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Ramsey
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| PCD: Converting 18F code to PIC24 |
 Posted: Sat Oct 03, 2009 1:31 pm |
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Hello,
I hope someone can help me to convert this code into PIC24 compatible.
I am using PIC24FJ256GB.
| Code: |
#include <18F452.h>
#fuses EC_IO,NOWDT,NOPROTECT,BROWNOUT,PUT,NOLVP
#use delay(clock=4000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, ERRORS)
//=============================
//Keypad connection:
#define row0 PIN_B4
#define row1 PIN_B5
#define row2 PIN_B6
#define row3 PIN_B7
#define col0 PIN_B0
#define col1 PIN_B1
#define col2 PIN_B2
#define col3 PIN_B3
// Keypad layout:
char const KEYS[4][4] =
{{'1','2','3','A'},
{'4','5','6','B'},
{'7','8','9','C'},
{'*','0','#','D'}};
#define KBD_DEBOUNCE_FACTOR 33 // Set this number to apx n/333 where
// n is the number of times you expect
// to call kbd_getc each second
void kbd_init()
{
//set_tris_b(0xF0);
//output_b(0xF0);
port_b_pullups(true);
}
short int ALL_ROWS (void)
{
if(input (row0) & input (row1) & input (row2) & input (row3))
return (0);
else
return (1);
}
char kbd_getc()
{
static byte kbd_call_count;
static short int kbd_down;
static char last_key;
static byte col;
byte kchar;
byte row;
kchar='\0';
if(++kbd_call_count>KBD_DEBOUNCE_FACTOR)
{
switch (col)
{
case 0:
output_low(col0);
output_high(col1);
output_high(col2);
output_high(col3);
break;
case 1:
output_high(col0);
output_low(col1);
output_high(col2);
output_high(col3);
break;
case 2:
output_high(col0);
output_high(col1);
output_low(col2);
output_high(col3);
break;
case 3:
output_high(col0);
output_high(col1);
output_high(col2);
output_low(col3);
break;
}
if(kbd_down)
{
if(!ALL_ROWS())
{
kbd_down=false;
kchar=last_key;
last_key='\0';
}
}
else
{
if(ALL_ROWS())
{
if(!input (row0))
row=0;
else if(!input (row1))
row=1;
else if(!input (row2))
row=2;
else if(!input (row3))
row=3;
last_key =KEYS[row][col];
kbd_down = true;
}
else
{
++col;
if(col==4)
col=0;
}
}
kbd_call_count=0;
}
return(kchar);
}
//===========================
void main()
{
char k;
kbd_init();
printf("\r\Starting ...");
while(TRUE)
{
k=kbd_getc();
if(k!=0)
{
if(k=='*')
printf("%c", '*');
else
printf("%c", k);
}
}
}
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bkamen
Joined: 07 Jan 2004
Posts: 1611
Location: Central Illinois, USA
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| Posted: Sat Oct 03, 2009 10:31 pm |
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Have you even tried yet?
You need to change the #device .H file, the clock speed and your general use of 8bit vs 16bit INTs.
Have you read the datasheet for the PIC24 you are using?
Have you read the conversion PDF in the PICC install directory covering differences between PCH and PCD?
-Ben
_________________
Dazed and confused? I don't think so. Just "plain lost" will do. :D |
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dyeatman
Joined: 06 Sep 2003
Posts: 1923
Location: Norman, OK
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| Posted: Sun Oct 04, 2009 12:46 am |
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He will also have to map the UART pins....
_________________
Google and Forum Search are some of your best tools!!!! |
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FvM
Joined: 27 Aug 2008
Posts: 2337
Location: Germany
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| Posted: Sun Oct 04, 2009 1:01 am |
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The only explicite difference is with port_b_pullups() that has to be replaced with set_pullup() for individual pins (or another construct operating on PIC24 SFR directly).
#pin_select statements for UART pins are needed to specify the usage of a hardware UART with PIC24FJ256GB. The xmit=PIN_xx, rcv=PIN_xx syntax creates a software UART. If you started with a "Hello world" application for your target hardware, you should have already used the UART.
