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gjs_rsdi
Joined: 06 Feb 2006
Posts: 468
Location: Bali
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| rs232 on PIC12F1840 not working SOLVED |
 Posted: Mon Feb 24, 2020 4:38 am |
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Hi
I am trying two days already to figure out why my program for rs232 is not working on PIC12F1840.
CCS PCM C Compiler, Version 5.062
The same settings are working on PIC18F26K22.
| Code: | /////////////////////////////////////////////////////////////////////
//1840rs232.c rs232 test
/////////////////////////////////////////////////////////////////////
#include <12F1840.h>
#device ADC=10
#FUSES NOWDT,PUT,BROWNOUT,BORV25,NOLVP,MCLR
#FUSES INTRC_IO,PLL
#FUSES NOPROTECT,NOCPD
#use delay(internal=8MHz)
//#use rs232(baud=9600,parity=N,xmit=PIN_A0,rcv=PIN_A1,bits=8,stream=PORT1,errors)
#use rs232(baud=9600, UART1, stream=PORT1, errors)
//rs232 RA0=TX;RA1=RX;alternate RA4=TX;RA5=RX
#define LED PIN_A2//flashes ones a second
int LEDcounter;
int tx1switch=0,TXcounter;
#int_TIMER1
void TIMER1_isr(void)
{
LEDcounter++;
TXcounter++;
if(LEDcounter>=10)//500ms
{
LEDcounter=0;
output_toggle(LED);
}
if(TXcounter>=40)//2000ms
{
TXcounter=0;
enable_interrupts(INT_TBE);
}
set_timer1(15536);
}
#int_RDA
void RDA_isr(void)
{
delay_cycles(1);
}
#int_TBE
void TBE_isr(void)
{
switch(tx1switch)
{
case 0:
{
fputc(0x55,PORT1);
tx1switch=1;
}
break;
case 1:
{
fputc(0xAA,PORT1);
tx1switch=2;
}
break;
case 2:
{
fputc(0xFF,PORT1);
tx1switch=0;
disable_interrupts(INT_TBE);
}
break;
}
}
void main()
{
SETUP_ADC(NO_ANALOGS);
PORT_A_PULLUPS(0x08);
setup_timer_1(T1_INTERNAL|T1_DIV_BY_2);//65.536 ms overflow;
enable_interrupts(INT_TIMER1);
disable_interrupts(INT_RDA);
disable_interrupts(INT_TBE);
enable_interrupts(GLOBAL);
while(TRUE)
{
delay_cycles(1);
}
} |
For sure I am doing something wrong, but can't find what.
In the MPLAB simulator the program works correct. I mean the TX is triggered every 2000ms and loading the 3 bytes correct.
I put the counters, LED toggle and the TX start in the Interrupt of TIMER1 for simplicity.
The LED is blinking but no rs232.
The data is sent to the YAT terminal.
The data from PIC18F16K22 is displayed correct.
Please help
Best wishes
Joe
Last edited by gjs_rsdi on Thu Feb 27, 2020 8:06 pm; edited 1 time in total |
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temtronic
Joined: 01 Jul 2010
Posts: 9244
Location: Greensville,Ontario
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| Posted: Mon Feb 24, 2020 5:49 am |
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OK, that PIC uses the APFCON register to control where which pins the UART is connected to (as well as other peripherals). It's in chapter 12 of the datasheet. I'd configure that so you KNOW what it is ! If you're using a 'wizard', THAT could be changing it and never tell you.
And...
I'd cut a very simple 'Echo+' program
something like this....
| Code: |
main() {
while(true) {
receive a character form the terminal program(getc() )
send it+1, back to the terminal program (putc)
toggle Test LED
}
}
|
Pressing an 'A' on the PC keyboard should display a 'B' on the PC screen and every other press will lightup the LED.
This code is in the FAQ section of the manual, well, pretty sure it is.
By keeping it simple, you can confirm wiring, connections, timing, etc. that the hardware is 100%. |
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HaveAchat
Joined: 02 Aug 2015
Posts: 16
Location: Australia
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| Posted: Mon Feb 24, 2020 6:06 am |
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I cant see where you get the data from the RS232 port
I would also recommend an echo to test the connection
| Code: | #int_RDA
void RDA_isr(void)
{
char c = getc(port1);
putc(c,port1);
} |
Everything you type on the RS232 port should come straight back |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19545
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| Posted: Mon Feb 24, 2020 7:02 am |
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You are not running at the right clock rate:
#FUSES NOWDT,PUT,BROWNOUT,BORV25,NOLVP,MCLR
#FUSES INTRC_IO,PLL
You have the PLL enabled. With the PLL, the 8MHz setting will give
32Mhz.....
