writePixel

Write the specified color to an individual pixel at the specified row and column of LED Matrix

Syntax

writePixel(mysh,pixelLocation,pixelValue)

writePixel(mysh,pixelLocation,color)

Description

writePixel(mysh,pixelLocation,pixelValue) writes the specified pixel color value at the specified pixel location on the LED Matrix.

Specify the pixel location as 1x2 [row column] value. Specify the color as a 1x3 [R G B] value.

Note

To generate C/C++ code for this function, you must have an Embedded Coder^® license.

writePixel(mysh,pixelLocation,color) writes the specified color at the specified location on the LED Matrix.

Specify the pixel location as 1x2 [row column] value. Specify the color by name.

You can specify the following colors by name:

• ‘red’ or ‘r’

• ‘blue’ or ‘b’

• ‘green’ or ‘g’

• ‘cyan’ or ‘c’

• ‘magenta’ or ‘m’

• ‘yellow’ or ‘y’

• ‘white’ or ‘w’

• ‘black’ or ‘k’

Examples

Write Pixel Value at the Pixel Location on LED Matrix

To write to an individual LED Matrix pixel at the specified row and column position with the specified color.

writePixel(mysh,[1 1],[255 0 0]) 

Write the pixel color specified by the value [255, 0, 0] (red) to the pixel at location, [1,1].

Write Specified Color at a Pixel Location on LED Matrix

Writes the specified color at the specified location on the LED Matrix.

writePixel(mysh,[1 1],'r') 

Write the pixel color specified by the name ‘r’ (red) to the pixel at location, [1,1].

Input Arguments

mysh — Connection to SenseHAT

sensehat object

Connection to a SenseHAT board, specified as a sensehat object.

Example: mysensehat

pixelLocation — LED Matrix location at which the specified color should be written

[row column]

The row-column value at which the specified color should be written. Pixel location specified as [1 2] refers to the pixel in the first row and the second column. The row and column values can range from 1 to 8.

The following image shows the pixel locations:

Example: [1 2]

pixelValue — The pixel value that should be written at the specified location

[R G B] in the range 0–255.

Pixel value that should written at the specified location.

Example: [255, 0, 255]

color — The color that should be written at the specified location

'r' or 'red' | 'g' or 'green' | 'b' or 'blue' | 'y' or 'yellow' | 'c' or 'cyan' | 'm' or 'magenta' | 'w' or 'white' | 'k' or 'black'

The color that should written at the specified location.

Example: ‘m’

Extended Capabilities

C/C++ Code Generation

Generate C and C++ code using MATLAB® Coder™.

• You can deploy writePixel on the Raspberry Pi^® hardware in MATLAB^® Online™.

• To generate C/C++ code for this function, you must have an Embedded Coder license. For more information on selecting the right product stack according to your development goals, see Product Stack for Raspberry Pi Blockset.

Version History

Introduced in R2016b