(ssid_btn, LV_OBJ_FLAG_HIDDEN);
}
void setup() {
Serial.begin(9600);
Serial.println("Start of setup");
Display.begin();
TouchDetector.begin();
screen = lv_obj_create(lv_scr_act());
wifiGrid = lv_obj_create(lv_scr_act());
lv_obj_set_size(screen, Display.width(), Display.height());
startScreen();
}
void loop() {
lv_task_handler();
lv_timer_handler();
}