problem with PIC18F24K22 (PIC18F45K22/PIC18F46K22)

[Ahmmed Razu]

I am in problem of working with PIC18F24K22 (PIC18F2XK22 or PIC18F4XK22) using Hi_TECH compiler. I need a simple LED blinking code or other.

When I write

RB0 = 1;

the compiler shows "undefined identifier "RB0"

please anyone upload a sample code.

 

[tpetar]

How you choose to use Hi-Tech ?

Did you initialize ports?

You can use delay.


Sample code:

#include <htc.h>

#define _XTAL_FREQ 8000000 //setting the crystal frequency to 8MHz

void main()
{

PORTB = 0xff; //Initialising the port.
TRISB = 0x00; //Sets port B as an output port

while(1)
{

PORTB=0xff; //Clears all PORTB pins (LOW)
__delay_ms(100); //Hold for 100ms
PORTB=0x00; //Sets all PORTB pins (HIGH)
__delay_ms(900); //Hold for 900ms
}
}

PIC Programs 01: LED blinking
**broken link removed**

PIC18F452 LED Blinking Code + Proteus Simulation
http://saeedsolutions.blogspot.com/2012/05/pic18f452-led-blinking-code-proteus.html




Best regards,
Peter

:wink:

 

[Ahmmed Razu]

Its for PIC16F877 but i am asking for PIC18F2XK22 or PIC18F4XK22.

As far as I know Hi_TECH is an omniscient compiler and produces more efficient code than other compiler.
**broken link removed**

 

[tpetar]

Its for PIC16F877 but i am asking for PIC18F2XK22 or PIC18F4XK22.

Code is the same.

As far as I know Hi_TECH is an omniscient compiler and produces more efficient code than other compiler.
**broken link removed**

Its marketing. Phrase "more efficient code" is just fog, but you can compare code optimization between various compilers, supports, offered libraries,.... maybe you can use IAR.

Use compiler what you know to use on best way.



Best regards,
Peter

 

[Ahmmed Razu]

not same confuguration bits and definition strategy.

I have compiled same code in mikroC, CCS, MPLAB C, Hi_TECH. where Hi_TECH produces more efficient code (less memory, high speed).

Anyway i like your advice always as you have more experience than mine (helped me yesterday).

Thanks.

 

[tpetar]

In any case best is compiler what you know to use. Less memory usage you can achieve with better coding and configuring optimization level in compilers.

These codes should works on PIC18F45K22. Just adjust crystal (PLL) speed.


See code example in MikroC :

void main() {

  TRISC = 0;           // set direction to be output

  do 
     {
     LATC = 0x00;       // Turn OFF LEDs on PORTC
     Delay_ms(1000);    // 1 second delay
     LATC.F0 = 1;      //Turn LED On
     Delay_ms(1000);   // 1 second delay
     }
  while(1);          // Endless loop
}

Used ROM 86 bytes. MikroC is configured on 4 level of optimization, 5 level also gives 86 bytes.
Used RAM 21 bytes.


Configuration window (some of options):





- - - Updated - - -

How to write configuration bits for PIC micro-controllers in Hi-Tech
https://saeedsolutions.blogspot.com/2012/05/how-to-write-configuration-bits-for-pic.html

PIC18F45K22 include file:

