Nikollao Sulollari / Mbed 2 deprecated Fast_LIA_final

The project is a fast lock in amplifier (LIA) which can update its output at rate of 1000 measurements/s. It performs digital dual mixing and filtering to obtain a DC value proportional to the AC input signal.

Dependencies:   N5110 mbed

main.cpp@4:2264789de7b2, 2017-09-22 (annotated)

Committer:
Nikollao
Date:
Fri Sep 22 09:18:46 2017 +0000
Revision:
4:2264789de7b2
Parent:
3:dd4eb355f8d9 
publish project;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Nikollao 0:4e20939af8bb 1 #include "main.h"
Nikollao 0:4e20939af8bb 2
Nikollao 0:4e20939af8bb 3 int main()
Nikollao 0:4e20939af8bb 4 {
Nikollao 2:c9b24787d5e1 5 lcd_intro();
Nikollao 2:c9b24787d5e1 6 calibrateJoystick(); ///calibrate joystick
Nikollao 2:c9b24787d5e1 7 settings_menu();
Nikollao 3:dd4eb355f8d9 8 lcd.clear();
Nikollao 0:4e20939af8bb 9 dref.rise(&voltageRise); /// set interrupt to calculate reference frequency
Nikollao 0:4e20939af8bb 10 setupK64Fclocks();
Nikollao 2:c9b24787d5e1 11 //settings_menu();
Nikollao 0:4e20939af8bb 12 /// initialise DAC output dac0_out
Nikollao 0:4e20939af8bb 13 while (ref_freq < 1e2) {
Nikollao 0:4e20939af8bb 14 sleep();
Nikollao 0:4e20939af8bb 15 }
Nikollao 3:dd4eb355f8d9 16 double freq_check = ref_freq*0.001;
Nikollao 3:dd4eb355f8d9 17 double out_speed = 2*var_speed;
Nikollao 3:dd4eb355f8d9 18
Nikollao 3:dd4eb355f8d9 19 if (freq_check < out_speed) {
Nikollao 3:dd4eb355f8d9 20 lcd.printString("RefFreq Low",0,0);
Nikollao 3:dd4eb355f8d9 21 lcd.printString("OR: ",0,1);
Nikollao 3:dd4eb355f8d9 22 lcd.printString("AnOut too Fast",0,2);
Nikollao 3:dd4eb355f8d9 23
Nikollao 3:dd4eb355f8d9 24 while (freq_check < out_speed) {
Nikollao 3:dd4eb355f8d9 25 sleep();
Nikollao 3:dd4eb355f8d9 26 }
Nikollao 3:dd4eb355f8d9 27 }
Nikollao 0:4e20939af8bb 28 /// make sure frequency is read before we go to the program
Nikollao 0:4e20939af8bb 29 /// cancel event-triggered rise interrupt, not to interfere with program
Nikollao 0:4e20939af8bb 30 dref.rise(NULL);
Nikollao 0:4e20939af8bb 31 pc.printf("Ref_Freq is:%.2f kHz\n\r",ref_freq*0.001);
Nikollao 3:dd4eb355f8d9 32 lcd.clear();
Nikollao 3:dd4eb355f8d9 33 char refFreq_char[20]; ///create an array of chars
Nikollao 3:dd4eb355f8d9 34 sprintf(refFreq_char,"%.3f",ref_freq); ///create string
Nikollao 3:dd4eb355f8d9 35
Nikollao 3:dd4eb355f8d9 36 lcd.printString("Ref Freq: ",0,0);
Nikollao 3:dd4eb355f8d9 37 lcd.printString(refFreq_char,35,1);
Nikollao 1:bf693859586c 38 /// constant 6 for correct sampling time
Nikollao 1:bf693859586c 39 /// compensates for delay caused by computations
Nikollao 0:4e20939af8bb 40 sample_freq = 6*samples16*ref_freq;
Nikollao 0:4e20939af8bb 41 sample_time = 1/sample_freq;
Nikollao 0:4e20939af8bb 42
