WIDTH specifies the width of the font for all the characters defined between this WIDTH and the next WIDTH definition. If omitted, the application assumes single height font. If double height fonts are specified then the range of ASCII character values is restricted to 0.127 as the top and bottom halves of the font are stored offset by 128 positions. Single height fonts are '1' and double height fonts are '2'. The name can appear anywhere in the file. NAME defines the name for the font and is used in naming the font table variable. The directives have the following meaning: An example of the beginning of a font definition file is shown below.NAME sys_var_single Lines starting with a '.' are directives for the application, all other lines are data for the current character definition. The application will look for and input file with a '.txt' extension (fred.txt) and produce an output file with a '.h' extension (fred.h). The application is invoked from the command line and only the root name of the file is given as a command line parameter (eg "txt2font fred").
#Arduino led matrix max7219 code
Users with other Operating Systems will need to compile a version to work with their OS, using the source code supplied. The txt2font utility is a command line application that converts a text definition of the font into a data file in the right format for MD_MAX72xx to use. This will also disable user defined fonts. The support for fonts (methods and data) may be completely disabled if not required through the compile-time switch USE_LOCAL_FONT. To find a character in the font table, the library looks at the first byte (size), skips 'size'+1 bytes to the next character size byte and repeat until the last or target character is reached. In this case byte 5 of the Version 1 font is the first byte in the file. Version 0: If the 'F' is omitted then the font definition is considered a version 0 font (prior to MD_MAX72xx version 3.0.0) and the defaults are set to min ASCII 0, max ASCII 255, height 8. The least significant bit of the byte is the bottom pixel position of the character matrix (row 7). byte 6.n - each byte is a column of the character to be formed, starting with the leftmost column of the character.
#Arduino led matrix max7219 series
Version 1: Fonts are stored as a series of contiguous bytes in the following format: The most significant bit of the byte is the bottom pixel position of the character matrix (bit 7 is row 7). byte 8.n - each byte is a column of the character to be formed, starting with the leftmost column of the character.byte 7 - the number of bytes that form this character (could be zero).byte 6 - the height of the character in pixels.byte 5 - low byte of the code of last character in the table.byte 4 - high byte of the code of the last character in the table.byte 3 - low byte of the code of first character in the table.byte 2 - high byte of the code of the first character in the table.byte 1 - the version for the file format (2).Version 2: Fonts allows for up to 65535 characters in the font table:
The font builder utilities provide a convenient way to modify existing or develop alternative fonts. Alternative fonts can be specified to the library. One default font is defined as part of the library in PROGMEM memory.
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