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Code Issues 4 Pull Requests Releases Activity

Fixed button handling in combination with sleep mode 

Ready for prototype!
This commit is contained in:
Mark van Renswoude 2017-08-02 22:21:59 +02:00
parent 8332eb6b0f
commit ca9c4db52e
8 changed files with 108 additions and 62 deletions
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92
Source/src/buttons.c
View File

@ -1,6 +1,7 @@
#include "buttons.h"
#include <avr/interrupt.h>
#include <util/atomic.h>
#include <util/delay.h>
ButtonState buttonUp;
@ -8,24 +9,26 @@ ButtonState buttonDown;
ButtonState buttonOption;
void button_init(ButtonState* state)
{
(*state).flags = BSFLastReported;
(*state).debounceTicks = 0;
(*state).repeatTicks = 0;
}
// Since it's a pull-up, the value is low when the button is pressed.
// This macro just helps make the code more readable.
#define isPressed(state) (!state)
#define hasFlag(flags, value) ((flags & value) != 0)
#define setFlag(flags, value) flags |= (value)
#define clearFlag(flags, value) flags &= ~(value)
uint8_t inactivityTicks = 0;
void buttons_init()
{
button_init(&buttonUp);
button_init(&buttonDown);
button_init(&buttonOption);
// Input with internal pull-up resistor
DDRB &= ~BUTTON_ALL;
PORTB |= BUTTON_ALL;
buttons_reset();
// Mode 2: CTC
TCCR0A = _BV(WGM01);
@ -41,24 +44,40 @@ void buttons_init()
}
void button_init(ButtonState* state, uint8_t readState)
{
(*state).flags = readState ? BSFLastReported : 0;
(*state).debounceTicks = 0;
(*state).repeatTicks = 0;
}
// Since it's a pull-up, the value is low when the button is pressed.
// This macro just helps make the code more readable.
#define isPressed(state) (!state)
#define flagSet(flags, value) ((flags & value) != 0)
#define setFlag(flags, value) flags |= (value)
#define clearFlag(flags, value) flags &= ~(value)
void buttons_reset()
{
uint8_t pinState = PINB;
button_init(&buttonUp, hasFlag(pinState, _BV(BUTTON_UP)));
button_init(&buttonDown, hasFlag(pinState, _BV(BUTTON_DOWN)));
button_init(&buttonOption, hasFlag(pinState, _BV(BUTTON_OPTION)));
}
void button_check(ButtonState* state, uint8_t readState)
uint8_t buttons_active()
{
return inactivityTicks <= DEBOUNCE_TIME;
}
uint8_t button_check(ButtonState* state, uint8_t readState)
{
#define stateRef (*state)
uint8_t lastState = flagSet(stateRef.flags, BSFLastReported);
uint8_t lastState = hasFlag(stateRef.flags, BSFLastReported);
uint8_t newState = lastState;
// Debounce
if (readState != lastState)
{
@ -76,7 +95,7 @@ void button_check(ButtonState* state, uint8_t readState)
}
else
{
// State changed, reset debounce timer
// State reverted, reset debounce timer
stateRef.debounceTicks = 0;
}
@ -91,7 +110,7 @@ void button_check(ButtonState* state, uint8_t readState)
setFlag(stateRef.flags, BSFPressed | BSFRepeatEnabled);
stateRef.repeatTicks = REPEAT_START;
}
else if (flagSet(stateRef.flags, BSFRepeatEnabled))
else if (hasFlag(stateRef.flags, BSFRepeatEnabled))
{
// Held pressed
stateRef.repeatTicks--;
@ -105,10 +124,12 @@ void button_check(ButtonState* state, uint8_t readState)
}
else if (isPressed(lastState))
{
// Released
setFlag(stateRef.flags, BSFReleased);
// Only trigger Released if Pressed is not yet removed by polling
if (hasFlag(stateRef.flags, BSFPressed))
setFlag(stateRef.flags, BSFReleased);
}
return isPressed(newState) || (stateRef.debounceTicks > 0);
#undef stateRef
}
@ -118,10 +139,16 @@ void button_check(ButtonState* state, uint8_t readState)
ISR(TIMER0_COMPA_vect)
{
uint8_t pinState = PINB;
uint8_t buttonActive;
button_check(&buttonUp, flagSet(pinState, _BV(BUTTON_UP)));
button_check(&buttonDown, flagSet(pinState, _BV(BUTTON_DOWN)));
button_check(&buttonOption, flagSet(pinState, _BV(BUTTON_OPTION)));
buttonActive = button_check(&buttonUp, hasFlag(pinState, _BV(BUTTON_UP)));
buttonActive = button_check(&buttonDown, hasFlag(pinState, _BV(BUTTON_DOWN))) || buttonActive;
buttonActive = button_check(&buttonOption, hasFlag(pinState, _BV(BUTTON_OPTION))) || buttonActive;
if (buttonActive)
inactivityTicks = 0;
else if (inactivityTicks <= DEBOUNCE_TIME)
inactivityTicks++;
}
@ -132,7 +159,7 @@ inline uint8_t readAndClearFlag(ButtonState* state, uint8_t flag)
ATOMIC_BLOCK(ATOMIC_FORCEON)
{
result = flagSet((*state).flags, flag);
result = hasFlag((*state).flags, flag);
(*state).flags &= ~(flag);
}
@ -162,17 +189,18 @@ uint8_t button_is_pressed_or_repeated(ButtonState* state)
}
uint8_t button_is_released_short(ButtonState* state)
uint8_t button_is_pressed_short(ButtonState* state)
{
uint8_t result;
ATOMIC_BLOCK(ATOMIC_FORCEON)
{
result = flagSet((*state).flags, BSFReleased) &&
(!flagSet((*state).flags, BSFRepeated));
result = hasFlag((*state).flags, BSFPressed) &&
hasFlag((*state).flags, BSFReleased) &&
(!hasFlag((*state).flags, BSFRepeated));
if (result)
(*state).flags &= ~BSFReleased;
(*state).flags &= ~(BSFPressed | BSFReleased);
}
return result;
@ -184,8 +212,8 @@ uint8_t button_is_pressed_long(ButtonState* state)
ATOMIC_BLOCK(ATOMIC_FORCEON)
{
result = flagSet((*state).flags, BSFPressed) &&
flagSet((*state).flags, BSFRepeated);
result = hasFlag((*state).flags, BSFPressed) &&
hasFlag((*state).flags, BSFRepeated);
// Remove RepeatEnabled as well to prevent further repeat events
if (result)

