53 lines
3.0 KiB
C++
53 lines
3.0 KiB
C++
/*
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2_Inkplate_Low_Power example for e-radionica.com Inkplate 6
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For this example you will need USB cable and Inkplate 6.
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Select "Inkplate 6(ESP32)" from Tools -> Board menu.
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Don't have "Inkplate 6(ESP32)" option? Follow our tutorial and add it:
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https://e-radionica.com/en/blog/add-inkplate-6-to-arduino-ide/
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This example will show you how you can use low power functionality of Inkplate board.
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In deep sleep, whole board will consume about 25uA from battery.
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Inkplate will wake every 20 seconds change content on screen.
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NOTE: Because we are using deep sleep, everytime the board wakes up, it starts program from begining.
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Also, whole content from RAM gets erased, so you CAN NOT use partial updates.
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Want to learn more about Inkplate? Visit www.inkplate.io
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Looking to get support? Write on our forums: http://forum.e-radionica.com/en/
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15 July 2020 by e-radionica.com
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*/
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#include "Inkplate.h" //Include Inkplate library to the sketch
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#include "picture1.h" //Include .h files of 3 pictures. All three pictures were converted using LCD Image Converter software
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#include "picture2.h"
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#include "picture3.h"
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#include "driver/rtc_io.h" //ESP32 library used for deep sleep and RTC wake up pins
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const uint8_t *pictures[] = {pic1, pic2, pic3}; //This array of pinters holds address of every picture in the memory,
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//so we can easly select it by selecting index in array
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#define uS_TO_S_FACTOR 1000000 //Conversion factor for micro seconds to seconds
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#define TIME_TO_SLEEP 20 //How long ESP32 will be in deep sleep (in seconds)
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RTC_DATA_ATTR int slide = 0;
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Inkplate display(INKPLATE_3BIT); //Create an object on Inkplate library and also set library into 3 Bit mode (Grayscale)
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void setup()
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{
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display.begin(); //Init Inkplate library (you should call this function ONLY ONCE)
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display.clearDisplay(); //Clear frame buffer of display
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display.drawBitmap3Bit(0, 0, pictures[slide], 800, 600); //Display selected picture at location X=0, Y=0. All three pictures have resolution of 800x600 pixels
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display.display(); //Refresh the screen with new picture
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slide++; //Update counter for pictures. With this variable, we choose what picture is going to be displayed on screen
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if (slide > 2)
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slide = 0; //We do not have more than 3 images, so roll back to zero
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rtc_gpio_isolate(GPIO_NUM_12); //Isolate/disable GPIO12 on ESP32 (only to reduce power consumption in sleep)
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esp_sleep_enable_timer_wakeup(TIME_TO_SLEEP * uS_TO_S_FACTOR); //Activate wake-up timer -- wake up after 20s here
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esp_deep_sleep_start(); //Put ESP32 into deep sleep. Program stops here.
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}
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void loop()
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{
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//Nothing! If you use deep sleep, whole program should be in setup() because each time the board restarts, not in a loop()! loop() must be empty!
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}
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