Benny Andersen / microbitOLED

displaying on SSD1306, 128x64 pixels OLED

Dependencies:   microbit

example_OLED.cpp

Committer:
bvirk
Date:
2020-02-25
Revision:
12:b4d5e007640e
Parent:
6:c69f08f464b5

File content as of revision 12:b4d5e007640e:

#include "MicroBit.h"
#include "MicroBitPin.h"

#include "common.h"


void  example_OLED() {
    oled.init();
    
    oled.puts("*** VOLTMETER ****\n\n");
    char spin[] = "|/-\\";
    uint8_t si=0;
    float oldVoltage=0;
    while(true) {
        uint16_t samples =uBit.io.P0.getAnalogValue();
        
        float voltage = 3.3*samples/1023;
        int8_t dir = voltage - oldVoltage > 0.01 
            ? 1
            : voltage - oldVoltage < -0.01
                ? -1
                : 0;
        if (dir) {
            si = (si+dir) & 3;
            oldVoltage=voltage;
            }
        oled.printf("\r%c %03.2f volt ",spin[si],voltage);
        
        }    
}