The simulators don't check the actual clock rate being used, but on the real
chip it matters.
Get rid of the PLL fuse. |
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gjs_rsdi
Joined: 06 Feb 2006
Posts: 468
Location: Bali
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| Posted: Mon Feb 24, 2020 4:02 pm |
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Thank you for posting, Temtronic, Ttelmah and HaveAchat.
I will try to explain myself better and what I have done so far:
PLL was there because I was running the PIC at 32MHz, changed to 8MHz,
I was thinking it may be the problem. Forget to cancel PLL. After out-commenting PLL, I am still getting
PLL_SW in the .LST file fuses. The LED blinks correct, toggle every 500ms with the
hardware, before and after out-commenting PLL.
Regarding the Wizard, I get:
| Code: | | #use rs232(baud=9600,parity=N,xmit=PIN_A0,rcv=PIN_A1,bits=8,stream=PORT1,errors) |
After it didn't work, I changed it to:
| Code: | | #use rs232(baud=9600, UART1, stream=PORT1, errors) |
The above works smooth with PIC18F26K22 as I mention before. Same PC, same terminal, same cable.
Echoing a sent byte, I done it in the beggining. I changed to send only (TX) as this how
the PIC18F26K22 works, to be sure I don't have problem there.
Tested again as below, using the same TX and RX format as in PIC18F26K22
| Code: | #int_RDA
void RDA_isr(void)
{
rx1w0=fgetc(PORT1);//should be 0x55
rx1w0=rx1w0+1;
enable_interrupts(INT_TBE);
}
#int_TBE
void TBE_isr(void)
{
fputc(rx1w0,PORT1);
disable_interrupts(INT_TBE);
} |
Tried again with the bellow settings, still not working, except the LED
| Code: | | #use rs232(baud=9600,parity=N,xmit=PIN_A0,rcv=PIN_A1,bits=8,stream=PORT1,errors) |
The program below compiles:
| Code: | #include <12F1840.h>
#device ADC=10
#FUSES NOWDT,PUT,BROWNOUT,BORV25,NOLVP,MCLR
#FUSES INTRC_IO//,PLL
#FUSES NOPROTECT,NOCPD
#use delay(internal=8MHz)
#use rs232(baud=9600,parity=N,xmit=PIN_A0,rcv=PIN_A1,bits=8,stream=PORT1,errors)
//#use rs232(baud=9600, UART1, stream=PORT1, errors)
#define LED PIN_A2
int LEDcounter;
int data=0;
#int_TIMER1
void TIMER1_isr(void)
{
LEDcounter++;
if(LEDcounter>=10)//500ms
{
LEDcounter=0;
output_toggle(LED);
}
set_timer1(15536);
}
#int_RDA
void RDA_isr(void)
{
data=fgetc(PORT1);
data=data+1;
enable_interrupts(INT_TBE);
}
#int_TBE
void TBE_isr(void)
{
fputc(data,PORT1);
disable_interrupts(INT_TBE);
}
void main()
{
SETUP_ADC(NO_ANALOGS);
PORT_A_PULLUPS(0x08);
setup_timer_1(T1_INTERNAL|T1_DIV_BY_2);//65.536 ms overflow;
enable_interrupts(INT_TIMER1);
enable_interrupts(INT_RDA);
disable_interrupts(INT_TBE);
enable_interrupts(GLOBAL);
while(TRUE)
{
delay_cycles(1);
}
} |
Tested again with the PIC18F26K22 to be sure about the USB/TTL converter and the terminal and it works fine.
Best wishes
Joe |
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HaveAchat
Joined: 02 Aug 2015
Posts: 16
Location: Australia
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| Posted: Mon Feb 24, 2020 6:26 pm |
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Joe,
I have dim memories of the Transmit Buffer Empty interrupt from long ago.
I thought it fired after the TX buffer had emptied.
It looks like your code is just waiting to run but I could be wrong.
