Mike Moore
/
RTOS_HW_04
RTOS homework 4
main.cpp@11:e764ed79553a, 2013-08-18 (annotated)
- Committer:
- gatedClock
- Date:
- Sun Aug 18 17:40:11 2013 +0000
- Revision:
- 11:e764ed79553a
- Parent:
- 10:4f2fa66cc430
- Child:
- 12:fab8e658ae76
BPM increase debounce looks ok.
Who changed what in which revision?
User | Revision | Line number | New 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 | 7:562f136c7681 | 40 | |
gatedClock | 0:1013288b8e43 | 41 | #define METROMAX 800 // max. beats per minute. |
gatedClock | 0:1013288b8e43 | 42 | #define METROMIN 8 // min. beats per minute. |
gatedClock | 0:1013288b8e43 | 43 | #define UDSAMPLERATE 0.1 // how often to sample U/D joystick. |
gatedClock | 0:1013288b8e43 | 44 | #define LCDSAMPLERATE 0.1 // how often to redraw the LCD. |
gatedClock | 0:1013288b8e43 | 45 | #define PULSELENGTH 0.0625 // how long the LED-on-time is. |
gatedClock | 10:4f2fa66cc430 | 46 | #define DEBOUNCE 0.16 // debounce pause duration in S. |
gatedClock | 0:1013288b8e43 | 47 | //--global_definitions--------------------------//------------------------------ |
gatedClock | 0:1013288b8e43 | 48 | //--global_variables----------------------------//------------------------------ |
gatedClock | 0:1013288b8e43 | 49 | float fMetroDelay; // time between ticks, in seconds. |
gatedClock | 0:1013288b8e43 | 50 | float fMetroDuty; // duration of metro high, in seconds. |
gatedClock | 0:1013288b8e43 | 51 | int dMetroBPM; // master parameter. |
gatedClock | 0:1013288b8e43 | 52 | long lUpDownHowMany; // count how long up/down joystick pressed. |
gatedClock | 9:ea97a69b9b93 | 53 | char cMutex; // debounce mutex. |
gatedClock | 0:1013288b8e43 | 54 | //--global_instances----------------------------//------------------------------ |
gatedClock | 0:1013288b8e43 | 55 | C12832_LCD lcd; // LCD object. |
gatedClock | 0:1013288b8e43 | 56 | |
gatedClock | 7:562f136c7681 | 57 | InterruptIn iJoyStickUp (p15); // joystick up rising edge. |
gatedClock | 7:562f136c7681 | 58 | InterruptIn iJoyStickDown (p12); // joystick down rising edge. |
gatedClock | 7:562f136c7681 | 59 | InterruptIn iJoyStickLeft (p13); // joystick left rising edge. |
gatedClock | 7:562f136c7681 | 60 | InterruptIn iJoyStickRight (p16); // joystick right rising edge. |
gatedClock | 7:562f136c7681 | 61 | InterruptIn iJoyStickCenter(p14); // 1 if joystick middle pressed. |
gatedClock | 3:8ff0c9c853be | 62 | |
gatedClock | 8:95f4f470ae28 | 63 | DigitalIn dJoyStickUp (p15); // joystick up sample. |
gatedClock | 8:95f4f470ae28 | 64 | DigitalIn dJoyStickDown (p12); // joystick down sample. |
gatedClock | 8:95f4f470ae28 | 65 | DigitalIn dJoyStickLeft (p13); // joystick left sample. |
gatedClock | 8:95f4f470ae28 | 66 | DigitalIn dJoyStickRight (p16); // joystick right sample. |
gatedClock | 8:95f4f470ae28 | 67 | DigitalIn dJoyStickCenter(p14); // joystick center sample. |
gatedClock | 0:1013288b8e43 | 68 | |
gatedClock | 0:1013288b8e43 | 69 | DigitalOut led3(LED1); // leftmost LED. |
