MAX7219 7-Segment Display

Do you like the 7-segment displays?
This board has a MAX7219, the board has eight digits connected in cascade. The board works at 5V and has SPI interface.

 
Video.

Description of library.

Initializes the MAX7219.
MAX7219_Init(void)
Example:
MAX7219_Init();

Writes a single digit.
MAX7219_WriteDigit(c, digit)

• c: Sets the 7-segment character.
• digit: Sets the digit.

Example:
MAX7219_WriteDigit('2', 5);

Writes constant numbers.
MAX7219_ConstDigit(buffer);

• buffer: Sets the numbers.

Example:
MAX7219_ConstDigit("00001234");

Writes numbers.
MAX7219_Digit(buffer);

• buffer: Sets the numbers.

Example:
unsigned int i;
char buffer2[20];
i = 25;
sprintf(buffer2, "%8d", i);
MAX7219_Digit(buffer2);

Clears the 8 digits.
MAX7219_Clear(void);
Example:
MAX7219_Clear();

Schematic.

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Nokia 5110 LCD Library

The module Nokia 5110 is a monochrome graphic LCD with 48x84 pixels. This LCD has SPI interface and blue backlight. We can buy these modules for less 2 USD.

Module Features.

• Resolution: 48 x 84 dot matrix panel.
• Power supply: 3.3V.
• Interface: SPI.
• Driver IC: PCD8544.

Video.

Request.
Email contact: armicrocontroller@gmail.com

Description of library.

Initializes the Nokia5110 module.
Nokia5110_Init(void)
Example:
Nokia5110_Init();

Sets font that will be used.
Nokia5110_SetFont(_font, _width, _height, _min, _max)

•  _font: desired font.
• _width: sets the width in units of pixels.
• _height: sets the height in units of pixels.
• _min: sets the range minimum.
• _max: sets the range maximum.

Example:
Nokia5110_SetFont(Terminal12x16, 12, 16, 32,127);

• font name : Terminal12x16
• width 12 pixels
• height 16 pixels
• range: start in character 32, end in  character 127

We can use "GLCD Font Creator" to design new fonts, symbols and icons.
Note: Only fonts with multiples of 8 pixels in height (8, 16, 24, 32 ... )

Writes a char on the Nokia5110.
Nokia5110_WriteChar(c, seg, pag)

• c: char to be written.
• seg: sets the segment. Valid values: 0..83
• pag: sets the page. Valid values: 0..5

Example:
Nokia5110_WriteChar('A', 10, 3);

Prints text constant on Nokia5110.
Nokia5110_ConstText(buffer, seg, pag)

• buffer: text to be written.
•  seg: sets the segment. Valid values: 0..83
• pag: sets the page. Valid values: 0..5

Example:
Nokia5110_ConstText("NOKIA", 0, 0);

Prints text variable on Nokia5110.
Nokia5110_Text(buffer, seg, pag)

• buffer: text to be written.
• seg: sets the segment. Valid values: 0..83
• pag: sets the page. Valid values: 0..5

Example:
unsigned char i;
char buffer2[20];
i = 22;
sprintf(buffer2, "%03d", i);
Nokia5110_Text(buffer2, 0, 3);

Prints text constant on Nokia5110 with scroll.
Nokia5110_ConstTextScroll(buffer)

• buffer: text to be written.

Example:
Nokia5110_SetFont(Terminal12x16, 12, 16, 32 , 127);
Nokia5110_ResetScroll();
while(1){
Nokia5110_ConstTextScroll("This is a new scroll function  ");
Delay_ms(50);
}

Prints text variable on Nokia5110 with scroll.
Nokia5110_TextScroll(buffer)

• buffer: text to be written.

Example:
unsigned char i;
char buffer2[20];
i = 22;
sprintf(buffer2, "%03d   ", i);
Nokia5110_SetFont(Terminal12x16, 12, 16, 32 , 127);
Nokia5110_ResetScroll();
while(1){
Nokia5110_TextScroll(buffer2);
Delay_ms(50);
}

Resets the scroll.
Nokia5110_ResetScroll(void)
This function must be called before of a new scroll function.
Example:
Nokia5110_ResetScroll();

Fills Nokia5110 memory.
Nokia5110_FillScreen(pattern)

• pattern: byte to fill Nokia5110 memory.

Example:
Nokia5110_FillScreen(0xFF);

Displays bitmap on Nokia5110.
Nokia5110_Image(buffer)

• buffer: image to be displayed.

