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printf problem (Solved)

 
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Jerry I



Joined: 14 Sep 2003
Posts: 96
Location: Toronto, Ontario, Canada

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printf problem (Solved)
PostPosted: Tue Mar 01, 2016 9:03 pm     Reply with quote
Thank you in advance for any help.

I got a new PIC16F1619 to use CLC Functions

I have used the PIC16F1509 with no problems. The code I ported is from the PIC16F1509 which
worked with no problems.

Compiler version PCM 5.052

The problem is the interupt #int_timer2 routine.

If I uncomment any code in the #int_timer2 routine the printf("Hello World\r\n")
in the main() loop code will get corrupted (chopped up).

I will post part of my program which will compile.

Code:

#device PIC16F1619

  #include <16F1619.h>
  #fuses intrc_io, nowdt, noprotect, nolvp, put
  #fuses nomclr, nodebug

  #device *=16
  #device adc=8
 
#byte TRISA = getenv("SFR:TRISA")
#byte TRISB = getenv("SFR:TRISB")
#byte TRISC = getenv("SFR:TRISC")


// #define CLOCK98MHZ
// #define CLOCK8MHZ
#define CLOCK16MHZ

#define TEST_BIT rc1
#define TEST_BIT2 rc2

#define PHASE_B   ra3
#define PHASE_A   rc7
// #define EL_PHASE_A   rd2
// #define EL_PHASE_B   rd3

#case

#ifdef CLOCK8MHZ
  #use delay(clock=8000000, internal)    //one instruction=0.2us
#endif

#ifdef CLOCK16MHZ
  #use delay(clock=16000000, internal)    //one instruction=0.2us
#endif

#ifdef CLOCK98MHZ
  #use delay(clock=9830400)   /////////// Check Crystal Value ////////////
#endif

#define BAUD1_SPEED 9600
#define BAUD2_SPEED 19200
#define BAUD3_SPEED 38400

#use rs232(baud=BAUD1_SPEED,xmit=PIN_B7,rcv=PIN_B5, ERRORS)

int32 tmr0cnt, tmr1cnt;

signed int16 encDelta;
signed int16 last;
signed int32 enc_cnt;
int1 last_A, last_B, new_A, new_B, A_error, B_error;
int16 error_A_cnt, error_B_cnt;


signed int16
DnCount,                             // Holds accumulated 'up' pulses
UpCount,                             // Holds accumulated 'down' pulses
prevDnCount,                         // Previous Holds accumulated 'up' pulses
prevUpCount,                         // Previous Holds accumulated 'down' pulses
mvelocity,                           // Measured motor velocity
prev_mvelocity                       // Holds prev UP/DOWN Counts
;

signed int32
travel_to,
position,                            // Commanded position.
mposition;                           // Actual measured position.


#int_timer2             // Quadrature Encoder read counters
void timer2_isr(void)
{
    signed int16 new, diff;

    mvelocity = DnCount;                 // UNCOMMENTING ANY OF THESE LINES printf gets corrupt
    mvelocity -= UpCount;                // UNCOMMENTING ANY OF THESE LINES printf gets corrupt
//!    prev_mvelocity = mvelocity;          // UNCOMMENTING ANY OF THESE LINES printf gets corrupt
//!
//!    UpCount = tmr0cnt + get_timer0();    // UNCOMMENTING ANY OF THESE LINES printf gets corrupt
//!    DnCount = get_timer1();              // UNCOMMENTING ANY OF THESE LINES printf gets corrupt
}

#int_timer0             // Quadrature Encoder read counters
void timer0_isr(void)
{
    tmr0cnt = tmr0cnt + 0x0100;
}

void main()
{
    signed int16 cnt = 0;

   
    setup_adc(ADC_OFF);

    TRISA = 0b00101011;
    port_a_pullups(0x04);