;==========================================================================
;
;   IMPORTANT: For the PIC18 devices, the __CONFIG directive has been
;              superseded by the CONFIG directive.  The following settings
;              are available for this device.
;
;   Oscillator Selection bits:
;     FOSC = LP            LP oscillator
;     FOSC = XT            XT oscillator
;     FOSC = HSHP          HS oscillator (high power > 16 MHz)
;     FOSC = HSMP          HS oscillator (medium power 4-16 MHz)
;     FOSC = ECHP          EC oscillator, CLKOUT function on OSC2 (high power, >16 MHz)
;     FOSC = ECHPIO6       EC oscillator, port function on RA6 (high power, >16 MHz)
;     FOSC = RC            External RC, CLKOUT on OSC2
;     FOSC = RCIO6         External RC oscillator, port function on RA6
;     FOSC = INTIO67       Internal oscillator block, port function on RA6 and RA7
;     FOSC = INTIO7        Internal oscillator block, CLKOUT function on RA6, port function on RA7
;     FOSC = ECMP          EC oscillator, CLKOUT on OSC2 (medium power, 4-16 MHz)
;     FOSC = ECMPIO6       EC oscillator (medium power, 4-16 MHz)
;     FOSC = ECLP          EC oscillator, CLKOUT on OSC2 (low power, < 4 MHz)
;     FOSC = ECLPIO6       EC oscillator  (low power, < 4 MHz)
;
;   4X PLL Enable:
;     PLLCFG = OFF         Oscillator used directly
;     PLLCFG = ON          Oscillator multiplied by 4
;
;   Primary clock enable bit:
;     PRICLKEN = OFF       Primary clock can be disabled by software
;     PRICLKEN = ON        Primary clock is always enabled
;
;   Fail-Safe Clock Monitor Enable bit:
;     FCMEN = OFF          Fail-Safe Clock Monitor disabled
;     FCMEN = ON           Fail-Safe Clock Monitor enabled
;
;   Internal/External Oscillator Switchover bit:
;     IESO = OFF           Oscillator Switchover mode disabled
;     IESO = ON            Oscillator Switchover mode enabled
;
;   Power-up Timer Enable bit:
;     PWRTEN = ON          Power up timer enabled
;     PWRTEN = OFF         Power up timer disabled
;
;   Brown-out Reset Enable bits:
;     BOREN = OFF          Brown-out Reset disabled in hardware and software
;     BOREN = ON           Brown-out Reset enabled and controlled by software (SBOREN is enabled)
;     BOREN = NOSLP        Brown-out Reset enabled in hardware only and disabled in Sleep mode (SBOREN is disabled)
;     BOREN = SBORDIS      Brown-out Reset enabled in hardware only (SBOREN is disabled)
;
;   Brown Out Reset Voltage bits:
;     BORV = 285           VBOR set to 2.85 V nominal
;     BORV = 250           VBOR set to 2.50 V nominal
;     BORV = 220           VBOR set to 2.20 V nominal
;     BORV = 190           VBOR set to 1.90 V nominal
;
;   Watchdog Timer Enable bits:
;     WDTEN = OFF          Watch dog timer is always disabled. SWDTEN has no effect.
;     WDTEN = NOSLP        WDT is disabled in sleep, otherwise enabled. SWDTEN bit has no effect
;     WDTEN = SWON         WDT is controlled by SWDTEN bit of the WDTCON register
;     WDTEN = ON           WDT is always enabled. SWDTEN bit has no effect
;
;   Watchdog Timer Postscale Select bits:
;     WDTPS = 1            1:1
;     WDTPS = 2            1:2
;     WDTPS = 4            1:4
;     WDTPS = 8            1:8
;     WDTPS = 16           1:16
;     WDTPS = 32           1:32
;     WDTPS = 64           1:64
;     WDTPS = 128          1:128
;     WDTPS = 256          1:256
;     WDTPS = 512          1:512
;     WDTPS = 1024         1:1024
;     WDTPS = 2048         1:2048
;     WDTPS = 4096         1:4096
;     WDTPS = 8192         1:8192
;     WDTPS = 16384        1:16384
;     WDTPS = 32768        1:32768
;
;   CCP2 MUX bit:
;     CCP2MX = PORTB3      CCP2 input/output is multiplexed with RB3
;     CCP2MX = PORTC1      CCP2 input/output is multiplexed with RC1
;
;   PORTB A/D Enable bit:
;     PBADEN = OFF         PORTB<5:0> pins are configured as digital I/O on Reset
;     PBADEN = ON          PORTB<5:0> pins are configured as analog input channels on Reset
;
;   P3A/CCP3 Mux bit:
;     CCP3MX = PORTE0      P3A/CCP3 input/output is mulitplexed with RE0
;     CCP3MX = PORTB5      P3A/CCP3 input/output is multiplexed with RB5
;
;   HFINTOSC Fast Start-up:
;     HFOFST = OFF         HFINTOSC output and ready status are delayed by the oscillator stable status
;     HFOFST = ON          HFINTOSC output and ready status are not delayed by the oscillator stable status
;
;   Timer3 Clock input mux bit:
;     T3CMX = PORTB5       T3CKI is on RB5
;     T3CMX = PORTC0       T3CKI is on RC0
;
;   ECCP2 B output mux bit:
;     P2BMX = PORTC0       P2B is on RC0
;     P2BMX = PORTD2       P2B is on RD2
;
;   MCLR Pin Enable bit:
;     MCLRE = INTMCLR      RE3 input pin enabled; MCLR disabled
;     MCLRE = EXTMCLR      MCLR pin enabled, RE3 input pin disabled
;
;   Stack Full/Underflow Reset Enable bit:
;     STVREN = OFF         Stack full/underflow will not cause Reset
;     STVREN = ON          Stack full/underflow will cause Reset
;
;   Single-Supply ICSP Enable bit:
;     LVP = OFF            Single-Supply ICSP disabled
;     LVP = ON             Single-Supply ICSP enabled if MCLRE is also 1
;
;   Extended Instruction Set Enable bit:
;     XINST = OFF          Instruction set extension and Indexed Addressing mode disabled (Legacy mode)
;     XINST = ON           Instruction set extension and Indexed Addressing mode enabled
;
;   Background Debug:
;     DEBUG = ON           Enabled
;     DEBUG = OFF          Disabled
;
;   Code Protection Block 0:
;     CP0 = ON             Block 0 (000800-001FFFh) code-protected
;     CP0 = OFF            Block 0 (000800-001FFFh) not code-protected
;
;   Code Protection Block 1:
;     CP1 = ON             Block 1 (002000-003FFFh) code-protected
;     CP1 = OFF            Block 1 (002000-003FFFh) not code-protected
;
;   Code Protection Block 2:
;     CP2 = ON             Block 2 (004000-005FFFh) code-protected
;     CP2 = OFF            Block 2 (004000-005FFFh) not code-protected
;
;   Code Protection Block 3:
;     CP3 = ON             Block 3 (006000-007FFFh) code-protected
;     CP3 = OFF            Block 3 (006000-007FFFh) not code-protected
;
;   Boot Block Code Protection bit:
;     CPB = ON             Boot block (000000-0007FFh) code-protected
;     CPB = OFF            Boot block (000000-0007FFh) not code-protected
;
;   Data EEPROM Code Protection bit:
;     CPD = ON             Data EEPROM code-protected
;     CPD = OFF            Data EEPROM not code-protected
;
;   Write Protection Block 0:
;     WRT0 = ON            Block 0 (000800-001FFFh) write-protected
;     WRT0 = OFF           Block 0 (000800-001FFFh) not write-protected
;
;   Write Protection Block 1:
;     WRT1 = ON            Block 1 (002000-003FFFh) write-protected
;     WRT1 = OFF           Block 1 (002000-003FFFh) not write-protected
;
;   Write Protection Block 2:
;     WRT2 = ON            Block 2 (004000-005FFFh) write-protected
;     WRT2 = OFF           Block 2 (004000-005FFFh) not write-protected
;
;   Write Protection Block 3:
;     WRT3 = ON            Block 3 (006000-007FFFh) write-protected
;     WRT3 = OFF           Block 3 (006000-007FFFh) not write-protected
;
;   Configuration Register Write Protection bit:
;     WRTC = ON            Configuration registers (300000-3000FFh) write-protected
;     WRTC = OFF           Configuration registers (300000-3000FFh) not write-protected
;
;   Boot Block Write Protection bit:
;     WRTB = ON            Boot Block (000000-0007FFh) write-protected
;     WRTB = OFF           Boot Block (000000-0007FFh) not write-protected
;
;   Data EEPROM Write Protection bit:
;     WRTD = ON            Data EEPROM write-protected
;     WRTD = OFF           Data EEPROM not write-protected
;
;   Table Read Protection Block 0:
;     EBTR0 = ON           Block 0 (000800-001FFFh) protected from table reads executed in other blocks
;     EBTR0 = OFF          Block 0 (000800-001FFFh) not protected from table reads executed in other blocks
;
;   Table Read Protection Block 1:
;     EBTR1 = ON           Block 1 (002000-003FFFh) protected from table reads executed in other blocks
;     EBTR1 = OFF          Block 1 (002000-003FFFh) not protected from table reads executed in other blocks
;
;   Table Read Protection Block 2:
;     EBTR2 = ON           Block 2 (004000-005FFFh) protected from table reads executed in other blocks
;     EBTR2 = OFF          Block 2 (004000-005FFFh) not protected from table reads executed in other blocks
;
;   Table Read Protection Block 3:
;     EBTR3 = ON           Block 3 (006000-007FFFh) protected from table reads executed in other blocks
;     EBTR3 = OFF          Block 3 (006000-007FFFh) not protected from table reads executed in other blocks
;
;   Boot Block Table Read Protection bit:
;     EBTRB = ON           Boot Block (000000-0007FFh) protected from table reads executed in other blocks
;     EBTRB = OFF          Boot Block (000000-0007FFh) not protected from table reads executed in other blocks
;
;==========================================================================

