Function i2c_receive_data

bsp/loongson/ls1cdev/libraries/ls1c_i2c.c:259–281

* �������� * @i2c_info_p i2cģ����Ϣ * @buf ���ݻ��� * @len ���������ݵij��� */

 * @len ���������ݵij���
 */
ls1c_i2c_ret_t i2c_receive_data(ls1c_i2c_info_t *i2c_info_p, unsigned char *buf, int len)
{
    void *i2c_base = i2c_get_base(i2c_info_p->I2Cx);
    int i = 0;

    for (i=0; i<len; i++)
    {
        // ��ʼ����
        if (i != (len - 1))
            i2c_cmd_read_ack(i2c_info_p);
        else 
            i2c_cmd_read_nack(i2c_info_p);

        // �ȴ���ֱ���������
        if (!i2c_poll_status(i2c_info_p, LS1C_I2C_STATUS_TIP))
            return LS1C_I2C_RET_TIMEOUT;

        // ��ȡ���ݣ�������
        *buf++ = reg_read_8(i2c_base + LS1C_I2C_DATA_OFFSET);
    }

    return LS1C_I2C_RET_OK;
}


/*