Diff: main.cpp

Revision:

0:2ee762ea11b3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Jan 26 06:05:31 2018 +0000
@@ -0,0 +1,286 @@
+#include "mbed.h"
+
+#include <json/config.h>
+#include <json/value.h>
+#include <json/writer.h>
+#include <json/config.h>
+#include <json/json.h>
+#include <cstring>
+#include <limits>
+#include <sstream>
+#include <string>
+#include <iomanip>
+#include <stdio.h>
+#include <deque>
+
+DigitalOut led1(LED1);
+Serial pc(USBTX, USBRX);
+
+bool running;
+Thread thread;
+
+// Blink function toggles the led in a long running loop
+void blink(DigitalOut *led) {
+    while (running) {
+        *led = !*led;
+        wait(1);
+    }
+}
+
+void callback_ex() {
+    // Note: you need to actually read from the serial to clear the RX interrupt
+    int tmp=pc.getc();
+    //printf("%c\n", tmp);
+}
+
+// Spawns a thread to run blink for 5 seconds
+// main() runs in its own thread in the OS
+int main() {
+    
+    
+    pc.baud(9600);
+    pc.attach(&callback_ex);
+    
+    thread.start(callback(blink, &led1));
+    
+    running = true;
+
+    
+    //thread_gsensor.start(callback(gsensorThread));
+    //wait(1);
+    //thread_motor.start(callback(motorThread));
+    //wait(1);
+    //thread_sonar.start(callback(sonarThread));
+    
+    //Thread thread_sonar(sonarThread);
+    
+     Json::Reader reader;
+
+  Json::Value json_object;
+
+  const char* json_document = "{\"age\" : 26,\"name\" : \"huchao\"}";
+
+  if (!reader.parse(json_document, json_object))return 0;
+
+  printf("name : %s\n",json_object["name"]);
+
+  printf("name : %s\n",json_object["age"]);
+}
+
+
+/*
+主程序指定中断函数
+flipper.attach(&flip, 2.0); // the address of the function to be attached (flip) and the interval (2 seconds)
+
+主程序指定 类 的 方法
+t.attach(callback(&f, &Flipper::flip), 2.0); // the address of the object, member function, and interval
+
+
+1、线程
+需加载mbed-os
+
+#include "mbed.h"
+
+Thread thread;
+DigitalOut led1(LED1);
+volatile bool running = true;
+
+// Blink function toggles the led in a long running loop
+void blink(DigitalOut *led) {
+    while (running) {
+        *led = !*led;
+        wait(1);
+    }
+}
+
+// Spawns a thread to run blink for 5 seconds
+int main() {
+    thread.start(callback(blink, &led1));
+    wait(5);
+    running = false;
+    thread.join();
+}
+
+
+2、休眠+按键中断唤醒
+需更新mbed
+使用F401板时，IDD电流测试，运行时:18mA，灯亮时21 .2mA，睡眠时：6.26 mA，深度睡眠时：0.68 mA，
+
+RTC唤醒使用第三方类（未测试）
+
+#include "mbed.h"
+
+InterruptIn event(USER_BUTTON);
+DigitalOut myled(LED1);
+
+int go_to_sleep = 0;
+
+void pressed()
+{
+    printf("Button pressed\n");
+    go_to_sleep = go_to_sleep + 1;
+    if (go_to_sleep > 3) go_to_sleep = 0;
+
+}
+
+int main()
+{
+    int i = 0;
+
+    printf("\nPress Button to enter/exit sleep & deepsleep\n");
+
+    event.fall(&pressed);
+
+    while (1) {
+
+        if ((go_to_sleep == 0) || (go_to_sleep == 2)) {
+            printf("%d: Running\n", i);
+            myled = !myled;
+            wait(1.0);
+        }
+
+        if (go_to_sleep == 1) {
+            myled = 0;
+            printf("%d: Entering sleep (press user button to resume)\n", i);
+            sleep();
+        }
+
+        if (go_to_sleep == 3) {
+            myled = 0;
+            printf("%d: Entering deepsleep (press user button to resume)\n", i);
+            deepsleep();
+        }
+
+        i++;
+    }
+}
+
+
+3、系统定时器中断
+#include "mbed.h"
+
+Ticker toggle_led_ticker;
+
+DigitalOut led1(LED1);
+
+void toggle_led() {
+    led1 = !led1;
+}
+
+int main() {
+    // Init the ticker with the address of the function (toggle_led) to be attached and the interval (100 ms)
+    toggle_led_ticker.attach(&toggle_led, 0.1);
+    while (true) {
+        // Do other things...
+    }
+}
+
+4、超时定时器中断
+#include "mbed.h"
+ 
+// A class for flip()-ing a DigitalOut 
+class Flipper {
+public:
+    Flipper(PinName pin) : _pin(pin) {
+        _pin = 0;
+    }
+    void flip() {
+        _pin = !_pin;
+    }
+private:
+    DigitalOut _pin;
+};
+ 
+DigitalOut led1(LED1);
+Flipper f(LED2);
+Timeout t;
+ 
+int main() {
+    // the address of the object, member function, and interval
+    t.attach(callback(&f, &Flipper::flip), 2.0); 
+ 
+    // spin in a main loop. flipper will interrupt it to call flip
+    while(1) {
+        led1 = !led1;
+        wait(0.2);
+    }
+}
+            
+
+5、通用定时器中断
+
+ // Count the time to toggle a LED
+ 
+ #include "mbed.h"
+ 
+ Timer timer;
+ DigitalOut led(LED1);
+ int begin, end;
+ 
+ int main() {
+     timer.start();
+     begin = timer.read_us();
+     led = !led;
+     end = timer.read_us();
+     printf("Toggle the led takes %d us", end - begin);
+ }
+
+6、外部中断附加事件
+需加载mbed-os
+
+#include "mbed.h"
+#include "mbed_events.h"
+
+DigitalOut led1(LED1);
+InterruptIn sw(SW2);
+EventQueue queue(32 * EVENTS_EVENT_SIZE);
+Thread t;
+
+void rise_handler(void) {
+    // Toggle LED
+    led1 = !led1;
+}
+
+void fall_handler(void) {
+    printf("fall_handler in context %p\r\n", Thread::gettid());
+    // Toggle LED
+    led1 = !led1;
+}
+
+int main() {
+    // Start the event queue
+    t.start(callback(&queue, &EventQueue::dispatch_forever));
+    printf("Starting in context %p\r\n", Thread::gettid());
+    // The 'rise' handler will execute in IRQ context
+    sw.rise(rise_handler);
+    // The 'fall' handler will execute in the context of thread 't'
+    sw.fall(queue.event(fall_handler));
+}
+
+
+7、线程间信号量的传递
+需加载mbed-os
+
+#include "mbed.h"
+ 
+Thread thread;
+DigitalOut led(LED1);
+ 
+void led_thread() {
+    while (true) {
+        // Signal flags that are reported as event are automatically cleared.
+        Thread::signal_wait(0x1);
+        led = !led;
+    }
+}
+ 
+int main (void) {
+    thread.start(callback(led_thread));
+ 
+    while (true) {
+        wait(1);
+        thread.signal_set(0x1);
+    }
+}
+
+*/