One advice always look to buy PIC18F46K22 if possible. Price is the same, but this uC have more space for program 64KB (45 have 32KB), EEPROM size is 1KB (45 have 256bytes), RAM 3896bytes (45 have 1536bytes). :smile:



Best regards,
Peter

:wink:

 

[embpic]

Hello i am using 16f876a plz help to configure porta to use porta as i/p and o/p.
And give me also details of if i wajt to use ADC.

 

[tpetar]

Better make new thread, this will be like thread hijack.

Code for what compiler ?

 

[Ahmmed Razu]

(PIC18F2XK22/PIC18F4Xk22)
Hello Peter, if i define configuration bits for FOSC = HSMP, HS oscillator (medium power 4-16 MHz). But i need to connect 2MHz crystal in RA6 and RA7 pin.
Will there be any problem in operation?
As there is no mode for 2MHz external HS crystal. I need this because i have to generate slow PWM (200Hz). exact 200Hz generation is not possible but 200.4Hz.

 

[tpetar]

The slowest hardware PWM you can get on a PIC18 based uC is FOSC/16384. If you need slower PWM, you have to do it with code. You can use timer interrupt.


Best regards,
Peter

- - - Updated - - -

Also see these PWM calculator links:

http://eng-serve.com/pic/pic_pwm.html
http://calculator-sundar.hpage.co.in/pic-pwm_88966258.html