Tom Davies
Basic code for multiplexing LU-3011 11 Digit 7 Segment Display
main.cpp
- Committer:
- logictom
- Date:
- 2011-10-07
- Revision:
- 1:763fde365f8e
- Parent:
- 0:61e6eaba7852
File content as of revision 1:763fde365f8e:
//
// LU-3011 11 Digit 7 Segment Display
// v0.1 06/10/11
// Uses ticker to muliplex display to show whole numbers
// Maybe more efficient way to code switch/case segment?
// Doesn't currently handle decimal point - whole numbers only
//
#include "mbed.h"
//Prototypes
void dispNumDig (int num, int digit);
void upDisp (void);
void updateDisp (int num, int digit);
void showNum(unsigned int num);
//Globals
int dispArray[15]; // Holds Displayed Value
int dispArrayIndex = 0; // Used to cycle digits displayed by ticker
Ticker pov; // Ticker Interrupt
Serial pc(USBTX,USBRX); // Default PC Comms
DigitalOut myled(LED1); // Onboard LED for debug
// 7 Segment Display - PCB Connections
// Digits
DigitalOut D11(p7); //PCB Pin 1 - Digit 11
DigitalOut D10(p30); //PCB Pin 2
DigitalOut D9(p29); //PCB Pin 3
DigitalOut D8(p28); //PCB Pin 4
DigitalOut D7(p26); //PCB Pin 6
DigitalOut D6(p24); //PCB Pin 8
DigitalOut D5(p22); //PCB Pin 10
DigitalOut D4(p20); //PCB Pin 12
DigitalOut D3(p18); //PCB Pin 14
DigitalOut D2(p16); //PCB Pin 16
DigitalOut D1(p14); //PCB Pin 18
// Segments
DigitalOut SP(p27); //PCB Pin 5 - Segment Decimal Point
DigitalOut SA(p21); //PCB Pin 11 - Segment A
DigitalOut SB(p13); //PCB Pin 19
DigitalOut SC(p25); //PCB Pin 7
DigitalOut SD(p17); //PCB Pin 15
DigitalOut SE(p23); //PCB Pin 9
DigitalOut SF(p15); //PCB Pin 17
DigitalOut SG(p19); //PCB Pin 13
////////////////////////////////////////////////
int main()
{
pov.attach_us(&upDisp, 100); // Function called (upDisp) by ticker(POV), interval (100uS)
while (1)
{
myled = 1;
wait(0.2);
myled = 0;
wait(0.2);
// Quick check - wiring and code correct
updateDisp (1, 11); //number, digit
updateDisp (2, 10); //Directly updating array through function
updateDisp (3, 9);
updateDisp (4, 8);
updateDisp (5, 7);
updateDisp (6, 6);
updateDisp (7, 5);
updateDisp (8, 4);
updateDisp (9, 3);
updateDisp (0, 2);
updateDisp (1, 1);
wait(2);
for(int i=0;i<12;i++)
{
dispArray[i] = 11; //Any number other that 0-9 blanks digit
}
wait(1);
while (1)
{ // Loop Counting
for (unsigned int i=0; i<2000000000; i++)
{ //Loop - arbitary value
showNum(i); //Update number
wait_us(50); //Wait period
}
}
} //End While
} //End of main
////////////////////////////////////////////////
void showNum(unsigned int num)
{ //Splits number into digits
if (num < 10)
{ //If < 10 only 1 digit needed
updateDisp (num, 1); //Update array
}
else
{ //Otherwise split and add to array
int count = 1;
while (num!=0)
{ //Split each digit and add to array in position for display
int digit = num % 10;
num = num / 10;
updateDisp (digit, count);
count++;
}
}
}
////////////////////////////////////////////////
void updateDisp (int num, int digit)
{ //Update display array
//Seperate function - not needed now but maybe for further fuctionality
dispArray[digit] = num;
}
////////////////////////////////////////////////
void upDisp (void)
{ //Called by ticker - switched displayed digit - using POV to muliplex display
if (dispArrayIndex < 11)
{ //Increment display index
dispArrayIndex++;
}
else
{ //Otherwise out of rage - reset
dispArrayIndex = 0;
}
// Call function to switch digit and value
dispNumDig (dispArray[dispArrayIndex], dispArrayIndex);
}
////////////////////////////////////////////////
void dispNumDig (int num, int digit)
{ //Switches Digit and corrisponding Segments
//Switch/Case setup - more efficient way of coding???