gatedClock | 0:1013288b8e43 | 70 | |
gatedClock | 0:1013288b8e43 | 71 | Ticker tickerMetronome; // blinking LED. |
gatedClock | 0:1013288b8e43 | 72 | Ticker tickerJoystickUD; // joystick up/down sample. |
gatedClock | 0:1013288b8e43 | 73 | Ticker tickerLCD; // display ticker. |
gatedClock | 0:1013288b8e43 | 74 | Timeout timeoutDutyCycle; // LED duty cycle delay. |
gatedClock | 0:1013288b8e43 | 75 | //-------prototypes-----------------------------//------------------------------ |
gatedClock | 0:1013288b8e43 | 76 | void initialization(); // initialize settings. |
gatedClock | 0:1013288b8e43 | 77 | void lcd_display(); // display on LCD. |
gatedClock | 0:1013288b8e43 | 78 | void interrupt_service_M(); // metronome tick. |
gatedClock | 0:1013288b8e43 | 79 | void interrupt_service_UD(); // joystick up/down sample. |
gatedClock | 0:1013288b8e43 | 80 | void led3_off(); // attachable LED control. |
gatedClock | 0:1013288b8e43 | 81 | void led3_on(); // attachable LED control. |
gatedClock | 1:5f41e2df0e85 | 82 | void ISR_up(); |
gatedClock | 1:5f41e2df0e85 | 83 | void ISR_down(); |
gatedClock | 10:4f2fa66cc430 | 84 | void ISR_right_rising(); |
gatedClock | 10:4f2fa66cc430 | 85 | void ISR_right_falling(); |
gatedClock | 11:e764ed79553a | 86 | void ISR_left_rising(); |
gatedClock | 11:e764ed79553a | 87 | void ISR_left_falling(); |
gatedClock | 1:5f41e2df0e85 | 88 | void ISR_center(); |
gatedClock | 0:1013288b8e43 | 89 | //==============================================//============================== |
gatedClock | 0:1013288b8e43 | 90 | int main(void) |
gatedClock | 0:1013288b8e43 | 91 | { |
gatedClock | 3:8ff0c9c853be | 92 | iJoyStickUp.rise(&ISR_up); |
gatedClock | 5:faa6d8a04501 | 93 | iJoyStickDown.rise(&ISR_down); |
gatedClock | 11:e764ed79553a | 94 | |
gatedClock | 11:e764ed79553a | 95 | iJoyStickLeft.rise(&ISR_left_rising); |
gatedClock | 11:e764ed79553a | 96 | iJoyStickLeft.fall(&ISR_left_falling); |
gatedClock | 10:4f2fa66cc430 | 97 | |
gatedClock | 10:4f2fa66cc430 | 98 | iJoyStickRight.rise(&ISR_right_rising); |
gatedClock | 10:4f2fa66cc430 | 99 | iJoyStickRight.fall(&ISR_right_falling); |
gatedClock | 10:4f2fa66cc430 | 100 | |
gatedClock | 5:faa6d8a04501 | 101 | iJoyStickCenter.rise(&ISR_center); |
gatedClock | 6:bb5f989e3425 | 102 | |
gatedClock | 6:bb5f989e3425 | 103 | initialization(); |
gatedClock | 6:bb5f989e3425 | 104 | |
gatedClock | 6:bb5f989e3425 | 105 | // metronome ticker. |
gatedClock | 6:bb5f989e3425 | 106 | tickerMetronome.attach(&interrupt_service_M,fMetroDelay); |
gatedClock | 6:bb5f989e3425 | 107 | |
gatedClock | 6:bb5f989e3425 | 108 | // LCD ticker. |
gatedClock | 6:bb5f989e3425 | 109 | tickerLCD.attach(&lcd_display,LCDSAMPLERATE); |
gatedClock | 6:bb5f989e3425 | 110 | |
gatedClock | 6:bb5f989e3425 | 111 | while(1) |
gatedClock | 6:bb5f989e3425 | 112 | { |
gatedClock | 6:bb5f989e3425 | 113 | |
gatedClock | 6:bb5f989e3425 | 114 | wait(10.0); |
gatedClock | 6:bb5f989e3425 | 115 | } |
