![](templates/subSilver/images/CCSLogo.jpg) |
![CCS C Software and Maintenance Offers](templates/subSilver/images/forumAd6.jpg) |
View previous topic :: View next topic |
Author |
Message |
pfournier
Joined: 30 Sep 2003 Posts: 89
|
PCWH 4.095, 18F46J50, use rs232 not enabling serial port |
Posted: Wed Aug 12, 2009 1:53 pm |
|
|
I set up my code with the usual
#use rs232 ....
and tried to send some serial data out but it would not go. I discovered that the TXEN bit in TXSTA1 was not enabled. I am confused because in the old 3.249 compiler with 18f8622, it was always enabled.
Did something change.
Also I noticed that "#use STANDARD_IO()" does not seem to be the default. My I/O would not work until I declared this explicitily.
Comments? _________________ -Pete |
|
![](templates/subSilver/images/spacer.gif) |
PCM programmer
Joined: 06 Sep 2003 Posts: 21708
|
|
![](templates/subSilver/images/spacer.gif) |
Guest
|
|
Posted: Thu Aug 13, 2009 7:43 am |
|
|
Works:
Code: |
#include <18F46j50.h>
#fuses HSPLL,NOWDT,NOPROTECT,PLLDIV3
#use delay(clock=48000000)
#use rs232(baud=38400, xmit=PIN_C6, rcv=PIN_C7, ERRORS, parity=N, bits=8)
char txsta1;
#LOCATE txsta1 = 0xFAD
char txreg1;
#LOCATE txreg1 = 0xFAE
void main(void)
{
txsta1 = txsta1 | 0x20;
while (TRUE)
{
txreg1 = 'R'; //putc and printf do not work
}
}
|
Fails, Program Hangs on txreg1 = ‘R’; and nothing is sent out, also putc and printf do not work
If you stop the debugger it always stops at #use rs232...
Code: |
#include <18F46j50.h>
#fuses HSPLL,NOWDT,NOPROTECT,PLLDIV3
#use delay(clock=48000000)
#use rs232(baud=38400, xmit=PIN_C6, rcv=PIN_C7, ERRORS, parity=N, bits=8)
char txsta1;
#LOCATE txsta1 = 0xFAD
char txreg1;
#LOCATE txreg1 = 0xFAE
void main(void)
{
//txsta1 = txsta1 | 0x20;
while (TRUE)
{
txreg1 = 'R';
}
}
|
Note also that #use RS232 did not put value in for baud rate generator, I had to calculate the proper value. |
|
![](templates/subSilver/images/spacer.gif) |
PCM programmer
Joined: 06 Sep 2003 Posts: 21708
|
|
Posted: Thu Aug 13, 2009 2:40 pm |
|
|
I think that CCS just copied the register map from the 18F45J10 to
the 18F46J50 when they created that PIC in Devices4.dat file. The
problem is that the register maps are not the same. So the serial
port code for the 18F46J50 won't work. It's possible that the entire
register map is messed up. I didn't check other modules, such as
SPI, etc.
Here are the differences that I see in the .LST files (for vs. 4.095).
for the registers used in the UART initialization code:
Code: |
Register 18F45J10 18F46J50
address reg. name reg. name
0xFB8 BAUDCON ECCP2AS (wrong)
0xFAF SPBRG RCREG1 (wrong)
0xFB0 SPBRGH Not in .LST file
0xFAC TXSTA RCSTA1 (wrong)
0xFAB RCSTA SPBRG2 (wrong)
|
Those are the register addresses that appear in the .LST files for the
18F45J10 and the 18F46J50. They are correct for the 18F45J10, but
not for the 18F46J50, because the register map is different for that PIC.
If you tell CCS support about this bug, and if your compiler maintenance
has run out, I believe they will let you download the fixed version when
they release it. So I advise you to report it to them. Give them your
customer number so they know you own the compiler.
Also, vs. 4.096 has the same problems. |
|
![](templates/subSilver/images/spacer.gif) |
pfournier
Joined: 30 Sep 2003 Posts: 89
|
|
Posted: Thu Aug 13, 2009 3:03 pm |
|
|
Thanks, I never even considered looking in that area!
I have sent a note to CCS. _________________ -Pete |
|
![](templates/subSilver/images/spacer.gif) |
Leachj Guest
|
PIC18F46J50 serial port not working |
Posted: Wed Nov 11, 2009 3:51 am |
|
|
I am running version 4.099 of the CCS compiler and also have had problems getting the PIC18F46J50 to output serial data. I have found that the RCSTA registers are incorrectly defined in the device table. To correct this go to the device table editor which should be found in C:\Program Files\PICC\chipedit.exe. Find the 18F46J50 part on the left hand table and select it, then open the UART line in the centre table. The table for RCSTA originally showed FAB,F6B and this should be changed for FAC,F9C. Save the changes. Recompiling then produced working code!
Hope this helps all those who are experiencing similar problems. |
|
![](templates/subSilver/images/spacer.gif) |
|
|
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|