public slip_error_t slip_read_byte(byte val)
{
slip_error_t error = slip_error_t.SLIP_NO_ERROR;
switch (this.state)
{
case slip_state_t.SLIP_STATE_NORMAL:
switch (val)
{
case SLIP_SPECIAL_BYTE_END:
if (this.size > 0)
{
this.descriptor.recv_message(
this.descriptor.buf,
this.size
);
}
reset_rx();
break;
case SLIP_SPECIAL_BYTE_ESC:
this.state = slip_state_t.SLIP_STATE_ESCAPED;
break;
default:
error = put_byte_to_buffer(val);
break;
}
break;
case slip_state_t.SLIP_STATE_ESCAPED:
switch (val)
{
case SLIP_ESCAPED_BYTE_END:
val = SLIP_SPECIAL_BYTE_END;
break;
case SLIP_ESCAPED_BYTE_ESC:
val = SLIP_SPECIAL_BYTE_ESC;
break;
default:
error = slip_error_t.SLIP_ERROR_UNKNOWN_ESCAPED_BYTE;
reset_rx();
break;
}
if (error != slip_error_t.SLIP_NO_ERROR)
{
break;
}
error = put_byte_to_buffer(val);
break;
}
return(error);
}
slip_error_t put_byte_to_buffer(byte val)
{
slip_error_t error = slip_error_t.SLIP_NO_ERROR;
if (this.size >= this.descriptor.buf_size)
{
error = slip_error_t.SLIP_ERROR_BUFFER_OVERFLOW;
reset_rx();
}
else
{
this.descriptor.buf[this.size++] = val;
this.state = slip_state_t.SLIP_STATE_NORMAL;
}
return(error);
}
