今日任务：继续实现人体感应功能。请教陈大佬，教我多线程方法，实现了具体功能。
1.需要新建线程：
static void ExampleEntry(void)
{
evt_id2 = osEventFlagsNew(NULL);
if (evt_id2 == NULL)
{
printf("Falied to create EventFlags!\n");
}
osThreadAttr_t attr;
attr.name = "Example_Task";
attr.attr_bits = 0U;
attr.cb_mem = NULL;
attr.cb_size = 0U;
attr.stack_mem = NULL;
attr.stack_size = TASK_STACK_SIZE;
attr.priority = TASK_PRIO;
if (osThreadNew((osThreadFunc_t)Example_Task, NULL, &attr) == NULL)
{
printf("Falied to create Example_Task!\n");
}
}
（注意：要定义在入口线程前）
2.在入口线程末端加入本线程入口ExampleEntry()
3.本线程会执行Example_Task，此处就是传感器代码：
static void Example_Task(void)
{
// E53_IS1_Init();
// E53_IS1_Read_Data(Beep_Alarm);
while (1)
{
osEventFlagsWait(evt_id2, FLAGS_MSK1, osFlagsWaitAny, osWaitForever);
Beep_StatusSet(ON);
char data1 = "true";
send(new_fd, data1, strlen(data1), 0);
bzero(recvbuf, sizeof(recvbuf));
GpioSetOutputVal(WIFI_IOT_GPIO_IDX_2, 1);
osDelay(200);
Beep_StatusSet(OFF);
GpioSetOutputVal(WIFI_IOT_GPIO_IDX_2, 0);
}
}
4：此线程会等待阻塞，等待设备端发送信号打开传感器，并监听物体靠近，标志位FLAGS_MSK1变化后执行之后函数。
osEventFlagsWait(evt_id2, FLAGS_MSK1, osFlagsWaitAny, osWaitForever);
5：所以主线程tcp发送消息，标志位会随物体靠近变化，主线程判断与相应语句：
if (strcmp(recvbuf, "rentiganyingon") == 0)
{
E53_IS1_Init();
E53_IS1_Read_Data(Beep_Alarm);
}
6：有物体靠近时发送true消息，前端利用消息判断并改变UI状态
BQ3568前端实现报警代码如下，点击开启后，有人靠近会报警，记录靠近次数，靠近会有图片与文字同步变化：
import router from '@ohos.router'
import promptAction from '@ohos.promptAction'
@Component
struct PageTitle {
build() {
Row() {
Image($r('app.media.back'))
.width(20)
.height(20)
.onClick(() => {
router.back()
})
Text("人体感应")
.fontSize(22)
.margin({ left: 20 })
}
.padding(12)
.width('100%')
}
}
@Component
struct oneTable {
@State message: string = ''
@State imageBgColorA: number = 0
@StorageProp('currentBreakpoint') currentBreakpoint: string = 'sm'
@State jingbao: number = 0
@State cishu: number = 0
private timer: number = 0
@Builder IngredientItem() {
Stack({ alignContent: Alignment.BottomStart }) {
Image(this.jingbao? $r("app.media.ren_youren") : $r("app.media.ren_wuren0"))
.backgroundColor(`rgba(255, 255, 255, ${this.imageBgColorA})`)
.objectFit(ImageFit.Contain)
Text(this.jingbao ? "有人靠近" :"无人靠近" )
.align(Alignment.Center).width('50%').fontSize(25).height('10%')
}
.height(this.currentBreakpoint == 'lg' ? 166 : 280)
Column() {
Flex({ direction: FlexDirection.Column, justifyContent: FlexAlign.Center }) {
Column() {
Row() {
Text("人体感应")
.fontSize(18)
.fontWeight(FontWeight.Bold)
.layoutWeight(1)
.align(Alignment.Start)
Row() {
Button('开', { type: ButtonType.Normal, stateEffect: true })
.borderRadius(8)
.backgroundColor(0x317aff)
.width(90)
.onClick(() => {
promptAction.showToast({
message: '人体感应已打开',
duration: 1500
});
globalThis.tcp.connect({ address: globalThis.mixeraddr , timeout: 6000 }, () => {
// 电脑ip
// tcp.connect({ address: { address: '192.168.2.125', port: 3861, family: 1 }, timeout: 6000 }, () => {