Nikollao 0:4e20939af8bb 43 initDAC();
Nikollao 0:4e20939af8bb 44 delay_freq = ref_freq*amp_points;
Nikollao 0:4e20939af8bb 45 amplitude_delay = 1/delay_freq;
Nikollao 3:dd4eb355f8d9 46
Nikollao 3:dd4eb355f8d9 47 wait(1);
Nikollao 3:dd4eb355f8d9 48 lcd.clear();
Nikollao 3:dd4eb355f8d9 49 lcd.printString("LIA ",0,0);
Nikollao 3:dd4eb355f8d9 50 lcd.printString("In process...",0,1);
Nikollao 3:dd4eb355f8d9 51 lcd.refresh();
Nikollao 1:bf693859586c 52 /// find the offset of the signal
Nikollao 0:4e20939af8bb 53 offset_ticker.attach(&offset_isr,0.001);
Nikollao 3:dd4eb355f8d9 54
Nikollao 3:dd4eb355f8d9 55 double update_value = 0.0;
Nikollao 3:dd4eb355f8d9 56
Nikollao 0:4e20939af8bb 57 while (offset == 0) {
Nikollao 0:4e20939af8bb 58 if (g_offset_flag == 1) {
Nikollao 0:4e20939af8bb 59 g_offset_flag = 0;
Nikollao 0:4e20939af8bb 60 offset = mavg_filter(filter_points);
Nikollao 0:4e20939af8bb 61 }
Nikollao 0:4e20939af8bb 62 sleep();
Nikollao 0:4e20939af8bb 63 }
Nikollao 0:4e20939af8bb 64 offset_ticker.detach();
Nikollao 1:bf693859586c 65 /// once the offset is calculated detach the offset ticker
Nikollao 3:dd4eb355f8d9 66 /// attach the output ticker to update every x ms
Nikollao 3:dd4eb355f8d9 67 update_value = var_speed*0.001;
Nikollao 3:dd4eb355f8d9 68 output_ticker.attach(&output_isr,update_value);
Nikollao 0:4e20939af8bb 69
Nikollao 0:4e20939af8bb 70 while (true) {
Nikollao 0:4e20939af8bb 71 // gpo = !gpo;
Nikollao 1:bf693859586c 72 digitalMix(offset); /// perform digital mixing
Nikollao 1:bf693859586c 73 while (g_output_flag == 0) {sleep();} /// sleep until flag is set
Nikollao 1:bf693859586c 74 /// update output
Nikollao 0:4e20939af8bb 75 if (g_output_flag == 1) {
Nikollao 0:4e20939af8bb 76 g_output_flag = 0;
Nikollao 0:4e20939af8bb 77 //aout = max(samples16);
Nikollao 3:dd4eb355f8d9 78 aout = var_gain*max(samples16);
Nikollao 1:bf693859586c 79 /// DC output by taking the maximum value of the mixed signal (R)
Nikollao 0:4e20939af8bb 80 }
Nikollao 0:4e20939af8bb 81 }
Nikollao 0:4e20939af8bb 82 }
Nikollao 0:4e20939af8bb 83
Nikollao 0:4e20939af8bb 84 double max(int points)
Nikollao 0:4e20939af8bb 85 {
Nikollao 0:4e20939af8bb 86 double amp = 0;
Nikollao 0:4e20939af8bb 87
Nikollao 0:4e20939af8bb 88 for (int i = 0; i < points; i++) {
Nikollao 0:4e20939af8bb 89 if (amp < R[i])
Nikollao 1:bf693859586c 90 amp = R[i]; /// find max of R
Nikollao 0:4e20939af8bb 91 //wait(amplitude_delay);
Nikollao 0:4e20939af8bb 92 }
Nikollao 0:4e20939af8bb 93 return amp;
Nikollao 0:4e20939af8bb 94 }
Nikollao 0:4e20939af8bb 95
Nikollao 0:4e20939af8bb 96 double mavg_filter(int filt_points)
Nikollao 0:4e20939af8bb 97 {
Nikollao 0:4e20939af8bb 98 double avg = 0, signal = 0;
Nikollao 2:c9b24787d5e1 99 //double delay = 0.9/(1*ref_freq*filter_points);
