Mike Moore / Mbed 2 deprecated RTOS_HW_04

RTOS homework 4

Dependencies:   C12832_lcd mbed

main.cpp@3:8ff0c9c853be, 2013-08-18 (annotated)

Committer:
gatedClock
Date:
Sun Aug 18 15:38:00 2013 +0000
Revision:
3:8ff0c9c853be
Parent:
2:1a3acbc4d799
Child:
4:67d958cc00e8
in progress.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
gatedClock 0:1013288b8e43 1 /*----------------------------------------------//------------------------------
gatedClock 0:1013288b8e43 2 student : m-moore
gatedClock 0:1013288b8e43 3 class : rtos
gatedClock 1:5f41e2df0e85 4 directory : RTOS_HW_04
gatedClock 0:1013288b8e43 5 file : main.cpp
gatedClock 0:1013288b8e43 6 ----description---------------------------------//------------------------------
gatedClock 0:1013288b8e43 7 Joystick-Controlled Metronome
gatedClock 0:1013288b8e43 8
gatedClock 0:1013288b8e43 9 features:
gatedClock 0:1013288b8e43 10 1. post-initialization functionality all timer-driven.
gatedClock 0:1013288b8e43 11 2. IRSs contain no blocking functions.
gatedClock 0:1013288b8e43 12 3. LED shows the metronome beat.
gatedClock 0:1013288b8e43 13 4. metronome speed controlled with up/down joystick.
gatedClock 0:1013288b8e43 14 5. rate-of-speed-change depends on how long the up/down has been active.
gatedClock 0:1013288b8e43 15 6. Beat-Per-Minute (BPM) shown on LCD display.
gatedClock 0:1013288b8e43 16
gatedClock 0:1013288b8e43 17 controls:
gatedClock 0:1013288b8e43 18 1. joystick-up - increase metronome rate.
gatedClock 0:1013288b8e43 19 2. joystick-down - decrease metronome rate.
gatedClock 0:1013288b8e43 20 3. joystick-center - set metronome to 60BPM.
gatedClock 0:1013288b8e43 21
gatedClock 0:1013288b8e43 22 notes:
gatedClock 0:1013288b8e43 23
gatedClock 0:1013288b8e43 24 testing:
gatedClock 0:1013288b8e43 25 1. confirm ease of being able to adjust one BPM rate with joystick up/down.
gatedClock 0:1013288b8e43 26 2. confirm three joystick up/down change rates, if keeping the stick pressed.
gatedClock 0:1013288b8e43 27 3. confirm max/min BPS saturation & display.
gatedClock 0:1013288b8e43 28 4. confirm joystick up/down control works to change display & LED BPM.
gatedClock 0:1013288b8e43 29 5. confirm joystick center-press sets rate to 60BPM immediately.
gatedClock 0:1013288b8e43 30 6. confirm long-test does not result in a crash.
gatedClock 0:1013288b8e43 31 -> all items confirmed.
gatedClock 0:1013288b8e43 32
gatedClock 0:1013288b8e43 33 -----includes-----------------------------------//----------------------------*/
gatedClock 0:1013288b8e43 34 #include "mbed.h" // mbed class.
gatedClock 0:1013288b8e43 35 #include "C12832_lcd.h" // LCD class.
gatedClock 0:1013288b8e43 36 //---defines------------------------------------//------------------------------
gatedClock 0:1013288b8e43 37 #define LCD1 lcd.locate(0, 0); // LCD line 1.
gatedClock 0:1013288b8e43 38 #define LCD2 lcd.locate(0,11); // LCD line 2.
gatedClock 0:1013288b8e43 39 #define LCD3 lcd.locate(0,22); // LCD line 3.
gatedClock 0:1013288b8e43 40
gatedClock 2:1a3acbc4d799 41 #define JOYUP p15
gatedClock 2:1a3acbc4d799 42 #define JOYDOWN p12
gatedClock 2:1a3acbc4d799 43 #define JOYLEFT p13
gatedClock 2:1a3acbc4d799 44 #define JOYRIGHT p16
gatedClock 2:1a3acbc4d799 45 #define JOYCENTER p14
gatedClock 2:1a3acbc4d799 46
gatedClock 0:1013288b8e43 47 #define METROMAX 800 // max. beats per minute.
