jim hamblen
Student lab skeleton code to test color LCD, 4 pushbuttons, and speaker setup. Moves a robot image on 4G sys LCD.
Dependencies: 4DGL-uLCD-SE PinDetect mbed
Revision 0:343fbeea672c, committed 2015-01-23
- Comitter:
- 4180_1
- Date:
- Fri Jan 23 13:47:32 2015 +0000
- Commit message:
- ver 1.0
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/4DGL-uLCD-SE.lib Fri Jan 23 13:47:32 2015 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/users/4180_1/code/4DGL-uLCD-SE/#e39a44de229a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/PinDetect.lib Fri Jan 23 13:47:32 2015 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/users/AjK/code/PinDetect/#cb3afc45028b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Robot.h Fri Jan 23 13:47:32 2015 +0000
@@ -0,0 +1,28 @@
+class Robot
+{
+public:
+ void draw() {
+//needs code here
+ }
+ void erase() {
+//needs code here
+ }
+ void moveForward(int distance) {
+//needs code here
+ }
+ void moveBackward(int distance) {
+//needs code here
+ }
+ void moveLeft(int distance) {
+//needs code here
+ }
+ void moveRight(int distance) {
+//needs code here
+ }
+//needs code to init x,y
+ Robot() {
+ }
+private:
+ int xPosition;
+ int yPosition;
+};
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Speaker.h Fri Jan 23 13:47:32 2015 +0000
@@ -0,0 +1,19 @@
+#include "mbed.h"
+// new class to play a note on Speaker based on PwmOut class
+class Speaker
+{
+public:
+ Speaker(PinName pin) : _pin(pin) {
+// _pin(pin) means pass pin to the Speaker Constructor
+ }
+// class method to play a note based on PwmOut class
+ void PlayNote(float frequency, float duration, float volume) {
+ _pin.period(1.0/frequency);
+ _pin = volume/2.0;
+ wait(duration);
+ _pin = 0.0;
+ }
+
+private:
+ PwmOut _pin;
+};
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Jan 23 13:47:32 2015 +0000
@@ -0,0 +1,136 @@
+
+#include "mbed.h"
+#include "Speaker.h"
+#include "PinDetect.h"
+#include "uLCD_4DGL.h"
+// setup builtin LEDs
+DigitalOut myLed1(LED1);
+DigitalOut myLed2(LED2);
+DigitalOut myLed3(LED3);
+DigitalOut myLed4(LED4);
+// setup pushbuttons for debounced interrupt use
+PinDetect pb1(p23);
+PinDetect pb2(p24);
+PinDetect pb3(p25);
+PinDetect pb4(p26);
+
+// setup LCD
+uLCD_4DGL uLCD(p28, p27, p29); // create a global lcd object
+
+//moving include down here allows use in uLCD in Robot class draw and erase member functions
+//easier for now than passing a new uLCD_4DGL object argument to the class
+#include "Robot.h"
+
+// setup instance of new Speaker class, mySpeaker using pin 21
+// the pin must be a PWM output pin
+Speaker mySpeaker(p21);
+
+// pushbutton status - need volatile for safe interrupt R/W
+volatile int pbStatus = 0;
+
+// Callback routine is interrupt activated by a debounced pb1 hit
+void pb1_hit_callback (void)
+{
+ // CODE HERE WILL RUN WHEN INTERUPT IS GENERATED
+ pbStatus = pbStatus | 0x01;
+
+}
+// Callback routine is interrupt activated by a debounced pb2 hit
+void pb2_hit_callback (void)
+{
+ // CODE HERE WILL RUN WHEN INTERUPT IS GENERATED
+ pbStatus = pbStatus | 0x02;
+}
+// Callback routine is interrupt activated by a debounced pb3 hit
+void pb3_hit_callback (void)
+{
+ // CODE HERE WILL RUN WHEN INTERUPT IS GENERATED
+ pbStatus = pbStatus | 0x04;
+}
+// Callback routine is interrupt activated by a debounced pb4 hit
+void pb4_hit_callback (void)
+{
+ // CODE HERE WILL RUN WHEN INTERUPT IS GENERATED
+ pbStatus = pbStatus | 0x08;
+}
+
+// main program
+int main()
+{
+ uLCD.printf("\nmyRobot!\nyourname");
+//setup four SPST push buttons
+ pb1.mode(PullUp); //add internal pullup resistor
+ pb2.mode(PullUp);
+ pb3.mode(PullUp);
+ pb4.mode(PullUp);
+ // need a small delay for initial pullup to take effect due to capacitance
+ wait(.01);
+ // Setup Interrupt callback functions for each pb hit
+ pb1.attach_deasserted(&pb1_hit_callback);
+ pb2.attach_deasserted(&pb2_hit_callback);
+ pb3.attach_deasserted(&pb3_hit_callback);
+ pb4.attach_deasserted(&pb4_hit_callback);
+ // Start sampling the pb inputs using interrupts
+ pb1.setSampleFrequency();
+ pb2.setSampleFrequency();
+ pb3.setSampleFrequency();
+ pb4.setSampleFrequency();
+// pushbuttons are all now setup with pullups and running with a software decounce filter
+
+// use your modified robot class to move and display robot's new location on LCD
+ Robot myRobot;
+
+ myRobot.draw(); //initial robot display in center of LCD
+//main loop to control and display robot
+ while(1) {
+ //check pushbutton status for new input
+ switch (pbStatus) {
+ //move forward
+ case 0x01 :
+ myLed1 = 1;
+ pbStatus = 0;
+ mySpeaker.PlayNote(200.0,0.1,0.8);
+ myRobot.erase();
+ myRobot.moveForward(1);
+ myRobot.draw();
+ break;
+ //move backwards
+ case 0x02 :
+ myLed2 = 1;
+ pbStatus = 0;
+ mySpeaker.PlayNote(400.0,0.1,0.8);
+ myRobot.erase();
+ myRobot.moveBackward(1);
+ myRobot.draw();
+ break;
+ //move left
+ case 0x04 :
+ myLed3 = 1;
+ pbStatus = 0;
+ mySpeaker.PlayNote(600.0,0.1,0.8);
+ myRobot.erase();
+ myRobot.moveLeft(1);
+ myRobot.draw();
+ break;
+ //move right
+ case 0x08 :
+ myLed4 = 1;
+ pbStatus = 0;
+ mySpeaker.PlayNote(800.0,0.1,0.8);
+ myRobot.erase();
+ myRobot.moveRight(1);
+ myRobot.draw();
+ break;
+ //no pb or multiple pbs hit
+ default :
+// myLed1 = 0;
+ myLed2 = 0;
+ myLed3 = 0;
+ myLed4 = 0;
+ pbStatus = 0;
+ } //end switch
+ myLed1 = !myLed1; //blink to show loop is still running
+ wait(.05);
+ } //end while
+} //end main
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Fri Jan 23 13:47:32 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/4fc01daae5a5 \ No newline at end of file