team 2 section 5 (MbedHead) / Mbed 2 deprecated DAC_module

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Dependencies:   TextLCD mbed dacmodule

Fork of DAC_module by n s

main.cpp@1:af51ee0c367d, 2016-11-01 (annotated)

Committer:
psuMbedHead
Date:
Tue Nov 01 18:25:30 2016 +0000
Revision:
1:af51ee0c367d
Parent:
0:c1332385cffa
Child:
2:ee4fdb7b9859
added all/most comments

Who changed what in which revision?

UserRevisionLine numberNew contents of line
psuMbedHead 1:af51ee0c367d 1 #include "mbed.h" //normal library
psuMbedHead 1:af51ee0c367d 2 #include "mcp4725.h" //DAC library
psuMbedHead 1:af51ee0c367d 3 #include "TextLCD.h" //16x2 lcd library
psuMbedHead 1:af51ee0c367d 4 #include "math.h" //math library
psuMbedHead 0:c1332385cffa 5
psuMbedHead 1:af51ee0c367d 6 TextLCD lcd(p14, p13, p21, p22, p23, p24, TextLCD::LCD16x2); //setup for 16x2 lcd (rs, e, d4-d7)
psuMbedHead 1:af51ee0c367d 7 Serial pc(USBTX, USBRX); //serial usb communication setup
psuMbedHead 1:af51ee0c367d 8 AnalogIn analogIn(p15); //used for testing in original code
psuMbedHead 1:af51ee0c367d 9 MCP4725 DAC(p28, p27, MCP4725::Standard100kHz, 0); //init the DAC module
psuMbedHead 0:c1332385cffa 10 //define custom characters
psuMbedHead 1:af51ee0c367d 11 const char sin_char_top[] = { 0x0, 0xe,0x11,0x11, 0x0, 0x0, 0x0, 0x0}; //makes left part of sin wave char
psuMbedHead 1:af51ee0c367d 12 const char sin_char_bot[] = { 0x0, 0x0, 0x0, 0x0,0x11,0x11, 0xe, 0x0}; //makes right part of sin wave char
psuMbedHead 1:af51ee0c367d 13 const char sq_char_left[] = {0x1c, 0x4, 0x4, 0x4, 0x4, 0x4, 0x4, 0x7}; //makes left part of square wav char
psuMbedHead 1:af51ee0c367d 14 const char sq_char_right[] = { 0x7, 0x4, 0x4, 0x4, 0x4, 0x4, 0x4,0x1c}; //makes right part of square wav char
psuMbedHead 1:af51ee0c367d 15 const double pi = 3.14159; //needed constant for sin()
psuMbedHead 0:c1332385cffa 16 int main() {
psuMbedHead 1:af51ee0c367d 17 //set custom characters to empty char spot
psuMbedHead 1:af51ee0c367d 18 lcd.setUDC(0, (char *) sin_char_bot); //set to char 0
psuMbedHead 1:af51ee0c367d 19 lcd.setUDC(1, (char *) sin_char_top); //set to char 1
psuMbedHead 1:af51ee0c367d 20 lcd.setUDC(2, (char *) sq_char_left); //set to char 2
psuMbedHead 1:af51ee0c367d 21 lcd.setUDC(3, (char *) sq_char_right); //set to char 3
psuMbedHead 0:c1332385cffa 22 int RUN = 0; //start = 1, stop = 0
psuMbedHead 0:c1332385cffa 23 int SIGNAL_MODE = 0; //1sin,10ksin,1sq,10ksq = 0,1,2,3
psuMbedHead 0:c1332385cffa 24
psuMbedHead 1:af51ee0c367d 25 while(1) { //start continuous loop
psuMbedHead 1:af51ee0c367d 26 int dots = 0; //for waiting loop
psuMbedHead 0:c1332385cffa 27 while(RUN == 0)
psuMbedHead 0:c1332385cffa 28 {
psuMbedHead 1:af51ee0c367d 29 lcd.setCursor(TextLCD::CurOff_BlkOff); //set cursor to invisible
psuMbedHead 1:af51ee0c367d 30 lcd.setAddress(0, 0); //place cursor at origin
psuMbedHead 1:af51ee0c367d 31 lcd.printf("Waveform: off\n"); //print to lcd that it is in off mode
psuMbedHead 0:c1332385cffa 32 if(dots == 0){
psuMbedHead 0:c1332385cffa 33 lcd.printf("waiting");
psuMbedHead 0:c1332385cffa 34 dots++;
psuMbedHead 0:c1332385cffa 35 }
psuMbedHead 0:c1332385cffa 36 else if(dots == 1){
psuMbedHead 0:c1332385cffa 37 lcd.printf("waiting.");
psuMbedHead 0:c1332385cffa 38 dots++;
psuMbedHead 0:c1332385cffa 39 }
psuMbedHead 0:c1332385cffa 40 else if(dots == 2){
psuMbedHead 0:c1332385cffa 41 lcd.printf("waiting..");
psuMbedHead 0:c1332385cffa 42 dots++;
psuMbedHead 0:c1332385cffa 43 }
psuMbedHead 0:c1332385cffa 44 else if(dots == 3){
psuMbedHead 0:c1332385cffa 45 lcd.printf("waiting...");
psuMbedHead 0:c1332385cffa 46 dots = 0;
psuMbedHead 1:af51ee0c367d 47 } //makes the dots go "." ".." "..." in a loop
