#include "PCA9555.h"

uint8_t pca9555writedata_config[10];//ÔÝ´æ¼Ä´æÆ÷ËùÓÐÅäÖõÄÊý×é
uint8_t pca9555writedata_output[10];
void IIC_gpio_pca_init(void)
{
    io_pin_mux_set(SDA_PIN, IO_FUNC0);
    io_pin_mux_set(SCL_PIN, IO_FUNC0);

    gpio_pin_set_dir(SDA_PIN , GPIO_DIR_OUT, 1);
//		io_open_drain_set(SDA_PIN, 1);
    io_pull_set(SDA_PIN , IO_PULL_UP, IO_PULL_UP_LEVEL2);//Êä³ö¸ß×è̬

    gpio_pin_set_dir(SCL_PIN , GPIO_DIR_OUT, 1);
    //io_open_drain_set(SCL_PIN, 1);
    io_pull_set(SCL_PIN , IO_HIGH_Z, IO_PULL_UP_NONE);
}

void IIC2_pca_Start(void)
{
//		IIC2_SDA_OUT();     //sdaÏßÊä³ö
    SDA_1;
		delay_us(10);
    SCL_1;
		delay_us(10);
    SDA_0;//START:when CLK is high,DATA change form high to low
    delay_us(10);
}
void IIC_pca_Ready(void)
{
   
		SCL_1;	
  	delay_us(10);
		SDA_1;
   	delay_us(10);
}
//²úÉúIICÍ£Ö¹ÐźÅ
void IIC2_pca_Stop(void)
{

    SDA_0;//STOP:when CLK is high DATA change form low to high
	
    delay_us(10);
    SCL_1;
		delay_us(10);
    SDA_1;//·¢ËÍI2C×ÜÏß½áÊøÐźÅ
    delay_us(10);
}
//µÈ´ýÓ¦´ðÐźŵ½À´
//·µ»ØÖµ£º1£¬½ÓÊÕÓ¦´ðʧ°Ü
//        0£¬½ÓÊÕÓ¦´ð³É¹¦
uint8_t IIC2_Wait_pca_Ack(void)
{
    uint8_t ucErrTime=0;
//  IIC2_SDA_IN();     
	gpio_pin_set_dir(SDA_PIN , GPIO_DIR_IN, 1); //SDAÉèÖÃΪÊäÈëµÈ´ý½ÓÊն˵ÄÓ¦´ðÐźÅ
    SDA_1;
    delay_us(6);
    SCL_1;
    delay_us(6);

    while(IIC2_READ_SDA)
    {
        ucErrTime++;
        if(ucErrTime>250)
        {
            IIC2_pca_Stop();
            return 1;
        }
    }
    gpio_pin_set_dir(SDA_PIN , GPIO_DIR_OUT, 1);
    SCL_0;//ʱÖÓÊä³ö0
    return 0;
		
}
//²úÉúACKÓ¦´ð
void IIC2_pca_send_Ack(void)
{
    SDA_0;
    delay_us(10);
    SCL_1;//¶ÁÈ¡SDAµçƽΪµÍÔòÓÐÓ¦´ð
    delay_us(10);
    SCL_0;
}
//²»²úÉúACKÓ¦´ð
void IIC2_pca_send_NAck(void)
{
    SDA_1;
    delay_us(10);
    SCL_1;//¶ÁÈ¡SDAµçƽΪ¸ßÔòÎÞÓ¦´ðÐźÅ
    delay_us(10);
    SCL_0;
}
//IIC·¢ËÍÒ»¸ö×Ö½Ú,WRITE
//·µ»Ø´Ó»úÓÐÎÞÓ¦´ð
//1£¬ÓÐÓ¦´ð
//0£¬ÎÞÓ¦´ð
void IIC2_Send_pca_Byte(uint8_t txd)
{
    uint8_t t;
//		IIC2_SDA_OUT();
    SCL_0;//À­µÍʱÖÓ¿ªÊ¼Êý¾Ý´«Êä
    for(t=0; t<8; t++)
    {
        if((txd&0x80)>>7)
        {
            SDA_1;
        }
        else
        {
            SDA_0;
        }
        txd <<= 1;
        delay_us(10);
        SCL_1;
        delay_us(10);
        SCL_0;
        delay_us(10);
    }
		SDA_1;//ÐÂÔösdaÀ­¸ß
		delay_us(10);
}

