Kojo / FourDigitLED

Four digit 7 segment LED driver

Dependents:   IF-SmartClock

FourDigitLED.cpp@4:5ed17505c88e, 2015-11-22 (annotated)

Committer:
takashikojo
Date:
Sun Nov 22 08:46:13 2015 +0000
Revision:
4:5ed17505c88e
Parent:
3:73f31aea935a 
Cleaned comments

Who changed what in which revision?

UserRevisionLine numberNew contents of line
takashikojo 0:7a8925d2a8e7 1 #include <mbed.h>
takashikojo 3:73f31aea935a 2 #include <rtos.h>
takashikojo 1:c94aa39af4c7 3 #include "FourDigitLED.h"
takashikojo 0:7a8925d2a8e7 4
takashikojo 0:7a8925d2a8e7 5 static unsigned char SegPattern[] = {
takashikojo 3:73f31aea935a 6 0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x27, 0x7f, 0x6f,
takashikojo 3:73f31aea935a 7 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71
takashikojo 0:7a8925d2a8e7 8 };
takashikojo 0:7a8925d2a8e7 9
takashikojo 3:73f31aea935a 10 FourDigitLED::FourDigitLED(PinName seg0, PinName seg1, PinName seg2, PinName seg3,
takashikojo 3:73f31aea935a 11 PinName seg4, PinName seg5, PinName seg6, PinName dot,
takashikojo 3:73f31aea935a 12 PinName digit0, PinName digit1, PinName digit2, PinName digit3
takashikojo 3:73f31aea935a 13 )
takashikojo 0:7a8925d2a8e7 14 {
takashikojo 0:7a8925d2a8e7 15 LEDs = new BusOut( seg0, seg1, seg2, seg3, seg4, seg5, seg6, dot, digit0, digit1, digit2, digit3) ;
takashikojo 0:7a8925d2a8e7 16 scan_digit = 0 ;
takashikojo 0:7a8925d2a8e7 17 /* test LEDs */
takashikojo 3:73f31aea935a 18
takashikojo 0:7a8925d2a8e7 19 LEDs->write(0xfe00 | MASK_DOT | 0x0) ;
takashikojo 0:7a8925d2a8e7 20 wait(1.0) ;
takashikojo 3:73f31aea935a 21 setNum(0, 8); setNum(1, 8); setNum(2, 8); setNum(3, 8);
takashikojo 3:73f31aea935a 22 setDot(0, 1); setDot(1, 1); setDot(2, 1); setDot(3, 1);
takashikojo 0:7a8925d2a8e7 23 /* end test */
takashikojo 4:5ed17505c88e 24
takashikojo 0:7a8925d2a8e7 25 wait(1.0) ;
takashikojo 0:7a8925d2a8e7 26 val[0] = 0 ; val[1] = 0 ; val[2] = 0 ; val[3] = 0 ;
takashikojo 0:7a8925d2a8e7 27 }
takashikojo 0:7a8925d2a8e7 28
takashikojo 0:7a8925d2a8e7 29 FourDigitLED::~FourDigitLED()
takashikojo 0:7a8925d2a8e7 30 {
takashikojo 0:7a8925d2a8e7 31 }
takashikojo 0:7a8925d2a8e7 32
takashikojo 3:73f31aea935a 33
takashikojo 3:73f31aea935a 34 void FourDigitLED::scanDigit(void)
takashikojo 0:7a8925d2a8e7 35 {
takashikojo 0:7a8925d2a8e7 36 int d ;
takashikojo 0:7a8925d2a8e7 37 d= ++scan_digit ;
takashikojo 0:7a8925d2a8e7 38 d= d % DIGITS ;
takashikojo 0:7a8925d2a8e7 39 LEDs->write(~(0x100 << d) & 0xff00 | (val[d] & 0xff) ) ;
takashikojo 0:7a8925d2a8e7 40 }
takashikojo 0:7a8925d2a8e7 41
takashikojo 2:c4e8b2fd8f7e 42 unsigned int FourDigitLED::getPtn(int d)
takashikojo 1:c94aa39af4c7 43 {
takashikojo 2:c4e8b2fd8f7e 44 if((d>=0) && (d<=sizeof(SegPattern)))
takashikojo 2:c4e8b2fd8f7e 45 return SegPattern[d] ;
takashikojo 2:c4e8b2fd8f7e 46 else
takashikojo 2:c4e8b2fd8f7e 47 return 0 ;
takashikojo 2:c4e8b2fd8f7e 48 }
takashikojo 2:c4e8b2fd8f7e 49
takashikojo 2:c4e8b2fd8f7e 50 unsigned int FourDigitLED::setPtn(int d, unsigned int ptn, unsigned int mask)
takashikojo 2:c4e8b2fd8f7e 51 {
takashikojo 2:c4e8b2fd8f7e 52 val[d] = (val[d] & 0xff80) | (ptn & mask);
takashikojo 1:c94aa39af4c7 53 return ptn ;
takashikojo 1:c94aa39af4c7 54 }
takashikojo 1:c94aa39af4c7 55
takashikojo 0:7a8925d2a8e7 56 int FourDigitLED::setNum(int d, int n)
takashikojo 0:7a8925d2a8e7 57 {
takashikojo 1:c94aa39af4c7 58 if((n <0) || (n >= 16))
takashikojo 1:c94aa39af4c7 59 val[d] = val[d] & 0xff80 ;
takashikojo 1:c94aa39af4c7 60 else
takashikojo 1:c94aa39af4c7 61 val[d] = (val[d] & 0xff80) | SegPattern[n] ;
takashikojo 0:7a8925d2a8e7 62 return n ;
takashikojo 0:7a8925d2a8e7 63 }
takashikojo 0:7a8925d2a8e7 64
takashikojo 0:7a8925d2a8e7 65 int FourDigitLED::setDot(int d, bool n)
takashikojo 0:7a8925d2a8e7 66 {
takashikojo 0:7a8925d2a8e7 67 val[d] = (val[d] & 0xff7f) | ((n == false) ? 0x0 : 0x80) ;
takashikojo 0:7a8925d2a8e7 68 return n ;
takashikojo 0:7a8925d2a8e7 69 }
takashikojo 0:7a8925d2a8e7 70
takashikojo 3:73f31aea935a 71 void FourDigitLED::dump(void)
takashikojo 3:73f31aea935a 72 {
takashikojo 3:73f31aea935a 73 printf("val = %02x, %02x, %02x, %02x\n", val[3], val[2], val[1], val[0]) ;
takashikojo 0:7a8925d2a8e7 74 }