Could you make the change below and see if it helps, its also helping me understand how to do this
| Code: | #int_RDA
void RDA_isr(void)
{
data=fgetc(PORT1);
fputc(data,PORT1); // added by John G - immediate echo
data=data+1;
enable_interrupts(INT_TBE);
}
#int_TBE
void TBE_isr(void)
{
fputc(data,PORT1);
disable_interrupts(INT_TBE);
} |
Regards,
John G |
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gjs_rsdi
Joined: 06 Feb 2006
Posts: 468
Location: Bali
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| Posted: Mon Feb 24, 2020 7:39 pm |
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Hi John
I tested it with the fputc(data,PORT1); inside the RX interrupt, not working.
I think is also wrong to add this instruction inside the interrupt routine.
Best wishes
Joe |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Mon Feb 24, 2020 9:26 pm |
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Look at your .LST file. Look at the code after the #use rs232() statement.
If you have code for a hardware UART, it will look like this:
(Your .LST file format should be set to Symbolic mode for best results).
| Code: | ..... #use rs232(baud=9600,parity=N,xmit=PIN_A0,rcv=PIN_A1,bits=8,stream=PORT1,errors)
*
0047: BTFSS PIR1.RCIF
0048: GOTO 047
0049: MOVLB 03
004A: MOVF RCSTA,W
004B: MOVLB 00
004C: MOVWF rs232_errors
004D: MOVLB 03
004E: MOVF RCREG,W // Reads from a hardware register
004F: MOVWF @78
0050: MOVLB 00
0051: BTFSS rs232_errors.1
0052: GOTO 057
0053: MOVLB 03
0054: BCF RCSTA.CREN
0055: BSF RCSTA.CREN
0056: MOVLB 00
*
0062: BTFSS PIR1.TXIF
0063: GOTO 062
0064: MOVLB 03
0065: MOVWF TXREG
.................... |
If you have code for a software UART, the first part of it will look like this,
with the MOVLW 08 statement:
| Code: | .... #use rs232(baud=9600,parity=N,xmit=PIN_A0,rcv=PIN_A1,bits=8, stream=PORT1,errors)
*
0047: MOVLB 01
0048: BSF TRISA.1
0049: MOVLB 00
004A: BTFSC PORTA.1
004B: GOTO 04A
004C: MOVLW 08 // Load the bit counter with 8 bits
004D: MOVWF @77
004E: CLRF @@26
004F: BSF @77.7
0050: GOTO 05F
0051: BCF @77.7
0052: GOTO 05F |
The #int_rda interrupt is only supported by a hardware UART.
Which code do you have ? |
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gjs_rsdi
Joined: 06 Feb 2006
Posts: 468
Location: Bali
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| Posted: Tue Feb 25, 2020 12:59 am |
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Thank you for posting PCM Programmer
What I have is the first one, I mean the hardware. It is the same as you posted with:
| Code: | | #use rs232(baud=9600,parity=N,xmit=PIN_A0,rcv=PIN_A1,bits=8,stream=PORT1,errors) |
and
| Code: | | #use rs232(baud=9600, UART1, stream=PORT1, errors) |
I am using always Symbolic mode after you told me in the past how to do that
Best wishes
Joe |
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gjs_rsdi
Joined: 06 Feb 2006
Posts: 468
Location: Bali
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| Posted: Tue Feb 25, 2020 1:59 am |
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Hi
To be able to compare apples to apples I made a new program to work with PIC18F26K22 and same hardware with a program that the rs232 works.
Both
| Code: | | #use delay(clock=64MHz,crystal=16MHz) |
The working program have thousands of lines and 7 headers.
From the .LST
PIC18F26K22 project CCP222X1*******WORKING
| Code: | .................... #use rs232(baud=9600, UART1, stream=PORT1, errors)
*
001BC: BTFSS PIR1.TX1IF
001BE: BRA 01BC
001C0: MOVWF TXREG1
001C2: RETURN 0
*
002A0: BTFSS PIR1.RC1IF
002A2: BRA 02A0
002A4: MOVFF RCSTA1,rs232_errors
002A8: MOVFF RCREG1,01
002AC: BTFSS rs232_errors.1
002AE: BRA 02B4
002B0: BCF RCSTA1.CREN
002B2: BSF RCSTA1.CREN
002B4: RETURN 0 |
The new project
PIC18F26K22 project 26K22rs232******NOT WORKING
| Code: | .................... #use rs232(baud=9600, UART1, stream=PORT1, errors)
*
000EE: BTFSS PIR1.TX1IF
000F0: BRA 00EE
000F2: MOVWF TXREG1
000F4: GOTO 00FC (RETURN)
*
00104: BTFSS PIR1.RC1IF
00106: BRA 0104
00108: MOVFF RCSTA1,rs232_errors
0010C: MOVFF RCREG1,01
00110: BTFSS rs232_errors.1
00112: BRA 0118
00114: BCF RCSTA1.CREN
00116: BSF RCSTA1.CREN
00118: GOTO 011E (RETURN) |
The working project have RETURN 0 at the end of the setting, the not working program have GOTO
Can this be the problem?