Nikollao 0:4e20939af8bb 100 for (int i = 0; i < filter_points; i++) {
Nikollao 0:4e20939af8bb 101 signal = ain.read();
Nikollao 0:4e20939af8bb 102 avg = avg + signal;
Nikollao 0:4e20939af8bb 103 wait((float)(5e-5));
Nikollao 0:4e20939af8bb 104 }
Nikollao 1:bf693859586c 105 avg = avg/filter_points; /// find offset of input signal
Nikollao 0:4e20939af8bb 106 return avg;
Nikollao 0:4e20939af8bb 107 }
Nikollao 0:4e20939af8bb 108
Nikollao 0:4e20939af8bb 109 void digitalMix(double remove_offset) {
Nikollao 0:4e20939af8bb 110 /// perform mixing of input and reference signals
Nikollao 0:4e20939af8bb 111 double input = 0;
Nikollao 0:4e20939af8bb 112 for (int i = 0; i < samples16;i++) {
Nikollao 0:4e20939af8bb 113 /// remove the offset before doing the multiplication of signals
Nikollao 0:4e20939af8bb 114 input = ain.read()-remove_offset;
Nikollao 0:4e20939af8bb 115 /// find the X component by multiplying with sine 17 values array
Nikollao 0:4e20939af8bb 116 double refX = input*sin_array16[i];
Nikollao 0:4e20939af8bb 117 /// find the Y component by multiplying with cosine 17 values array
Nikollao 0:4e20939af8bb 118 double refY = input*cos_array16[i];
Nikollao 0:4e20939af8bb 119 //double XY = exp(2*log(refX))+exp(2*log(refY));
Nikollao 0:4e20939af8bb 120 double XY = (refX*refX)+(refY*refY); /// R square
Nikollao 0:4e20939af8bb 121 //double R = exp(0.5*log(XY))/4;
Nikollao 0:4e20939af8bb 122 R[i] = pow(XY,0.5); /// R
Nikollao 0:4e20939af8bb 123 //aout = (1+sin_array16[i])/4;
Nikollao 0:4e20939af8bb 124 //aout = R[i]/2;
Nikollao 0:4e20939af8bb 125 wait(sample_time); /// sample time
Nikollao 0:4e20939af8bb 126 }
Nikollao 0:4e20939af8bb 127 }
Nikollao 0:4e20939af8bb 128
Nikollao 0:4e20939af8bb 129 void voltageRise() {
Nikollao 0:4e20939af8bb 130 if (g_counter == 1) {
Nikollao 0:4e20939af8bb 131 /// first time function is called is the first rise
Nikollao 0:4e20939af8bb 132 /// start timer
Nikollao 0:4e20939af8bb 133 period_timer.start();
Nikollao 0:4e20939af8bb 134 /// increase counter so next time function is called we calculate freq.
Nikollao 0:4e20939af8bb 135 g_counter++;
Nikollao 0:4e20939af8bb 136 }
Nikollao 0:4e20939af8bb 137 else if (g_counter == 2) {
Nikollao 0:4e20939af8bb 138 /// second time function is called is the second rise
Nikollao 0:4e20939af8bb 139 /// stop timer
Nikollao 0:4e20939af8bb 140 period_timer.stop();
Nikollao 0:4e20939af8bb 141 /// calculate the time taken between the two rises to find period
Nikollao 0:4e20939af8bb 142 ref_period = period_timer.read();
Nikollao 0:4e20939af8bb 143 /// frequency is the inverse of the signal period
Nikollao 0:4e20939af8bb 144 ref_freq = 1/ref_period;
Nikollao 0:4e20939af8bb 145 /// reset timer
Nikollao 0:4e20939af8bb 146 period_timer.reset();