7
Source/src/buttons.h
View File

@ -70,8 +70,11 @@ extern ButtonState buttonOption;
// every 200ms
#define REPEAT_NEXT 20
extern void buttons_init();
extern void buttons_reset();
// Returns true if sleep should be prevented
extern uint8_t buttons_active();
// Note: these functions act on events, not on the current state.
@ -84,7 +87,7 @@ extern uint8_t button_is_repeated(ButtonState* state);
extern uint8_t button_is_pressed_or_repeated(ButtonState* state);
extern uint8_t button_is_released_short(ButtonState* state);
extern uint8_t button_is_pressed_short(ButtonState* state);
extern uint8_t button_is_pressed_long(ButtonState* state);
#endif

11
Source/src/main.c
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@ -1,4 +1,5 @@
#include <stdint.h>
#include <stdlib.h>
#include <util/delay.h>
#include <ssd1306xled.h>
#include "power.h"
@ -29,7 +30,9 @@ int main()
if (powerState == On)
{
handleCurrentScreen();
sleepUntilButton(_BV(BUTTON_UP) | _BV(BUTTON_DOWN) | _BV(BUTTON_OPTION));
if (!buttons_active())
sleepUntilButton(_BV(BUTTON_UP) | _BV(BUTTON_DOWN) | _BV(BUTTON_OPTION));
}
}
}
@ -40,13 +43,11 @@ int main()
uint8_t handleGlobalInput()
{
if (button_is_released_short(&buttonOption))
if (button_is_pressed_short(&buttonOption))
{
// Toggle power
// Turn off power to the screen
if (powerState == On)
setPowerState(ManualOff);
else if (powerState == ManualOff)
setPowerState(On);
return 1;
}

24
Source/src/power.c
View File

@ -3,6 +3,7 @@
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/sleep.h>
#include <util/atomic.h>
#include <util/delay.h>
#include <ssd1306xled.h>
@ -26,7 +27,6 @@
PowerState powerState = BatteryLow;
uint16_t vcc = 0;
uint8_t screenInvalidated = 0;
// Forward declarations
@ -66,6 +66,7 @@ void checkPower()
case ManualOff:
sleepUntilButton(_BV(BUTTON_OPTION));
setPowerState(On);
break;
}
}
@ -78,8 +79,8 @@ void setPowerState(PowerState newState)
switch (newState)
{
case On:
buttons_reset();
ssd1306_send_command(SSD1306CommandOn);
//buttons_init(); TODO this doesn't help, fix it!
break;
case BatteryLow:
@ -95,22 +96,7 @@ void setPowerState(PowerState newState)
}
uint8_t getScreenInvalidated()
{
if (screenInvalidated)
{
screenInvalidated = 0;
return 1;
}
return 0;
}
void setScreenInvalidated()
{
screenInvalidated = 1;
}
// Source: http://21stdigitalhome.blogspot.nl/2014/10/trinket-attiny85-internal-temperature.html
@ -152,7 +138,7 @@ uint16_t readVCC() {
}
inline void sleepStart()
static inline void sleepStart()
{
// Turn ADC off
ADCSRA &= ~_BV(ADEN);
@ -168,7 +154,7 @@ inline void sleepStart()
}
inline void sleepEnd()
static inline void sleepEnd()
{
sleep_disable();
ADCSRA |= _BV(ADEN);

4
Source/src/power.h
View File

@ -27,8 +27,4 @@ extern void sleepUntilButton(uint8_t pinMask);
// 9 = 8 sec
extern void sleepUntilTimer(uint8_t interval);
extern uint8_t getScreenInvalidated();
extern void setScreenInvalidated();
#endif

1
Source/src/screen/counter.c
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@ -1,6 +1,7 @@
#include "counter.h"
#include <stdint.h>
#include <ssd1306xled.h>
#include "state.h"
#include "../buttons.h"

22
Source/src/screen/state.c Normal file
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@ -0,0 +1,22 @@
#include "state.h"
uint8_t screenInvalidated = 0;
uint8_t getScreenInvalidated()
{
if (screenInvalidated)
{
screenInvalidated = 0;
return 1;
}
return 0;
}
void setScreenInvalidated()
{
screenInvalidated = 1;
}

9
Source/src/screen/state.h Normal file
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@ -0,0 +1,9 @@
#ifndef __ScreenState
#define __ScreenState
#include <stdint.h>
extern uint8_t getScreenInvalidated();
extern void setScreenInvalidated();
#endif