console.log('connect success');
globalThis.tcp.send({
data: 'rentiganyingon'
//此处省略encoding， 默认为utf-8编码格式
}, err => {
if (err) {
console.log('send fail' + JSON.stringify(err));
return;
}
console.log('send success');
})
})
globalThis.tcp.on('message', value => {
console.log("on message")
let buffer = value.message
let dataView = new DataView(buffer)
let str = ""
/* clearInterval(this.timer)
this.timer = setTimeout(() => {
}, 500)*/
for (let i = 0; i < dataView.byteLength; ++i) {
str += String.fromCharCode(dataView.getUint8(i))
}
console.log("on connect received:" + str)
if(Boolean(str)){
this.cishu ++;
this.jingbao = 1;
clearInterval(this.timer)
this.timer = setTimeout(() => {
this.jingbao = 0
}, 2000)
}
// else{
// }
});
})
Blank()
Button('关', { type: ButtonType.Normal, stateEffect: true })
.borderRadius(8)
.backgroundColor(0x317aff)
.width(90)
.onClick(() => {
promptAction.showToast({
message: '人体感应已关闭',
duration: 1500
});
globalThis.tcp.connect({ address: globalThis.mixeraddr , timeout: 6000 }, () => {
// 电脑ip
// tcp.connect({ address: { address: '192.168.2.125', port: 3861, family: 1 }, timeout: 6000 }, () => {
console.log('connect success');
globalThis.tcp.send({
data: 'rentiganyingoff'
//此处省略encoding， 默认为utf-8编码格式
}, err => {
if (err) {
console.log('send fail' + JSON.stringify(err));
return;
}
console.log('send success');
})
})
})
}
.width('100%')
.layoutWeight(2)
}
.padding(20)
.margin({ bottom: 20 })
Row(){
Text('报警日志：')
.align(Alignment.Center)
.width('40%')
Text(this.cishu.toString()+"次")
.width('40%').align(Alignment.Center)
}
}
}
}.height('50%')
.backgroundColor(Color.White)
}
build() {
Column() {
this.IngredientItem()
}
}
}
@Entry
@Component
struct fengshan {
build() {
Scroll() {
Column() {
PageTitle()
Swiper() {
oneTable()
}
.clip(new Rect().width('100%').height('100%').radiusWidth(15).radiusHeight(15))
.itemSpace(20)
.height(630)
.indicatorStyle({ selectedColor: Color.Green })
.margin({ top: 10, right: 10, left: 10 })
}
.alignItems(HorizontalAlign.Center)
}
.backgroundColor('#EDF2F5')
.height('100%')
.align(Alignment.Top)
}
}
学习线程连续打印：
void thread1(void)
{
int sum=0;
while (1)
{
/* code */
printf("This is BearPi-HM_Nano Thread1----%d\r\n",sum++);
usleep(1000000);
}
}
void thread2(void)
{
int sum=0;
while (1)
{
/* code */
printf("This is BearPi-HM_Nano Thread2----%d\r\n",sum++);
usleep(500000);
}
}
static void Thread_example(void)
{
osThreadAttr_t attr;
attr.name = "thread1";
attr.attr_bits = 0U;
attr.cb_mem = NULL;
attr.cb_size = 0U;
attr.stack_mem = NULL;
attr.stack_size = 1024*4;
attr.priority = 25;
if (osThreadNew((osThreadFunc_t)thread1, NULL, &attr) == NULL) {
printf("Falied to create thread1!\n");
}
attr.name = "thread2";
if (osThreadNew((osThreadFunc_t)thread2, NULL, &attr) == NULL) {
printf("Falied to create thread2!\n");
}
}