MAX7219.h

/*
 *    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 MAX7219_h
#define MAX7219_h

#include <SPI.h>

class MAX7219 {
public:
    MAX7219(SPI* spi, int numDevices = 1);


    void clearDisplay(int addr);


    int getDeviceCount();


    void setChar(int digit, char value, bool dp=false, int addr = 0);


    void setColumn(int col, uint8_t value, int addr = 0);


    void setDigit(int digit, uint8_t value, bool dp=false, int addr = 0);


    void setIntensity(int intensity, int addr = 0);


    void setLed(int row, int col, bool state, int addr = 0);


    void setNumber(uint32_t number, int addr = 0);


    void setRow(int row, uint8_t value, int addr = 0);


    void setScanLimit(int limit, int addr = 0);


    void shutdown(bool status, int addr = 0);

private:
    /* Send out a single command to the device */
    void spiTransfer(int addr, uint8_t opcode, uint8_t data);

    /* We keep track of the led-status for all 8 devices in this array */
    uint8_t status[64];

    /* The maximum number of devices we use */
    int maxDevices;
    SPI* spi;

};

#endif  // MAX7219.h