There should be no problem to continue using 8-bit data. |
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bkamen
Joined: 07 Jan 2004
Posts: 1611
Location: Central Illinois, USA
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| Posted: Sun Oct 04, 2009 1:15 am |
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| dyeatman wrote: | | He will also have to map the UART pins.... |
not if he just calls out:
| Code: | | #use rs232 (UART1, baud=9600, yada yada) |
_________________
Dazed and confused? I don't think so. Just "plain lost" will do. :D |
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FvM
Joined: 27 Aug 2008
Posts: 2337
Location: Germany
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| Posted: Sun Oct 04, 2009 6:02 am |
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| Quote: | | #use rs232 (UART1, baud=9600, yada yada) |
Which specification you're referring to? |
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Ramsey
Guest
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| Posted: Sun Oct 04, 2009 10:49 am |
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BKamen:
I set the configuration bit as follows:
| Code: | #include <24FJ256GB110.h>
#device ADC=10
#device PASS_STRINGS=IN_RAM
#FUSES NOWDT //No Watch Dog Timer
#FUSES NOJTAG //JTAG disabled
#FUSES NOWRT //Program memory not write protected
#FUSES NODEBUG //No Debug mode for ICD
#FUSES ICSP1 //ICD uses PGC1/PGD1 pins
#FUSES NOWINDIS //Watch Dog Timer in Window mode
#FUSES WPRES128 //Watch Dog Timer PreScalar 1:128
#FUSES WPOSTS16 //Watch Dog Timer PostScalar 1:32768
#FUSES IESO //Internal External Switch mode enabled
#FUSES NOCKSFSM //Clock Switching is disabled
#FUSES NOOSCIO //OSC2 is clock output
#FUSES HS //High speed Osc
#FUSES XT
#FUSES NOIOL1WAY //multiple reconfigurations of pins
#FUSES WPEND_LOW
#FUSES NOWPCFG
#FUSES NOWPDIS
#FUSES WPFP0
//#FUSES PR_PLL //Enable PLL for primary oscillator?
#FUSES PLL3 //Divide By 3(12MHz oscillator input)
#FUSES RESERVED //Used to set the reserved FUSE bits
#FUSES DISUVREG
#use delay(clock=24000000)
-----------------------------------------------------------
FVM:
void kbd_init()
{
//set_tris_b(0xF0);
//output_b(0xF0);
set_pullup(true, pin_B4);
set_pullup(true, pin_B5);
set_pullup(true, pin_B6);
set_pullup(true, pin_B7);
set_pullup(true, pin_C1); // on c port
set_pullup(true, pin_C2);
set_pullup(true, pin_C3);
set_pullup(true, pin_C4);
} |
The result:
------------------------------------------------------------
*** Error 28 "main.c" Line 62(11,14): Expecting an identifier
- short int ALL_ROWS (void)
*** Error 43 "main.c" Line 62(20,21): Expecting a declaration
*** Error 81 "main.c" Line 63(1,2): Expecting a basic type
*** Error 43 "main.c" Line 64(1,3): Expecting a declaration
*** Error 43 "main.c" Line 64(3,4): Expecting a declaration
--------------------------------------------------------------
| Quote: | your general use of 8bit vs 16bit INTs.
or
#pin_select XXX = PIN_B2
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Could this be a problem ? |
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bkamen
Joined: 07 Jan 2004
Posts: 1611
Location: Central Illinois, USA
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| Posted: Sun Oct 04, 2009 1:40 pm |
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Your error sits in main. Could you post main() for us?
-Ben
_________________
Dazed and confused? I don't think so. Just "plain lost" will do. :D |
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FvM
Joined: 27 Aug 2008
Posts: 2337
Location: Germany
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| Posted: Sun Oct 04, 2009 1:49 pm |
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I can't do anything than you can: Identifying the error locations and determine the real or PCD imagined cause.
I found two problems:
- PCD is actually rejecting the type short int, although specified as legal in the manual. Just replace it with int8.
- PCD apparently doesn't use a complete table of CN pins that have a pulldown option for set_pullup().
So you have to operate on CNPUx SFRs instead. |
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Ramsey
Guest
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| Posted: Mon Oct 05, 2009 5:43 am |
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Hi guys,
i changed to int8 and this part is working. Thank you.
