bzr branch
http://bzr.ed.am/elec/propeller-clock
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16
by edam
finished first revision of propeller-clock code (can display clock and test); added Bounce library |
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// Please read Bounce.h for information about the liscence and authors |
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#include "WProgram.h" |
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#include "Bounce.h" |
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Bounce::Bounce(uint8_t pin,unsigned long interval_millis) |
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{
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interval(interval_millis); |
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previous_millis = millis(); |
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state = digitalRead(pin); |
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this->pin = pin; |
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} |
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void Bounce::write(int new_state) |
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{
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this->state = new_state; |
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digitalWrite(pin,state); |
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} |
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void Bounce::interval(unsigned long interval_millis) |
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{
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this->interval_millis = interval_millis; |
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this->rebounce_millis = 0; |
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} |
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void Bounce::rebounce(unsigned long interval) |
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{
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this->rebounce_millis = interval; |
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} |
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int Bounce::update() |
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{
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if ( debounce() ) {
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rebounce(0); |
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return stateChanged = 1; |
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} |
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// We need to rebounce, so simulate a state change |
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if ( rebounce_millis && (millis() - previous_millis >= rebounce_millis) ) {
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previous_millis = millis(); |
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rebounce(0); |
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return stateChanged = 1; |
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} |
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return stateChanged = 0; |
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} |
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unsigned long Bounce::duration() |
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{
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return millis() - previous_millis; |
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} |
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int Bounce::read() |
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{
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return (int)state; |
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} |
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// Protected: debounces the pin |
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int Bounce::debounce() {
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uint8_t newState = digitalRead(pin); |
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if (state != newState ) {
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if (millis() - previous_millis >= interval_millis) {
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previous_millis = millis(); |
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state = newState; |
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return 1; |
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} |
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} |
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return 0; |
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} |
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// The risingEdge method is true for one scan after the de-bounced input goes from off-to-on. |
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bool Bounce::risingEdge() { return stateChanged && state; }
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// The fallingEdge method it true for one scan after the de-bounced input goes from on-to-off. |
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bool Bounce::fallingEdge() { return stateChanged && !state; }
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