gatedClock | 2:1a3acbc4d799 | 116 | |
gatedClock | 0:1013288b8e43 | 117 | } |
gatedClock | 0:1013288b8e43 | 118 | /*----------------------------------------------//----------------------------*/ |
gatedClock | 0:1013288b8e43 | 119 | void initialization(void) // program initializations. |
gatedClock | 0:1013288b8e43 | 120 | { |
gatedClock | 0:1013288b8e43 | 121 | dMetroBPM = 60; // initialize to 60BPM. |
gatedClock | 0:1013288b8e43 | 122 | fMetroDelay = 60.0 / (float) (dMetroBPM); |
gatedClock | 0:1013288b8e43 | 123 | fMetroDuty = PULSELENGTH; // initialize LED on-duration. |
gatedClock | 0:1013288b8e43 | 124 | lUpDownHowMany = 0; |
gatedClock | 9:ea97a69b9b93 | 125 | cMutex = 1; |
gatedClock | 0:1013288b8e43 | 126 | } |
gatedClock | 0:1013288b8e43 | 127 | /*----------------------------------------------//----------------------------*/ |
gatedClock | 11:e764ed79553a | 128 | void ISR_left_rising(void) // increase BPM. |
gatedClock | 1:5f41e2df0e85 | 129 | { |
gatedClock | 11:e764ed79553a | 130 | __disable_irq(); |
gatedClock | 11:e764ed79553a | 131 | |
gatedClock | 11:e764ed79553a | 132 | dMetroBPM++; // increase BPM. |
gatedClock | 11:e764ed79553a | 133 | |
gatedClock | 11:e764ed79553a | 134 | wait(DEBOUNCE); // debounce time. |
gatedClock | 11:e764ed79553a | 135 | |
gatedClock | 11:e764ed79553a | 136 | __enable_irq(); |
gatedClock | 4:67d958cc00e8 | 137 | |
gatedClock | 9:ea97a69b9b93 | 138 | // saturate metronome BPM. |
gatedClock | 11:e764ed79553a | 139 | if (dMetroBPM > METROMAX) dMetroBPM = METROMAX; |
gatedClock | 11:e764ed79553a | 140 | if (dMetroBPM < METROMIN) dMetroBPM = METROMIN; |
gatedClock | 1:5f41e2df0e85 | 141 | } |
gatedClock | 1:5f41e2df0e85 | 142 | /*----------------------------------------------//----------------------------*/ |
gatedClock | 11:e764ed79553a | 143 | void ISR_left_falling(void) // ignore rising after falling edge. |
gatedClock | 11:e764ed79553a | 144 | { |
gatedClock | 11:e764ed79553a | 145 | __disable_irq(); |
gatedClock | 11:e764ed79553a | 146 | |
gatedClock | 11:e764ed79553a | 147 | wait(DEBOUNCE); // debounce time. |
gatedClock | 11:e764ed79553a | 148 | |
gatedClock | 11:e764ed79553a | 149 | __enable_irq(); |
gatedClock | 11:e764ed79553a | 150 | } |
gatedClock | 11:e764ed79553a | 151 | /*----------------------------------------------//----------------------------*/ |
gatedClock | 11:e764ed79553a | 152 | |
gatedClock | 10:4f2fa66cc430 | 153 | void ISR_right_rising(void) // decrease BPM. |
gatedClock | 4:67d958cc00e8 | 154 | { |
gatedClock | 10:4f2fa66cc430 | 155 | __disable_irq(); |
gatedClock | 10:4f2fa66cc430 | 156 | |
gatedClock | 10:4f2fa66cc430 | 157 | dMetroBPM--; // decrease BPM. |
gatedClock | 4:67d958cc00e8 | 158 | |
gatedClock | 10:4f2fa66cc430 | 159 | wait(DEBOUNCE); // debounce time. |
gatedClock | 9:ea97a69b9b93 | 160 | |
gatedClock | 10:4f2fa66cc430 | 161 | __enable_irq(); |
gatedClock | 11:e764ed79553a | 162 | // saturate metronome BPM. |
