I have a function that writes a block of data flash based on an indexing scheme.  I am testing using the emulator and I have had an issue with the address variable taking on the value of a generic counter variable.  This causes the FlashWrite operation to point at the wrong location.  I looked at the register window and I see that A0 holds the address value just before entering the for loop below.  When i is incremented the A0 value (and thereby the address) is cleared and takes on the value of i ( which is in R0).  If I step iterate the loop I see both A0 and R0 increment together with the same value and when i reaches the comparison value it gets cleared and goes back into the loop (not intended).  The emulator never exits the loop.  What is going on here?

unsigned char epp_write_parameters (void)

{

     unsigned char status = 9;

     unsigned short block_addr;

     unsigned char block_index;

     unsigned short address = 0;

     unsigned char data_buffer[PARAMETER_BLOCK_SIZE];

     unsigned char i = 0;

     unsigned char temp_data = 0;

     unsigned char *p_data = &temp_data;

     //Find the previously written block.

     block_addr = epp_get_address(PARAMETERS);

     block_index = *(unsigned char*)block_addr;

     //Load data portion of the buffer with the parameter data.

     for(i = 0; i <= (PARAMETER_BLOCK_SIZE - 1); i++)

     {

          data_buffer[i + 1] = system_parameters.data_byte[i];

     }

..... (extra lines left out)

}

Thanks.