ws2801/ws2801.cpp

/*
 * ws2801.cpp
 *
 * Created: 26-12-16 21:57:10
 *  Author: Adrien
 */
#define F_CPU 16000000UL
#include <avr/io.h>
#include <util/delay.h>
#include <stdlib.h>

#include "ws2801.h"

/*
	L'espace mémoir à envoyer au ci est constituer comme ça :
ciN 	|-----------0-----------||-----------1-----------||...||-----------N-----------| Ci numéro
coulB	|R7...R0|G7...G0|B7...B0||R7...R0|G7...G0|B7...B0||...||R7...R0|G7...G0|B7...B0| Valeur Couleurs bit n
coul	|--RED--|-GREEN-|--BLUE-||--RED--|-GREEN-|--BLUE-||...||--RED--|-GREEN-|--BLUE-| Valeur Couleurs
bitN	|7.....0|7.....0|7.....0||7.....0|7.....0|7.....0||...||7.....0|7.....0|7.....0| Bit n
t[] 	|---0---|---1---|---2---||---3---|---4---|---5---||...||-3*N+0-|-3*N+1-|-3*N+3-| Emplacement dans le tableau

Pour l'envois, il faut commencer par le bit 7 !

*/
main()
{
	return 0;
}
	ws2801::ws2801(uint8_t pin_clk, uint8_t pin_data, uint8_t *port, uint8_t nbr_ci)
	{
		this->pin_clk = pin_clk;
		this->pin_data = pin_data;
		this->port = port;
		this->nbr_ci = nbr_ci;
		PORTB;
		data = (uint8_t*)calloc(3*nbr_ci, 1);
		ddr = port-1;
		*ddr |= (1<<pin_clk)|(1<<pin_data);
	}
	void ws2801::conf(uint8_t pin_clk, uint8_t pin_data, uint8_t *port, uint8_t nbr_ci)
	{
		this->pin_clk = pin_clk;
		this->pin_data = pin_data;
		this->port = port;
		this->nbr_ci = nbr_ci;
		data = (uint8_t*)realloc(data,3*nbr_ci);
		ddr = port-1;
		*ddr |= (1<<pin_clk)|(1<<pin_data);
	}
	void ws2801::toSend(uint8_t LEDn, uint8_t val, Color couleur)
	{
		*(data+32*LEDn+couleur) = val;
	}
	void ws2801::toSend(uint8_t LEDn, uint8_t val)
	{
		*(data+LEDn) = val;
	}
	void ws2801::send()
	{
		sendRaw(data, 3*nbr_ci);
	}
	void ws2801::sendRaw(uint8_t *data,uint8_t size)
	{
		int i,j,m;
		for(i=0;i<size;i++)
		{
			for(j=0,m=0x80;j<8;j++)
			{
				*port &= ~(_BV(pin_clk));
				if(!i&&!j)
					_delay_us(500);
				*port = (*port&(~(_BV(pin_data))))|((data[i]&m)?_BV(pin_data):0);
				if(m==0x01)
					m=0x80;
				else
					m>>=1;
			}
		}
	}