gatedClock | 11:e764ed79553a | 163 | if (dMetroBPM > METROMAX) dMetroBPM = METROMAX; |
gatedClock | 11:e764ed79553a | 164 | if (dMetroBPM < METROMIN) dMetroBPM = METROMIN; |
gatedClock | 10:4f2fa66cc430 | 165 | } |
gatedClock | 10:4f2fa66cc430 | 166 | /*----------------------------------------------//----------------------------*/ |
gatedClock | 10:4f2fa66cc430 | 167 | void ISR_right_falling(void) // ignore rising after falling edge. |
gatedClock | 10:4f2fa66cc430 | 168 | { |
gatedClock | 10:4f2fa66cc430 | 169 | __disable_irq(); |
gatedClock | 10:4f2fa66cc430 | 170 | |
gatedClock | 10:4f2fa66cc430 | 171 | wait(DEBOUNCE); // debounce time. |
gatedClock | 10:4f2fa66cc430 | 172 | |
gatedClock | 10:4f2fa66cc430 | 173 | __enable_irq(); |
gatedClock | 4:67d958cc00e8 | 174 | } |
gatedClock | 4:67d958cc00e8 | 175 | /*----------------------------------------------//----------------------------*/ |
gatedClock | 4:67d958cc00e8 | 176 | void ISR_up(void) |
gatedClock | 1:5f41e2df0e85 | 177 | { |
gatedClock | 1:5f41e2df0e85 | 178 | } |
gatedClock | 1:5f41e2df0e85 | 179 | /*----------------------------------------------//----------------------------*/ |
gatedClock | 4:67d958cc00e8 | 180 | void ISR_down(void) |
gatedClock | 1:5f41e2df0e85 | 181 | { |
gatedClock | 1:5f41e2df0e85 | 182 | } |
gatedClock | 1:5f41e2df0e85 | 183 | /*----------------------------------------------//----------------------------*/ |
gatedClock | 3:8ff0c9c853be | 184 | void ISR_center(void) // set BPM = 60. |
gatedClock | 1:5f41e2df0e85 | 185 | { |
gatedClock | 8:95f4f470ae28 | 186 | dMetroBPM = 60; |
gatedClock | 4:67d958cc00e8 | 187 | |
gatedClock | 1:5f41e2df0e85 | 188 | } |
gatedClock | 1:5f41e2df0e85 | 189 | /*----------------------------------------------//----------------------------*/ |
gatedClock | 0:1013288b8e43 | 190 | void lcd_display(void) // display metronome info. |
gatedClock | 0:1013288b8e43 | 191 | { |
gatedClock | 0:1013288b8e43 | 192 | lcd.cls(); // clear display. |
gatedClock | 0:1013288b8e43 | 193 | |
gatedClock | 0:1013288b8e43 | 194 | LCD1; // line 1. |
gatedClock | 0:1013288b8e43 | 195 | lcd.printf(" METRONOME"); |
gatedClock | 0:1013288b8e43 | 196 | |
gatedClock | 0:1013288b8e43 | 197 | LCD2; // line 2. |
gatedClock | 0:1013288b8e43 | 198 | |
gatedClock | 0:1013288b8e43 | 199 | if (dMetroBPM == METROMIN) // BPM, with saturation notification. |
gatedClock | 0:1013288b8e43 | 200 | lcd.printf(" %5.2d BPM minimum",dMetroBPM); |
gatedClock | 0:1013288b8e43 | 201 | else |
gatedClock | 0:1013288b8e43 | 202 | if (dMetroBPM == METROMAX) |
gatedClock | 0:1013288b8e43 | 203 | lcd.printf(" %5.2d BPM maximum",dMetroBPM); |
gatedClock | 0:1013288b8e43 | 204 | else |
gatedClock | 0:1013288b8e43 | 205 | lcd.printf(" %5.2d BPM",dMetroBPM); |
gatedClock | 0:1013288b8e43 | 206 | |
gatedClock | 0:1013288b8e43 | 207 | LCD3; // line 3. |
gatedClock | 0:1013288b8e43 | 208 | |
gatedClock | 8:95f4f470ae28 | 209 | lcd.printf(" RTOS HW 4"); |