gatedClock 0:1013288b8e43 48 #define METROMIN 8 // min. beats per minute.
gatedClock 0:1013288b8e43 49 #define UDSAMPLERATE 0.1 // how often to sample U/D joystick.
gatedClock 0:1013288b8e43 50 #define LCDSAMPLERATE 0.1 // how often to redraw the LCD.
gatedClock 0:1013288b8e43 51 #define PULSELENGTH 0.0625 // how long the LED-on-time is.
gatedClock 0:1013288b8e43 52 //--global_definitions--------------------------//------------------------------
gatedClock 0:1013288b8e43 53 //--global_variables----------------------------//------------------------------
gatedClock 0:1013288b8e43 54 float fMetroDelay; // time between ticks, in seconds.
gatedClock 0:1013288b8e43 55 float fMetroDuty; // duration of metro high, in seconds.
gatedClock 0:1013288b8e43 56 int dMetroBPM; // master parameter.
gatedClock 0:1013288b8e43 57 long lUpDownHowMany; // count how long up/down joystick pressed.
gatedClock 0:1013288b8e43 58 //--global_instances----------------------------//------------------------------
gatedClock 0:1013288b8e43 59 C12832_LCD lcd; // LCD object.
gatedClock 0:1013288b8e43 60
gatedClock 3:8ff0c9c853be 61 InterruptIn iJoyStickUp (p15); // 1 if joystick up pressed.
gatedClock 3:8ff0c9c853be 62 InterruptIn iJoyStickDown (p12); // 1 if joystick down pressed.
gatedClock 3:8ff0c9c853be 63 InterruptIn iJoyStickLeft (p13);
gatedClock 3:8ff0c9c853be 64 InterruptIn iJoyStickRight (p16);
gatedClock 3:8ff0c9c853be 65 InterruptIn iJoyStickCenter(p14); // 1 if joystick middle pressed.
gatedClock 3:8ff0c9c853be 66
gatedClock 3:8ff0c9c853be 67 DigitalOut dJoyStickUp (p15);
gatedClock 3:8ff0c9c853be 68 DigitalOut dJoyStickDown (p12);
gatedClock 3:8ff0c9c853be 69 DigitalOut dJoyStickLeft (p13);
gatedClock 3:8ff0c9c853be 70 DigitalOut dJoyStickRight (p16);
gatedClock 3:8ff0c9c853be 71 DigitalOut dJoyStickCenter(p14);
gatedClock 0:1013288b8e43 72
gatedClock 0:1013288b8e43 73 DigitalOut led3(LED1); // leftmost LED.
gatedClock 0:1013288b8e43 74
gatedClock 0:1013288b8e43 75 Ticker tickerMetronome; // blinking LED.
gatedClock 0:1013288b8e43 76 Ticker tickerJoystickUD; // joystick up/down sample.
gatedClock 0:1013288b8e43 77 Ticker tickerLCD; // display ticker.
gatedClock 0:1013288b8e43 78 Timeout timeoutDutyCycle; // LED duty cycle delay.
gatedClock 0:1013288b8e43 79 //-------prototypes-----------------------------//------------------------------
gatedClock 0:1013288b8e43 80 void initialization(); // initialize settings.
gatedClock 0:1013288b8e43 81 void lcd_display(); // display on LCD.
gatedClock 0:1013288b8e43 82 void interrupt_service_M(); // metronome tick.
gatedClock 0:1013288b8e43 83 void interrupt_service_UD(); // joystick up/down sample.
gatedClock 0:1013288b8e43 84 void led3_off(); // attachable LED control.
gatedClock 0:1013288b8e43 85 void led3_on(); // attachable LED control.
gatedClock 1:5f41e2df0e85 86 void ISR_up();
gatedClock 1:5f41e2df0e85 87 void ISR_down();
gatedClock 1:5f41e2df0e85 88 void ISR_right();
gatedClock 1:5f41e2df0e85 89 void ISR_left();
gatedClock 1:5f41e2df0e85 90 void ISR_center();
gatedClock 0:1013288b8e43 91 //==============================================//==============================
gatedClock 0:1013288b8e43 92 int main(void)
gatedClock 0:1013288b8e43 93 {
gatedClock 3:8ff0c9c853be 94 iJoyStickUp.rise(&ISR_up);
gatedClock 2:1a3acbc4d799 95
gatedClock 0:1013288b8e43 96 }
gatedClock 0:1013288b8e43 97 /*----------------------------------------------//----------------------------*/
gatedClock 0:1013288b8e43 98 void initialization(void) // program initializations.
