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Added comments for PCInt vs Int pin usage

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pyr0ball 2019-01-09 05:07:05 -08:00
parent a3c0cbbf98
commit 2e6061d491
1 changed files with 7 additions and 5 deletions
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10
ATmega48_Piezo_Sensor/ATmega48_Piezo_Sensor.ino
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@ -25,8 +25,6 @@
http://www.circuitbasics.com/arduino-ohm-meter/ http://www.circuitbasics.com/arduino-ohm-meter/
*/ */
//#include <avr/interrupt.h>
//#include <PinChangeInterrupt.h>
// Set variables for working parameters // Set variables for working parameters
const int TRG_OUT = 9; // LED and Z-Min trigger output connected to digital pin 10 const int TRG_OUT = 9; // LED and Z-Min trigger output connected to digital pin 10
@ -34,7 +32,7 @@ const int TRG_OUT = 9; // LED and Z-Min trigger output connected to digi
//#define Z_TRG 0 // the piezo is connected to INT0 / digital pin 2 //#define Z_TRG 0 // the piezo is connected to INT0 / digital pin 2
const byte Z_TRG = 2; const byte Z_TRG = 2;
int ERR_LED = 3; // LED will blink if optimal voltage range cannot be achieved int ERR_LED = 3; // LED will blink if optimal voltage range cannot be achieved
int InitCount = 10; // Number of times to blink the LED on start int InitCount = 6; // Number of times to blink the LED on start
int V_FOLLOW_PIN = A0; // Sense pin to check first amp stage voltage output int V_FOLLOW_PIN = A0; // Sense pin to check first amp stage voltage output
int VADJ_SENSE_PIN = A1; // Sense pin to check comparator stage voltage int VADJ_SENSE_PIN = A1; // Sense pin to check comparator stage voltage
int TRG_DUR = 120; // duration of the Z-axis pulse sent, in ms int TRG_DUR = 120; // duration of the Z-axis pulse sent, in ms
@ -71,7 +69,11 @@ void setup() {
pinMode(VADJ_R3, INPUT); // declare input to break pull to ground pinMode(VADJ_R3, INPUT); // declare input to break pull to ground
Serial.begin(9600); Serial.begin(9600);
// Uncomment the following lines to use PCInt pins instead of hardware interrupt
//#include <PinChangeInterrupt.h>
//attachPCINT(digitalPinToPCINT(Z_TRG), pulse, FALLING); //attachPCINT(digitalPinToPCINT(Z_TRG), pulse, FALLING);
// Uncomment the followoing line to use hardware interrupt pin
attachInterrupt(digitalPinToInterrupt(Z_TRG), pulse, FALLING); attachInterrupt(digitalPinToInterrupt(Z_TRG), pulse, FALLING);
Serial.println("Initializing Piezo Sensor..."); Serial.println("Initializing Piezo Sensor...");
@ -159,7 +161,7 @@ void loop() {
digitalWrite(ERR_LED, BlinkState); digitalWrite(ERR_LED, BlinkState);
digitalWrite(TRG_OUT, BlinkState); digitalWrite(TRG_OUT, BlinkState);
delay(150); delay(150);
BlinkCount = --BlinkCount; --BlinkCount;
} }
// Check voltage of first and second stages and compare against thresholds // Check voltage of first and second stages and compare against thresholds