gatedClock | 0:1013288b8e43 | 210 | } |
gatedClock | 0:1013288b8e43 | 211 | /*----------------------------------------------//----------------------------*/ |
gatedClock | 0:1013288b8e43 | 212 | // this metronome tick ISR will self-adjust to the current user-selected |
gatedClock | 0:1013288b8e43 | 213 | // metronome rate. that has to be done here, and at the start of the function, |
gatedClock | 0:1013288b8e43 | 214 | // in order to maintain a constant phase and to prevent a beat-skip. |
gatedClock | 0:1013288b8e43 | 215 | |
gatedClock | 0:1013288b8e43 | 216 | void interrupt_service_M() // metronome tick. |
gatedClock | 0:1013288b8e43 | 217 | { |
gatedClock | 0:1013288b8e43 | 218 | tickerMetronome.detach(); // only one attachment. |
gatedClock | 0:1013288b8e43 | 219 | tickerMetronome.attach(&interrupt_service_M,fMetroDelay); |
gatedClock | 0:1013288b8e43 | 220 | led3 = 1; |
gatedClock | 0:1013288b8e43 | 221 | timeoutDutyCycle.attach(&led3_off,fMetroDuty); |
gatedClock | 0:1013288b8e43 | 222 | } |
gatedClock | 0:1013288b8e43 | 223 | /*----------------------------------------------//----------------------------*/ |
gatedClock | 0:1013288b8e43 | 224 | // this routine measures the number of seconds for which the joystick is |
gatedClock | 0:1013288b8e43 | 225 | // in the up or down position. for three ranges of time, three different |
gatedClock | 0:1013288b8e43 | 226 | // BPM rates-of-change are used. This means that as the user controls the |
gatedClock | 0:1013288b8e43 | 227 | // metronome rate using the joystick, at first it will change slowly, then |
gatedClock | 0:1013288b8e43 | 228 | // it will change at a moderate speed, then it will change quickly. |
gatedClock | 0:1013288b8e43 | 229 | // additionally, pressing the center joystick button will bring the metronome |
gatedClock | 0:1013288b8e43 | 230 | // back to 60BPM immediately, breaking BPM phase continuity. |
gatedClock | 0:1013288b8e43 | 231 | void interrupt_service_UD(void) // joystick up/down sample |
gatedClock | 0:1013288b8e43 | 232 | { |
gatedClock | 0:1013288b8e43 | 233 | int dPressedSeconds; // how many seconds joystick pressed. |
gatedClock | 0:1013288b8e43 | 234 | int dMultiCount; // slow count rate. |
gatedClock | 0:1013288b8e43 | 235 | char cDiscontinuity; // 1 = break phase & change BPM now. |
gatedClock | 0:1013288b8e43 | 236 | |
gatedClock | 0:1013288b8e43 | 237 | cDiscontinuity = 0; // don't break phase. |
gatedClock | 0:1013288b8e43 | 238 | |
gatedClock | 0:1013288b8e43 | 239 | // calculate slow rate period. |
gatedClock | 0:1013288b8e43 | 240 | dMultiCount = (int) ((float) (1.0 / ((float) UDSAMPLERATE))); |
gatedClock | 0:1013288b8e43 | 241 | |
gatedClock | 3:8ff0c9c853be | 242 | if (dJoyStickUp) // joystick up. |
gatedClock | 0:1013288b8e43 | 243 | { |
gatedClock | 0:1013288b8e43 | 244 | // rate-range calculations. |
gatedClock | 0:1013288b8e43 | 245 | dPressedSeconds = (int) (((float) lUpDownHowMany) * UDSAMPLERATE); |
