File content as of revision 3:2b362d164405:

 /**
*
*Copyright (c) 2011 Thomas Olsson.
*
*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:
* 
*The above copyright notice and 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 WS2801_H
#define WS2801_H

#include "mbed.h"
#include "HTML_color.h"


/** WS2801 class, controlling LED strips or arrays like this http://www.sparkfun.com/products/10312
*
* the WS2801 IC's are 5V but works well connected directly to mbed IO pins.
*
* You need a 5V power supply capable of about 2A to light up a 32 led strip, do NOT power from mbed(usb).
*
* the required reset delay is a blocking wait(), it can be lowered (or set to 0) if you want to use the
* time for executing code instead, data sheet says 500us but i found it need at least 800us.
*
* Example:
* @code
* 
* code exalple goes here
* 
* @endcode
 */
class ws2801 
{
public:
    /** Create a new ws2801 object
    * 
    *     
    * @param CKI clock pin
    * @param SDI data  pin
    * @param STRIP_LENGTH number of ws2801 IC's i strip or array defaults to 32
    * @param reset_delay delay in us to allow latching data defaults to 800
    * @returns nothing   
    */
    ws2801(PinName CKI, PinName SDI, int STRIP_LENGTH = 32, int reset_delay = 800);
    /** write RGB color data to strip or array
    * 
    * color data for each LED is 3 bytes int the order of rrggbb.
    * array must have STRIP_LENGTH number of elements
    *
    * @param strip_colors array of color data
    */
    void post(int *strip_colors);
    /** clears the array or strip (all off)
    */    
    void clear(void);
    /** set level of the entire array 0-100%
    * 
    * at low levels the colors may change because R,G or B
    * reaches 0.
    *
    * @param level level in percent
    * @returns current level
    */
    int level(int level=0);
    /** get/set reset/write delay
    * 
    * mainly for experimenting with reset values without recompiling,
    * leave at default to begin with & then lower to get faster execution.
    *
    * @param delay delay in us
    * @returns delay in us
    */    
    int delay(uint32_t reset_delay=800);
  
private:  
    DigitalOut _CKI;
    DigitalOut _SDI;
    int _STRIP_LENGTH;
    int _level;
    int _reset_delay;
};

#endif