Nikollao 0:4e20939af8bb 147 /// increase counter because we only want to calculate once per cycle
Nikollao 0:4e20939af8bb 148 /// if we want to actively track the ref_freq we should decrease counter
Nikollao 0:4e20939af8bb 149 g_counter++;
Nikollao 0:4e20939af8bb 150 }
Nikollao 0:4e20939af8bb 151 }
Nikollao 0:4e20939af8bb 152
Nikollao 0:4e20939af8bb 153 void setupK64Fclocks() {
Nikollao 0:4e20939af8bb 154 if(1) {
Nikollao 0:4e20939af8bb 155 uint32_t div1=0,div2=0,busClk=0,adcClk=0;
Nikollao 0:4e20939af8bb 156 SystemCoreClockUpdate();
Nikollao 0:4e20939af8bb 157 pc.printf("SystemCoreClock= %u \r\n",SystemCoreClock);
Nikollao 0:4e20939af8bb 158 /// System Core Clock: 120 MHz
Nikollao 0:4e20939af8bb 159 div1=( (SIM->CLKDIV1) & SIM_CLKDIV1_OUTDIV1_MASK)>>SIM_CLKDIV1_OUTDIV1_SHIFT;
Nikollao 0:4e20939af8bb 160 div1=1+div1;
Nikollao 0:4e20939af8bb 161 div2=1+( (SIM->CLKDIV1) & SIM_CLKDIV1_OUTDIV2_MASK)>>SIM_CLKDIV1_OUTDIV2_SHIFT;
Nikollao 0:4e20939af8bb 162 busClk=SystemCoreClock*div1/div2;
Nikollao 0:4e20939af8bb 163 pc.printf("Divider1== %u div2=%u \r\n",div1,div2);
Nikollao 0:4e20939af8bb 164 pc.printf("MCGOUTCLK= %u, busClk = %u \r\n",SystemCoreClock*div1,busClk);
Nikollao 0:4e20939af8bb 165 /// MCGOUTCLK 120 MHz, Bus Clock = 120 MHz
Nikollao 1:bf693859586c 166 ADC1->SC3 &= ~ADC_SC3_AVGE_MASK;//disable averages
Nikollao 1:bf693859586c 167 ADC1->CFG1 &= ~ADC_CFG1_ADLPC_MASK;//high-power mode
Nikollao 1:bf693859586c 168 ADC1->CFG1 &= ~0x0063 ; //clears ADICLK and ADIV
Nikollao 1:bf693859586c 169 ADC1->CFG1 |= ADC_CFG1_ADIV(2); //divide clock 0=/1, 1=/2, 2=/4, 3=/8
Nikollao 0:4e20939af8bb 170 //ADC0->SC3 |= 0x0007;//enable 32 averages
Nikollao 0:4e20939af8bb 171
Nikollao 1:bf693859586c 172 if (((ADC1->CFG1)& 0x03) == 0) adcClk = busClk/(0x01<<(((ADC1->CFG1)&0x60)>>5));
Nikollao 1:bf693859586c 173 if (((ADC1->SC3)& 0x04) != 0) adcClk = adcClk/(0x01<<(((ADC1->SC3)&0x03)+2));
Nikollao 0:4e20939af8bb 174 pc.printf("adcCLK= %u \r\n",adcClk);
Nikollao 0:4e20939af8bb 175 /// ADC Clock: 60 MHz
Nikollao 0:4e20939af8bb 176 }
Nikollao 0:4e20939af8bb 177 }
Nikollao 0:4e20939af8bb 178
Nikollao 0:4e20939af8bb 179 void offset_isr() {
Nikollao 0:4e20939af8bb 180 g_offset_flag = 1;
Nikollao 0:4e20939af8bb 181 }
Nikollao 0:4e20939af8bb 182
Nikollao 0:4e20939af8bb 183 void output_isr() {
Nikollao 0:4e20939af8bb 184 g_output_flag = 1;
Nikollao 0:4e20939af8bb 185 }
Nikollao 0:4e20939af8bb 186
Nikollao 0:4e20939af8bb 187 void initDAC() {
Nikollao 0:4e20939af8bb 188 DAC0->C0 = 0;
Nikollao 0:4e20939af8bb 189 DAC0->C1 = 0; //reset DAC state
Nikollao 0:4e20939af8bb 190 DAC0->C0 = DAC_C0_DACEN_MASK | DAC_C0_DACSWTRG_MASK| DAC_C0_DACRFS_MASK;
Nikollao 0:4e20939af8bb 191 }
Nikollao 2:c9b24787d5e1 192 void lcd_intro()
Nikollao 2:c9b24787d5e1 193 {
