Loading a bitmap image from a micro SD card and display it on a 0.95 color OLED via an Arduino UNO or Nano

Posted by: @maxairedale

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I have the hardware hooked up as seen here but without the resistor on the CS pin. With the resistor on the CS pin, the display is very dim

The display is dim because 5V connection to the VCC of SD1331 is missing in your hook up and the CS line supplied the the VCC via the input protection diode inside the chip. The CS must have a resistor as the diagram to avoid high currents.

@moty22 Have another look

Ron, this project is from my website and I'm trying to advise maxairedale a possible solution his problem.

@moty22  Is his wiring as depicted in the picture I posted?

According to that diagram, 5V IS properly connected. If his wiring is different, then that might explain his problem.

I realize it has been almost a year since I started this thread, but I have not forgotten about it.  I moved on to some other projects that were a greater priority. 

I want to thank everyone who made suggestions on how to fix the issue.  

@moty22
Thank you for providing the information on your website.

Gary

One last update.

I have fixed the problem.  The ground pin of the factory-installed header pins was not soldered. 🤬 🤬 🤬 🤬  

Posted by: @maxairedale

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This may have been addressed here before, but I can't find it. If it has please point me to it.

Furthermore, if this is in the wrong category please move it to the correct category.

I can draw to the OLED in a different project by using the different functions from the Adafruit_GFX.h library along with the Adafruit SSD1331.h and the SPI.h libraries.

 

What I want to do is to load a bitmap image from a micro SD card and display it on a 0.95 color OLED

 

Hardware being used

1. Arduino Nano (generic)

2. 0.95 color SPI OLED that requires the Adafruit SSD1331 OLED Driver Library for Arduino (Adafruit_SSD1331.h) and the Adafruit GFX Library (Adafruit_GFX.h) library.

   -- attachment is not available --

3. Micro SD Card Module

   -- attachment is not available --

    

Hook Up

I have the hardware hooked up as seen here but without the resistor on the CS pin. With the resistor on the CS pin, the display is very dim. This hook-up image was included in the sketch mentioned below description.

-- attachment is not available --

 Code found online

I found this sketch (oled_picture_frame.ino) online at http://moty22.co.uk/sd_bmp.php (ARDUINO SD COLOR OLED PICTURE FRAME) and uploaded it.

Notice that the sketch does not use the two Adifruit libraries.

/*
SD OLED 1331 picture frame
by moty22.co.uk

SD card SPI:
* MOSI - pin 11
* MISO - pin 12
* CLK - pin 13
* CS - pin 10
*/

#include <SPI.h>
#include <SD.h>

#define CS 7 // pins Arduino to TFT
#define DC 9
#define SDA 1
#define SCK 4
#define RST 8

File f1;

void setup() {
pinMode(SDA, OUTPUT); //tft SDA
pinMode(CS, OUTPUT); //tft CS
pinMode(SCK, OUTPUT); //tft SCK
pinMode(RST, OUTPUT); //tft RESET
pinMode(DC, OUTPUT); //tft AO/DC
SD.begin(10);
//TFT USART-SPI
UBRR0 = 0;
UCSR0C = (1<<UMSEL01)|(1<<UMSEL00)|(1<<UCPHA0)|(1<<UCPOL0); // MSPI mode and SPI data mode 3.
UCSR0B = (1<<RXEN0)|(1<<TXEN0); // Enable receiver and transmitter.
UBRR0 = 8; // Set baud rate. must be at the end
oled_init();
}

void loop() {
if(SD.exists("1.bmp")){
f1 = SD.open("1.bmp");
display();
delay(10000);
}

if(SD.exists("2.bmp")){
f1 = SD.open("2.bmp");
display();
delay(10000);
}

if(SD.exists("3.bmp")){
f1 = SD.open("3.bmp");
display();
delay(10000);
}

if(SD.exists("4.bmp")){
f1 = SD.open("4.bmp");
display();
delay(10000);
}
if(SD.exists("5.bmp")){
f1 = SD.open("5.bmp");
display();
delay(10000);

