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bsodmike
Joined: 05 Aug 2006
Posts: 52
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| Referencing I/O Pins. |
 Posted: Thu Sep 28, 2006 3:51 am |
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Hi,
According to,
http://www.phanderson.com/PIC/PICC/CCS_PCM/tmr0.html
Even though that's very old it seems at CCS at a time supported referencing pins as
| Quote: | #define LED_FL_PIN rb3 // RB3
#define SPKR_PIN rb2
#define LED_FL_DIR trisb3
#define SPKR_DIR trisb2 |
and performing,
| Quote: | SPKR_DIR = 0; // make SPKR and LED_FL outputs
LED_FL_DIR = 0;
LED_FL_PIN = 0;
SPKR_PIN = 0; |
In my current code I'm using something along the lines of,
#define xPin PORTB.0
#define xTris TRISB.0
while defining
#define PORTA 0x05
etc etc
and that works. However, 'xPin=0;' doesn't work and I'm forced to use output_low(xPin);
Any ideas on this? |
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bsodmike
Joined: 05 Aug 2006
Posts: 52
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| Posted: Thu Sep 28, 2006 5:18 am |
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I've noticed another problem.
Even defining,
#define xPin PORTB.0
and
output_low(xPin); //doesn't work!
However, '#define xPin PIN_B0' causes it to work, as in the headerfile these are defined in the 'register*8+pin' format (so in this case 6*8+0, as 0x06 is the PORTB register.
Some googling and I found Phanderson's definitions for the 16f84,
| Code: | // DEFS_F84.H (CCS PCM)
//
// Definitions of file registers and bits.
//
// PIC16F84. These agree with Microchip.
//
// Note that bits are lower case for C, upper case for assembly.
//
// copyright Peter H. Anderson, Scotland Co, NC, Mar, '99
// register definitions
#define W 0
#define F 1
// register files
#byte INDF =0x00
#byte TMR0 =0x01
#byte PCL =0x02
#byte STATUS =0x03
#byte FSR =0x04
#byte PORTA =0x05
#byte PORTB =0x06
#byte EEDATA =0x08
#byte EEADR =0x09
#byte PCLATH =0x0a
#byte INTCON =0x0b
#byte OPTION_REG =0x81
#byte TRISA =0x85
#byte TRISB =0x86
#byte EECON1 =0x88
#byte EECON2 =0x89
#bit ra4 =0x05.4
#bit ra3 =0x05.3
#bit ra2 =0x05.2
#bit ra1 =0x05.1
#bit ra0 =0x05.0
#bit rb7 =0x06.7
#bit rb6 =0x06.6
#bit rb5 =0x06.5
#bit rb4 =0x06.4
#bit rb3 =0x06.3
#bit rb2 =0x06.2
#bit rb1 =0x06.1
#bit rb0 =0x06.0
#bit trisa4 =0x85.4
#bit trisa3 =0x85.3
#bit trisa2 =0x85.2
#bit trisa1 =0x85.1
#bit trisa0 =0x85.0
#bit trisb7 =0x86.7
#bit trisb6 =0x86.6
#bit trisb5 =0x86.5
#bit trisb4 =0x86.4
#bit trisb3 =0x86.3
#bit trisb2 =0x86.2
#bit trisb1 =0x86.1
#bit trisb0 =0x86.0 |
/me slaps head! #bit/#byte, maybe these'll help, will test in a bit.
Update: Works now, it was the #bit/#byte that sorted it out...
Thanks! |
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