switch (digit)
{
case 1:
D1 = 0;
D2 = 1;
D3 = 1;
D4 = 1;
D5 = 1;
D6 = 1;
D7 = 1;
D8 = 1;
D9 = 1;
D10 = 1;
D11 = 1;
break;
case 2:
D1 = 1;
D2 = 0;
D3 = 1;
D4 = 1;
D5 = 1;
D6 = 1;
D7 = 1;
D8 = 1;
D9 = 1;
D10 = 1;
D11 = 1;
break;
case 3:
D1 = 1;
D2 = 1;
D3 = 0;
D4 = 1;
D5 = 1;
D6 = 1;
D7 = 1;
D8 = 1;
D9 = 1;
D10 = 1;
D11 = 1;
break;
case 4:
D1 = 1;
D2 = 1;
D3 = 1;
D4 = 0;
D5 = 1;
D6 = 1;
D7 = 1;
D8 = 1;
D9 = 1;
D10 = 1;
D11 = 1;
break;
case 5:
D1 = 1;
D2 = 1;
D3 = 1;
D4 = 1;
D5 = 0;
D6 = 1;
D7 = 1;
D8 = 1;
D9 = 1;
D10 = 1;
D11 = 1;
break;
case 6:
D1 = 1;
D2 = 1;
D3 = 1;
D4 = 1;
D5 = 1;
D6 = 0;
D7 = 1;
D8 = 1;
D9 = 1;
D10 = 1;
D11 = 1;
break;
case 7:
D1 = 1;
D2 = 1;
D3 = 1;
D4 = 1;
D5 = 1;
D6 = 1;
D7 = 0;
D8 = 1;
D9 = 1;
D10 = 1;
D11 = 1;
break;
case 8:
D1 = 1;
D2 = 1;
D3 = 1;
D4 = 1;
D5 = 1;
D6 = 1;
D7 = 1;
D8 = 0;
D9 = 1;
D10 = 1;
D11 = 1;
break;
case 9:
D1 = 1;
D2 = 1;
D3 = 1;
D4 = 1;
D5 = 1;
D6 = 1;
D7 = 1;
D8 = 1;
D9 = 0;
D10 = 1;
D11 = 1;
break;
case 10:
D1 = 1;
D2 = 1;
D3 = 1;
D4 = 1;
D5 = 1;
D6 = 1;
D7 = 1;
D8 = 1;
D9 = 1;
D10 = 0;
D11 = 1;
break;
case 11:
D1 = 1;
D2 = 1;
D3 = 1;
D4 = 1;
D5 = 1;
D6 = 1;
D7 = 1;
D8 = 1;
D9 = 1;
D10 = 1;
D11 = 0;
break;
default: //If out of range switch off all digits
D1 = 1;
D2 = 1;
D3 = 1;
D4 = 1;
D5 = 1;
D6 = 1;
D7 = 1;
D8 = 1;
D9 = 1;
D10 = 1;
D11 = 1;
break;
}
switch (num)
{ //Case not currently included for decimcal point (SP)
case 0:
SP = 0;
SA = 1;
SB = 1;
SC = 1;
SD = 1;
SE = 1;
SF = 1;
SG = 0;
break;
case 1:
SP = 0;
SA = 0;
SB = 1;
SC = 1;
SD = 0;
SE = 0;
SF = 0;
SG = 0;
break;
case 2:
SP = 0;
SA = 1;
SB = 1;
SC = 0;
SD = 1;
SE = 1;
SF = 0;
SG = 1;
break;
case 3:
SP = 0;
SA = 1;
SB = 1;
SC = 1;
SD = 1;
SE = 0;
SF = 0;
SG = 1;
break;
case 4:
SP = 0;
SA = 0;
SB = 1;
SC = 1;
SD = 0;
SE = 0;
SF = 1;
SG = 1;
break;
case 5:
SP = 0;
SA = 1;
SB = 0;
SC = 1;
SD = 1;
SE = 0;
SF = 1;
SG = 1;
break;
case 6:
SP = 0;
SA = 1;
SB = 0;
SC = 1;
SD = 1;
SE = 1;
SF = 1;
SG = 1;
break;
case 7:
SP = 0;
SA = 1;
SB = 1;
SC = 1;
SD = 0;
SE = 0;
SF = 0;
SG = 0;
break;
case 8:
SP = 0;
SA = 1;
SB = 1;
SC = 1;
SD = 1;
SE = 1;
SF = 1;
SG = 1;
break;
case 9:
SP = 0;
SA = 1;
SB = 1;
SC = 1;
SD = 1;
SE = 0;
SF = 1;
SG = 1;
break;
default: // If out of range switch off all segments
SP = 0;
SA = 0;
SB = 0;
SC = 0;
SD = 0;
SE = 0;
SF = 0;
SG = 0;
}
}