Exemplos de i2c_sendslaveaddr em C++ (Cpp)

Exemplo n.º 1

Arquivo: sunxi_i2c.c Projeto: dmitry-shavyrin/a64_lichee

/*
****************************************************************************************************
*
*             TWIC_Write
*
*  Description:
*       DRV_MOpen
*
*  Parameters:
*
*  Return value:
*       EPDK_OK
*       EPDK_FAIL
****************************************************************************************************
*/
int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
{
    int   i, ret, ret0, addrlen;
    char  *slave_reg;

    ret0 = -1;
    ret = i2c_sendstart();
    if(ret)
	{
		goto i2c_write_err_occur;
	}

    ret = i2c_sendslaveaddr(chip, I2C_WRITE);
    if(ret)
    {
	    goto i2c_write_err_occur;
	}
    //send byte address
    if(alen >= 3)
    {
        addrlen = 2;
    }
    else if(alen <= 1)
    {
        addrlen = 0;
    }
    else
    {
	addrlen = 1;
    }
    slave_reg = (char *)&addr;
    for (i = addrlen; i>=0; i--)
    {
    	ret = i2c_sendbyteaddr(slave_reg[i] & 0xff);
    	if(ret)
    	{
    		goto i2c_write_err_occur;
    	}
    }

	ret = i2c_senddata(buffer, len);
	if(ret)
	{
		goto i2c_write_err_occur;
	}
    ret0 = 0;

i2c_write_err_occur:
	i2c_stop();

	return ret0;
}

Exemplo n.º 2

Arquivo: sunxi_i2c.c Projeto: xwliu/BPI-M3-bsp

/*
****************************************************************************************************
*
*             TWIC_Write
*
*  Description:
*       DRV_MOpen
*
*  Parameters:
*
*  Return value:
*       EPDK_OK
*       EPDK_FAIL
****************************************************************************************************
*/
int i2c_write(uint bus_id, uchar chip, uint addr, int alen, uchar *buffer, int len)
{
    int   i, ret, ret0, addrlen;
    char  *slave_reg;
    uint twi_host = 0;

    ret0 = -1;
	if(bus_id < SUNXI_TWI_COUNT)
	{
		twi_host = SUNXI_TWI0_BASE + SUNXI_TWI_OFFSET * bus_id;
	}
	else
	{
		printf("i2c bus id %d is error\n", bus_id);
		return ret0;
	}
    ret = i2c_sendstart(twi_host);
    if(ret)
	{
		goto i2c_write_err_occur;
	}

    ret = i2c_sendslaveaddr(twi_host, chip, I2C_WRITE);
    if(ret)
    {
	    goto i2c_write_err_occur;
	}
    //send byte address
    if(alen >= 3)
    {
        addrlen = 2;
    }
    else if(alen <= 1)
    {
        addrlen = 0;
    }
    else
    {
		addrlen = 1;
    }

	slave_reg = (char *)&addr;
    for (i = addrlen; i>=0; i--)
    {
		ret = i2c_sendbyteaddr(twi_host, slave_reg[i] & 0xff);
    	if(ret)
    	{
    		goto i2c_write_err_occur;
    	}
    }

	ret = i2c_senddata(twi_host, buffer, len);
	if(ret)
	{
		goto i2c_write_err_occur;
	}
    ret0 = 0;

i2c_write_err_occur:
	i2c_stop(twi_host);

	return ret0;
}