The not working rs232, LED blinks correct
| Code: | /////////////////////////////////////////////////////////////////////
//26k22rs232 test program
/////////////////////////////////////////////////////////////////////
#include <18F26K22.h>
#device ADC=10
#FUSES NOWDT,NOPBADEN,PUT,BROWNOUT,BORV29
#FUSES PLLEN,NOIESO,NOFCMEN,NOHFOFST,HSH//,INTRC_IO,HSH
#FUSES MCLR,STVREN,NOLVP,NOXINST,NODEBUG
#FUSES NOPROTECT,NOCPD,NOWRT,NOWRTC,NOWRTD
#use delay(clock=64MHz,crystal=16MHz)
#use rs232(baud=9600, UART1, stream=PORT1, errors)
#define flashled PIN_B5
int flashledcnt;
int TXcounter;
int data;
#int_TIMER0
void TIMER0_isr(void)
{
flashledcnt++;
TXcounter++;
if(flashledcnt>=10)
{
flashledcnt=0;
output_toggle(flashled);
}
if(TXcounter>=40)
{
TXcounter=0;
enable_interrupts(INT_TBE);
}
set_timer0(15536);
}
#int_TBE
void TBE_isr(void)
{
fputc(data,PORT1);
disable_interrupts(INT_TBE);
}
#int_RDA
void RDA_isr(void)
{
data=fgetc(PORT1);
data=data+1;
enable_interrupts(INT_TBE);
}
void main()
{
setup_adc_ports(NO_ANALOGS);
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_16);//65.536 ms overflow
enable_interrupts(INT_TIMER0);
enable_interrupts(INT_RDA);
disable_interrupts(INT_TBE);
enable_interrupts(GLOBAL);
while(TRUE)
{
delay_cycles(1);
}
} |
Best wishes
Joe |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19545
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| Posted: Tue Feb 25, 2020 2:37 am |
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No, the GOTO is quite correct.
The compiler uses this when the function is only being called from one place.
Fractionally quicker.
OK. Now it looks as if the clock should be right. The compiler normally
'overrides' incorrect clock fuse settings when you use 'internal=xx' , in the
clock setup, but I was trying to look for anything obvious that 'might' cause
a problem.
Can you count ten flashes, with a stopwatch, and verify that this does give
ten seconds?.
A clock error, would explain things not working.
Add the line to disable the comparator. setup_comparator(NC_NC);
Historically a lot of chips have issues with this having a higher priority
than other functions on the pins.
Will have to go back and have a play and see what 5.062 actually does,
but what you post now does look as if it should work.
You do realise the serial will be on C6/C7?.
Also, I'd initialise these three variables:
int flashledcnt=0;
int TXcounter=0;
int data='A';
Otherwise when you start the program, it could send straight away
depending on what just happens to be in the memory, and could send
a garbage character every 2 seconds. |
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gjs_rsdi
Joined: 06 Feb 2006
Posts: 468
Location: Bali
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| Posted: Tue Feb 25, 2020 6:16 pm |
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SOLVED
I started thinking what is the difference between the working and not working projects.
The difference is that in the working project I have many calls in the main and the not working just the 1 cycle delay.
I was always afraid from delays that an interrupt will not be served during the delay time.
The problem was this:
| Code: | while(TRUE)
{
delay_cycles(1);
} |
I started with delay of 1000ms down to 1us and all works OK
| Code: | while(TRUE)
{
delay_us(1);
} |
I want to thank everybody that contributed to this topic, I learned a lot
Regarding your last post Ttelmah, I implemented all but didn't help. I know that I am working with C6 and C7 as I designed the board.
I still have a question as my knowledge is very limited:
WHY? I mean why is not working with the one cycle delay?
Best wishes
Joe |
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temtronic
Joined: 01 Jul 2010
Posts: 9244
Location: Greensville,Ontario
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| Posted: Wed Feb 26, 2020 6:28 am |
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hmmm....
you do this in the ISR..
disable_interrupts(INT_TBE);
and never enable it again in main()
just curious as to why |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19545
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| Posted: Wed Feb 26, 2020 6:59 am |
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He enables it when he writes the character in INT_RDA.