    TRISB = 0b11110111;   // All Inputs Lower nibble Interrupt on change

    TRISC = 0b11010000;

    setup_timer_0(RTCC_EXT_L_TO_H|RTCC_DIV_1);

    setup_timer_1(T1_EXTERNAL|T1_DIV_BY_1|T1_EXTERNAL_SYNC);   

    tmr0cnt = 0L;
    tmr1cnt = 0L;

    set_timer0(0);
    set_timer1(0L);

    setup_timer_2(T2_DIV_BY_4, 64, 10);
   
    mvelocity = 0;
    prev_mvelocity = 0;
    DnCount = 0;
    UpCount = 0;
    prevUpCount = 0;
    prevDnCount = 0;
    mposition = 0;
       
    clear_interrupt(INT_TIMER0);    // Timer
    clear_interrupt(INT_TIMER2);    // Timer

    enable_interrupts(INT_TIMER0);     // TIMER2 Int
    enable_interrupts(INT_TIMER2);     // TIMER2 Int

    enable_interrupts(GLOBAL);
   
    printf("Hello World Test \r\n\r\n");
   
    while(TRUE)
    {
        printf("Hello World\r\n");
        delay_ms(2000);
    }
}


[img]http://postimg.org/image/5ewb01cid/[/img]

Any Ideas?? Question

Thanks

Jerry

Last edited by Jerry I on Wed Mar 02, 2016 7:58 pm; edited 1 time in total
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Tue Mar 01, 2016 9:30 pm     Reply with quote
Quote:
If I uncomment any code in the #int_timer2 routine the printf("Hello
World\r\n") in the main() loop code will get corrupted (chopped up).

That's the symptom of a software UART with its bit timing disrupted by
interrupts. You can see it's a software UART by looking at the .LST file.

To fix it you need to use a hardware UART. Just by playing around with it,
I was able to get the setup code that gives a hardware UART:
Code:

#pin_select U1TX = PIN_B7
#pin_select U1RX = PIN_B5

#use rs232(baud=BAUD1_SPEED, ERRORS, UART1)

This can be confirmed by looking at the .LST file. You will see it's using
the hardware UART registers.
Jerry I



Joined: 14 Sep 2003
Posts: 96
Location: Toronto, Ontario, Canada

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PostPosted: Wed Mar 02, 2016 8:04 pm     Reply with quote
Thanks again PCM Programmer.

This is the first time I used a Pic where the use of pin_select for a peripheral.

Now I wondering if the timers that I am using also require to define external input pins as T0CKI and T1CKI with pin_select??.

Thanks again.

Jerry
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Thu Mar 03, 2016 1:48 am     Reply with quote
Quote:

Now I wondering if the timers that I am using also require to define
external input pins as T0CKI and T1CKI with pin_select ?

No, you don't have to. They have default pins. See this table in the
16F1619 data sheet: Table 13-1: PPS Input Register Reset Values
The default pin for Timer0 external clock is RA2.
The default pin for Timer1 external clock is RA5.
Jerry I



Joined: 14 Sep 2003
Posts: 96
Location: Toronto, Ontario, Canada

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PostPosted: Thu Mar 03, 2016 2:06 pm     Reply with quote
Thanks for info,

What about the CLC outputs, I will have 2 each feeding the 2 external clock inputs. Do I have to set pin_select pins?.

Thanks again,

Jerry
temtronic



Joined: 01 Jul 2010
Posts: 9241
Location: Greensville,Ontario

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PostPosted: Thu Mar 03, 2016 2:49 pm     Reply with quote
This again is easy stuff... just read the datasheet....page 6, table 1 shows the available inputs/outputs including the CLC peripheral.
While I don't have or use this PIC it does seem fairly easy to use....
CCS may have an example of using the CLC, I haven't checked and my version of PCM is rather old, bound to be some 'how to use' stuff in the manual. Interesting PIC though I like the idea of the NCO.......

too many PICs... too little time

Jay
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