gatedClock 0:1013288b8e43 99 {
gatedClock 0:1013288b8e43 100 dMetroBPM = 60; // initialize to 60BPM.
gatedClock 0:1013288b8e43 101 fMetroDelay = 60.0 / (float) (dMetroBPM);
gatedClock 0:1013288b8e43 102 fMetroDuty = PULSELENGTH; // initialize LED on-duration.
gatedClock 0:1013288b8e43 103 lUpDownHowMany = 0;
gatedClock 0:1013288b8e43 104 }
gatedClock 0:1013288b8e43 105 /*----------------------------------------------//----------------------------*/
gatedClock 3:8ff0c9c853be 106 void ISR_up(void) // metronome stop.
gatedClock 1:5f41e2df0e85 107 {
gatedClock 3:8ff0c9c853be 108 int dPressedSeconds; // how many seconds joystick pressed.
gatedClock 3:8ff0c9c853be 109 int dMultiCount; // slow count rate.
gatedClock 3:8ff0c9c853be 110 char cDiscontinuity; // 1 = break phase & change BPM now.
gatedClock 3:8ff0c9c853be 111
gatedClock 3:8ff0c9c853be 112 cDiscontinuity = 0; // don't break phase.
gatedClock 3:8ff0c9c853be 113
gatedClock 3:8ff0c9c853be 114 // calculate slow rate period.
gatedClock 3:8ff0c9c853be 115 dMultiCount = (int) ((float) (1.0 / ((float) UDSAMPLERATE)));
gatedClock 3:8ff0c9c853be 116
gatedClock 3:8ff0c9c853be 117 if (dJoyStickUp) // joystick up.
gatedClock 3:8ff0c9c853be 118 {
gatedClock 3:8ff0c9c853be 119 // rate-range calculations.
gatedClock 3:8ff0c9c853be 120 dPressedSeconds = (int) (((float) lUpDownHowMany) * UDSAMPLERATE);
gatedClock 3:8ff0c9c853be 121 if (dPressedSeconds < 5) {if (!(lUpDownHowMany % dMultiCount)) dMetroBPM ++;}
gatedClock 3:8ff0c9c853be 122 else
gatedClock 3:8ff0c9c853be 123 if (dPressedSeconds < 10) dMetroBPM++;
gatedClock 3:8ff0c9c853be 124 else dMetroBPM += 5;
gatedClock 3:8ff0c9c853be 125 lUpDownHowMany++; // joystick holddown time.
gatedClock 3:8ff0c9c853be 126 }
gatedClock 1:5f41e2df0e85 127 }
gatedClock 1:5f41e2df0e85 128 /*----------------------------------------------//----------------------------*/
gatedClock 3:8ff0c9c853be 129 void ISR_down(void) // metronome START.
gatedClock 1:5f41e2df0e85 130 {
gatedClock 1:5f41e2df0e85 131 }
gatedClock 1:5f41e2df0e85 132 /*----------------------------------------------//----------------------------*/
gatedClock 3:8ff0c9c853be 133 void ISR_left(void) // increase BPM.
gatedClock 1:5f41e2df0e85 134 {
gatedClock 1:5f41e2df0e85 135 }
gatedClock 1:5f41e2df0e85 136 /*----------------------------------------------//----------------------------*/
gatedClock 3:8ff0c9c853be 137 void ISR_right(void) // decrease BPM.
gatedClock 1:5f41e2df0e85 138 {
gatedClock 1:5f41e2df0e85 139 }
gatedClock 1:5f41e2df0e85 140 /*----------------------------------------------//----------------------------*/
gatedClock 3:8ff0c9c853be 141 void ISR_center(void) // set BPM = 60.