It has to be disabled if there is nothing more to send otherwise it'll keep
triggering.
Must admit cannot see why it'd not service interrupts with the loop only
having a delay_cycles(1);
Would have to look at the assembler. Guess that the optimiser is changing
this and the effect is somehow to interfere with the interrupt handling. |
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gjs_rsdi
Joined: 06 Feb 2006
Posts: 468
Location: Bali
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| Posted: Wed Feb 26, 2020 6:32 pm |
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Thank you for posting Ttelmah and Temtronic.
I was happy too early 
The PIC18F26K22 rs232 works. I made it similar as possible the the PIC12F1840 | Code: | /////////////////////////////////////////////////////////////////////
//26k22rs232 test program
/////////////////////////////////////////////////////////////////////
#include <18F26K22.h>
#device ADC=10
#FUSES NOWDT,NOPBADEN,PUT,BROWNOUT,BORV29
#FUSES PLLEN,NOIESO,NOFCMEN,NOHFOFST,INTRC_IO//HSH
#FUSES MCLR,STVREN,NOLVP,NOXINST,NODEBUG
#FUSES NOPROTECT,NOCPD,NOWRT,NOWRTC,NOWRTD
#use delay(internal=32MHz)
#use rs232(baud=9600, UART1, stream=PORT1, errors)
#define LED PIN_B5
int LEDcounter=0;
int TXcounter=0;
int data=0x0A;
#int_TIMER1
void TIMER1_isr(void)
{
LEDcounter++;
TXcounter++;
if(LEDcounter>=10)//500ms
{
LEDcounter=0;
output_toggle(LED);
}
if(TXcounter>=40)
{
TXcounter=0;
enable_interrupts(INT_TBE);
}
set_timer1(15536);
}
#int_TBE
void TBE_isr(void)
{
fputc(data,PORT1);
disable_interrupts(INT_TBE);
}
#int_RDA
void RDA_isr(void)
{
data=fgetc(PORT1);
data=data+1;
enable_interrupts(INT_TBE);
}
void main()
{
SETUP_ADC(NO_ANALOGS);
setup_comparator(NC_NC);
setup_timer_1(T1_INTERNAL|T1_DIV_BY_8);//65.536 ms overflow;
enable_interrupts(INT_TIMER1);
enable_interrupts(INT_RDA);
disable_interrupts(INT_TBE);
enable_interrupts(GLOBAL);
while(TRUE)
{
delay_us(10);
}
} |
The 12F1840 not working:
| Code: | /////////////////////////////////////////////////////////////////////
//1840rs232.c rs232 test
/////////////////////////////////////////////////////////////////////
#include <12F1840.h>
#device ADC=10
#FUSES NOWDT,PUT,BROWNOUT,BORV25,NOLVP,MCLR
#FUSES INTRC_IO,PLL
#FUSES NOPROTECT,NOCPD
#use delay(internal=32MHz)
//#use rs232(baud=9600,parity=N,xmit=PIN_A0,rcv=PIN_A1,bits=8,stream=PORT1,errors)
#use rs232(baud=9600, UART1, stream=PORT1, errors)
#define LED PIN_A2//flashes ones a second
int LEDcounter=0;
int TXcounter=0;
int data=0x0A;
#int_TIMER1
void TIMER1_isr(void)
{
LEDcounter++;
TXcounter++;
if(LEDcounter>=10)//500ms
{
LEDcounter=0;
output_toggle(LED);
}
if(TXcounter>=40)
{
TXcounter=0;
enable_interrupts(INT_TBE);
}
set_timer1(15536);
}
#int_TBE
void TBE_isr(void)
{
fputc(data,PORT1);
disable_interrupts(INT_TBE);
}
#int_RDA
void RDA_isr(void)
{
data=fgetc(PORT1);
data=data+1;
enable_interrupts(INT_TBE);
}
void main()
{
SETUP_ADC(NO_ANALOGS);
setup_comparator(NC_NC);
setup_timer_1(T1_INTERNAL|T1_DIV_BY_8);//65.536 ms overflow;
enable_interrupts(INT_TIMER1);
enable_interrupts(INT_RDA);
disable_interrupts(INT_TBE);
enable_interrupts(GLOBAL);
while(TRUE)
{
delay_us(10);
}
} |
PIC1F1847 from the PIC12F1840 family don't work also:
| Code: | /////////////////////////////////////////////////////////////////////
