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Merge pull request #274 from dbuezas/Better_wdt_lib
Better wdt lib and lgt low power lib
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49 changes: 49 additions & 0 deletions
49
lgt8f/libraries/WDT/examples/wdt_interrupt/wdt_interrupt.ino
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| Original file line number | Diff line number | Diff line change |
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| /******************************************************** | ||
| * This example shows how the watchdog interrupt works. * | ||
| * About every 4 seconds there will be a wdt interrupt. * | ||
| * If you uncomment the line containing wdt_reset() the * | ||
| * sketch will not detect wdt interrupt signal. * | ||
| ******************************************************** | ||
| * When writing an Interrupt Service Routine (ISR): * | ||
| * Keep short,don't use delay(), don't do serial prints * | ||
| * Make variables shared with the main code volatile * | ||
| * Read this: https://gammon.com.au/interrupts * | ||
| ********************************************************/ | ||
| #include <WDT.h> | ||
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| volatile boolean isrflag; | ||
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| void setup() { | ||
| pinMode(LED_BUILTIN, OUTPUT); | ||
| digitalWrite(LED_BUILTIN, LOW); | ||
| Serial.begin(19200); | ||
| Serial.println(F("Skech started.")); | ||
| isrflag = false; | ||
| wdt_ienable(WTO_4S); | ||
| } | ||
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| void loop() { | ||
| int n = 0; | ||
| do { | ||
| Serial.print(F(" Elapsed time: ")); | ||
| Serial.print(n); | ||
| Serial.println(" s"); | ||
| delay(999); | ||
| if (digitalRead(LED_BUILTIN)) | ||
| digitalWrite(LED_BUILTIN, LOW ); | ||
| else | ||
| digitalWrite(LED_BUILTIN, HIGH); | ||
| if (isrflag) { | ||
| Serial.println(F("--There was a wdt interrupt.--")); | ||
| isrflag = false; | ||
| wdt_ienable(WTO_4S); | ||
| } | ||
| //wdt_reset(); | ||
| } while( n++ < 1000 ); | ||
| } | ||
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| ISR (WDT_vect) | ||
| { | ||
| isrflag = true; | ||
| wdt_reset(); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| /**************************************************** | ||
| * This example shows how the watchdog reset works. * | ||
| * It restarts every 4 seconds. If you uncomment * | ||
| * the line containing wdt_reset() the sketch will * | ||
| * run continuously. * | ||
| ****************************************************/ | ||
| #include <WDT.h> | ||
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| void setup() { | ||
| pinMode(LED_BUILTIN, OUTPUT); | ||
| digitalWrite(LED_BUILTIN, LOW); | ||
| Serial.begin(19200); | ||
| Serial.println(F("Skech started.")); | ||
| wdt_enable(WTO_4S); | ||
| } | ||
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| void loop() { | ||
| int n = 0; | ||
| do { | ||
| Serial.print(F("Elapsed time: ")); | ||
| Serial.print(n); | ||
| Serial.println(" s"); | ||
| delay(499); | ||
| digitalWrite(LED_BUILTIN, HIGH); | ||
| delay(499); | ||
| digitalWrite(LED_BUILTIN, LOW); | ||
| //wdt_reset(); | ||
| } while( n++ < 1000 ); | ||
| } |
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59 changes: 59 additions & 0 deletions
59
lgt8f/libraries/lgt_LowPower/examples/adcNoiseReduction/adcNoiseReduction.ino
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| /******************************************************************************* | ||
| * This example shows how to use Noise Reduction mode. ( In short Noise * | ||
| * Reduction mode stops the core and most of the pheripherials clocks and * | ||
| * an ADC conversion starts automatically. ) * | ||
| * The example periodically read A0 input. The sleep time is shorter than the * | ||
| * specified because the ADC wakes it up at the end of the conversion. This * | ||
| * library clears the WDT immediately after waking up. * | ||
| * This example also show how to clear ADIF flag before entering sleep mode. * | ||
| * * | ||
| * - You should pay attention to that reading any analalog input with ADC * | ||
| * ( analogRead() ) the intrerrupt flag of the ADC ( ADIF ) is set. * | ||
| * This is causes the MCU wakes up immediately from any sleep mode. To avoid * | ||
| * waking up immediately must clear the ADIF bit in ADCSRA before sleep. * | ||
| *******************************************************************************/ | ||
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| #include "lgt_LowPower.h" | ||
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| int avalue; | ||
| int measuredpin = A0; | ||
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| void setup() | ||
| { | ||
| // No setup is required for LowPower library | ||
| Serial.begin(9600); | ||
| pinMode(LED_BUILTIN, OUTPUT); | ||
| pinMode(measuredpin,INPUT); | ||
| analogReference(INTERNAL1V024); | ||
| // analogReadResolution(12); | ||
| avalue = analogRead(measuredpin); // Sets the ADMUX for the later use | ||
| } | ||
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| void loop() | ||
| { | ||
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| // Clear ADC interrupt flag before sleep guarantees waiting until the | ||
| // conversion is completed. | ||
| ADCSRA |= (1 << ADIF); | ||
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| // Enter idle state for 8 s with the rest of peripherals turned off | ||
| // LGT8Fx8P | ||
| LowPower.adcNoiseReduction(SLEEP_8S, ADC_ON, TIMER2_OFF); | ||
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| // Do something here. Example: Read sensor, data logging, data transmission. | ||
| digitalToggle(LED_BUILTIN); | ||
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| // Reading directly the ADC register the resolution will always 12 bits | ||
| // regardless of what was set with the analogReadResolution(). | ||
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| avalue = ADC; // Reading the result made while sleeping. | ||
| avalue -= (avalue >> 7); // Gain-error correction of LGT8F328P | ||
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| Serial.print(F("Measued value: ")); | ||
| Serial.print(avalue/4); | ||
| Serial.println(F(" mV")); | ||
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| // Waiting for the end of data transmission. The Noise Reduction sleep mode | ||
| // stops serial port during next ADC conversion. | ||
| Serial.flush(); | ||
| } |
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