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disable undesired outputs on P1A, P1B, P1C and P1D

 
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pokiko



Joined: 27 Jul 2007
Posts: 33

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disable undesired outputs on P1A, P1B, P1C and P1D
PostPosted: Wed Jul 09, 2008 1:32 pm     Reply with quote
hi

i am using pic18f4520 with 16Mhz osc. i have an input from the TOCKI pin that i use for ccp. Also keypad is connected to portD.
when i push on some of the buttons on keypad, some undesired inputs appear on the LCD. port_d pins of d5,d6,d7 causes this situation, these three pins must configured as input.
I guess P1A,P1B,P1C and P1D cause this situation ,which are for ECCP, all have to be shutdown, . so how can i disable them. i want to use ccp module in compare mode but i dont want to use eccp module.
thanks.
Code:

          setup_oscillator(OSC_16MHZ);           
            SETUP_TIMER_0( RTCC_EXT_L_TO_H | RTCC_DIV_1);   
            setup_timer_1(T1_DISABLED);
            setup_timer_2(T2_DIV_BY_16,250,15);     
            output_low( PIN_E0 );           
            setup_comparator(NC_NC_NC_NC);                               
            setup_CCP1( CCP_COMPARE_INT ); 
            setup_CCP2( CCP_COMPARE_INT );
            disable_interrupts( GLOBAL );             
           
            enable_interrupts(INT_TIMER0);
            enable_interrupts(INT_CCP1);
            enable_interrupts(INT_CCP2);
           
            setup_psp(PSP_DISABLED);
            setup_spi(SPI_SS_DISABLED);
                       
            SETUP_ADC(ADC_CLOCK_DIV_32);           
            setup_adc_ports(AN0_TO_AN3);
           
            set_timer0(65535);    // Arm external trigger
            CCP_1=maxPERYOD;       
            CCP_2=CCP_1 + 5000;  // Second pulse 1ms after pulse 1
            set_timer1(0);


Last edited by pokiko on Thu Jul 10, 2008 1:27 am; edited 3 times in total
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Jul 09, 2008 2:18 pm     Reply with quote
Post your compiler version.
pokiko



Joined: 27 Jul 2007
Posts: 33

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PostPosted: Wed Jul 09, 2008 3:45 pm     Reply with quote
My compiler version is 4.049.

I have got the solution. It was about the connections of portD. they are also connected to LCD. I added a delay_us then it worked.
thanks PCM programmer.
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