Adafruit_Trellis.h

00001 #ifndef _BV
00002 #define _BV(bit) (1 << (bit))
00003 #endif
00004 
00005 #include "mbed.h"
00006 
00007 #define LED_ON  1
00008 #define LED_OFF 0
00009 #define HT16K33_BLINK_OFF    0
00010 #define HT16K33_BLINK_2HZ    1
00011 #define HT16K33_BLINK_1HZ    2
00012 #define HT16K33_BLINK_HALFHZ 3
00013 
00014 
00015 /**
00016  * A class for Adafruit trellis
00017  */
00018 class Adafruit_Trellis {
00019 public:
00020     /**
00021      * Create a new trellis object
00022      */
00023     Adafruit_Trellis(void);
00024 
00025     /**
00026      * Initialize the trellis controller
00027      * @param _wire Address of an I2C master object
00028      * @param _addr Slave address of the trellis controller
00029      */
00030     void begin(I2C *_wire, uint8_t _addr);
00031 
00032     /**
00033      * Set brightness(PWM) of LEDs
00034      * @param b Brightness level from 1 to 16 with 16 being the brightest
00035      */
00036     void setBrightness(uint8_t b);
00037 
00038     /**
00039      * Set blink rate of LEDs
00040      * @param b Blink rate defined as macros
00041      */
00042     void blinkRate(uint8_t b);
00043 
00044     /**
00045      * Write to LEDs after set and clear status of LEDs
00046      */
00047     void writeDisplay(void);
00048 
00049     /**
00050      * Set all LEDs to off
00051      */
00052     void clear(void);
00053     
00054     /**
00055      * Check status of LED
00056      * @param  x LED index (1-16)
00057      * @return 1 for on, 0 for off
00058      */
00059     bool isLED(uint8_t x);
00060 
00061     /**
00062      * Set LED status to on
00063      * @param x LED index (1-16)
00064      */
00065     void setLED(uint8_t x);
00066 
00067     /**
00068      * Set LED status to off
00069      * @param x LED index (1-16)
00070      */
00071     void clrLED(uint8_t x);
00072     
00073     /**
00074      * Check if button is pressed
00075      * @param  k button index (1-16)
00076      * @return 1 for pressed, 0 for not pressed
00077      */
00078     bool isKeyPressed(uint8_t k);
00079 
00080     /**
00081      * Check if button was pressed
00082      * @param  k button index (1-16)
00083      * @return 1 for pressed, 0 for not pressed
00084      */
00085     bool wasKeyPressed(uint8_t k);
00086 
00087     /**
00088      * Update all buttons' status, need to be called before checking buttons' status
00089      * @return 1 for any button has been switched, 0 otherwise
00090      */
00091     bool readSwitches(void);
00092 
00093     /**
00094      * Check if button was just pressed
00095      * @param  k button index (1-16)
00096      * @return  1 for pressed, 0 for not pressed
00097      */
00098     bool justPressed(uint8_t k);
00099 
00100     /**
00101      * Check if button was just released
00102      * @param  k button index (1-16)
00103      * @return  1 for released, 0 for not released
00104      */
00105     bool justReleased(uint8_t k);
00106     
00107     uint16_t displaybuffer[8];
00108     
00109     void init(uint8_t a);
00110     
00111 private:
00112     uint8_t keys[6], lastkeys[6];
00113     
00114     uint8_t i2c_addr;
00115     char cmd[20];
00116     I2C *wire;
00117 };