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unused inputs configure as input pull-up for low power

This commit is contained in:
Glyn Hudson 2016-09-29 16:28:28 +01:00 committed by GitHub
parent cb91b6f830
commit 528faca1e2
1 changed files with 13 additions and 1 deletions
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14
firmware/src/src.ino
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@ -101,6 +101,8 @@ const byte DIP_switch2= 8;
const byte pulse_countINT= 1; // INT 1 / Dig 3 Screw Terminal Block Number 4 on emonTH V1.5 - Change to INT0 DIG2 on emonTH V1.4
const byte pulse_count_pin=3; // INT 1 / Dig 3 Screw Terminal Block Number 4 on emonTH V1.5 - Change to INT0 DIG2 on emonTH V1.4
#define ONE_WIRE_BUS 17 // D19 emonTH V1.5
cost byte DHT22_PWR= 6; // Not used in emonTH V2.0, 10K resistor R1 connects DHT22 pins
cost byte DHT22_DATA= 16; // Not used in emonTH V2.0, 10K resistor R1 connects DHT22 pins.
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
@ -134,7 +136,17 @@ void setup() {
//################################################################################################################################
pinMode(LED,OUTPUT); digitalWrite(LED,HIGH); // Status LED on
// Unused pins configure as input pull up for low power
// http://electronics.stackexchange.com/questions/43460/how-should-unused-i-o-pins-be-configured-on-atmega328p-for-lowest-power-consumpt
// port map: https://github.com/openenergymonitor/emonth2/blob/master/hardware/readme.md
pinMode(DHT22_PWR, INPUT_PULLUP); //DHT22 not used on emonTH V2.
pinMode(DHT22_DATA, INPUT_PULLUP); //DHT22 not used on emonTH V2
pinMode(14, INPUT_PULLUP);
pinMode(20, INPUT_PULLUP);
pinMode(21, INPUT_PULLUP);
pinMode(4, INPUT_PULLUP);
//READ DIP SWITCH POSITIONS - LOW when switched on (default off - pulled up high)
pinMode(DIP_switch1, INPUT_PULLUP);
pinMode(DIP_switch2, INPUT_PULLUP);