Author | Rob Hamerling, Copyright © 2014..2014, all rights reserved. |
Adapted-by | |
Compiler | 2.4q2 |
See the description of max7219.jal.
- This library is designed for max7219 modules controlling an 8x8 LED matrix, the features of the MAX7219 chips for 7-segment displays are disabled. - The terms 'row' and 'column' are ambiguous: depending on the orientation of the module! This library calls the LEDs which can be written with a single write operation a column. Writing a row of a single module requires 8 writes and the cache being active. See the procedures max7219_display_col() and max7219_display_row().
max7219_display_blink(byte in times, byte in halfperiod)
max7219_init()
max7219_display_byte_bin(byte in num, byte in col, byte in data)
max7219_display_row(byte in num, byte in row, bit in state)
max7219_display_test(byte in period)
max7219_display_col(byte in num, byte in col, bit in state)
max7219_display_bit(byte in num, byte in col, byte in row, bit in state)
max7219_display_clear()
max7219_display_intensity(byte in intensity)
_max7219_write(byte in num, byte in addr, byte in data)
_max7219_write_all(byte in addr, byte in data)
max7219_display_blink(byte in times, byte in halfperiod)
Title: Blink whole module a number of times at a given speed Input: - number of times the display should blink off and on (byte) time in 0.1 seconds of the on and off periods (duty cycle is 50%) Notes: All 'on' LEDs of all modules will blink simultaneously.
max7219_init()
Title: Initialize all modules with max7219 Input: (none) Notes: Must be called before any other operation involving the display
max7219_display_byte_bin(byte in num, byte in col, byte in data)
Title: Display a column (byte, 8 bits) of one module Input: - module number (byte, 0..7) column number (byte, 0..7) with bit pattern to be displayed (byte)
max7219_display_row(byte in num, byte in row, bit in state)
Title: Display a row of leds (all leds in a row on or off) in one module Input: - module number (byte, 0..7) row number (byte, 0..7) led state (bit, true or false, resp. on or off) Notes: - Writes 8 columns of 1 module.
max7219_display_test(byte in period)
Title: Put all MAX7219 modules in test mode for some time. Input: test period (byte, number of 0.1 seconds) Notes: All leds will be in maximum intensity during the specified period
max7219_display_col(byte in num, byte in col, bit in state)
Title: Display a column of leds (all leds in a column on or off) Input: - module number (byte, 0..7) column number (byte, 0..7) led state (true or false, resp. on or off)
max7219_display_bit(byte in num, byte in col, byte in row, bit in state)
Title: Set or reset a single LED Input: - module number (byte, 0..7) column number (byte, 0..7) row number (byte, 0..7) led state (bit, true or false, on or off) Notes: - Writes 1 column of one module
max7219_display_clear()
Title: Clear display (all LEDs off) Input: (none) Notes: All LEDs of all modules will be cleared (write 8 times the same column of every module))
max7219_display_intensity(byte in intensity)
Title: Set LED intensity Input: LED intensity (range 0..15) Notes: All LEDs of all modules will have the same luminosity
_max7219_write(byte in num, byte in addr, byte in data)
Title: transfer addr + data to a specific max7219 in the chain Input: - module number (0..7) address (command) byte data byte Notes: Data/command is for 1 module, others in the chain receive a NOP. The last module in the chain is addressed first.
_max7219_write_all(byte in addr, byte in data)
Title: transfer addr + data to all MAX7219s in the chain Input: - addr data Notes: All modules receive the same addr + data
12f1840 | 12f1840_max7219_n_spi_sw.jal |
12f1840 | 12f1840_max7219_n_spi_hw.jal |
12f683 | 12f683_max7219_n_spi_sw.jal |