remove RowBase::wait(), add RowDelay.delay()
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6bbb05716f
@ -26,7 +26,7 @@ Layout
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#include <Row_ShiftRegisters.h>
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// =============== CONFIGURATION ===============
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const unsigned int RowBase::DELAY_MICROSECONDS = 0; //500
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const unsigned int RowDelay::DELAY_MICROSECONDS = 0; //500
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const bool RowScanner_PinsArray::ACTIVE_HIGH = 0; //left matrix is active low
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const uint8_t RowScanner_SPIShiftRegisters::SHIFT_LOAD = 10;
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@ -1,40 +1,4 @@
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#include "RowBase.h"
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/* wait() delay's scan to give switches time to debounce.
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This version of wait() is very simple. More sophisticated versions can override this one.
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For fastest response time, wait() should be placed before scan() or after pressRelease()
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(waiting between scan and send would unnecessarily delay send).
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DELAY_MICROSECONDS explained
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----------------------------
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A keyboard with a faster scan rate responds faster.
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Follow these step to tune DELAY_MICROSECONDS for maximum scan rate for a given SAMPLE_COUNT:
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Initialize DELAY_MICROSECONDS in your sketch:
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const unsigned int RowBase::DELAY_MICROSECONDS = 1000;
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Add this to the sketch's loop() function:
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debug.print_microseconds_per_scan();
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Compile and load the sketch into the microcontroller; microseconds_per_scan is printed every second.
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Adjust the value of DELAY_MICROSECONDS and repeat until:
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debug.print_microseconds_per_scan() <= DEBOUNCE_TIME / SAMPLE_COUNT
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DEBOUNCE_TIME can be obtained from the switch's datasheet. Some switch bounce times are:
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Cherry MX specifies 5msec bounce time http://www.cherrycorp.com/english/switches/key/mx.htm
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hasu measured Cherry MX bounce times .3ms to 1.4ms http://geekhack.org/index.php?topic=42385.0
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Tactile switch MJTP series bounce 10 ms http://www.apem.com/files/apem/brochures/MJTP_6MM.pdf
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Avoid sampling the switch input at a rate synchronous to events in the environment
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that might create periodic EMI. For instance, 50 and 60 Hz.
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The largest allowable DELAY_MICROSECONDS is 65535 (.065535 seconds).
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Polling I2C may slow the scan rate enough so that no additional delay is needed:
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const unsigned int RowBase::DELAY_MICROSECONDS = 0;
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*/
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void RowBase::wait()
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{
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delayMicroseconds(DELAY_MICROSECONDS); //delay between Row scans to debounce switches
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}
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/*
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pressRelease() calls key's press() or release() function if it was pressed or released.
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Both parameters are bitwise.
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@ -10,14 +10,10 @@
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class RowBase
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{
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private:
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static const unsigned int DELAY_MICROSECONDS; //delay between each Row scan for debouncing
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Key *const *const ptrsKeys; //array of Key pointers
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virtual void keyWasPressed();
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protected:
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read_pins_t debounced; //bitwise, 1 means pressed, 0 means released
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void wait();
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void pressRelease(const read_pins_mask_t rowEnd, const read_pins_t debouncedChanged);
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public:
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RowBase(Key *const ptrsKeys[]) : ptrsKeys(ptrsKeys), debounced(0) { }
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7
src/RowDelay.cpp
Parasts fails
7
src/RowDelay.cpp
Parasts fails
@ -0,0 +1,7 @@
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#include "RowDelay.h"
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void RowDelay::delay()
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{
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delayMicroseconds(DELAY_MICROSECONDS);
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}
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45
src/RowDelay.h
Parasts fails
45
src/RowDelay.h
Parasts fails
@ -0,0 +1,45 @@
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#ifndef ROWDELAY_H
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#define ROWDELAY_H
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#include <Arduino.h>
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#include <inttypes.h>
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/* RowDelay() delay's scan to give switches time to debounce.
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For fastest response time, RowDelay() should be placed before scan() or after pressRelease()
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(RowDelay() between scan and send would unnecessarily delay send).
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DELAY_MICROSECONDS explained
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----------------------------
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A keyboard with a faster scan rate responds faster.
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Follow these step to tune DELAY_MICROSECONDS for maximum scan rate for a given SAMPLE_COUNT:
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Initialize DELAY_MICROSECONDS in your sketch:
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const unsigned int RowDelay::DELAY_MICROSECONDS = 1000;
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Add this to the sketch's loop() function:
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debug.print_microseconds_per_scan();
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Compile and load the sketch into the microcontroller; microseconds_per_scan is printed every second.