Nikollao 3:dd4eb355f8d9 194 pc.baud(115200);
Nikollao 3:dd4eb355f8d9 195 joyButton.rise(&joyButton_isr); ///assign rise with ISR
Nikollao 3:dd4eb355f8d9 196 joyButton.mode(PullDown); ///use PullDown mode
Nikollao 3:dd4eb355f8d9 197 swButton.rise(&swButton_isr); ///assign rise with ISR
Nikollao 3:dd4eb355f8d9 198 swButton.mode(PullDown); ///use PullDown mode
Nikollao 2:c9b24787d5e1 199 lcd.init();
Nikollao 2:c9b24787d5e1 200 lcd.setBrightness(0.7); // put LED backlight on 50%
Nikollao 2:c9b24787d5e1 201 lcd.printString("THE CIRCUIT IS",1,1);
Nikollao 2:c9b24787d5e1 202 lcd.printString("A FAST LIA!",7,3);
Nikollao 2:c9b24787d5e1 203 lcd.refresh();
Nikollao 2:c9b24787d5e1 204 Timeout timeout;
Nikollao 2:c9b24787d5e1 205 timeout.attach(&timeout_isr,3);
Nikollao 2:c9b24787d5e1 206 sleep();
Nikollao 2:c9b24787d5e1 207 lcd.clear();
Nikollao 2:c9b24787d5e1 208 }
Nikollao 2:c9b24787d5e1 209
Nikollao 2:c9b24787d5e1 210 void settings_menu()
Nikollao 2:c9b24787d5e1 211 {
Nikollao 2:c9b24787d5e1 212 lcd.setBrightness(0.7); // put LED backlight on 50%
Nikollao 2:c9b24787d5e1 213 menu_ticker.attach(&menu_isr,0.2);
Nikollao 2:c9b24787d5e1 214
Nikollao 2:c9b24787d5e1 215 while (exit_menu == 0) {
Nikollao 2:c9b24787d5e1 216 if (g_menu_flag == 1) {
Nikollao 2:c9b24787d5e1 217 g_menu_flag = 0;
Nikollao 2:c9b24787d5e1 218
Nikollao 2:c9b24787d5e1 219 updateJoystick();
Nikollao 3:dd4eb355f8d9 220 init_LIA_menu();
Nikollao 3:dd4eb355f8d9 221 setup_selector();
Nikollao 3:dd4eb355f8d9 222
Nikollao 3:dd4eb355f8d9 223 lcd.refresh();
Nikollao 3:dd4eb355f8d9 224
Nikollao 3:dd4eb355f8d9 225
Nikollao 3:dd4eb355f8d9 226 }
Nikollao 3:dd4eb355f8d9 227 sleep();
Nikollao 3:dd4eb355f8d9 228 }
Nikollao 3:dd4eb355f8d9 229 menu_ticker.detach();
Nikollao 3:dd4eb355f8d9 230 }
Nikollao 3:dd4eb355f8d9 231
Nikollao 3:dd4eb355f8d9 232 void init_LIA_menu() {
Nikollao 3:dd4eb355f8d9 233 lcd.clear();
Nikollao 2:c9b24787d5e1 234
Nikollao 2:c9b24787d5e1 235 lcd.printString("Settings:",0,0);
Nikollao 2:c9b24787d5e1 236
Nikollao 2:c9b24787d5e1 237 char gain_char[20]; ///create an array of chars
Nikollao 3:dd4eb355f8d9 238
Nikollao 3:dd4eb355f8d9 239 sprintf(gain_char,"%.2f",var_gain); ///create string
Nikollao 2:c9b24787d5e1 240
Nikollao 2:c9b24787d5e1 241 char speed_char[20]; ///create an array of chars
Nikollao 3:dd4eb355f8d9 242 sprintf(speed_char,"%.2f",var_speed); ///create string
Nikollao 2:c9b24787d5e1 243
Nikollao 3:dd4eb355f8d9 244 lcd.printString("Gain: ",0,1);
Nikollao 3:dd4eb355f8d9 245 lcd.printString(gain_char,35,2);
Nikollao 3:dd4eb355f8d9 246 lcd.printString("Speed (ms)",0,3);
Nikollao 3:dd4eb355f8d9 247 lcd.printString(speed_char,35,4);
Nikollao 3:dd4eb355f8d9 248 lcd.printString("Confirm",0,5);
Nikollao 3:dd4eb355f8d9 249 }
Nikollao 3:dd4eb355f8d9 250
