lexus2K SSD1306 I2C text speed test

gistfile1.txt

//https://github.com/lexus2k/ssd1306

#include <Wire.h>
#include "ssd1306.h"
long I2C_clock=2500000;
long pot;
char buf[10];
unsigned long thisMicros = 0;
unsigned long lastMicros = 0;


void setup()   {
        ssd1306_128x64_i2c_init();
        ssd1306_fillScreen( 0x00 );
        Wire.setClock(I2C_clock);
}

void loop()
{
        pot=analogRead(5);// pot on A5 to play with the I2C clock
        I2C_clock=map(pot,1023,0,100L,4000L);
        I2C_clock=I2C_clock*1000L;
        Wire.setClock(I2C_clock);
        thisMicros = micros();
        ssd1306_clearScreen();
        //ssd1306_fillScreen( 0x00 );
        itoa(thisMicros - lastMicros,buf,10);
        ssd1306_charF12x16(0, 0, buf,STYLE_NORMAL);
        itoa(I2C_clock,buf,10);
        ssd1306_charF12x16(0, 2, buf,STYLE_NORMAL);
        itoa(pot,buf,10);
        ssd1306_charF12x16(0, 4, buf,STYLE_NORMAL);

        lastMicros = thisMicros;

}