EDP2 / Mbed 2 deprecated EDP2_displa

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Dependencies:   mbed

Fork of EDP2_display by Mmmonicaaaa <3

main.cpp@3:5f89484f8c84, 2018-02-27 (annotated)

Committer:
raduschirila
Date:
Tue Feb 27 13:58:05 2018 +0000
Revision:
3:5f89484f8c84
Parent:
2:281d8c268a8e
Child:
4:82c807b7685e
under construction, normalized wave

Who changed what in which revision?

UserRevisionLine numberNew contents of line
raduschirila 0:850d65a7d593 1 #include "mbed.h"
raduschirila 0:850d65a7d593 2
raduschirila 0:850d65a7d593 3
raduschirila 0:850d65a7d593 4 #define max7219_reg_noop 0x00
raduschirila 0:850d65a7d593 5 #define max7219_reg_digit0 0x01
raduschirila 0:850d65a7d593 6 #define max7219_reg_digit1 0x02
raduschirila 0:850d65a7d593 7 #define max7219_reg_digit2 0x03
raduschirila 0:850d65a7d593 8 #define max7219_reg_digit3 0x04
raduschirila 0:850d65a7d593 9 #define max7219_reg_digit4 0x05
raduschirila 0:850d65a7d593 10 #define max7219_reg_digit5 0x06
raduschirila 0:850d65a7d593 11 #define max7219_reg_digit6 0x07
raduschirila 0:850d65a7d593 12 #define max7219_reg_digit7 0x08
raduschirila 0:850d65a7d593 13 #define max7219_reg_decodeMode 0x09
raduschirila 0:850d65a7d593 14 #define max7219_reg_intensity 0x0a
raduschirila 0:850d65a7d593 15 #define max7219_reg_scanLimit 0x0b
raduschirila 0:850d65a7d593 16 #define max7219_reg_shutdown 0x0c
raduschirila 0:850d65a7d593 17 #define max7219_reg_displayTest 0x0f
raduschirila 0:850d65a7d593 18
raduschirila 0:850d65a7d593 19
raduschirila 0:850d65a7d593 20
raduschirila 0:850d65a7d593 21
raduschirila 2:281d8c268a8e 22 Serial pc(USBTX, USBRX); // tx, rx this is for the data to be sent via the usb port to the computer
raduschirila 0:850d65a7d593 23 Ticker pulse;
raduschirila 0:850d65a7d593 24 AnalogIn pulse_in(PTB0);
raduschirila 0:850d65a7d593 25 AnalogOut o(PTE30);
raduschirila 2:281d8c268a8e 26 DigitalOut led(PTD5);
raduschirila 3:5f89484f8c84 27 float xi,ypast,y,alpha=0.5;//absolute max
raduschirila 3:5f89484f8c84 28 float v[80]; int q=0;
raduschirila 2:281d8c268a8e 29 bool first=true;
raduschirila 3:5f89484f8c84 30
raduschirila 0:850d65a7d593 31 void get_pulse()
raduschirila 0:850d65a7d593 32 {
raduschirila 3:5f89484f8c84 33 if(q==80) q=0;
raduschirila 3:5f89484f8c84 34 xi=(float)pulse_in;
raduschirila 2:281d8c268a8e 35 //noise reduction algorithm
raduschirila 2:281d8c268a8e 36 if(!first)//noise filtering procedure
raduschirila 2:281d8c268a8e 37 {
raduschirila 3:5f89484f8c84 38 y= (alpha*xi)+ ((1-alpha)*ypast);
raduschirila 3:5f89484f8c84 39 ypast=y;
raduschirila 2:281d8c268a8e 40 }
raduschirila 2:281d8c268a8e 41 else
raduschirila 2:281d8c268a8e 42 first=false;
raduschirila 3:5f89484f8c84 43 v[q]=xi;
raduschirila 3:5f89484f8c84 44 o=v[q];
raduschirila 3:5f89484f8c84 45 q++;
raduschirila 0:850d65a7d593 46 }
raduschirila 0:850d65a7d593 47
raduschirila 0:850d65a7d593 48
