From: Andrea Manni Date: Thu, 12 Mar 2015 00:09:57 +0000 (+0100) Subject: PWM X-Git-Url: http://git.piffa.net/web?a=commitdiff_plain;h=f7cdba7df419dcde095f911daa92deb9dcd283ec;p=sketchbook_andrea PWM --- diff --git a/advanced_projects/led_PWM_logical_analyzer_demo/led_PWM_logical_analyzer_demo.ino b/advanced_projects/led_PWM_logical_analyzer_demo/led_PWM_logical_analyzer_demo.ino index e8c4cc8..723a7bf 100644 --- a/advanced_projects/led_PWM_logical_analyzer_demo/led_PWM_logical_analyzer_demo.ino +++ b/advanced_projects/led_PWM_logical_analyzer_demo/led_PWM_logical_analyzer_demo.ino @@ -4,17 +4,18 @@ Connect pin ~11 to a logic analyzer and a multimeter and witness the power of the built-in PWM generator. + Usage: change pausa from 3000 (demostration) to 20 for sampling. BTW: Logic comes from: http://downloads.saleae.com/betas/1.1.34/Logic+1.1.34+(64-bit).zip */ -int led = 11; -int pausa = 3000; // or 20 when sampling +int led = 9; +int pausa = 3000; // 3000 for demo or 20 when sampling void setup() { pinMode(led, OUTPUT); - delay(4000); + delay(3000); } void loop() @@ -36,7 +37,7 @@ void loop() analogWrite(led, c) ; delay(2 ); } - exit(0); + //exit(0); } diff --git a/basic/blinks/blink_1_variabili/blink_1_variabili.ino b/basic/blinks/blink_1_variabili/blink_1_variabili.ino index d828bc9..7a5a46a 100644 --- a/basic/blinks/blink_1_variabili/blink_1_variabili.ino +++ b/basic/blinks/blink_1_variabili/blink_1_variabili.ino @@ -1,3 +1,5 @@ +// //////////// +// Commento iniziale /* Blink v1 @@ -9,18 +11,24 @@ This example code is in the public domain. */ +// ////////////// +// Dichiarazione variabili + // Pin 13 has an LED connected on most Arduino boards. // give it a name: int led = 13; int breve = 200; // Variabile richiambile nel corso dell'esecuzione int lunga = 1000; -// the setup routine runs once when you press reset: +// ///////////////// +// Setup: eseguita una volta sola void setup() { // initialize the digital pin as an output. pinMode(led, OUTPUT); } +// /////////////// +// loop // the loop routine runs over and over again forever: void loop() { digitalWrite(led, HIGH); // turn the LED on (HIGH is the voltage level) diff --git a/basic/blinks/blink_2_funzioni/blink_2_funzioni.ino b/basic/blinks/blink_2_funzioni/blink_2_funzioni.ino index 210de4d..e1a6066 100644 --- a/basic/blinks/blink_2_funzioni/blink_2_funzioni.ino +++ b/basic/blinks/blink_2_funzioni/blink_2_funzioni.ino @@ -1,3 +1,6 @@ + +// //////////// +// Commento iniziale /* Blink v2 @@ -6,6 +9,8 @@ This example code is in the public domain. */ +// ////////////// +// Dichiarazione variabili // Pin 13 has an LED connected on most Arduino boards. // give it a name: @@ -13,19 +18,22 @@ int led = 13; int breve = 200; // Variabile richiambile nel corso dell'esecuzione int lunga = 1000; -// the setup routine runs once when you press reset: +// ///////////////// +// Setup void setup() { // initialize the digital pin as an output. pinMode(led, OUTPUT); } -// the loop routine runs over and over again forever: +// /////////////// +// loop void loop() { rapido(); // accende e spegne rapidamente il LED rapido(); // accende e spegne rapidamente il LED lento(); // accende e spegne lentamente il LED } +// /////////////// // Funzioni create dall'utente: void rapido() { @@ -49,4 +57,3 @@ void lento() { } - diff --git a/basic/buttons/button_2_serial_debug/button_2_serial_debug.ino b/basic/buttons/button_2_serial_debug/button_2_serial_debug.ino index f0b41d5..e4866bf 100644 --- a/basic/buttons/button_2_serial_debug/button_2_serial_debug.ino +++ b/basic/buttons/button_2_serial_debug/button_2_serial_debug.ino @@ -9,14 +9,11 @@ - http://lab.piffa.net/schemi/button_1_schem.png */ -// Pin 13 has an LED connected on most Arduino boards. -// give it a name: -int led = 13; +int led = 12; int input = 2; // the setup routine runs once when you press reset: void setup() { - // initialize the digital pin as an output. pinMode(led, OUTPUT); // Il PIN e' attivato come output pinMode(input, INPUT); // Il PIN e' attivato come output diff --git a/basic/buttons/button_state_4_state/button_state_4_state.ino b/basic/buttons/button_state_4_state/button_state_4_state.ino index 87ceffa..ef6ae05 100644 --- a/basic/buttons/button_state_4_state/button_state_4_state.ino +++ b/basic/buttons/button_state_4_state/button_state_4_state.ino @@ -4,28 +4,29 @@ Legge lo stato di un input */ -int led = 13; +int led = 13; // Definizione delle variabili int buttonPin = 2; -int statoAttuale; // variable for reading the pin status -int ultimoStato; // variable to hold the last button state + // Dichiarazione di variabili +int