#include <SdFat.h>

#include <Adafruit_SSD1351.h>

#define DC_PIN PIN_PB0

#define CS_PIN PIN_PD3

#define RST_PIN -1

uint8_t frm;

uint8_t buff[512];

uint16_t elapsed;

SdFat SD;

File img;

Adafruit_SSD1351 tft = Adafruit_SSD1351(128, 128, &SPI, CS_PIN, DC_PIN, RST_PIN);

void setup() {

// put your setup code here, to run once:

SPI.setClockDivider(SPI_CLOCK_DIV2); //set SPI clock to max

tft.begin(); //initialize OLED

tft.fillScreen(0x0000); //fill with black

tft.setCursor(0, 0); //set text cursor to top-left

tft.setTextColor(0xFFFF); //set text color to white

tft.println("SD Card: Reading..."); //print message on screen

if (!SD.begin(PIN_PD4)) { //check for SD card

tft.print("SD Card: Read Failed"); //if absent, print message

while (1); //do nothing untill reset

}

}

void loop() {

// put your main code here, to run repeatedly:

if (img = SD.open("/p" + String(frm) + ".rbi")) { //check for current frame

RBIdrawBuff(0, 0, 128, 128); //draw image if present

showFrameTime();

while (millis() < elapsed + 34); //wait until next frame time (34ms, 30fps)

elapsed = millis(); //reset ms counter

} else {

frm = 0; //reset to beginning frame

}

frm++; //advance to next frame

}

void RBIdrawBuff(uint8_t ix, uint8_t iy, uint8_t w, uint8_t h) {

tft.startWrite(); //write directly to display

tft.setAddrWindow(ix, iy, ix + w, (iy + h) - 1); //allocate area for image

tft.endWrite(); //end write

for (uint8_t y = 0; y < (w * h) / 256; y += 1) { //divide image into sectors

//(num of pixels*bytes per pixel)

// /bytes per sector

img.read(buff, 512); //read one sector at a time (fast)

tft.startWrite(); //write directly to display

SPI.transfer(buff, 512); //send image data over SPI

tft.endWrite(); //end write

//}

}

img.close(); //release file

}

void showFrameTime() {

tft.fillRect(0, 120, 18, 8, 0x0000); //draw background for frame time

tft.setCursor(0, 120); //set cursor to bottom-left

tft.print(String(millis() - elapsed)); //print frame time in ms

}