Nikollao 3:dd4eb355f8d9 251 void setup_selector()
Nikollao 3:dd4eb355f8d9 252 {
Nikollao 3:dd4eb355f8d9 253 switch (joystick.direction) { ///check the direction of joystick
Nikollao 3:dd4eb355f8d9 254 case UP:
Nikollao 3:dd4eb355f8d9 255 menu_option--;
Nikollao 3:dd4eb355f8d9 256 break;
Nikollao 3:dd4eb355f8d9 257 case DOWN:
Nikollao 3:dd4eb355f8d9 258 menu_option++;
Nikollao 3:dd4eb355f8d9 259 break;
Nikollao 3:dd4eb355f8d9 260 case RIGHT:
Nikollao 3:dd4eb355f8d9 261 switch (menu_option) {
Nikollao 3:dd4eb355f8d9 262 case 0:
Nikollao 3:dd4eb355f8d9 263 var_gain += 0.1;
Nikollao 3:dd4eb355f8d9 264 if (var_gain > 3)
Nikollao 3:dd4eb355f8d9 265 var_gain = 0.1;
Nikollao 3:dd4eb355f8d9 266 break;
Nikollao 3:dd4eb355f8d9 267 case 1:
Nikollao 3:dd4eb355f8d9 268 var_speed++;
Nikollao 3:dd4eb355f8d9 269 if (var_speed > 10)
Nikollao 3:dd4eb355f8d9 270 var_speed = 1;
Nikollao 3:dd4eb355f8d9 271 break;
Nikollao 3:dd4eb355f8d9 272 }
Nikollao 3:dd4eb355f8d9 273 break;
Nikollao 3:dd4eb355f8d9 274 case LEFT:
Nikollao 3:dd4eb355f8d9 275 switch (menu_option) {
Nikollao 3:dd4eb355f8d9 276 case 0:
Nikollao 3:dd4eb355f8d9 277 var_gain -= 0.1;
Nikollao 3:dd4eb355f8d9 278 if (var_gain < 0.1)
Nikollao 3:dd4eb355f8d9 279 var_gain = 3;
Nikollao 3:dd4eb355f8d9 280 break;
Nikollao 3:dd4eb355f8d9 281 case 1:
Nikollao 3:dd4eb355f8d9 282 var_speed--;
Nikollao 3:dd4eb355f8d9 283 if (var_speed < 1)
Nikollao 3:dd4eb355f8d9 284 var_speed = 10;
Nikollao 3:dd4eb355f8d9 285 break;
Nikollao 3:dd4eb355f8d9 286 }
Nikollao 3:dd4eb355f8d9 287 break;
Nikollao 3:dd4eb355f8d9 288 }
Nikollao 3:dd4eb355f8d9 289 if (menu_option < 0) { /// if the last (down) option is set for selection and user presses joystick down, selector moves at the top
Nikollao 3:dd4eb355f8d9 290 menu_option = 2;
Nikollao 3:dd4eb355f8d9 291 }
Nikollao 3:dd4eb355f8d9 292 if (menu_option > 2) { /// if the first (up) option is set for selection and user presses joystick up, selector moves at the bottom
Nikollao 3:dd4eb355f8d9 293 menu_option = 0;
Nikollao 3:dd4eb355f8d9 294 }
Nikollao 3:dd4eb355f8d9 295
Nikollao 3:dd4eb355f8d9 296 if (menu_option == 0) { ///selection in menu depends on the value of int option
Nikollao 3:dd4eb355f8d9 297 lcd.drawCircle(75,10,3,1);
Nikollao 3:dd4eb355f8d9 298 } else if (menu_option == 1) {
Nikollao 3:dd4eb355f8d9 299 lcd.drawCircle(75,27,3,1);
Nikollao 3:dd4eb355f8d9 300 } else if (menu_option == 2) {
Nikollao 3:dd4eb355f8d9 301 lcd.drawCircle(55,43,3,1);
Nikollao 3:dd4eb355f8d9 302 if (g_joyButton_flag == 1) {
Nikollao 3:dd4eb355f8d9 303 g_joyButton_flag = 0;
Nikollao 3:dd4eb355f8d9 304 confirmationJoyButton();
Nikollao 2:c9b24787d5e1 305 }
Nikollao 3:dd4eb355f8d9 306 }
Nikollao 3:dd4eb355f8d9 307 g_joyButton_flag = 0;
Nikollao 3:dd4eb355f8d9 308 }