}

if(SD.exists("6.bmp")){
f1 = SD.open("6.bmp");
display();
delay(10000);
}
}

void display(){
unsigned int i=0;
unsigned char c;
command(0x15); // Column addr set
command(0);
command(95);
command(0x75); // row addr set
command(0);
command(63);
while (f1.available()) {
++i;
c=f1.read();
if(i>67){send_data(c);}
}
f1.close();
}

unsigned char spi(unsigned char data) // send character over spi - talking
{
while ( !( UCSR0A & (1<<UDRE0)) ); /* Wait for empty transmit buffer */
UDR0 = data; /* Put data into buffer, sends the data */
while ( !(UCSR0A & (1<<RXC0)) ); /* Wait for data to be received */
return UDR0; /* return received data from buffer */
}

void command(unsigned char cmd)
{
digitalWrite(DC, LOW); // Command Mode
digitalWrite(CS, LOW); // Select the LCD (active low)
spi(cmd); // set up data on bus
digitalWrite(CS, HIGH); // Deselect LCD (active low)
}

void send_data(unsigned char data)
{
digitalWrite(DC, HIGH); // data mode
digitalWrite(CS, LOW); // chip selected
spi(data); // set up data on bus
digitalWrite(CS, HIGH); // deselect chip
}

void send_color(unsigned int color)
{
send_data(color>>8);
send_data(color);
}

void oled_init(void)
{
unsigned char i;
digitalWrite(RST, HIGH); //hardware reset
delay(200);
digitalWrite(RST, LOW);
delay(10);
digitalWrite(RST, HIGH);
delay(10);
command(0xAE); //display off
command(0xA0); //remap
command(0x72); //RGB=0x72, BGR=0x76, 24bits=B2 A2=fliped (0b10100010)
command(0xA1); // CMD STARTLINE
command(0x0);
command(0xA2); // CMD DISPLAYOFFSET
command(0x0);
command(0xA4); // CMD NORMALDISPLAY
command(0xA8); // CMD SETMULTIPLEX
command(0x3F); // 0x3F 1/64 duty
command(0xAD); // CMD SETMASTER
command(0x8E);
command(0xB0); // CMD POWERMODE
command(0x0B);
command(0xB1); // CMD PRECHARGE
command(0x31);
command(0xB3); // CMD CLOCKDIV
command(0xF0); // 7:4 = Oscillator Frequency, 3:0 = CLK Div Ratio
// (A[3:0]+1 = 1..16)
command(0x8A); // CMD PRECHARGEA
command(0x64);
command(0x8B); // CMD PRECHARGEB
command(0x78);
command(0x8C); // CMD PRECHARGEC
command(0x64);
command(0xBB); // CMD PRECHARGELEVEL
command(0x3A);
command(0xBE); // CMD VCOMH
command(0x3E);
command(0x87); // CMD MASTERCURRENT 06
command(0x15);
// command(0x81); // CMD CONTRASTA 91
// command(0xFF);
// command(0x82); // CMD CONTRASTB 50
// command(0xFF);
// command(0x83); // CMD CONTRASTC 7D
// command(0xFF);
//command(0xA4); //Normal display on
command(0xAF); //Main screen turn on
}

 

 

It draws the bitmap (I have only one) and instantly clears the screen. There is a ten-second delay (delay(10000)) within every if statement inside the void loop() so there's a black display. When I commented out the delay at line 53 the image keeps reloading which I had expected.

 

The sketch was written to be a slide show and that is fine.

Maybe Bill will do a video on this topic.

Maxairedale

I can see that you have only included

#include <SPI.h>
#include <SD.h>

Is there any reason why you are not including Adafruit_GFX.h,Adafruit_SSD1331.h, Adafruit_ImageReader.h etc.? I think you need these too to show the image from SD card. 

I can see that you have only included

#include <SPI.h>
#include <SD.h>

Is there any reason why you are not including Adafruit_GFX.h,Adafruit_SSD1331.h, Adafruit_ImageReader.h etc.? I think you need these too to show the image from SD card.  

I realize that I'm a bit slow in replying to your question; please forgive my tardiness.

The sketch that I included from my original post was copied and pasted from the link I included in that post.  I do not know why the person who wrote the sketch did not include the two libraries that you mentioned.

I made my project work.  I found a different example and was able to modify it for my needs.  Currently, I don't have access to sketch, but I believe I did use the two libraries in question.

Thank you for taking the time to reply to my original post.