reset rs232

[vector]

basicly how do I "completly" reset the com port

Having a slight problem with a 16F876. im transmitting coms to it at 56700 in a noisy/glitchy environment, without noise it works fine but when noise is applied my dta corrupt trap alerts me to say its rcvd garbage. I simply ignore this packet and wait for the next. however it never recovers(ie the loop runs ok it just always gets garbage now), all packets become garbage and fall into my trap. Even if I remove the noise it wont recover. A hardware rest is the only way.
I have used rs232 sniffing techniques to ensure the debug is correct. it points directly to the PIC uart rcv as the only problem, I suspect its out of sync or something. I have #use RS2332 errors on. I have even tried to clear CREN.
I even tried putting a #use rs232 line in again..
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This message was ported from CCS's old forum
Original Post ID: 144516333

[PCM programmer]

:=
:=how do I "completely" reset the com port
-------------------------------------------------

In one of my old programs, I have this function:

#byte RCSTA=0x18 // Receive Status and Control

#define SPEN_BIT 7 // Bit position of SPEN within RCSTA

void reset_uart(void)
{
bit_clear(RCSTA, SPEN_BIT); // Reset the serial port
delay_ms(1);
bit_set(RCSTA, SPEN_BIT);
delay_ms(1);
}

This was for a 16F876.

I suggest that you try that, and also use the ERRORS directive
in your #use rs232 statement.
___________________________
This message was ported from CCS's old forum
Original Post ID: 144516341

[vector]

Tried this to no avail. have moved onto other projects. will revist as time permits.


:=:=
:=:=how do I "completely" reset the com port
:=-------------------------------------------------
:=
:=In one of my old programs, I have this function:
:=
:=#byte RCSTA=0x18 // Receive Status and Control
:=
:=#define SPEN_BIT 7 // Bit position of SPEN within RCSTA
:=
:=void reset_uart(void)
:={
:= bit_clear(RCSTA, SPEN_BIT); // Reset the serial port
:= delay_ms(1);
:= bit_set(RCSTA, SPEN_BIT);
:= delay_ms(1);
:=}
:=
:=This was for a 16F876.
:=
:=I suggest that you try that, and also use the ERRORS directive
:=in your #use rs232 statement.
___________________________
This message was ported from CCS's old forum
Original Post ID: 144516414