solution for : `epd290bw` not declared for AVR arduino devices

[uddin-a]

When we are trying the example DEPG0290BxS75AFxX_BW.ino the compiler gives us the following error

/home/####/Arduino/libraries/e-ink-master/examples/DEPG0290BxS75AFxX_BW/DEPG0290BxS75AFxX_BW.ino: In function 'void setup()':
DEPG0290BxS75AFxX_BW:38:5: error: 'epd290bw' was not declared in this scope
   38 |     epd290bw.EPD_Init(); //Electronic paper initialization
      |     ^~~~~~~~
exit status 1
'epd290bw' was not declared in this scope

after a quick review, we can see that in the third elif for AVR devices (line 29) the object DEPG0290BxS75AFxX_BW epd290bw was not declared which created the error.

To fix the error I have added the declaration of the object and added the CLK_PIN to 13

Here is what the file looks like after the change :

/*
DEPG0290BxS75AFxX_BW is a 2.9 inch black and white screen
Display Resolution 128(H)×296(V)
*/
#include "DEPG0290BxS75AFxX_BW.h"
#include "picture.h"

#define UNDEFINED -1
#ifdef CubeCell_Board //AB01
    #define FREQUENCY 2000000

    DEPG0290BxS75AFxX_BW epd290bw(GPIO1, GPIO2, GPIO3, GPIO5, UNDEFINED, SPI_NUM_0, FREQUENCY);//reset_pin, dc_pin, cs_pin, busy_pin, clk_pin, spi_num, frequency
#elif defined( ESP32 )
    #define RST_PIN         16
    #define DC_PIN          22
    #define CS_PIN          18
    #define BUSY_PIN        23
    #define CLK_PIN         5

    DEPG0290BxS75AFxX_BW epd290bw(RST_PIN, DC_PIN, CS_PIN, BUSY_PIN, CLK_PIN);//reset_pin, dc_pin, cs_pin, busy_pin, clk_pin
#elif defined( ESP8266 )
    #define RST_PIN         16
    #define DC_PIN          4
    #define CS_PIN          15
    #define BUSY_PIN        5
    #define CLK_PIN         14

    DEPG0290BxS75AFxX_BW epd290bw(RST_PIN, DC_PIN, CS_PIN, BUSY_PIN, CLK_PIN);//reset_pin, dc_pin, cs_pin, busy_pin, clk_pin
#elif defined ( AVR )
    #define RST_PIN         8
    #define DC_PIN          9
    #define CS_PIN          10
    #define BUSY_PIN        7
    #define CLK_PIN         13
    //#define SDI             11 // Pin MOSI

    DEPG0290BxS75AFxX_BW epd290bw(RST_PIN, DC_PIN, CS_PIN, BUSY_PIN, CLK_PIN);//reset_pin, dc_pin, cs_pin, busy_pin, clk_pin
#endif

void setup() {
    Serial.begin(115200);
    epd290bw.EPD_Init(); //Electronic paper initialization
    epd290bw.EPD_ALL_image(gImage_290image_bw);	//Refresh the picture in full screen

    // delay(1000);
    // epd290bw.EPD_WhiteScreen_Black();
    // delay(1000);
    // epd290bw.EPD_WhiteScreen_White();
    epd290bw.EPD_DeepSleep();  //Enter deep sleep	

}
void loop() {

}