All that is now left is this error:
| Quote: | *** Error 27 "main.c" Line 61(24,25): Expression must evaluate to a constant :: Not a CN pin
*** Error 27 "main.c" Line 62(24,25): Expression must evaluate to a constant :: Not a CN pin
*** Error 27 "main.c" Line 63(24,25): Expression must evaluate to a constant :: Not a CN pin
*** Error 27 "main.c" Line 64(24,25): Expression must evaluate to a constant :: Not a CN pin
*** Error 27 "main.c" Line 65(24,25): Expression must evaluate to a constant :: Not a CN pin
*** Error 27 "main.c" Line 66(24,25): Expression must evaluate to a constant :: Not a CN pin
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line 27 is this : set_pullup(true, pin_B6);
CN settings:
CNPU1 - 006C
CNPU2 - 006E
CNPU3 - 0070
CNPU4 - 0072
CNPU5 - 0074
CNPU6 - 0076
#byte CNPU1 = 0x6C
-------------------------------------------------
What's the right way to define SFR settings ? |
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FvM
Joined: 27 Aug 2008
Posts: 2337
Location: Germany
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| Posted: Mon Oct 05, 2009 7:10 am |
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I didn't mention explicitely, but you should report the set_pullup() bug to CCS.
First, you have to find out the CN numbers of the respective pins. RB4=CN6, RB5=CN7, RB6=CN24, RB7=CN25, C1-4=CN45-48. The number defines the bit position in CNPU registers. You can either use bit, byte or word accesses to set them. I suggest bit accesses according set_pullup();
| Code: | #bit CNPU6E = 0x6c.6
#bit CNPU24E = 0x6e.8
#bit CNPU25E = 0x6e.9
#bit CNPU45E = 0x70.13
//...
CNPU6E = 1;
CNPU24E = 1;
CNPU25E = 1; |
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Ramsey
Guest
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| Posted: Mon Oct 05, 2009 2:07 pm |
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OK. I will report it to CCS.
btw. it's 4.093 version.
| Code: |
#bit CN6PUE = 0x6C.6 // RB4
#bit CN24PUE = 0x6E.8 // RB3
#bit CN25PUE = 0x6E.9 // RB2
#bit CN45PUE = 0x70.13 // RB1
#bit CN48PUE = 0x72.0 // RC4
#bit CN47PUE = 0x70.15 // RC3
#bit CN46PUE = 0x70.14 // RC2
#bit CN45PUE = 0x70.13 // RC1
main void()
{
------------------------------
CN6PUE = 1;
CN24PUE = 1;
CN25PUE = 1;
CN45PUE = 1;
CN48PUE = 1;
CN47PUE = 1;
CN46PUE = 1;
//CN45PUE = 1;
------------------------------
settings for the LCD
setup_spi(SPI_SS_DISABLED);
setup_spi2(SPI_SS_DISABLED);
setup_wdt(WDT_ON);
setup_timer1(TMR_DISABLED|TMR_DIV_BY_1);
}
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I removed the set_pullups part and the code is compiled without errors.
I'm gonna try it on the demo board to see if this is working.
If I miss something, let me know. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Mon Oct 05, 2009 2:16 pm |
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| Quote: |
setup_spi(SPI_SS_DISABLED);
setup_spi2(SPI_SS_DISABLED);
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The spi modules are not disabled in that way.
This is how it should be done:
| Code: |
setup_spi(FALSE);
setup_spi2(FALSE);
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FvM
Joined: 27 Aug 2008
Posts: 2337
Location: Germany
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| Posted: Mon Oct 05, 2009 3:07 pm |
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| Quote: | | The spi modules are not disabled in that way |
Yes, important to mention. But with this PIC, an SPI module without #pin_select in effect doesn't show at all. |
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Ramsey
Guest
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| Posted: Tue Oct 06, 2009 10:33 am |
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I compiled the code without errors but I can't get any result.
LCD is working but I can't get any keypress output.
Btw. I tested the keypad on 18F and picdem2 plus, and it worked just fine.
So it looks like we missed something in the code conversion part...
R. |
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