Example:
Nokia5110_Image(truck);

Displays an image on a desired location.
Nokia5110_Icon(buffer, seg, pag, _width, _height)

• buffer: image to be displayed.
• seg: sets the segment. Valid values: 0..83
• pag: sets the page. Valid values: 0..5
• _width sets the width of the image.
• _height sets the height of the image.

Example:
Nokia5110_Icon(icon1,25,2,32,32);

Inverts the RAM memory.
Nokia5110_InvertRam(seg1, pag1, seg2, pag2)

• seg1 sets the start segment. Valid values: 0..83
• pag1 sets the start page. Valid values: 0..5
• seg2 sets the end segment. Valid values: 0..83
• pag2 sets the end page. Valid values: 0..5

Example:
Nokia5110_InvertRam(0, 0, 83, 5);

Draws a Pixel on Nokia5110.
Nokia5110_Pixel(x, y, color)

• x: x position. Valid values: 0..83
• y: y position. Valid values: 0..47
• color: color parameter. Valid values: 1,2,3

Example:
Nokia5110_Pixel(40, 40, BLACK);

Draws a Line on Nokia5110.
Nokia5110_Line(x1, y1, x2, y2, color) 

• x1: x coordinate of the line start. Valid values: 0..83
• y1: y coordinate of the line start. Valid values: 0..47
• x2: x coordinate of the line end. Valid values: 0..83
• y2: y coordinate of the line end. Valid values: 0..47
• color: color parameter. Valid values: 1,2,3

Example:
Nokia5110_Line(0, 0, 83, 47, BLACK);

Draws a rectangle on Nokia5110.
Nokia5110_Rectangle(x1, y1, x2, y2, color)

• x1: x coordinate of the upper left rectangle corner. Valid values: 0..83 
• y1: y coordinate of the upper left rectangle corner. Valid values: 0..47
• x2: x coordinate of the lower right rectangle corner. Valid values: 0..83
• y2: y coordinate of the lower right rectangle corner. Valid values: 0..47
• color: color parameter. Valid values: 1,2,3

Example:
Nokia5110_Rectangle(10, 10, 70, 40, BLACK);

Draws a circle on Nokia5110.
Nokia5110_Circle(x1, y1, radius, color)

• x1: x coordinate of the circle center. Valid values: 0..83
• y1: y coordinate of the circle center. Valid values: 0..47
• radius: radius size
• color: color parameter. Valid values: 1,2,3

Example:
Nokia5110_Circle(41, 23, 5, Black);

Connection.

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Library for 128x64 graphical display OLED. Driver SSD1306.

OK. Now you need a best display for your projects!. Yeah, this display is your best choice. We have got the update 2.0 now.
  
Module Features.

• Resolution: 128 x 64 dot matrix panel.
• Power supply: 3.3V ~ 5V
• Interface: SPI
• Driver IC: SSD1306
• Light color: Yellow+blue

Request.
Email contact: armicrocontroller@gmail.com

What version do I need?
The version 1.0 is ideal for microcontroller with few ROM memory, this library has not got graphics functions.

The version 2.0 includes graphic functions and a new scroll function, ideal for projects like mp3 players. This library needs a little more of ROM memory. This version is FREE!.

Description of library.

Initializes the OLED module.
Oled_Init(void)
Example:
Oled_Init();

Sets font that will be used.
Oled_SetFont(_font, _width, _height, _min, _max)

•  _font: desired font.
• _width: sets the width in units of pixels.
• _height: sets the height in units of pixels. 
• _min: sets the range minimum.
• _max: sets the range maximum. 

Example:
Oled_SetFont(Terminal12x16, 12, 16, 32, 127);

• font name : Terminal12x16
• width 12 pixels
• height 16 pixels
• range: start in character 32, end in  character 127

We can use "GLCD Font Creator" to design new fonts, symbols and icons.
Note: Only fonts with multiples of 8 pixels in height (8, 16, 24, 32 ... )

Writes a char on the OLED.
Oled_WriteChar(c, seg, pag)

• c: char to be written.
• seg: sets the segment. Valid values: 0..127
• pag: sets the page. Valid values: 0..7

Example
Oled_WriteChar('A', 10, 3);

Prints text constant on OLED.
Oled_ConstText(buffer, seg, pag)

• buffer: text to be written.
• seg: sets the segment. Valid values: 0..127
• pag: sets the page. Valid values: 0..7

Example:
Oled_ConstText("OLED 128x64", 0, 4);

Prints text variable on OLED.
Oled_Text(buffer, seg, pag)

• buffer: text to be written.
• seg: sets the segment. Valid values: 0..127
• pag: sets the page. Valid values: 0..7

Example:
unsigned char i;
char buffer2[20];
i = 22;
sprintf(buffer2, "%03d", i);
Oled_Text(buffer2, 0, 3);

Prints text constant on OLED with scroll.
Oled_ConstTextScroll(buffer)

• buffer: text to be written.