//1847rs232.c rs232 test
/////////////////////////////////////////////////////////////////////
#include <16F1847.h>
#device ADC=10
#FUSES NOWDT,PUT,BROWNOUT,BORV25,NOLVP,MCLR
#FUSES INTRC_IO,PLL
#FUSES NOPROTECT,NOCPD
#use delay(internal=32MHz)
//#use rs232(baud=9600,parity=N,xmit=PIN_B2,rcv=PIN_B1,bits=8,stream=PORT1,errors)
#use rs232(baud=9600, UART1, stream=PORT1, errors)
#define LED PIN_B5//flashes ones a second
int LEDcounter=0;
int TXcounter=0;
int data=0x0A;
#int_TIMER1
void TIMER1_isr(void)
{
LEDcounter++;
TXcounter++;
if(LEDcounter>=10)//500ms
{
LEDcounter=0;
output_toggle(LED);
}
if(TXcounter>=40)
{
TXcounter=0;
enable_interrupts(INT_TBE);
}
set_timer1(15536);
}
#int_TBE
void TBE_isr(void)
{
fputc(data,PORT1);
disable_interrupts(INT_TBE);
}
#int_RDA
void RDA_isr(void)
{
data=fgetc(PORT1);
data=data+1;
enable_interrupts(INT_TBE);
}
void main()
{
SETUP_ADC(NO_ANALOGS);
setup_comparator(NC_NC_NC_NC);
setup_timer_1(T1_INTERNAL|T1_DIV_BY_8);//65.536 ms overflow;
enable_interrupts(INT_TIMER1);
enable_interrupts(INT_RDA);
disable_interrupts(INT_TBE);
enable_interrupts(GLOBAL);
while(TRUE)
{
delay_us(10);
}
} |
The LED works correctly on all.
I made a compare in the CCS IDE and they are similar except controllers name and fuses for PIC18F26K22.
The .LST files of the PIC12F1840 and PIC16F1847 are similar, the PIC18F26K22 completely different or I don't understand enough to judge.
| Code: | //********************************************
#device PIC18F26K22
.................... #use rs232(baud=9600, UART1, stream=PORT1, errors)
*
000EE: BTFSS PIR1.TX1IF
000F0: BRA 00EE
000F2: MOVWF TXREG1
000F4: GOTO 00FC (RETURN)
*
00104: BTFSS PIR1.RC1IF
00106: BRA 0104
00108: MOVFF RCSTA1,rs232_errors
0010C: MOVFF RCREG1,01
00110: BTFSS rs232_errors.1
00112: BRA 0118
00114: BCF RCSTA1.CREN
00116: BSF RCSTA1.CREN
00118: GOTO 011E (RETURN)
//********************************************
#device PIC16F1847
.................... #use rs232(baud=9600, UART1, stream=PORT1, errors)
*
0051: BTFSS PIR1.TXIF
0052: GOTO 051
0053: MOVLB 03
0054: MOVWF TXREG
*
005B: BTFSS PIR1.RCIF
005C: GOTO 05B
005D: MOVLB 03
005E: MOVF RCSTA,W
005F: MOVLB 00
0060: MOVWF rs232_errors
0061: MOVLB 03
0062: MOVF RCREG,W
0063: MOVWF @78
0064: MOVLB 00
0065: BTFSS rs232_errors.1
0066: GOTO 06B
0067: MOVLB 03
0068: BCF RCSTA.CREN
0069: BSF RCSTA.CREN
006A: MOVLB 00
//*********************************************
#device PIC12F1840
.................... #use rs232(baud=9600, UART1, stream=PORT1, errors)
*
0051: BTFSS PIR1.TXIF
0052: GOTO 051
0053: MOVLB 03
0054: MOVWF TXREG
*
005B: BTFSS PIR1.RCIF
005C: GOTO 05B
005D: MOVLB 03
005E: MOVF RCSTA,W
005F: MOVLB 00
0060: MOVWF rs232_errors
0061: MOVLB 03
0062: MOVF RCREG,W
0063: MOVWF @78
0064: MOVLB 00
0065: BTFSS rs232_errors.1
0066: GOTO 06B
0067: MOVLB 03
0068: BCF RCSTA.CREN
0069: BSF RCSTA.CREN
006A: MOVLB 00
//*******************************************
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By the way Temtronic, I am enabling the TBE in the RX interrupt as Ttelmah wrote and when the counter getting to 2000ms. It is the same as in the PIC18F26K22 that works in both cases.
Have no idea what happening
Best wishes
Joe |
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