gatedClock | 0:1013288b8e43 | 246 | if (dPressedSeconds < 5) {if (!(lUpDownHowMany % dMultiCount)) dMetroBPM ++;} |
gatedClock | 0:1013288b8e43 | 247 | else |
gatedClock | 0:1013288b8e43 | 248 | if (dPressedSeconds < 10) dMetroBPM++; |
gatedClock | 0:1013288b8e43 | 249 | else dMetroBPM += 5; |
gatedClock | 0:1013288b8e43 | 250 | lUpDownHowMany++; // joystick holddown time. |
gatedClock | 0:1013288b8e43 | 251 | } |
gatedClock | 0:1013288b8e43 | 252 | else |
gatedClock | 3:8ff0c9c853be | 253 | if (dJoyStickDown) // joystick down. |
gatedClock | 0:1013288b8e43 | 254 | { |
gatedClock | 0:1013288b8e43 | 255 | // rate-range calculations. |
gatedClock | 0:1013288b8e43 | 256 | dPressedSeconds = (int) (((float) lUpDownHowMany) * UDSAMPLERATE); |
gatedClock | 0:1013288b8e43 | 257 | if (dPressedSeconds < 5) {if (!(lUpDownHowMany % dMultiCount)) dMetroBPM --;} |
gatedClock | 0:1013288b8e43 | 258 | else |
gatedClock | 0:1013288b8e43 | 259 | if (dPressedSeconds < 10) dMetroBPM--; |
gatedClock | 0:1013288b8e43 | 260 | else dMetroBPM -= 5; |
gatedClock | 0:1013288b8e43 | 261 | lUpDownHowMany++; // joystick holddown time. |
gatedClock | 0:1013288b8e43 | 262 | } |
gatedClock | 0:1013288b8e43 | 263 | else lUpDownHowMany = 0; // clear when not up or down. |
gatedClock | 0:1013288b8e43 | 264 | |
gatedClock | 3:8ff0c9c853be | 265 | if (dJoyStickCenter) |
gatedClock | 0:1013288b8e43 | 266 | { |
gatedClock | 0:1013288b8e43 | 267 | dMetroBPM = 60; // center-button -> 60BPM. |
gatedClock | 0:1013288b8e43 | 268 | cDiscontinuity = 1; // pending phase-break. |
gatedClock | 0:1013288b8e43 | 269 | } |
gatedClock | 0:1013288b8e43 | 270 | // saturate metronome BPM. |
gatedClock | 0:1013288b8e43 | 271 | if (dMetroBPM > METROMAX) dMetroBPM = METROMAX; |
gatedClock | 0:1013288b8e43 | 272 | if (dMetroBPM < METROMIN) dMetroBPM = METROMIN; |
gatedClock | 0:1013288b8e43 | 273 | |
gatedClock | 0:1013288b8e43 | 274 | fMetroDelay = 60.0 / (float) (dMetroBPM); // calculate Ticker delay time. |
gatedClock | 0:1013288b8e43 | 275 | |
gatedClock | 0:1013288b8e43 | 276 | if (cDiscontinuity) // implement 60BPS now. |
gatedClock | 0:1013288b8e43 | 277 | { |
gatedClock | 0:1013288b8e43 | 278 | tickerMetronome.detach(); // only one attachment. |
gatedClock | 0:1013288b8e43 | 279 | tickerMetronome.attach(&interrupt_service_M,fMetroDelay); |
gatedClock | 0:1013288b8e43 | 280 | } |
gatedClock | 0:1013288b8e43 | 281 | |
gatedClock | 0:1013288b8e43 | 282 | } |
gatedClock | 0:1013288b8e43 | 283 | /*----------------------------------------------//----------------------------*/ |
gatedClock | 0:1013288b8e43 | 284 | void led3_off(void) {led3 = 0;} // turn off the LED. |
gatedClock | 0:1013288b8e43 | 285 | /*----------------------------------------------//----------------------------*/ |
gatedClock | 0:1013288b8e43 | 286 | void led3_on( void) {led3 = 1;} // turn on the led. |
gatedClock | 0:1013288b8e43 | 287 | /*----------------------------------------------//----------------------------*/ |