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kevin5k
Joined: 08 Jan 2007
Posts: 41
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| Enalbe & RS config not working on pins B6 & B7 |
 Posted: Wed Jan 17, 2007 4:06 pm |
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ERm, somehow when I try and use pins B6 & B7 as the RS and Enable pins, nothing happens...  Y is this so? |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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kevin5k
Joined: 08 Jan 2007
Posts: 41
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| Posted: Wed Jan 17, 2007 4:36 pm |
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Tks for the insight PCM Programmer....You're always as helpful all the time...I'll try other pins...
| PCM programmer wrote: | | http://www.ccsinfo.com/forum/viewtopic.php?t=29476&highlight=debugger+pins |
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kevin5k
Joined: 08 Jan 2007
Posts: 41
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| Posted: Wed Jan 17, 2007 5:06 pm |
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I've used the following codes in flex_lcd.c and my main program. Thing is I think there is some addressing problem here...For this section of my code
| Code: |
printf(lcd_putc, "System Normal\n..........");
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The word "System Normal" seems to have shifted left by 5 characters. and so only the words "m Normal" appears on my LCD. Please advise...
| davekelly wrote: | In FlexLCD.c I have the following defines:
| Code: |
// Display ON/OFF Control defines
#define CLEAR_DISPLAY 0b00000001 // addition
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Then you can use
| Code: |
/////////////////////////////////////////////////////////////////////////
/// Completely clear the contents of the display
/////////////////////////////////////////////////////////////////////////
void ClearDisplay (void)
{
lcd_send_byte (0, 0x80); // Set memory to first line
lcd_send_byte (0, CLEAR_DISPLAY);
lcd_send_byte (0, 0xc0); // 'Second' line
lcd_send_byte (0, CLEAR_DISPLAY);
}
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Wed Jan 17, 2007 5:22 pm |
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I'm not sure what the purpose of his code is. The Flex LCD driver
(and the CCS driver) already has a "clear screen" command in it.
It's the \f command. Also notice that it takes a while for this command
to be executed by the LCD. The driver (see below) has a 2 ms delay
in it, to allow time for the command to finish. In his code, he doesn't
have any delay. As a consequence, when you tried to send a string
of text, the "clear screen" command was still in progress and the
first part of your text was ignored. I didn't say anything at the time,
but I recommend that you ignore his post.
See the \f command below:
| Code: |
//-----------------------------
void lcd_putc(char c)
{
switch(c)
{
case '\f': // Clear the LCD screen
lcd_send_byte(0,1);
delay_ms(2);
break;
case '\n':
lcd_gotoxy(1,2);
break;
case '\b':
lcd_send_byte(0,0x10);
break;
default:
lcd_send_byte(1,c);
break;
}
} |
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kevin5k
Joined: 08 Jan 2007
Posts: 41
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| Posted: Wed Jan 17, 2007 5:30 pm |
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Ok.....So does that mean I can call a function cleardisplay() and include the following:
| Code: |
cleardisplay();
{
lcd_send_byte(0,1);
delay_ms(2);
} |
Btw, if I need to burn the program into the PIC, do i need to use any special commands like #write eeprom or do I just use the normal method (Programmer --> Enable Programmer --> Erase device --> Program device)???
| PCM programmer wrote: | I'm not sure what the purpose of his code is. The Flex LCD driver
(and the CCS driver) already has a "clear screen" command in it.
It's the \f command. Also notice that it takes a while for this command
to be executed by the LCD. The driver (see below) has a 2 ms delay
in it, to allow time for the command to finish. In his code, he doesn't
have any delay. As a consequence, when you tried to send a string
of text, the "clear screen" command was still in progress and the
first part of your text was ignored. I didn't say anything at the time,
but I recommend that you ignore his post.
See the \f command below:
| Code: |
//-----------------------------
void lcd_putc(char c)
{
switch(c)
{
case '\f': // Clear the LCD screen
lcd_send_byte(0,1);
delay_ms(2);
break;
case '\n':
lcd_gotoxy(1,2);
break;
case '\b':
lcd_send_byte(0,0x10);
break;
default:
lcd_send_byte(1,c);
break;
}
} |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Wed Jan 17, 2007 5:41 pm |
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Just do this:
| Code: |
lcd_putc('\f'); // Clear the screen
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or
| Code: |
// Clear the screen and display "Hello World".
lcd_putc("\fHello World");
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----------------
Regarding the programmer question, it all depends upon what
programmer you have. Each programmer will come with its
own instructions on how to operate it. I don't know which one
you have. I have ICD2 and PicStart-Plus. |
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kevin5k
Joined: 08 Jan 2007
Posts: 41
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| Posted: Wed Jan 17, 2007 6:29 pm |
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Yes...I'm using ICD2 and PICDem2 Plus Dev Board...Thing is I want to just flash my program into the PIC and let it run by itself on the breadboard with all the connections.
I'm currently using PIC16F876A. is this possible? |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Wed Jan 17, 2007 6:57 pm |
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I'm not sure what you mean by "all the connections".
This thread has detailed instructions on programming a board so
it will run a program in standalone mode. This means you can
remove the ICD2 from the board after you program it.
http://www.ccsinfo.com/forum/viewtopic.php?t=21415 |
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davekelly
Joined: 04 Oct 2006
Posts: 53
Location: Berkshire, England
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| Posted: Thu Jan 18, 2007 2:30 am |
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| PCM programmer wrote: | I'm not sure what the purpose of his code is. The Flex LCD driver
(and the CCS driver) already has a "clear screen" command in it.
It's the \f command. Also notice that it takes a while for this command
to be executed by the LCD. The driver (see below) has a 2 ms delay
in it, to allow time for the command to finish. In his code, he doesn't
have any delay. As a consequence, when you tried to send a string
of text, the "clear screen" command was still in progress and the
first part of your text was ignored. I didn't say anything at the time,
but I recommend that you ignore his post.
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Sorry. My code was customized to work with the 16x1 display, which has a few peculiarities. |
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kevin5k
Joined: 08 Jan 2007
Posts: 41
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| Posted: Mon Jan 22, 2007 4:08 am |
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Cheers:)
| PCM programmer wrote: | I'm not sure what you mean by "all the connections".
This thread has detailed instructions on programming a board so
it will run a program in standalone mode. This means you can
remove the ICD2 from the board after you program it.
http://www.ccsinfo.com/forum/viewtopic.php?t=21415 |
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kevin5k
Joined: 08 Jan 2007
Posts: 41
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| Posted: Tue Feb 13, 2007 11:19 am |
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Hmm...Pin_A3 is giving me some problems with my circuit and its setup is as such...
Pin_A3 = Input from Zener Diode from a Slave board. Slave board is connected to Master board (holding the PIC) using a DB9 Socket Connector. Now the thing is, if I did not connect the DB9 connector from the Master board to the Slave board, a small voltage of about 1.5V can be measured at Pin_A3 which indicates a logic 'high' to the PIC which isn't what i want.
But when the DB9 connector is connected, everything functions normally.
I did read from the Datasheet that RA0,RA3 & RA5 have some special function....Do U think it is the reason that is causing the problem?
Guys, what would U suggest?Is it software or is it just my circuit?  |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Tue Feb 13, 2007 12:37 pm |
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You need to give us complete details on the external circuit. Tell us the
device that the PIC is connected to, and all components (resistors,
capacitors, zeners, etc). Explain the connections verbally or perhaps
with ASCII art (be sure to preview it before posting, to make sure it
displays correctly). Give all component values (including the Zener
voltage). |
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