gatedClock 1:5f41e2df0e85 142 {
gatedClock 1:5f41e2df0e85 143 }
gatedClock 1:5f41e2df0e85 144 /*----------------------------------------------//----------------------------*/
gatedClock 0:1013288b8e43 145 void lcd_display(void) // display metronome info.
gatedClock 0:1013288b8e43 146 {
gatedClock 0:1013288b8e43 147 lcd.cls(); // clear display.
gatedClock 0:1013288b8e43 148
gatedClock 0:1013288b8e43 149 LCD1; // line 1.
gatedClock 0:1013288b8e43 150 lcd.printf(" METRONOME");
gatedClock 0:1013288b8e43 151
gatedClock 0:1013288b8e43 152 LCD2; // line 2.
gatedClock 0:1013288b8e43 153
gatedClock 0:1013288b8e43 154 if (dMetroBPM == METROMIN) // BPM, with saturation notification.
gatedClock 0:1013288b8e43 155 lcd.printf(" %5.2d BPM minimum",dMetroBPM);
gatedClock 0:1013288b8e43 156 else
gatedClock 0:1013288b8e43 157 if (dMetroBPM == METROMAX)
gatedClock 0:1013288b8e43 158 lcd.printf(" %5.2d BPM maximum",dMetroBPM);
gatedClock 0:1013288b8e43 159 else
gatedClock 0:1013288b8e43 160 lcd.printf(" %5.2d BPM",dMetroBPM);
gatedClock 0:1013288b8e43 161
gatedClock 0:1013288b8e43 162 LCD3; // line 3.
gatedClock 0:1013288b8e43 163
gatedClock 0:1013288b8e43 164 lcd.printf(" RTOS HW 3 PART 1");
gatedClock 0:1013288b8e43 165 }
gatedClock 0:1013288b8e43 166 /*----------------------------------------------//----------------------------*/
gatedClock 0:1013288b8e43 167 // this metronome tick ISR will self-adjust to the current user-selected
gatedClock 0:1013288b8e43 168 // metronome rate. that has to be done here, and at the start of the function,
gatedClock 0:1013288b8e43 169 // in order to maintain a constant phase and to prevent a beat-skip.
gatedClock 0:1013288b8e43 170
gatedClock 0:1013288b8e43 171 void interrupt_service_M() // metronome tick.
gatedClock 0:1013288b8e43 172 {
gatedClock 0:1013288b8e43 173 tickerMetronome.detach(); // only one attachment.
gatedClock 0:1013288b8e43 174 tickerMetronome.attach(&interrupt_service_M,fMetroDelay);
gatedClock 0:1013288b8e43 175 led3 = 1;
gatedClock 0:1013288b8e43 176 timeoutDutyCycle.attach(&led3_off,fMetroDuty);
gatedClock 0:1013288b8e43 177 }
gatedClock 0:1013288b8e43 178 /*----------------------------------------------//----------------------------*/
gatedClock 0:1013288b8e43 179 // this routine measures the number of seconds for which the joystick is
gatedClock 0:1013288b8e43 180 // in the up or down position. for three ranges of time, three different
gatedClock 0:1013288b8e43 181 // BPM rates-of-change are used. This means that as the user controls the
gatedClock 0:1013288b8e43 182 // metronome rate using the joystick, at first it will change slowly, then
gatedClock 0:1013288b8e43 183 // it will change at a moderate speed, then it will change quickly.
gatedClock 0:1013288b8e43 184 // additionally, pressing the center joystick button will bring the metronome
gatedClock 0:1013288b8e43 185 // back to 60BPM immediately, breaking BPM phase continuity.
gatedClock 0:1013288b8e43 186 void interrupt_service_UD(void) // joystick up/down sample
gatedClock 0:1013288b8e43 187 {
gatedClock 0:1013288b8e43 188 int dPressedSeconds; // how many seconds joystick pressed.
gatedClock 0:1013288b8e43 189 int dMultiCount; // slow count rate.
gatedClock 0:1013288b8e43 190 char cDiscontinuity; // 1 = break phase & change BPM now.
gatedClock 0:1013288b8e43 191
gatedClock 0:1013288b8e43 192 cDiscontinuity = 0; // don't break phase.
gatedClock 0:1013288b8e43 193
gatedClock 0:1013288b8e43 194 // calculate slow rate period.