Example:
Oled_SetFont(Terminal12x16, 12, 16, 32 , 127);
Oled_ResetScroll();
while(1){
Oled_ConstTextScroll("This is a new scroll function  ");
Delay_ms(50);
}

Prints text variable on OLED with scroll.
Oled_TextScroll(buffer)

• buffer: text to be written.

Example:
unsigned char i;
char buffer2[20];
i = 22;
sprintf(buffer2, "%03d   ", i);
Oled_SetFont(Terminal12x16, 12, 16, 32 , 127);
Oled_ResetScroll();
while(1){
Oled_TextScroll(buffer2);
Delay_ms(50);
}

Resets the scroll.
Oled_ResetScroll(void)
This function must be called before of a new scroll function.
Example:
Oled_ResetScroll();

Fills OLED memory.
Oled_FillScreen(pattern)

• pattern: byte to fill OLED memory.

Example:
Oled_FillScreen(0xFF);

Displays bitmap on OLED.
void Oled_Image(buffer)

• buffer: image to be displayed.

Example:
Oled_Image(truck_bmp);

Displays an image on a desired location.
Oled_Icon(buffer, seg, pag, _width, _height)

• buffer: image to be displayed.
• seg: sets the segment. Valid values: 0..127
• pag: sets the page. Valid values: 0..7
• _width sets the width of the image.
• _height sets the height of the image.

Example:
Oled_Icon(icon1, 20, 3, 32, 32);

Inverts the RAM memory.
Oled_InvertRam(seg1, pag1, seg2, pag2)

• seg1 sets the start segment. Valid values: 0..127
• pag1 sets the start page. Valid values: 0..7
• seg2 sets the end segment. Valid values: 0..127
• pag2 sets the end page. Valid values: 0..7

Example:
Oled_InvertRam(0, 0, 127, 7);

Draws a Pixel on OLED.
Oled_Pixel(x, y, color)

• x: x position. Valid values: 0..127
• y: y position. Valid values: 0..63
• color: color parameter. Valid values: 1,2,3

Example:
Oled_Pixel(40, 40, BLACK);

Draws a Line on OLED.
Oled_Line(x1, y1, x2, y2, color)

• x1: x coordinate of the line start. Valid values: 0..127
• y1: y coordinate of the line start. Valid values: 0..63
• x2: x coordinate of the line end. Valid values: 0..127
• y2: y coordinate of the line end. Valid values: 0..63
• color: color parameter. Valid values: 1,2,3

Example:
Oled_Line(0, 16, 127, 50, BLACK);
 
Draws a rectangle on OLED.
Oled_Rectangle(x1, y1, x2, y2, color)

• x1: x coordinate of the upper left rectangle corner. Valid values: 0..127 
• y1: y coordinate of the upper left rectangle corner. Valid values: 0..63
• x2: x coordinate of the lower right rectangle corner. Valid values: 0..127
• y2: y coordinate of the lower right rectangle corner. Valid values: 0..63
• color: color parameter. Valid values: 1,2,3

Example:
Oled_Rectangle(16, 16, 112, 46, BLACK);
 
Draws a circle on OLED.
Oled_Circle(x1, y1, radius, color)

• x1: x coordinate of the circle center. Valid values: 0..127
• y1: y coordinate of the circle center. Valid values: 0..63
• radius: radius size
• color: color parameter. Valid values: 1,2,3

Example:
Oled_Circle(63, 31, 5, BLACK);

Schematic.

New driver V4.0 optimized for SPI and I2C interface.

 

Features.

• Easy integration.
• SPI and I2C fast refresh. 
• 4 modes of rotation. 
• MCC support.
• New functions.
  
• Microchip and STM32 support.
  

Displays supported.

• SSD1306            96x16
• SSD1306            128x32
• SSD1306            128x64
• SSD1309            128x64
• SH1106              132x64
• SH1107              64x128
• UC1609C          192x64
• ST7565R           128x64
• NOKIA5110       84x48 

 How to port the library using MPLABX with MCC.

 

 

How to select a display.

 

 How to configure the library to be used on the I2C interface.

 

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