$ pio init -b digispark-tiny
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October 26, 2019 05:50
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Implement Capacitive Touch Sensor (C-T Method) with Digispark
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| #include <Arduino.h> | |
| #define PIN_CP_HS 0 | |
| #define PIN_CP_LS 1 | |
| void blink(uint16_t ms) { | |
| analogWrite(4, 10); | |
| delay(ms); | |
| analogWrite(4, 0); | |
| delay(ms); | |
| } | |
| void setup() { | |
| pinMode(PIN_CP_HS, OUTPUT); | |
| pinMode(PIN_CP_LS, OUTPUT); | |
| pinMode(4, OUTPUT); | |
| blink(200); | |
| } | |
| void loop() { | |
| // reset | |
| pinMode(PIN_CP_LS, OUTPUT); | |
| pinMode(PIN_CP_HS, OUTPUT); | |
| digitalWrite(PIN_CP_LS, LOW); | |
| digitalWrite(PIN_CP_HS, LOW); | |
| delay(1); | |
| uint16_t counter = 0; | |
| while(true) { | |
| // charge | |
| pinMode(PIN_CP_LS, INPUT); | |
| digitalWrite(PIN_CP_LS, LOW); | |
| digitalWrite(PIN_CP_HS, HIGH); | |
| pinMode(PIN_CP_HS, OUTPUT); | |
| // transfer | |
| pinMode(PIN_CP_HS, INPUT); | |
| digitalWrite(PIN_CP_HS, LOW); | |
| pinMode(PIN_CP_LS, OUTPUT); | |
| digitalWrite(PIN_CP_LS, LOW); | |
| counter++; | |
| if(digitalRead(PIN_CP_HS)) { | |
| if(counter < 30) { // Adjust as you need | |
| blink(counter * 10); | |
| } | |
| break; | |
| } | |
| } | |
| } |
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| #include <Arduino.h> | |
| #define PIN_CP_HS 0 | |
| #define PIN_CP_LS 2 | |
| #define PIN_ALERT 4 | |
| #define PIN_LED 1 | |
| void setup() { | |
| pinMode(PIN_CP_HS, OUTPUT); | |
| pinMode(PIN_CP_LS, OUTPUT); | |
| pinMode(PIN_ALERT, OUTPUT); | |
| pinMode(PIN_LED, OUTPUT); | |
| digitalWrite(PIN_LED, HIGH); | |
| delay(200); | |
| digitalWrite(PIN_LED, LOW); | |
| } | |
| int8_t detected = 0; | |
| void loop() { | |
| // reset | |
| pinMode(PIN_CP_LS, OUTPUT); | |
| pinMode(PIN_CP_HS, OUTPUT); | |
| digitalWrite(PIN_CP_LS, LOW); | |
| digitalWrite(PIN_CP_HS, LOW); | |
| delayMicroseconds(10); | |
| uint16_t counter = 0; | |
| while(true) { | |
| // charge | |
| pinMode(PIN_CP_LS, INPUT); | |
| digitalWrite(PIN_CP_LS, LOW); | |
| digitalWrite(PIN_CP_HS, HIGH); | |
| pinMode(PIN_CP_HS, OUTPUT); | |
| // transfer | |
| pinMode(PIN_CP_HS, INPUT); | |
| digitalWrite(PIN_CP_HS, LOW); | |
| pinMode(PIN_CP_LS, OUTPUT); | |
| digitalWrite(PIN_CP_LS, LOW); | |
| counter++; | |
| if(digitalRead(PIN_CP_HS)) { | |
| if(counter < 500) { | |
| detected++; | |
| } else { | |
| detected--; | |
| } | |
| if(detected >= 5) { | |
| detected = 0; | |
| digitalWrite(PIN_ALERT, HIGH); | |
| digitalWrite(PIN_LED, HIGH); | |
| } else if(detected <= -5) { | |
| detected = 0; | |
| digitalWrite(PIN_ALERT, LOW); | |
| digitalWrite(PIN_LED, LOW); | |
| } | |
| break; | |
| } | |
| } | |
| } |
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