//¶Á1¸ö×Ö½Ú£¬ack=1ʱ£¬·¢ËÍACK£¬ack=0£¬·¢ËÍnACK,²»ÊÇÒ»ÑùµÄ
uint8_t IIC2_Read_pca_Byte(unsigned char ack)
{
    unsigned char i,receive=0;
//	IIC2_SDA_IN();//SDAÉèÖÃΪÊäÈë
    for(i=0; i<8; i++ )
    {
        SCL_0;
        delay_us(10);
        SCL_1;
        receive<<=1;
        if(IIC2_READ_SDA)receive++;
        delay_us(5);
    }
    if (!ack)
        IIC2_pca_send_NAck();//·¢ËÍnACK
    else
        IIC2_pca_send_Ack(); //·¢ËÍACK
    return receive;
}


/*********************************************************
//дpca9555µÚ¶þ²ãÇý¶¯£¬¿É¸¨ÖúÂß¼­²»ÆÆ»µ×îµ×²ãÇý¶¯
  addr    оƬµØÖ·£¬0x40±íʾµÚÒ»¸öоƬµØÖ·
  low_byte  дÈëоƬµÄÇ°°ËλÊý¾Ý
  high_byte  дÈëоƬµÄÇ°ºóλÊý¾Ý
*********************************************************/
//дpca9555µÚÒ»²ã£¬×îµ×²ãÇý¶¯
void IIC_Write_Pca9555(unsigned char addr,unsigned char reg_addr,unsigned char low_byte,unsigned char high_byte)
{
	  IIC2_pca_Start();
	  IIC2_Send_pca_Byte(addr & 0xfe);
	  IIC2_Wait_pca_Ack();
	  IIC2_Send_pca_Byte(reg_addr);
	  IIC2_Wait_pca_Ack();
	  IIC2_Send_pca_Byte(low_byte);
	  IIC2_Wait_pca_Ack();
	  IIC2_Send_pca_Byte(high_byte);
	  IIC2_Wait_pca_Ack();
	  IIC2_pca_Stop();
}

void IIC_Read_Pca9555(uint8_t addr,uint8_t reg_addr,uint8_t* pBuffer,uint16_t num)
{
	  IIC2_pca_Start();
	  IIC2_Send_pca_Byte(addr & 0xfe);
	  IIC2_Wait_pca_Ack();
	  IIC2_Send_pca_Byte(reg_addr);
	  IIC2_Wait_pca_Ack();

	  IIC2_pca_Start();
	  IIC2_Send_pca_Byte(addr | 0x01);
	  IIC2_Wait_pca_Ack();
	  while (num)
	  {
		    *pBuffer = IIC2_Read_pca_Byte(1);
			if (num == 1)
			{
				IIC2_pca_send_NAck();
			}
			else
			{ 
				IIC2_pca_send_Ack();
			}	
		    pBuffer++;
			num--;
	  }
	  IIC2_pca_Stop();
}

/*дpca9555µÚ¶þ²ãÇý¶¯£¬¿É¸¨ÖúÂß¼­²»ÆÆ»µ×îµ×²ãÇý¶¯,¸Ãº¯ÊýĬÈÏÅäÖÃÊä³ö¼Ä´æÆ÷
  addr    оƬµØÖ·£¬0x40±íʾµÚÒ»¸öоƬµØÖ·
  data_L  дÈëоƬµÄÇ°°ËλÊý¾Ý
  data_H  дÈëоƬµÄÇ°ºóλÊý¾Ý
*/
void PCA9555_write_output_port_data(unsigned char addr,unsigned char data_L,unsigned char data_H)
{                        
		IIC_Write_Pca9555(addr,PCA9555_REG_OUT0,data_L,data_H);//	PCA9555_REG_OUT0 Êä³ö¼Ä´æÆ÷0µØÖ·
		pca9555writedata_output[0]=	data_L;//±£´æ¸Ã´ÎÉèÖÃÊý¾Ý
		pca9555writedata_output[0]=	data_H;	
}