Nikollao 3:dd4eb355f8d9 309
Nikollao 3:dd4eb355f8d9 310 void confirmationJoyButton () {
Nikollao 3:dd4eb355f8d9 311
Nikollao 3:dd4eb355f8d9 312 bool confirm = 1;
Nikollao 3:dd4eb355f8d9 313 while (confirm) {
Nikollao 3:dd4eb355f8d9 314 lcd.clear();
Nikollao 3:dd4eb355f8d9 315 lcd.printString("Continue ?",0,0);
Nikollao 3:dd4eb355f8d9 316 lcd.printString("Yes",0,2);
Nikollao 3:dd4eb355f8d9 317 lcd.printString("No",0,3);
Nikollao 3:dd4eb355f8d9 318 updateJoystick();
Nikollao 3:dd4eb355f8d9 319 switch (joystick.direction) { ///check the direction of joystick
Nikollao 3:dd4eb355f8d9 320 case UP:
Nikollao 3:dd4eb355f8d9 321 save_option--;
Nikollao 3:dd4eb355f8d9 322 break;
Nikollao 3:dd4eb355f8d9 323 case DOWN:
Nikollao 3:dd4eb355f8d9 324 save_option++;
Nikollao 3:dd4eb355f8d9 325 break;
Nikollao 3:dd4eb355f8d9 326 }
Nikollao 3:dd4eb355f8d9 327
Nikollao 3:dd4eb355f8d9 328 if (save_option < 0) { /// if the last (down) option is set for selection and user presses joystick down, selector moves at the top
Nikollao 3:dd4eb355f8d9 329 save_option = 1;
Nikollao 3:dd4eb355f8d9 330 }
Nikollao 3:dd4eb355f8d9 331 if (save_option > 1) { /// if the first (up) option is set for selection and user presses joystick up, selector moves at the bottom
Nikollao 3:dd4eb355f8d9 332 save_option = 0;
Nikollao 3:dd4eb355f8d9 333 }
Nikollao 3:dd4eb355f8d9 334
Nikollao 3:dd4eb355f8d9 335 if (save_option == 0) {
Nikollao 3:dd4eb355f8d9 336 lcd.drawCircle(30,19,3,1);
Nikollao 3:dd4eb355f8d9 337 }
Nikollao 3:dd4eb355f8d9 338 else if (save_option == 1) {
Nikollao 3:dd4eb355f8d9 339 lcd.drawCircle(30,28,3,1);
Nikollao 3:dd4eb355f8d9 340 }
Nikollao 3:dd4eb355f8d9 341 if (g_swButton_flag == 1) {
Nikollao 3:dd4eb355f8d9 342 g_swButton_flag = 0;
Nikollao 3:dd4eb355f8d9 343 if (save_option == 0) {
Nikollao 3:dd4eb355f8d9 344 confirm = 0; // exit continue
Nikollao 3:dd4eb355f8d9 345 exit_menu = 1; // exit menu
Nikollao 3:dd4eb355f8d9 346 }
Nikollao 3:dd4eb355f8d9 347 else if (save_option == 1) {
Nikollao 3:dd4eb355f8d9 348 confirm = 0; // just exit continue
Nikollao 3:dd4eb355f8d9 349 }
Nikollao 3:dd4eb355f8d9 350 }
Nikollao 3:dd4eb355f8d9 351 lcd.refresh();
Nikollao 2:c9b24787d5e1 352 sleep();
Nikollao 2:c9b24787d5e1 353 }
Nikollao 2:c9b24787d5e1 354 }
Nikollao 2:c9b24787d5e1 355
Nikollao 2:c9b24787d5e1 356 void menu_isr() {
Nikollao 2:c9b24787d5e1 357 g_menu_flag = 1;
Nikollao 2:c9b24787d5e1 358 }
Nikollao 2:c9b24787d5e1 359
Nikollao 2:c9b24787d5e1 360 void timeout_isr() {}
Nikollao 2:c9b24787d5e1 361
Nikollao 3:dd4eb355f8d9 362 void joyButton_isr() {
Nikollao 3:dd4eb355f8d9 363 g_joyButton_flag = 1;
Nikollao 3:dd4eb355f8d9 364 }
Nikollao 3:dd4eb355f8d9 365
Nikollao 3:dd4eb355f8d9 366
Nikollao 3:dd4eb355f8d9 367 void swButton_isr() {
