File content as of revision 0:579e15da3834:

#include "mbed.h"
#include "Hexi_OLED_SSD1351.h"
#include "string.h"
#include "Hexi_Battery/hexi_battery.h"

char text[20];  /* Text Buffer */

/* Instantiate the SSD1351 OLED Driver */
SSD1351 oled(PTB22,PTB21,PTC13,PTB20,PTE6, PTD15); /* (MOSI,SCLK,POWER,CS,RST,DC) */

void OLED_Init()
{
    /* Get OLED Class Default Text Properties */
    oled_text_properties_t textProperties = {0};
    oled.GetTextProperties(&textProperties);

    /* Turn on the backlight of the OLED Display */
    oled.DimScreenON();

    /* Fills the screen with solid black */
    oled.FillScreen(COLOR_BLACK);

    /* Display Text at (x=7,y=0) */
    strcpy((char *) text,"BATT EXAMPLE");
    oled.Label((uint8_t *)text,7,0);

    /* Change font color to blue */
    textProperties.fontColor   = COLOR_BLUE;
    oled.SetTextProperties(&textProperties);

    /* Display text at (x=5,y=40) */
    strcpy(text,"Level:");
    oled.Label((uint8_t *)text,5,40);

    /* Set text properties to white and right aligned for the dynamic text */
    textProperties.fontColor = COLOR_WHITE;
    textProperties.alignParam = OLED_TEXT_ALIGN_RIGHT;
    oled.SetTextProperties(&textProperties);
}

int main()
{

    OLED_Init();


    HexiwearBattery battery;
    battery.sensorOn();

    while (true) {

        if (battery.isBatteryCharging()) {
            sprintf(text, "%s", "chrg");
        } else {
            sprintf(text, "%i%%", (uint8_t)battery.readLevelPercent());
        }
        oled.TextBox((uint8_t *)text,55,40,35,15); //show level value of battery

        Thread::wait(1000);
    }
}