/*дpca9555µÚ¶þ²ãÇý¶¯£¬¿É¸¨ÖúÂß¼­²»ÆÆ»µ×îµ×²ãÇý¶¯,¸Ãº¯ÊýĬÈÏÅäÖÃÊä³ö¼Ä´æÆ÷
  addr    оƬµØÖ·£¬0x40±íʾµÚÒ»¸öоƬµØÖ·
  data_L  дÈëоƬµÄÇ°°ËλÊý¾Ý
  data_H  дÈëоƬµÄÇ°ºóλÊý¾Ý
*/
void PCA9555_write_config_port_data(unsigned char addr,unsigned char data_L,unsigned char data_H)
{                        
		IIC_Write_Pca9555(addr,PCA9555_REG_CFG0,data_L,data_H);//	PCA9555_REG_OUT0 Êä³ö¼Ä´æÆ÷0µØÖ· 
		pca9555writedata_config[0]=	data_L;//±£´æ¸Ã´ÎÉèÖÃÊý¾Ý
		pca9555writedata_config[0]=	data_H;
}

/*¶Ápca9555µÚ¶þ²ãÇý¶¯£¬¿É¸¨ÖúÂß¼­²»ÆÆ»µ×îµ×²ãÇý¶¯
  addr     оƬµØÖ·£¬0x40±íʾµÚÒ»¸öоƬµØÖ·
  pBuffer  ¶Á³öоƬµÄÊý¾Ý 2¸ö¼Ä´æÆ÷µÄgpioµçƽ
*/
void PCA9555_readdata(unsigned char addr,unsigned char* pBuffer)
{
		IIC_Read_Pca9555(addr,PCA9555_REG_IN0,pBuffer,2);//2Ϊ¶Á³öоƬÊý¾Ý×éÊý£¬9555Ϊ2×é,È«²¿¶Á³ö   
}
///*ÅäÖÃоƬµÄ¶ÔÓ¦¹Ü½ÅÊäÈëÊä³ö¹¦ÄÜ
//  addr    оƬµØÖ·£¬0x40±íʾµÚÒ»¸öоƬµØÖ·
//  data_L  дÈëоƬµÄÇ°°ËλÊý¾Ý 1¸ß×迹ÊäÈë 0Êä³ö ÊäÈë¼Ä´æÆ÷ĬÈÏÉÏÀ­
//  data_H  дÈëоƬµÄÇ°ºóλÊý¾Ý
//*/
//void PCA9555_config_gpio(unsigned char addr,unsigned char data_L,unsigned char data_H)
//{                        
//		IIC_Write_Pca9555(addr,PCA9555_REG_CFG0,data_L,data_H);//	PCA9555_REG_OUT0 Êä³ö¼Ä´æÆ÷0µØÖ·    
//}


