PROJ515 / ShiftReg

Shift registers working

ShiftReg.cpp@1:9cc13bd590df, 2019-05-07 (annotated)

Committer:
mwthewsey
Date:
Tue May 07 13:19:27 2019 +0000
Revision:
1:9cc13bd590df
Parent:
0:a0e3fd47970f 
arse bicuits

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yoonghm 0:a0e3fd47970f 1 #include "mbed.h"
yoonghm 0:a0e3fd47970f 2 #include "ShiftReg.h"
yoonghm 0:a0e3fd47970f 3
mwthewsey 1:9cc13bd590df 4 ShiftReg::ShiftReg(PinName data, PinName store, PinName clock ): _ds(data), _st(store), _sh(clock){}//Constructor
mwthewsey 1:9cc13bd590df 5 void ShiftReg::ShiftByte (uint16_t data, BitOrd ord )
yoonghm 0:a0e3fd47970f 6 {
mwthewsey 1:9cc13bd590df 7 uint16_t mask;
mwthewsey 1:9cc13bd590df 8 if (ord == MSBFirst)
mwthewsey 1:9cc13bd590df 9 {
mwthewsey 1:9cc13bd590df 10 mask = 0x8000;
mwthewsey 1:9cc13bd590df 11 }
mwthewsey 1:9cc13bd590df 12 else
mwthewsey 1:9cc13bd590df 13 {
mwthewsey 1:9cc13bd590df 14 mask = 0x0001;
mwthewsey 1:9cc13bd590df 15 }
mwthewsey 1:9cc13bd590df 16 for (uint8_t i = 0; i < 16; i++)
yoonghm 0:a0e3fd47970f 17 {
mwthewsey 1:9cc13bd590df 18 //_ds = data;
yoonghm 0:a0e3fd47970f 19
mwthewsey 1:9cc13bd590df 20 if (data & mask)
mwthewsey 1:9cc13bd590df 21 {
mwthewsey 1:9cc13bd590df 22 _ds = 1;
mwthewsey 1:9cc13bd590df 23 }
mwthewsey 1:9cc13bd590df 24 else
mwthewsey 1:9cc13bd590df 25 {
mwthewsey 1:9cc13bd590df 26 _ds = 0;
mwthewsey 1:9cc13bd590df 27 }
mwthewsey 1:9cc13bd590df 28 if (ord == MSBFirst)
mwthewsey 1:9cc13bd590df 29 {
mwthewsey 1:9cc13bd590df 30 mask = mask >> 1;
mwthewsey 1:9cc13bd590df 31 }
mwthewsey 1:9cc13bd590df 32 else
mwthewsey 1:9cc13bd590df 33 {
mwthewsey 1:9cc13bd590df 34 mask = mask << 1;
mwthewsey 1:9cc13bd590df 35 }
yoonghm 0:a0e3fd47970f 36 _sh = 0;
yoonghm 0:a0e3fd47970f 37 _sh = 1;
yoonghm 0:a0e3fd47970f 38 }
yoonghm 0:a0e3fd47970f 39 }
mwthewsey 1:9cc13bd590df 40 void ShiftReg::ShiftBit(int8_t data)
yoonghm 0:a0e3fd47970f 41 {
yoonghm 0:a0e3fd47970f 42 _ds = data;
yoonghm 0:a0e3fd47970f 43 _sh = 0;
yoonghm 0:a0e3fd47970f 44 _sh = 1;
yoonghm 0:a0e3fd47970f 45 }
yoonghm 0:a0e3fd47970f 46
mwthewsey 1:9cc13bd590df 47 void ShiftReg::Latch()
yoonghm 0:a0e3fd47970f 48 {
yoonghm 0:a0e3fd47970f 49 _st = 1;
yoonghm 0:a0e3fd47970f 50 _st = 0;
yoonghm 0:a0e3fd47970f 51 }