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Adjust the value of DELAY_MICROSECONDS and repeat until:
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debug.print_microseconds_per_scan() <= DEBOUNCE_TIME / SAMPLE_COUNT
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DEBOUNCE_TIME can be obtained from the switch's datasheet. Some switch bounce times are:
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Cherry MX specifies 5msec bounce time http://www.cherrycorp.com/english/switches/key/mx.htm
|
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hasu measured Cherry MX bounce times .3ms to 1.4ms http://geekhack.org/index.php?topic=42385.0
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Tactile switch MJTP series bounce 10 ms http://www.apem.com/files/apem/brochures/MJTP_6MM.pdf
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Avoid sampling the switch input at a rate synchronous to events in the environment
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that might create periodic EMI. For instance, 50 and 60 Hz.
|
||||
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The largest allowable DELAY_MICROSECONDS is 65535 (.065535 seconds).
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Polling I2C may slow the scan rate enough so that no additional delay is needed:
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const unsigned int RowDelay::DELAY_MICROSECONDS = 0;
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DELAY_MICROSECONDS is static so multiple row types can share it.
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For example, primary and secondary matrices would share the same DELAY_MICROSECONDS.
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*/
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class RowDelay
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{
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private:
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static const unsigned int DELAY_MICROSECONDS; //delay between each Row scan for debouncing
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public:
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void delay();
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};
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#endif
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@ -7,7 +7,7 @@ void Row_IOE::process()
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read_pins_mask_t rowEnd; //1 bit marks positioned after last key of row
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read_pins_t debouncedChanged; //1 means debounced changed
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wait();
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rowDelay.delay();
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rowState = scanner.scan(rowEnd);
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debouncedChanged = debouncer.debounce(rowState, debounced);
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pressRelease(rowEnd, debouncedChanged);
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@ -2,6 +2,7 @@
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#define ROWIOE_H
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#include <RowBase.h>
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#include <RowDelay.h>
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#include <RowScanner_PinsBitwise.h>
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#include <Debouncer_4Samples.h>
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@ -34,6 +35,7 @@ Number of pins in colPort0 should equal number of keys in ptrsKeys_0[] array.
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class Row_IOE : public RowBase
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{
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private:
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RowDelay rowDelay;
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RowScanner_PinsBitwise scanner;
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Debouncer_4Samples debouncer;
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public:
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@ -7,7 +7,7 @@ void Row_ShiftRegisters::process()
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read_pins_mask_t rowEnd; //1 bit marks positioned after last key of row
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read_pins_t debouncedChanged; //1 means debounced changed
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wait();
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rowDelay.delay();
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rowState = scanner.scan(rowEnd);
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debouncedChanged = debouncer.debounce(rowState, debounced);
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pressRelease(rowEnd, debouncedChanged);
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@ -2,6 +2,7 @@
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#define ROW_SHIFTREGISTERS_H
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#include <RowBase.h>
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#include <RowDelay.h>
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#include <RowScanner_SPIShiftRegisters.h>
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#include <Debouncer_4Samples.h>
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//#include <Debouncer_Not.h>
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@ -27,6 +28,7 @@ Number of pins in colPort0 should equal number of keys in ptrsKeys_0[] array.
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class Row_ShiftRegisters : public RowBase
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{
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private:
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RowDelay rowDelay;
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RowScanner_SPIShiftRegisters scanner;
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Debouncer_4Samples debouncer;
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//Debouncer_Not debouncer; //tested
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@ -10,7 +10,7 @@ void Row_uC::process()
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read_pins_mask_t rowEnd; //1 bit marks positioned after last key of row
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read_pins_t debouncedChanged; //1 means debounced changed
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wait();
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rowDelay.delay();
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rowState = scanner.scan(rowEnd);
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debouncedChanged = debouncer.debounce(rowState, debounced);
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pressRelease(rowEnd, debouncedChanged);
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@ -2,6 +2,7 @@
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#define ROW_H
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#include <RowBase.h>
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#include <RowDelay.h>
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#include <RowScanner_PinsArray.h>
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#include <Debouncer_4Samples.h>
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@ -29,6 +30,7 @@ Number of colPins should equal number of keys in ptrsKeys_0[] array.
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class Row_uC : public RowBase
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{
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private:
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RowDelay rowDelay;
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RowScanner_PinsArray scanner;
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Debouncer_4Samples debouncer;
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public:
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