gatedClock 0:1013288b8e43 195 dMultiCount = (int) ((float) (1.0 / ((float) UDSAMPLERATE)));
gatedClock 0:1013288b8e43 196
gatedClock 3:8ff0c9c853be 197 if (dJoyStickUp) // joystick up.
gatedClock 0:1013288b8e43 198 {
gatedClock 0:1013288b8e43 199 // rate-range calculations.
gatedClock 0:1013288b8e43 200 dPressedSeconds = (int) (((float) lUpDownHowMany) * UDSAMPLERATE);
gatedClock 0:1013288b8e43 201 if (dPressedSeconds < 5) {if (!(lUpDownHowMany % dMultiCount)) dMetroBPM ++;}
gatedClock 0:1013288b8e43 202 else
gatedClock 0:1013288b8e43 203 if (dPressedSeconds < 10) dMetroBPM++;
gatedClock 0:1013288b8e43 204 else dMetroBPM += 5;
gatedClock 0:1013288b8e43 205 lUpDownHowMany++; // joystick holddown time.
gatedClock 0:1013288b8e43 206 }
gatedClock 0:1013288b8e43 207 else
gatedClock 3:8ff0c9c853be 208 if (dJoyStickDown) // joystick down.
gatedClock 0:1013288b8e43 209 {
gatedClock 0:1013288b8e43 210 // rate-range calculations.
gatedClock 0:1013288b8e43 211 dPressedSeconds = (int) (((float) lUpDownHowMany) * UDSAMPLERATE);
gatedClock 0:1013288b8e43 212 if (dPressedSeconds < 5) {if (!(lUpDownHowMany % dMultiCount)) dMetroBPM --;}
gatedClock 0:1013288b8e43 213 else
gatedClock 0:1013288b8e43 214 if (dPressedSeconds < 10) dMetroBPM--;
gatedClock 0:1013288b8e43 215 else dMetroBPM -= 5;
gatedClock 0:1013288b8e43 216 lUpDownHowMany++; // joystick holddown time.
gatedClock 0:1013288b8e43 217 }
gatedClock 0:1013288b8e43 218 else lUpDownHowMany = 0; // clear when not up or down.
gatedClock 0:1013288b8e43 219
gatedClock 3:8ff0c9c853be 220 if (dJoyStickCenter)
gatedClock 0:1013288b8e43 221 {
gatedClock 0:1013288b8e43 222 dMetroBPM = 60; // center-button -> 60BPM.
gatedClock 0:1013288b8e43 223 cDiscontinuity = 1; // pending phase-break.
gatedClock 0:1013288b8e43 224 }
gatedClock 0:1013288b8e43 225 // saturate metronome BPM.
gatedClock 0:1013288b8e43 226 if (dMetroBPM > METROMAX) dMetroBPM = METROMAX;
gatedClock 0:1013288b8e43 227 if (dMetroBPM < METROMIN) dMetroBPM = METROMIN;
gatedClock 0:1013288b8e43 228
gatedClock 0:1013288b8e43 229 fMetroDelay = 60.0 / (float) (dMetroBPM); // calculate Ticker delay time.
gatedClock 0:1013288b8e43 230
gatedClock 0:1013288b8e43 231 if (cDiscontinuity) // implement 60BPS now.
gatedClock 0:1013288b8e43 232 {
gatedClock 0:1013288b8e43 233 tickerMetronome.detach(); // only one attachment.
gatedClock 0:1013288b8e43 234 tickerMetronome.attach(&interrupt_service_M,fMetroDelay);
gatedClock 0:1013288b8e43 235 }
gatedClock 0:1013288b8e43 236
gatedClock 0:1013288b8e43 237 }
gatedClock 0:1013288b8e43 238 /*----------------------------------------------//----------------------------*/
gatedClock 0:1013288b8e43 239 void led3_off(void) {led3 = 0;} // turn off the LED.
gatedClock 0:1013288b8e43 240 /*----------------------------------------------//----------------------------*/
gatedClock 0:1013288b8e43 241 void led3_on( void) {led3 = 1;} // turn on the led.
gatedClock 0:1013288b8e43 242 /*----------------------------------------------//----------------------------*/