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problematic array

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problematic array

Posted: Fri Jun 25, 2004 4:11 pm

I have a question on how to increment an array.

First the important stuff:
PCM 3.148
12F629

I have an array which I initialise thus:

Code:

// all variables are global \\

//numbers
#define ZERO          0x7E
#define ONE          0x0C
#define TWO          0xB6
#define THREE          0x9E
#define FOUR          0xCC
#define FIVE          0xDA
#define SIX          0xFA
#define SEVEN          0x0E
#define EIGHT          0xFE
#define NINE          0xDE

//LCD display
int digits[10] = {ZERO,ONE,TWO,THREE,FOUR,FIVE,SIX,SEVEN,EIGHT,NINE};
int digit_counter = 0; //used to keep track of displayed digit
int bit_counter = 0; //used to keep track of bits within each digit

It is used in the main loop

Code:

while (TRUE)
{
//cycle through digits 0 -> 9
   for (; digit_counter <=9; digit_counter++)
   {
      //increment array
         digits[digit_counter];

      //set clock low
      output_low(S_CLK);

      //clock bits out from the array element
      for (; bit_counter <=7; bit_counter++)
      {

         output_bit(S_DATA,shift_right(digits,1,0));

         //clock bit out
         output_high(S_CLK);
         delay_cycles(1);
         output_low(S_CLK);
      }

      //reset bit_counter
      if (8 == bit_counter)
      {
         bit_counter = 0;
      }

   }
}

What I am trying to achieve, is to clock each element of the array serially out through a port pin. It will work the first time as 'digit_counter' is initialised at 0, and I can see the code running as I expect it to via the simulator. However I cannot get the next element of the array to load. I was hoping to use 'bit_counter' to index the elements of the array?

The code compiles and when I run it through the simulator it steps over the line.... digits[digit_counter]; which I hoped was going to increment the array?

Looking at the .lst there is no code shown for this line?

Its getting late and I've probably done something silly - its just that I cant see it. All suggestions gratefully received.

adrian

Joined: 08 Sep 2003
Posts: 92
Location: Glasgow, UK


Posted: Fri Jun 25, 2004 4:14 pm

Err I don't know what happened here? Sorry for the duplication

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