40 line
974 B
C++
40 line
974 B
C++
#include "Port_ShiftRegs.h"
|
|
|
|
Port_ShiftRegs::Port_ShiftRegs(const uint8_t slaveSelect) : slaveSelect(slaveSelect)
|
|
{
|
|
pinMode(slaveSelect, OUTPUT);
|
|
}
|
|
|
|
/* begin() should be called once from sketch setup().
|
|
Initializes shift register's shift/load pin.
|
|
*/
|
|
void Port_ShiftRegs::begin()
|
|
{
|
|
digitalWrite(slaveSelect, HIGH);
|
|
SPI.begin();
|
|
}
|
|
|
|
/* writeLow() sets pin output LOW.
|
|
pin is bit pattern, where pin being set is 1.
|
|
*/
|
|
void Port_ShiftRegs::writeLow(const uint8_t pin)
|
|
{
|
|
outputVal &= ~pin; //set pin output to low
|
|
|
|
digitalWrite(slaveSelect, LOW);
|
|
SPI.transfer(outputVal);
|
|
digitalWrite (slaveSelect, HIGH);
|
|
}
|
|
|
|
/* writeHigh() sets pin output HIGH.
|
|
pin is bit pattern, where pin being set is 1.
|
|
*/
|
|
void Port_ShiftRegs::writeHigh(const uint8_t pin)
|
|
{
|
|
outputVal |= pin; //set pin output to high
|
|
|
|
digitalWrite(slaveSelect, LOW);
|
|
SPI.transfer(outputVal);
|
|
digitalWrite (slaveSelect, HIGH);
|
|
}
|