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add tri-state and right 74HC165 to sr0_LED_shiftRegs.ino

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wolfv6 2016-10-31 17:43:53 -06:00
parent 6dde737d23
commit 3fa0aee2e2
2 changed files with 9 additions and 5 deletions
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8
src/Row.h
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@ -11,8 +11,12 @@
/*
strobePin has one of two formats:
* if refScanner a Scanner_uC, then strobePin is an Arduino pin number connected to this row
* otherwise strobePin is bit pattern, 1 indicating an IC pin connected to this row
1. if strobe pin is on uC (Scanner_uC or Scanner_ShiftRegsPISOMultiRow),
then strobePin is an Arduino pin number connected to this row.
2. if strobe pin is on I/O expander (Scanner_IOE), then strobePin is bit pattern,
1 indicating the I/O expander pin connected to this row
todo instantiation examples - here or in Scanner?
*/
class Row
{

6
src/Scanner_ShiftRegsPISOMultiRow.cpp
View File

@ -21,7 +21,7 @@ Initializes shift register's shift/load pin.
*/
void Scanner_ShiftRegsPISOMultiRow::begin()
{
SPI.begin();
SPI.begin(); //todo move this to constructor or init()
}
/* scan() strobes the row's strobePin and returns state of the shift register's input pins.
@ -32,7 +32,7 @@ read_pins_t Scanner_ShiftRegsPISOMultiRow::scan(const uint8_t strobePin)
{
read_pins_t readState = 0; //bits, 1 means key is pressed, 0 means released
//SPI.beginTransaction( SPISettings(5000000, MSBFIRST, SPI_MODE0) ); //control SPI bus, 5 MHz
SPI.beginTransaction( SPISettings(5000000, MSBFIRST, SPI_MODE0) ); //control SPI bus, 5 MHz
digitalWrite(slaveSelect, LOW); //load parallel inputs to registers
@ -46,7 +46,7 @@ read_pins_t Scanner_ShiftRegsPISOMultiRow::scan(const uint8_t strobePin)
SPI.transfer(&readState, byte_count);
//SPI.endTransaction();
SPI.endTransaction();
return readState;
}