raduschirila 0:850d65a7d593 49
raduschirila 0:850d65a7d593 50
raduschirila 0:850d65a7d593 51 #define LOW 0
raduschirila 0:850d65a7d593 52 #define HIGH 1
raduschirila 0:850d65a7d593 53
raduschirila 0:850d65a7d593 54 SPI max72_spi(PTD2, NC, PTD1);
raduschirila 0:850d65a7d593 55 DigitalOut load(PTD0); //will provide the load signal
raduschirila 0:850d65a7d593 56
raduschirila 0:850d65a7d593 57
raduschirila 0:850d65a7d593 58 char heart[8] = {0x00,0x36,0x7f,0x7f,0x3e,0x1c,0x08,0x00};
raduschirila 0:850d65a7d593 59
raduschirila 0:850d65a7d593 60
raduschirila 1:82127072abb8 61 //DISPLAY FUNCTIONS DO NOT TOUCH
raduschirila 1:82127072abb8 62
raduschirila 0:850d65a7d593 63 void write_to_max( int reg, int col)
raduschirila 0:850d65a7d593 64 {
raduschirila 0:850d65a7d593 65 load = LOW; // begin
raduschirila 0:850d65a7d593 66 max72_spi.write(reg); // specify register
raduschirila 0:850d65a7d593 67 max72_spi.write(col); // put data
raduschirila 0:850d65a7d593 68 load = HIGH; // make sure data is loaded (on rising edge of LOAD/CS)
raduschirila 0:850d65a7d593 69 }
raduschirila 0:850d65a7d593 70
raduschirila 0:850d65a7d593 71 //writes 8 bytes to the display
raduschirila 0:850d65a7d593 72 void pattern_to_display(char *testdata){
raduschirila 0:850d65a7d593 73 int cdata;
raduschirila 0:850d65a7d593 74 for(int idx = 0; idx <= 7; idx++) {
raduschirila 0:850d65a7d593 75 cdata = testdata[idx];
raduschirila 0:850d65a7d593 76 write_to_max(idx+1,cdata);
raduschirila 0:850d65a7d593 77 }
raduschirila 0:850d65a7d593 78 }
raduschirila 0:850d65a7d593 79
raduschirila 0:850d65a7d593 80
raduschirila 0:850d65a7d593 81 void setup_dot_matrix ()
raduschirila 0:850d65a7d593 82 {
raduschirila 0:850d65a7d593 83 // initiation of the max 7219
raduschirila 0:850d65a7d593 84 // SPI setup: 8 bits, mode 0
raduschirila 0:850d65a7d593 85 max72_spi.format(8, 0);
raduschirila 0:850d65a7d593 86
raduschirila 0:850d65a7d593 87
raduschirila 0:850d65a7d593 88
raduschirila 0:850d65a7d593 89 max72_spi.frequency(100000); //down to 100khx easier to scope ;-)
raduschirila 0:850d65a7d593 90
raduschirila 0:850d65a7d593 91
raduschirila 0:850d65a7d593 92 write_to_max(max7219_reg_scanLimit, 0x07);
raduschirila 0:850d65a7d593 93 write_to_max(max7219_reg_decodeMode, 0x00); // using an led matrix (not digits)
raduschirila 0:850d65a7d593 94 write_to_max(max7219_reg_shutdown, 0x01); // not in shutdown mode
raduschirila 0:850d65a7d593 95 write_to_max(max7219_reg_displayTest, 0x00); // no display test
raduschirila 0:850d65a7d593 96 for (int e=1; e<=8; e++) { // empty registers, turn all LEDs off
raduschirila 0:850d65a7d593 97 write_to_max(e,0);
raduschirila 0:850d65a7d593 98 }
raduschirila 0:850d65a7d593 99 // maxAll(max7219_reg_intensity, 0x0f & 0x0f); // the first 0x0f is the value you can set
raduschirila 0:850d65a7d593 100 write_to_max(max7219_reg_intensity, 0x08);
raduschirila 0:850d65a7d593 101