Nikollao 3:dd4eb355f8d9 368 g_swButton_flag = 1;
Nikollao 3:dd4eb355f8d9 369 }
Nikollao 3:dd4eb355f8d9 370
Nikollao 2:c9b24787d5e1 371 void calibrateJoystick()
Nikollao 2:c9b24787d5e1 372 {
Nikollao 2:c9b24787d5e1 373 // must not move during calibration
Nikollao 2:c9b24787d5e1 374 joystick.x0 = xPot; // initial positions in the range 0.0 to 1.0 (0.5 if centred exactly)
Nikollao 2:c9b24787d5e1 375 joystick.y0 = yPot;
Nikollao 2:c9b24787d5e1 376 }
Nikollao 2:c9b24787d5e1 377
Nikollao 2:c9b24787d5e1 378 void updateJoystick()
Nikollao 2:c9b24787d5e1 379 {
Nikollao 2:c9b24787d5e1 380 // read current joystick values relative to calibrated values (in range -0.5 to 0.5, 0.0 is centred)
Nikollao 2:c9b24787d5e1 381 joystick.x = xPot - joystick.x0;
Nikollao 2:c9b24787d5e1 382 joystick.y = yPot - joystick.y0;
Nikollao 2:c9b24787d5e1 383 // read button state
Nikollao 3:dd4eb355f8d9 384 joystick.button = joyButton;
Nikollao 2:c9b24787d5e1 385
Nikollao 2:c9b24787d5e1 386 // calculate direction depending on x,y values
Nikollao 2:c9b24787d5e1 387 // tolerance allows a little lee-way in case joystick not exactly in the stated direction
Nikollao 2:c9b24787d5e1 388 if ( fabs(joystick.y) < DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
Nikollao 2:c9b24787d5e1 389 joystick.direction = CENTRE;
Nikollao 2:c9b24787d5e1 390 } else if ( joystick.y > DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
Nikollao 2:c9b24787d5e1 391 joystick.direction = UP;
Nikollao 2:c9b24787d5e1 392 } else if ( joystick.y < DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
Nikollao 2:c9b24787d5e1 393 joystick.direction = DOWN;
Nikollao 2:c9b24787d5e1 394 } else if ( joystick.x > DIRECTION_TOLERANCE && fabs(joystick.y) < DIRECTION_TOLERANCE) {
Nikollao 3:dd4eb355f8d9 395 joystick.direction = LEFT;
Nikollao 2:c9b24787d5e1 396 } else if ( joystick.x < DIRECTION_TOLERANCE && fabs(joystick.y) < DIRECTION_TOLERANCE) {
Nikollao 3:dd4eb355f8d9 397 joystick.direction = RIGHT;
Nikollao 3:dd4eb355f8d9 398 }/*
Nikollao 3:dd4eb355f8d9 399 else if (joystick.y > DIRECTION_TOLERANCE && joystick.x < DIRECTION_TOLERANCE) {
Nikollao 2:c9b24787d5e1 400 joystick.direction = UP_LEFT;
Nikollao 2:c9b24787d5e1 401 } else if (joystick.y > DIRECTION_TOLERANCE && joystick.x > DIRECTION_TOLERANCE) {
Nikollao 2:c9b24787d5e1 402 joystick.direction = UP_RIGHT;
Nikollao 2:c9b24787d5e1 403 } else if (joystick.y < DIRECTION_TOLERANCE && joystick.x < DIRECTION_TOLERANCE) {
Nikollao 2:c9b24787d5e1 404 joystick.direction = DOWN_LEFT;
Nikollao 2:c9b24787d5e1 405 } else if (joystick.y < DIRECTION_TOLERANCE && joystick.x > DIRECTION_TOLERANCE) {
Nikollao 2:c9b24787d5e1 406 joystick.direction = DOWN_RIGHT;
Nikollao 3:dd4eb355f8d9 407 }
Nikollao 3:dd4eb355f8d9 408 */
Nikollao 2:c9b24787d5e1 409 }