psuMbedHead 0:c1332385cffa 48 else{
psuMbedHead 1:af51ee0c367d 49 lcd.printf("ERROR CASE"); //print to show error
psuMbedHead 0:c1332385cffa 50 }
psuMbedHead 1:af51ee0c367d 51 wait_ms(100); //lower frequency loop to cycle dots at 0.1 second interval
psuMbedHead 0:c1332385cffa 52 }
psuMbedHead 1:af51ee0c367d 53 int i = 0; //resets counter when transitioning from stop to start
psuMbedHead 1:af51ee0c367d 54 while(RUN == 1) //waveform is being generated
psuMbedHead 0:c1332385cffa 55 {
psuMbedHead 0:c1332385cffa 56 //set display on
psuMbedHead 1:af51ee0c367d 57 lcd.setCursor(TextLCD::CurOff_BlkOff); //set cursor to invisible
psuMbedHead 1:af51ee0c367d 58 lcd.setAddress(0, 0); //place cursor at origin
psuMbedHead 1:af51ee0c367d 59 lcd.printf("Waveform: on\n"); //print that the waveform is on
psuMbedHead 0:c1332385cffa 60
psuMbedHead 0:c1332385cffa 61 if(SIGNAL_MODE == 0){
psuMbedHead 0:c1332385cffa 62 //sin wave 1Hz or 1s
psuMbedHead 0:c1332385cffa 63 lcd.putc(0); lcd.putc(1); lcd.printf("1Hz Sin Wav");
psuMbedHead 0:c1332385cffa 64
psuMbedHead 1:af51ee0c367d 65 double j = 1.65*sin(2*pi*i/100)+1.65; //formula to plot a sin wave from 0 to 3.3V over 100 points
psuMbedHead 1:af51ee0c367d 66 DAC.write(MCP4725::Normal, (0xFFF * (j/3.3)), false); //send value to the DAC
psuMbedHead 1:af51ee0c367d 67 wait_ms(10); //going from 0 to 2pi over 100 points -> 1 second/100
psuMbedHead 1:af51ee0c367d 68 i++; //increment to the next point
psuMbedHead 0:c1332385cffa 69 } //end if case
psuMbedHead 0:c1332385cffa 70 else if(SIGNAL_MODE == 1){
psuMbedHead 0:c1332385cffa 71 //sin wave 10kHz or 100us
psuMbedHead 0:c1332385cffa 72 lcd.putc(0); lcd.putc(1); lcd.printf("10kHz Sin Wav");
psuMbedHead 0:c1332385cffa 73
psuMbedHead 1:af51ee0c367d 74 double k = 1.65*sin(2*pi*i/100)+1.65; //formula to plot a sin wave from 0 to 3.3V over 100 points
psuMbedHead 1:af51ee0c367d 75 DAC.write(MCP4725::Normal, (0xFFF * (k/3.3)), false); //send value to the DAC
psuMbedHead 1:af51ee0c367d 76 wait_us(1); //going from 0 to 2pi over 100 points -> 100 usecond/100
psuMbedHead 1:af51ee0c367d 77 i++; //increment to the next point
psuMbedHead 0:c1332385cffa 78 } //end if case
psuMbedHead 0:c1332385cffa 79 else if(SIGNAL_MODE == 2){
psuMbedHead 0:c1332385cffa 80 //square wave 1Hz or 1s
psuMbedHead 0:c1332385cffa 81 lcd.putc(2); lcd.putc(3); lcd.printf("1Hz Sq Wav");
psuMbedHead 0:c1332385cffa 82
psuMbedHead 1:af51ee0c367d 83 DAC.write(MCP4725::Normal, 0xFFF, false); //set to max value
psuMbedHead 1:af51ee0c367d 84 wait_ms(500); //wait half the period
psuMbedHead 1:af51ee0c367d 85 DAC.write(MCP4725::Normal, 0x000, false); //set to min value
psuMbedHead 1:af51ee0c367d 86 wait_ms(500); //wait half the period
psuMbedHead 0:c1332385cffa 87 } //end if case
psuMbedHead 0:c1332385cffa 88 else if(SIGNAL_MODE == 3){
psuMbedHead 0:c1332385cffa 89 //square wave 10kHz or 100us
psuMbedHead 0:c1332385cffa 90 lcd.putc(2); lcd.putc(3); lcd.printf("10kHz Sq Wav");
psuMbedHead 0:c1332385cffa 91
psuMbedHead 1:af51ee0c367d 92 DAC.write(MCP4725::Normal, 0xFFF, false); //set to max value
psuMbedHead 1:af51ee0c367d 93 wait_us(50); //wait half the period
psuMbedHead 1:af51ee0c367d 94 DAC.write(MCP4725::Normal, 0x000, false); //set to min value
psuMbedHead 1:af51ee0c367d 95 wait_us(50); //wait half the period
psuMbedHead 0:c1332385cffa 96 } //end if case
psuMbedHead 0:c1332385cffa 97 else{
psuMbedHead 1:af51ee0c367d 98 lcd.printf("ERROR CASE"); //print to show error
psuMbedHead 0:c1332385cffa 99 //do nothing
psuMbedHead 0:c1332385cffa 100 } //end default
psuMbedHead 0:c1332385cffa 101 } //end while(on) loop
psuMbedHead 0:c1332385cffa 102 } //end while(1) loop
psuMbedHead 0:c1332385cffa 103 } //end main