Отправлено гоша 13 июня 2004 г. 17:12 В ответ на: Ответ: Дело в том, что прога не моя и вмешаться в нее я не могу! А AMD485 включнная все время на передачу жрет много. отправлено aljarkov 13 июня 2004 г. 15:55

SERIAL DATA TRANSMISSION FOR M5-SENSORS
Operating Instructions
The RTS-mode  is faster in transmitting data. Using this mode only is queried the ready-to-send signal of the computer. It is standing on high as long as the computer is  ready ot receive data.
That means, that after a reading request to the COM-Port, data are transmitted until the COM-Port is de-activated again.
At slow evaluations and high baudrate it is possible that the COM-buffer gets full. 
This can happen either at a quick reading, or according to the programme example as shown below A3.4 when closing the COM-ports.

	if(obuf->mode & OUTPUT_HFLOW_OFF) {
		obuf->mode &= ~OUTPUT_HFLOW_OFF;
		/*
		 * turn off RTS
	     */
		dev->modem_control &= ~0x02;
		outp(dev->iobase+4, dev->modem_control);
		}
	if(obuf->mode & OUTPUT_HFLOW_ON) {
		obuf->mode &= ~OUTPUT_HFLOW_ON;
		/*
		 * turn on RTS
	 	 */
		dev->modem_control |= 0x02;
		outp(dev->iobase+4, dev->modem_control);
		}