raduschirila 0:850d65a7d593 102 }
raduschirila 0:850d65a7d593 103
raduschirila 0:850d65a7d593 104 void clear(){
raduschirila 0:850d65a7d593 105 for (int e=1; e<=8; e++) { // empty registers, turn all LEDs off
raduschirila 0:850d65a7d593 106 write_to_max(e,0);
raduschirila 0:850d65a7d593 107 }
raduschirila 0:850d65a7d593 108 }
raduschirila 1:82127072abb8 109
raduschirila 1:82127072abb8 110 //END OF DISPLAY FUNCTIONS
raduschirila 1:82127072abb8 111
raduschirila 3:5f89484f8c84 112 void detect_pulse()
raduschirila 3:5f89484f8c84 113 {
raduschirila 3:5f89484f8c84 114 if(slope(5,25,v[5],v[25])>SOMETHING NEED TESTING and slope(40,50,v[40],v[50])<SOMETHING NEEDS TESTING)
raduschirila 3:5f89484f8c84 115 //then the pulse is where it is supposed to be
raduschirila 3:5f89484f8c84 116 //so out put it with regard to 0
raduschirila 3:5f89484f8c84 117
raduschirila 3:5f89484f8c84 118 }
raduschirila 3:5f89484f8c84 119
raduschirila 3:5f89484f8c84 120 inline float slope(float a1, float a2, float b1, float b2)
raduschirila 3:5f89484f8c84 121 {
raduschirila 3:5f89484f8c84 122 return (float)((b2-b1)/(a2-a1));
raduschirila 3:5f89484f8c84 123 }
raduschirila 3:5f89484f8c84 124
raduschirila 3:5f89484f8c84 125
raduschirila 1:82127072abb8 126 void splash_screen()
raduschirila 0:850d65a7d593 127 {
raduschirila 0:850d65a7d593 128 setup_dot_matrix (); /* setup matric */
raduschirila 0:850d65a7d593 129 pattern_to_display(heart);
raduschirila 0:850d65a7d593 130 wait_ms(1000);
raduschirila 0:850d65a7d593 131 heart[7]=0x01;heart[0]=0x01;
raduschirila 0:850d65a7d593 132 for(int i=1;i<=8;++i)
raduschirila 0:850d65a7d593 133 {
raduschirila 0:850d65a7d593 134 pattern_to_display(heart);
raduschirila 0:850d65a7d593 135 wait(0.2);
raduschirila 0:850d65a7d593 136 heart[7]<<=1;
raduschirila 0:850d65a7d593 137 heart[7]|=1;
raduschirila 0:850d65a7d593 138 heart[0]=heart[7];
raduschirila 0:850d65a7d593 139 }
raduschirila 0:850d65a7d593 140 for(int i=1;i<=6;++i)
raduschirila 0:850d65a7d593 141 {
raduschirila 0:850d65a7d593 142 heart[i]=~heart[i];
raduschirila 0:850d65a7d593 143 }
raduschirila 0:850d65a7d593 144 pattern_to_display(heart);
raduschirila 0:850d65a7d593 145 wait(1.6);
raduschirila 0:850d65a7d593 146 clear();
raduschirila 0:850d65a7d593 147 }
raduschirila 1:82127072abb8 148
raduschirila 3:5f89484f8c84 149
raduschirila 3:5f89484f8c84 150
raduschirila 1:82127072abb8 151 int main()
raduschirila 1:82127072abb8 152 {
raduschirila 2:281d8c268a8e 153 pulse.attach(&get_pulse,0.0125);//attach the interrupt thing so it starts the ISR every 0.0125 s
raduschirila 2:281d8c268a8e 154 splash_screen();//wait for the pulse to be stable by showing stuff on the display so the user is happy knowing he is gay
raduschirila 1:82127072abb8 155 while(1)
raduschirila 1:82127072abb8 156 {
raduschirila 3:5f89484f8c84 157
raduschirila 1:82127072abb8 158 }
raduschirila 1:82127072abb8 159 }