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rb8720
Joined: 04 Jun 2007
Posts: 13
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| converting from 12f683 to 16f84 or similar. |
 Posted: Mon Apr 21, 2008 2:16 pm |
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I wrote some code a while back for a 12f683 with alot of help from others. I am astill a total newb. I got it working like i want but now I find myself in need of more inputs and outputs and was considering converting to a 16f84 or similar. How hard would it be to convert my existing code to work on 16f84? If needed I can post the code i have here.
Thanks,
RB8720 |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Mon Apr 21, 2008 2:26 pm |
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| Quote: | | How hard would it be to convert my existing code to work on 16f84 ? |
That's an older PIC. It doesn't have an internal oscillator, or an A/D
or a comparator or anything, really. A better chip would be the 16F88.
Or possibly the 16F628 or 16F628A (no A/D in those two PICs).
| Quote: | | How hard would it be to convert my existing code ? |
If you use the CCS functions entirely, then it should be fairly easy to
port the code from one PIC to another. Change the #include statement
to use the .H file for the new PIC. If you're using peripheral modules,
make sure you specify the correct pins, if required, by #use statements. |
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rb8720
Joined: 04 Jun 2007
Posts: 13
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| Posted: Mon Apr 21, 2008 4:57 pm |
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thanks, i think i'll go with the 16f88. here is my code. could you tell me what i would need to change?
| Code: |
//PREPROCESSOR section/////////////////////////////////////////////////////////////////////////////////////////////
#include "12F683.H" //PIC chip file (don't also specify in cmd prompt)
#include "delay_ms.h" //Delay function used below
//#include files must be in same folder as cc5x.exe if no path
#define pin7 1<<0 //Pin 7, bit 0
#define pin6 1<<1 //Pin 6, bit 1
#pragma config = 0b.0.1100.0100 //Brown-out Detect disabled (0)
//Code Protect off (1)
//MCLR set to 'Internal' (1) (LEDs don't flash with other setting)
//Powerup timer enabled (0)
//Watchdog timer disabled (0)
//Oscillator set to INTRCIO (100)
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void init_ports(void) {
TRISIO = 0b11111111; // SET AS INPUT
CMCON0 = 0x07; // Set GP<2:0> to digital I/O
ANSEL = 0;
WPU = 0b00000011;
}
//////////////////////////////////////////////////////////////////////
int get_key (int button) {
// Is GP5 low - no so exit
if (GPIO & button) return 0; // no key yet
delay_ms(1); // wait for key to settle
// Is GP5 high ? yes so exit = false key.
if ((GPIO & button) > 0) return 0; // was a false key so restart
return 1; // key ok so return valid
}
////
//////////////////////////////////////////////////////////////////////
// Start here
void main () {
unsigned int i, c;
char next;
uns16 ms;
char button_func;
init_ports();
//GPIO = 0xFF;
button_func = 0; // 0 = double shot, 1 = rapid fire - double shot is default
while (1) {
// Key hit yet ?
while ((GPIO & pin6) && (GPIO & pin7)) { ; } // wait for input going low.
// Is the key hit (and is it valid) ?
if (get_key (pin7)) { // Double shot or rapid fire
while (!(GPIO & (pin7))) { // loop until input goes high.
if (button_func == 0) { // double shot
TRISIO.2 = 0;//SET TO OUTPUT
GPIO.2 = 0; // Pin 5 output ( trigger on)
delay_ms(67);
TRISIO.2 = 1;//SET trigger TO input
GPIO.2 = 1; // trigger off
delay_ms(100);
TRISIO.2 = 0;//SET trigger TO OUTPUT
TRISIO.4 = 0; // SET X BUTTON TO OUTPUT
GPIO.2 = 0; // 2nd pin5 output (trigger on)
delay_ms(43);
GPIO = 0b11101011; // pin 5 and pin 3 on (X Button)
delay_ms(154);
TRISIO.2 = 1;//SET trigger TO INTPUT
TRISIO.4 = 1; // SET X BUTTON TO INPUT
GPIO = 0b11111111; // pin 5 and 3 off
TRISIO.5 = 0; // SET Y TO OUTPUT
GPIO.5 = 0 ;// Y BUTTON PIN2 ON
delay_ms(370);
TRISIO.5 = 1;// Y BACK TO INPUT
GPIO.5 = 1; // Y off
delay_ms(450);
TRISIO.5 = 0; // SET Y TO OUTPUT
GPIO.5 = 0; // pin2 on
delay_ms(37);
TRISIO.5 = 1;// Y BACK TO INPUT
GPIO.5 = 1; // Y OFF
delay_ms(190);
} else { // rapid fire
TRISIO.2 = 0; //TRIGGER TO OUTPUT
GPIO.2 = 0;// TRIGGER ON
delay_ms (250);
TRISIO.2 = 1;// TRIGGER BACK TO INPUT
GPIO.2 = 1;// TRIGGER OFF
delay_ms (250)
}
}
} else if (get_key (pin6)) { // Rapid reload
OPTION = 0b.0010; //0 Assigns the prescaler to TMR0, 8 clock pulses per PIC
ms = 0;
TMR0 = 2;
do {
next += 125;
while (TMR0 != next); // wait 1ms
ms++; // increment timing counter
} while (!(GPIO & pin6)); // loop until input goes high.
if (ms < 2200) { // button held less than 3000ms - rapid reload
TRISIO.4 = 0; // X SET TO OUTPUT
GPIO.4 = 0; // X ON
delay_ms (40);
TRISIO.4 = 1; //X TO INPUT
GPIO.4 = 1;// X OFF
delay_ms (1050);
TRISIO.5 = 0; // Y TO OUTPUT
GPIO.5 = 0; // Y ON
delay_ms (400);
TRISIO.5 = 1; // Y BACK TO INPUT
GPIO.5 = 1; // Y OFF
delay_ms (600);
TRISIO.5 = 0; // Y TO OUTPUT
GPIO.5 = 0; // Y ON
delay_ms (400);
TRISIO.5 = 1; // Y BACK TO INPUT
GPIO.5 = 1; // Y OFF
} else {
if (button_func == 0) {
button_func = 1;
} else {
button_func = 0;
}
}
}
} // infinite while
}
thanks rb |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Mon Apr 21, 2008 5:32 pm |
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Your question is really that you want someone to convert your program
from the CC5X compiler to CCS. |
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Guest
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| Posted: Mon Apr 21, 2008 6:09 pm |
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crap, i was thinking there were pretty much the same. Sorry. Im still very
new to this. So i guess the answer is yes to convert to ccs and convert to
16f88. any help would be greatly appreciated.
Thanks,
RB8720 |
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