Diff: main.cpp

Revision:

0:765cf978c3e5

Child:

1:eb499e2a1b9b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Feb 16 02:32:43 2019 +0000
@@ -0,0 +1,102 @@
+#include "mbed.h"
+
+CAN can1(PD_0, PD_1);
+CAN can2(PB_5, PB_6);
+
+int a = 0;
+int b = 0;
+
+void print_char(char c = '*')
+{
+    printf("%c\r\n", c);
+    fflush(stdout);
+}
+
+Thread thread;
+
+DigitalOut led1(LED1);
+DigitalOut led2(LED2);
+CANMessage  msg;
+
+
+InterruptIn button1(USER_BUTTON);
+volatile bool button1_pressed = false; // Used in the main loop
+volatile bool button1_enabled = true; // Used for debouncing
+Timeout button1_timeout; // Used for debouncing
+
+// Enables button when bouncing is over
+void button1_enabled_cb(void)
+{
+    button1_enabled = true;
+}
+
+// ISR handling button pressed event
+void button1_onpressed_cb(void)
+{
+    if (button1_enabled) { // Disabled while the button is bouncing
+        button1_enabled = false;
+        button1_pressed = true; // To be read by the main loop
+        button1_timeout.attach(callback(button1_enabled_cb), 0.3); // Debounce time 300 ms
+    }
+}
+
+void print_thread()
+{
+    while (true) {
+ #if 1       
+        if(can1.read(msg)) {
+            print_char();
+            printf("got message id=%d 0x%08x\r\n", msg.id, msg.id);
+//            b = *reinterpret_cast<int*>(msg.data);
+            b = msg.data[0];
+            printf("got data %d 0x%08x \r\n", b, b);
+            if(msg.id == 1337) {
+                led2 = !led2;
+ 
+                b = *reinterpret_cast<int*>(msg.data);
+                printf("got message %d\r\n", b);
+                if(b % 5 == 0)
+                    led2 = !led2;
+             }
+        }
+//        wait(0.2);
+#endif
+    }
+}
+
+int main()
+{
+    printf("\n\n*** RTOS basic example ***\n");
+
+    thread.start(print_thread);
+//    can1.reset();
+//    can2.reset();
+//    can1.frequency(100000);
+//    can2.frequency(100000);
+    //button1.mode(PullUp); // Activate pull-up
+    button1.fall(callback(button1_onpressed_cb)); // Attach ISR to handle button press event
+
+    int idx = 0; // Just for printf below
+
+    while(1) {
+        if (button1_pressed) { // Set when button is pressed
+            button1_pressed = false;
+            printf("Button pressed %d\n", idx++);
+            can1.write(CANMessage(1337, reinterpret_cast<char*>(&a), 1));            
+            led1 = !led1;
+            a++;
+        }
+    }
+ #if 0
+    while(1) {
+ //       can1.write(CANMessage(1337, reinterpret_cast<char*>(&a), sizeof(a)));
+#if  
+        can1.write(CANMessage(1337, reinterpret_cast<char*>(&a), 1));
+#endif        
+        printf("loop a=%d\n", a);
+        led1 = !led1;
+        a++;
+        wait(0.2);
+    }
+#endif    
+}