statoAttuale; // Variabile per leggere lo stato del bottone +int ultimoStato; // Variabile per registrare l'ultimo stato del bottone int ledStatus; // varabile per mantenere lo stato del led void setup() { - pinMode(buttonPin, INPUT); // Set the switch pin as input + pinMode(buttonPin, INPUT); pinMode(led, OUTPUT); - Serial.begin(9600); // Set up serial communication at 9600bps - ultimoStato = digitalRead(buttonPin); // read the initial state - ledStatus = 0; + Serial.begin(9600); // Attiva la comunicazione seriale a 9600bps + ultimoStato = digitalRead(buttonPin); // Prima lettura del bottone + ledStatus = 0; // Il LED viene inpostato come spento } void loop(){ statoAttuale = digitalRead(buttonPin); // read input value and store it in var - delay(20); // riduce l'effetto bounce - if (statoAttuale != ultimoStato) { // the button state has changed! - if (statoAttuale == HIGH) { // check if the button is pressed + delay(20); // riduce l'effetto bounce + if (statoAttuale != ultimoStato) { // lo stato del bottone e' cambiato + if (statoAttuale == HIGH) { // il bottone e' stato provato Serial.println("Button premuto"); - ledStatus = !ledStatus ; // Inverte lo stato del LED + ledStatus = !ledStatus ; // Inverte lo stato del LED // ledStatus = 1 - ledStatus ; // Forma analoga Serial.print("Stato del LED: "); // DEBUG @@ -33,7 +34,7 @@ void loop(){ } } - ultimoStato = statoAttuale; // save the new state in our variable + ultimoStato = statoAttuale; // save the new state in our variable digitalWrite(led, ledStatus); // setta il led allo stato richiesto } diff --git a/basic/led_PWM_simple/led_PWM_simple.ino b/basic/led_PWM_simple/led_PWM_simple.ino deleted file mode 100644 index 254ad86..0000000 --- a/basic/led_PWM_simple/led_PWM_simple.ino +++ /dev/null @@ -1,32 +0,0 @@ -/* - LED for PWM - - LEd PWM routine with a for loop, ascending and descending. - - */ - -int led = 11; -int c = 0; - - -void setup() -{ - pinMode(led, OUTPUT); - -} - -void loop() -{ - for ( c = 0; c < 255 ; c++) { - analogWrite(led, c) ; - delay(5 ); - } - // Now reverse - for ( c = 255; c > 0 ; c--) { - analogWrite(led, c) ; - delay(5 ); - } -} - - - diff --git a/basic/pwm_1_while_byte/pwm_1_while_byte.ino b/basic/pwm_1_while_byte/pwm_1_while_byte.ino new file mode 100644 index 0000000..de1a994 --- /dev/null +++ b/basic/pwm_1_while_byte/pwm_1_while_byte.ino @@ -0,0 +1,27 @@ +/*pwm_ + Fade + + PWM per un LED: aumentare progressivamente la luminosita'. + */ + +byte led = 9 ; // Il pin ~9 e' abilitato al PWM +byte brightness = 0; // Valore iniziale per il PWM del LED + +// the setup routine runs once when you press reset: +void setup() { + pinMode(led, OUTPUT); // Il PIN nove va dichiarato come un OUTPUT +} + +void loop() { + analogWrite(led, brightness++); // La funziona analogWrite utilizza il PWM + // a 8 bit integrato nel MCU: simula un serie di valori intermedi + // nell'intervallo discreto con minimo 0 (spento) e massimo 255 (acceso). + delay(10); +} + +/* Domande: + +1. Come fare a invertire la dissolvenza diminuendo la luminosita'? +2. Provare a far salire e poi scendere la luminosita' + + diff --git a/basic/pwm_2_for_loop/pwm_2_for_loop.ino b/basic/pwm_2_for_loop/pwm_2_for_loop.ino new file mode 100644 index 0000000..12e6e78 --- /dev/null +++ b/basic/pwm_2_for_loop/pwm_2_for_loop.ino @@ -0,0 +1,36 @@ +/* + LED for PWM + + PWM per un LED: aumentare progressivamente la luminosita'. + Utilizzo di un ciclo iterativo: for loop + + */ + +int led = 9; // Pin per il PWM + +void setup() +{ + pinMode(led, OUTPUT); + +} + +void loop() +{ + for ( i = 0; i < 255 ; i++) { // Operatore ternario, 3 argomenti: + /* 1. definizione iteratore + 2. limite iteratore + 3. incremento operatore + */ + analogWrite(led, i) ; + delay(5 ); + } + // Ora l'inverso + for ( c = 255; c > 0 ; c--) { + analogWrite(led, c) ; + delay(5 ); + } +} + + + + diff --git a/basic/simplest_pwm_byte/simplest_pwm_byte.ino b/basic/simplest_pwm_byte/simplest_pwm_byte.ino deleted file mode 100644 index fc7658d..0000000 --- a/basic/simplest_pwm_byte/simplest_pwm_byte.ino +++ /dev/null @@ -1,27 +0,0 @@ -/* - Fade - - This example shows how to fade an LED on pin 9 - using the analogWrite() function. - - This example code is in the public domain. - */ - -byte led = 9 ; // the pin that the LED is attached to - -byte brightness = 0; // how bright the LED is - -// the setup routine runs once when you press reset: -void setup() { - // declare pin 9 to be an output: - pinMode(led, OUTPUT); -} - -// the loop routine runs over and over again forever: -void loop() { - // set the brightness of pin 9: - analogWrite(led, brightness++); - delay(10); -} - -