Revision 0:b8435cfc1bba, committed 2014-04-30

Comitter:

bhakti08

Date:

Wed Apr 30 19:23:22 2014 +0000

Commit message:

The program does the following:; 1. Communication between two serial ports on the MBED; 2. Control ON/OFF of a LED(The pin can be used as direction control of the motor) using the joystick and the serial communication;

Changed in this revision

diff -r 000000000000 -r b8435cfc1bba C12832_lcd.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/C12832_lcd.lib	Wed Apr 30 19:23:22 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/dreschpe/code/C12832_lcd/#468cdccff7af

diff -r 000000000000 -r b8435cfc1bba DebouncedIn.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DebouncedIn.cpp	Wed Apr 30 19:23:22 2014 +0000
@@ -0,0 +1,93 @@
+#include "DebouncedIn.h"
+#include "mbed.h"
+
+/*
+ * Constructor
+ */
+DebouncedIn::DebouncedIn(PinName in) 
+    : _in(in) {    
+        
+    // reset all the flags and counters    
+    _samples = 0;
+    _output = 0;
+    _output_last = 0;
+    _rising_flag = 0;
+    _falling_flag = 0;
+    _state_counter = 0;
+    
+    // Attach ticker
+    _ticker.attach(this, &DebouncedIn::_sample, 0.005);     
+}
+  
+void DebouncedIn::_sample() {
+
+    // take a sample
+    _samples = _samples >> 1; // shift left
+      
+    if (_in) {
+        _samples |= 0x80;
+    }  
+      
+    // examine the sample window, look for steady state
+    if (_samples == 0x00) {
+        _output = 0;
+    } 
+    else if (_samples == 0xFF) {
+        _output = 1;
+    }
+
+
+    // Rising edge detection
+    if ((_output == 1) && (_output_last == 0)) {
+        _rising_flag++;
+        _state_counter = 0;
+    }
+
+    // Falling edge detection
+    else if ((_output == 0) && (_output_last == 1)) {
+        _falling_flag++;
+        _state_counter = 0;
+    }
+    
+    // steady state
+    else {
+        _state_counter++;
+    }
+    
+   // update the output
+    _output_last = _output;
+    
+}
+
+
+
+// return number of rising edges
+int DebouncedIn::rising(void) {
+    int return_value = _rising_flag; 
+    _rising_flag = 0;
+    return(return_value);
+}
+
+// return number of falling edges
+int DebouncedIn::falling(void) {
+    int return_value = _falling_flag; 
+    _falling_flag = 0;
+    return(return_value);
+}
+
+// return number of ticsk we've bene steady for
+int DebouncedIn::steady(void) {
+return(_state_counter);
+}
+
+// return the debounced status
+int DebouncedIn::read(void) {
+    return(_output);
+}
+
+// shorthand for read()
+DebouncedIn::operator int() {
+    return read();
+}
+
+

diff -r 000000000000 -r b8435cfc1bba DebouncedIn.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DebouncedIn.h	Wed Apr 30 19:23:22 2014 +0000
@@ -0,0 +1,31 @@
+#include "mbed.h"
+
+    class DebouncedIn {
+        public:      
+             DebouncedIn(PinName in);
+
+             int read (void);
+             operator int();
+              
+             int rising(void);
+             int falling(void);
+             int steady(void);
+              
+        private :    
+               // objects
+               DigitalIn _in;    
+               Ticker _ticker;
+
+               // function to take a sample, and update flags
+               void _sample(void);
+
+               // counters and flags
+               int _samples;
+               int _output;
+               int _output_last;
+               int _rising_flag;
+               int _falling_flag;
+               int _state_counter;
+
+    };
+    
\ No newline at end of file

diff -r 000000000000 -r b8435cfc1bba main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Apr 30 19:23:22 2014 +0000
@@ -0,0 +1,66 @@
+#include "mbed.h"
+#include "rtos.h"
+#include "C12832_lcd.h"
+#include "DebouncedIn.h"
+
+
+DigitalOut myled(LED1);
+DigitalOut dir_pin(LED4);
+DebouncedIn dir_fwd(p15);
+DebouncedIn dir_rev(p12);
+Serial Wifi_Tx(p9,p10);
+Serial Wifi_Rx(p28,p27);
+Serial pc(USBTX,USBRX);
+C12832_LCD lcd;
+
+bool dir;
+
+void Serial_Tx(void const *args) {
+    while (1){
+        while (pc.readable())
+        {
+            Wifi_Tx.putc(pc.getc());
+        }
+        Thread::wait(1000);
+    }
+}
+
+void Serial_Rx(void const *) {
+    char c;
+    while (1) {
+        while (Wifi_Rx.readable())
+        {
+            c = Wifi_Rx.getc();
+            lcd.printf("%c",c);
+            if (c == 'F')
+                dir = 1;
+            else if (c == 'R')
+                dir = 0;
+        }
+        Thread::wait (10);
+    }
+}
+
+void dir_control(void const *) {
+    while (1) {
+        if ((dir_fwd || dir) && !dir_rev) {
+            dir_pin = 1;
+            dir = 1;
+        }
+        else if (dir_rev || !dir) { 
+            dir_pin = 0;
+            dir = 0;
+        }
+        Thread::wait(10);
+    }
+    
+}
+int main() {
+    Thread serial_tx(Serial_Tx);
+    Thread serial_rx(Serial_Rx);
+    Thread Direction_Control(dir_control);
+    while(1) {
+        myled = !myled;
+        Thread::wait(500);
+    }
+}

diff -r 000000000000 -r b8435cfc1bba mbed-rtos.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-rtos.lib	Wed Apr 30 19:23:22 2014 +0000
@@ -0,0 +1,1 @@
+https://mbed.org/users/mbed_official/code/mbed-rtos/#f88660a9bed1

diff -r 000000000000 -r b8435cfc1bba mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Apr 30 19:23:22 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/8a40adfe8776
\ No newline at end of file