/*ÉèÖÃËùÓÐÊä³ö
  value  ¿ØÖƵÄIOÊä³ö״̬ 0£ºÈ«²¿Êä³öµÍ 1£ºÈ«²¿Êä³ö¸ß
	½öÏÞÊä³öģʽ
*/
void PCA9555_Set_All_Output(unsigned char value)
{
		int i;
		for(i=0;i<4;i++){
			if(value==0)
				pca9555writedata_output[i]=0;
			else
				pca9555writedata_output[i]=0xff;
		}
		PCA9555_write_output_port_data(PCA9555_DEVICE_ADDR,pca9555writedata_output[0],pca9555writedata_output[1]);//È«²¿Êä³öΪ1»ò0 
		//¶àоƬ
		//PCA9555_writedata(PCA9555_REG_OUT0,pca9555writedata[2],pca9555writedata[3]);
}
/*ÉèÖõÚÒ»¸öоƬijһͨµÀIO¸ßµÍÊä³ö½öÏÞÊä³ö
  num    ¿ØÖƵÄIOÐòºÅ 1~16
  value  ¿ØÖƵÄIOÊä³ö״̬ 0£ºµÍµçƽ 1£º¸ßµçƽ
*/
void PCA9555_Set_One_Value_Output(unsigned char num,unsigned char value)
{
	 if(num >0 && num <17){//µÚÒ»¸öоƬIO1-16¿ØÖÆ
		 if(num <9){
				if(value)pca9555writedata_output[0] |= 0x01<<(num - 1);//¸³ÖµÎ»¸ß
				else pca9555writedata_output[0] &= ~(0x01<<(num - 1));//¸³ÖµÎ»µÍ
			}
			else{
				if(value)pca9555writedata_output[1] |= 0x01<<(num - 9);//¸³ÖµÎ»¸ß
				else pca9555writedata_output[1] &= ~(0x01<<(num - 9));//¸³ÖµÎ»µÍ
			}
			PCA9555_write_output_port_data(PCA9555_DEVICE_ADDR,pca9555writedata_output[0],pca9555writedata_output[1]);
	 }else{//³¬³öоƬ¿ØÖÆ
	 		//error
	 }
	 //µ×ÏÂΪ¶àоƬÂß¼­
//	 else if(num >16 && num <33){//µÚ¶þ¸öоƬIO1-16¿ØÖÆ£¬Ê¹Óøü¶àIOÒÔ´ËÀàÍÆ£¬×î¶àÖ§³Ö0x000~0x111 ¹²8¸öоƬ´®Áª£¬¹²128¸öIO£¬Èç¹û²»¹»¿ÉÒÔʹÓÃPCA9505£¬40¸öIO£¬×î¶à´®Áª320¸öIO
//	 		if(num <25){
//				if(value)pca9555writedata[2] |= 0x01<<(num - 17);//¸³ÖµÎ»¸ß
//				else pca9555writedata[2] &= ~(0x01<<(num - 17));//¸³ÖµÎ»µÍ
//			}
//			else{
//				if(value)pca9555writedata[3] |= 0x01<<(num - 25);//¸³ÖµÎ»¸ß
//				else pca9555writedata[3] &= ~(0x01<<(num - 25));//¸³ÖµÎ»µÍ
//			}	
//			PCA9555_writedata(PCA9555_REG_OUT1,pca9555writedata[2],pca9555writedata[3]);
//	 }
//	 else{//³¬³öоƬ¿ØÖÆ
//	 		//error
//	 }
}
/*ÉèÖõÚÒ»¸öоƬijһͨµÀIOÊäÈë»òÊä³ö
  num    ¿ØÖƵÄIOÐòºÅ 1~17
  value  ¿ØÖƵÄIOÊä³ö״̬ 0£ºµÍµçƽ 1£º¸ßµçƽ
*/
void PCA9555_Set_One_Value_Config(unsigned char num,unsigned char value) 
{
	
	 if(num >0 && num <17){//µÚÒ»¸öоƬIO1-16¿ØÖÆ
		 if(num <9){
				if(value)pca9555writedata_config[0] |= 0x01<<(num - 1);//¸³ÖµÎ»¸ß
				else pca9555writedata_config[0] &= ~(0x01<<(num - 1));//¸³ÖµÎ»µÍ
			}
			else{
				if(value)pca9555writedata_config[1] |= 0x01<<(num - 9);//¸³ÖµÎ»¸ß
				else pca9555writedata_config[1] &= ~(0x01<<(num - 9));//¸³ÖµÎ»µÍ
			}
			PCA9555_write_config_port_data(PCA9555_DEVICE_ADDR,pca9555writedata_config[0],pca9555writedata_config[1]);
	 }else{//³¬³öоƬ¿ØÖÆ
	 		//error
	 }
}
void PCA9555_init()
{
IIC_gpio_pca_init();//ÅäÖÃIIC¹Ü½Å
PCA9555_write_config_port_data(PCA9555_DEVICE_ADDR,0x00,0x00);//È«ÅäÖÃΪÊä³ö
	//²âÊÔ
PCA9555_Set_All_Output(1);//È«²¿À­¸ß
}