lv_obj_t * charts[4];
lv_chart_series_t* ser[4];
static lv_timer_t * chart_update_timer[4];
static lv_timer_t * data_add_timer[4];
static lv_obj_t * btn[4];
static lv_obj_t * label[4];
static bool is_paused[4] = {false, false, false, false};
typedef struct Node {
float data; // 假设队列存储的是整数
struct Node* next;
} Node;
typedef struct {
Node* front; // 队列前端
Node* rear; // 队列后端
} Queue;
Queue dataQueue[4];
// 初始化队列，都设为空表示队列为空
void initQueue(Queue* q) {
q->front = q->rear = NULL;
}
// 检查队列是否为空
int isEmpty(Queue* q) {
return q->front == NULL;
}
// 入队
void enqueue(Queue* q, int value) {
Node* newNode = (Node*)malloc(sizeof(Node));
if (newNode == NULL) {
// 处理内存分配失败的情况
printf("Memory allocation failed\n");
return;
}
newNode->data = value;
newNode->next = NULL;
if (q->rear == NULL) { // 队列为空
q->front = q->rear = newNode;
}
else {
q->rear->next = newNode;
q->rear = newNode;
}
}
// 出队
int dequeue(Queue* q) {
if (isEmpty(q)) {
printf("Queue is empty\n");
return -1.0f; // 使用 float 并返回特殊值表示错误
}
Node* temp = q->front;
float value = temp->data;
q->front = q->front->next;
if (q->front == NULL) {
q->rear = NULL;
}
free(temp);
return value;
}
// 销毁队列（释放所有内存）
void destroyQueue(Queue* q) {
Node* current = q->front;
Node* next;
while (current != NULL) {
next = current->next;
free(current);
current = next;
}
q->front = q->rear = NULL;
}
static void add_data(lv_timer_t * timer)
{
LV_UNUSED(timer);
int16_t fangbo, jucibo;
for (int i = 0; i < 4; i++) {
if (!is_paused[i]) {
static float angle = 0; // 为每个图表使用不同的角度可能会导致混乱，这里仅为示例
angle += 0.1;
if (angle > 2 * M_PI) angle -= 2 * M_PI;
if (i == 1) {
fangbo = (int)(rand() % 100); // 假设使用随机数模拟数据
enqueue(&dataQueue[i], fangbo);
} else if (i == 0) {
int value = (int)(50 + 40 * sin(angle));
enqueue(&dataQueue[i], value);
} else if (i == 2) {
int value = (int)(50 + 40 * cos(angle));
enqueue(&dataQueue[i], value);
} else if (i == 3) {
jucibo = (int)(rand() % 100); // 假设使用随机数模拟数据
enqueue(&dataQueue[i], jucibo);
}
}
}
}
static void update_chart(lv_timer_t * timer) {
for (int i = 0; i < 4; i++) {
if (!isEmpty(&dataQueue[i])) {
float value = dequeue(&dataQueue[i]);
lv_chart_set_next_value(charts[i], ser[i], (int16_t)value); // 注意类型转换
lv_chart_refresh(charts[i]); // 刷新图表
}
}
}
static void everyBtn_event (lv_event_t * event)
{
lv_event_code_t code = lv_event_get_code(event);
lv_obj_t * btn_clicked = lv_event_get_target(event);
if (code == LV_EVENT_CLICKED) {
for (int i = 0; i < 4; i++) {
if (btn_clicked == btn[i]) {
if (is_paused[i]) {
// 如果当前是暂停状态，则启动定时器
if (!data_add_timer[i]) {
data_add_timer[i] = lv_timer_create(add_data, 50, NULL);
}
if (!chart_update_timer[i]) {
chart_update_timer[i] = lv_timer_create(update_chart, 50, NULL);
}
lv_label_set_text(lv_obj_get_child(btn[i], 0), "Resume");
is_paused[i] = false;
} else {
// 如果当前是运行状态，则停止定时器
if (data_add_timer[i]) {
lv_timer_del(data_add_timer[i]);
data_add_timer[i] = NULL;
}
if (chart_update_timer[i]) {
lv_timer_del(chart_update_timer[i]);
chart_update_timer[i] = NULL;
}
lv_label_set_text(lv_obj_get_child(btn[i], 0), "Pause");
is_paused[i] = true;
}
}
}
}
}
void init_chart(void)
{
for(int i=0;i<4;i++)
{
initQueue(&dataQueue[i]);
charts[i]=lv_chart_create(lv_scr_act());
lv_obj_set_size(charts[i],350,100);
lv_obj_set_pos(charts[i],225,i * 100);
lv_chart_set_point_count(charts[i],100);
lv_chart_set_div_line_count(charts[i],0,0);
lv_obj_set_style_size(charts[i],0,LV_PART_INDICATOR);
lv_obj_set_style_bg_color(charts[i], lv_color_hex(0x575757), LV_STATE_DEFAULT);
ser[i] = lv_chart_add_series(charts[i],
lv_palette_main(LV_PALETTE_BLUE),
LV_CHART_AXIS_PRIMARY_X);
lv_chart_set_update_mode(charts[i], LV_CHART_UPDATE_MODE_SHIFT);
//添加控制按钮
btn[i] = lv_btn_create(lv_scr_act());
lv_obj_set_size(btn[i],80,50);
lv_obj_align_to(btn[i],charts[i],LV_ALIGN_OUT_LEFT_MID,-50,0);
label[i] = lv_label_create(btn[i]);
lv_label_set_text(label[i], "Pause");
lv_obj_center(label[i]);
//给按钮添加事件，点击暂停
lv_obj_add_event_cb(btn[i],everyBtn_event,LV_EVENT_CLICKED,NULL);
//添加定时器把波形数据加入队列
data_add_timer[i]= lv_timer_create(add_data,50 , NULL);
//此定时器是为了把队列数据输出给chart控件以生成波形
chart_update_timer[i] = lv_timer_create(update_chart, 50 , NULL);
lv_chart_refresh(charts[i]);
}
}
void spinner(void)
{
init_chart();
}
是共用定时器的问题么。
你这代码写得有点乱，不需要使用btn数组记录每个按钮的状态，回调函数也不是一次就要将所有的btn的都遍历一遍；定时器的暂停与恢复有专门的函数接口，而不是直接del然后再create了，请先看看我们的视频教程吧：