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- /*
- * LedControl.h - A library for controling Leds with a MAX7219/MAX7221
- * Copyright (c) 2007 Eberhard Fahle
- *
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use,
- * copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following
- * conditions:
- *
- * This permission notice shall be included in all copies or
- * substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
- * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- */
- #ifndef LedControl_h
- #define LedControl_h
- #if (ARDUINO >= 100)
- #include <Arduino.h>
- #else
- #include <WProgram.h>
- #endif
- /*
- * Segments to be switched on for characters and digits on
- * 7-Segment Displays
- */
- /*const static byte charTable[128] = {
- B01111110,B00110000,B01101101,B01111001,B00110011,B01011011,B01011111,B01110000,
- B01111111,B01111011,B01110111,B00011111,B00001101,B00111101,B01001111,B01000111,
- B00000000,B00000000,B00000000,B00000000,B00000000,B00000000,B00000000,B00000000,
- B00000000,B00000000,B00000000,B00000000,B00000000,B00000000,B00000000,B00000000,
- B00000000,B00000000,B00000000,B00000000,B00000000,B00000000,B00000000,B00000000,
- B00000000,B00000000,B00000000,B00000000,B10000000,B00000001,B10000000,B00000000,
- B01111110,B00110000,B01101101,B01111001,B00110011,B01011011,B01011111,B01110000,
- B01111111,B01111011,B00000000,B00000000,B00000000,B00000000,B00000000,B00000000,
- B00000000,B01110111,B00011111,B00001101,B00111101,B01001111,B01000111,B00000000,
- B00110111,B00000000,B00000000,B00000000,B00001110,B00000000,B00000000,B00000000,
- B01100111,B00000000,B00000000,B00000000,B00000000,B00000000,B00000000,B00000000,
- B00000000,B00000000,B00000000,B00000000,B00000000,B00000000,B00000000,B00001000,
- B00000000,B01110111,B00011111,B00001101,B00111101,B01001111,B01000111,B00000000,
- B00110111,B00000000,B00000000,B00000000,B00001110,B00000000,B00000000,B00000000,
- B01100111,B00000000,B00000000,B00000000,B00000000,B00000000,B00000000,B00000000,
- B00000000,B00000000,B00000000,B00000000,B00000000,B00000000,B00000000,B00000000
- };*/
- class LedControl {
- private :
- /* The array for shifting the data to the devices */
- byte spidata[16];
- /* Send out a single command to the device */
- void spiTransfer(int addr, byte opcode, byte data);
- /* We keep track of the led-status for all 8 devices in this array */
- byte status[64];
- /* Data is shifted out of this pin*/
- int SPI_MOSI;
- /* The clock is signaled on this pin */
- int SPI_CLK;
- /* This one is driven LOW for chip selectzion */
- int SPI_CS;
- /* The maximum number of devices we use */
- int maxDevices;
- public:
- /*
- * Create a new controler
- * Params :
- * dataPin pin on the Arduino where data gets shifted out
- * clockPin pin for the clock
- * csPin pin for selecting the device
- * numDevices maximum number of devices that can be controled
- */
- LedControl(int dataPin, int clkPin, int csPin, int numDevices=1);
- /*
- * Gets the number of devices attached to this LedControl.
- * Returns :
- * int the number of devices on this LedControl
- */
- int getDeviceCount();
- /*
- * Set the shutdown (power saving) mode for the device
- * Params :
- * addr The address of the display to control
- * status If true the device goes into power-down mode. Set to false
- * for normal operation.
- */
- void shutdown(int addr, bool status);
- /*
- * Set the number of digits (or rows) to be displayed.
- * See datasheet for sideeffects of the scanlimit on the brightness
- * of the display.
- * Params :
- * addr address of the display to control
- * limit number of digits to be displayed (1..8)
- */
- void setScanLimit(int addr, int limit);
- /*
- * Set the brightness of the display.
- * Params:
- * addr the address of the display to control
- * intensity the brightness of the display. (0..15)
- */
- void setIntensity(int addr, int intensity);
- /*
- * Switch all Leds on the display off.
- * Params:
- * addr address of the display to control
- */
- void clearDisplay(int addr);
- /*
- * Set the status of a single Led.
- * Params :
- * addr address of the display
- * row the row of the Led (0..7)
- * col the column of the Led (0..7)
- * state If true the led is switched on,
- * if false it is switched off
- */
- void setLed(int addr, int row, int col, boolean state);
- /*
- * Set all 8 Led's in a row to a new state
- * Params:
- * addr address of the display
- * row row which is to be set (0..7)
- * value each bit set to 1 will light up the
- * corresponding Led.
- */
- void setRow(int addr, int row, byte value);
- /*
- * Set all 8 Led's in a column to a new state
- * Params:
- * addr address of the display
- * col column which is to be set (0..7)
- * value each bit set to 1 will light up the
- * corresponding Led.
- */
- void setColumn(int addr, int col, byte value);
- /*
- * Display a hexadecimal digit on a 7-Segment Display
- * Params:
- * addr address of the display
- * digit the position of the digit on the display (0..7)
- * value the value to be displayed. (0x00..0x0F)
- * dp sets the decimal point.
- */
- void setDigit(int addr, int digit, byte value, boolean dp);
- /*
- * Display a character on a 7-Segment display.
- * There are only a few characters that make sense here :
- * '0','1','2','3','4','5','6','7','8','9','0',
- * 'A','b','c','d','E','F','H','L','P',
- * '.','-','_',' '
- * Params:
- * addr address of the display
- * digit the position of the character on the display (0..7)
- * value the character to be displayed.
- * dp sets the decimal point.
- */
- void setChar(int addr, int digit, char value, boolean dp);
- };
- #endif //LedControl.h
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