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Typemod using custom external ram functions

 
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treitmey



Joined: 23 Jan 2004
Posts: 1094
Location: Appleton,WI USA

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Typemod using custom external ram functions
PostPosted: Thu Apr 20, 2006 2:38 pm     Reply with quote
PCWH R3.249 I am seeing a typemod bug I can't explain.
I am using typemod for access to external memory as shown here.
http://www.ccsinfo.com/faq.php?page=addressmod
I made shell read and write functions.
The write function just prints the proposed data.
If I put in a line for "record2" I see expected data.
If I take that line out, I don't see the expected data.
Does anyone understand whats going on here?

Code:
#include <18F452.H>
#use delay(clock=40000000)
#fuses h4,nowdt,noprotect,nolvp
#use rs232(baud=19200,xmit=PIN_C0,invert,stream=DEBUG,disable_ints) // stderr(same as debug)
#case
#zero_ram
//---------------------------------------------
mr(int32 addr,int8 *data,int8 size);
mw(int32 addr,int8 *data,int8 size);
//---------------------------------------------
typemod <,mr,mw,0x0000,0xFFFF>RAM;//24 bit address ,16 bit range
//---------------------------------------------
struct  rec_struc //rec definition
{
  int16 pc;
  int16 ai;
  int8  tz;
}RAM record;
int16 RAM record2;
//====================================================================//
void main(void)
{
  setup_adc_ports(NO_ANALOGS);
  set_tris_a(0);set_tris_b(0);set_tris_c(0);set_tris_d(0);set_tris_e(0);
  printf("Start\n\r");
  record.pc=0x1122;
  record.ai=0x3344;
  record.tz=0x55;
  record2  =0x6677;  //<----------------Take out this line and it BLOWS up
  printf("DONE !\n\r");
  while(1)
  {
  }
}
//======================multi_write===========================//
mw(int32 addr,int8 *data,int8 size)
{
  int8 x;
  int32 start_size;
  start_size=size;
  fprintf(DEBUG,"write addr=%lu s=%u ",addr,size);
  for(x=0;x<size;x++,data++){
    fprintf(DEBUG,"0x%X,",*data);
  }
  fprintf(DEBUG,"\n\r");
  return(TRUE);
}
//======================multi_read===========================//
mr(int32 addr,int8 *data,int8 size){
}

Code:

//--BAD--
write addr=0 s=2 0x22,0x00,           
write addr=2 s=2 0x44,0x02,           
write addr=4 s=1 0x55,               

Code:

//--Good--
write addr=0 s=2 0x22,0x11,           
write addr=2 s=2 0x44,0x33,           
write addr=4 s=1 0x55,               
write addr=5 s=2 0x77,0x66,           


Last edited by treitmey on Thu Apr 20, 2006 3:46 pm; edited 1 time in total
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Thu Apr 20, 2006 3:34 pm     Reply with quote
Quote:
struct rec_struc //rec definition
{
int16 pc;
int16 ai;
int8 tz;
}RAM record;
int16 RAM record2;


One thing you might try is to take the "record" declaration out
of the structure and typdef the structure instead. Then use the
type to declare "record" on a separate line of code. I haven't
tested this but it's something to try. The way you describe the
problem implies that possibly CCS is looking for a typedef, and
they may have only tested it in that manner.
treitmey



Joined: 23 Jan 2004
Posts: 1094
Location: Appleton,WI USA

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PostPosted: Thu Apr 20, 2006 3:50 pm     Reply with quote
Thanks
Seems to work. Doesn't give me a "warm fuzzy" feeling tho. Wink
Code:
#include <18F452.H>
#use delay(clock=40000000)
#fuses h4,nowdt,noprotect,nolvp
#use rs232(baud=19200,xmit=PIN_C0,invert,stream=DEBUG,disable_ints) // stderr(same as debug)
#case
#zero_ram
int8 ERRORS;
#define FRAM_CHIPS 4
//-------prototype-------------------------------
mr(int32 addr,int8 *data,int8 size);
mw(int32 addr,int8 *data,int8 size);
//---------------------------------------------
typemod <,mr,mw,0x0000,0xFFFF>RAM;//24 bit address ,16 bit range
//---------------------------------------------
struct  rec_struc //rec definition
{
  int16 pc;
  int16 ai;
  int8  tz;
};
//====================================================================//
void main(void)
{
struct rec_struc RAM record;
  setup_adc_ports(NO_ANALOGS);
  set_tris_a(0);set_tris_b(0);set_tris_c(0);set_tris_d(0);set_tris_e(0);
  printf("Start\n\r");
  record.pc=0xBBAA;
  record.ai=0xDDCC;
  record.tz=0xFF;
  printf("DONE !\n\r");
  while(1)
  {
  }
}
//======================multi_write===========================//
mw(int32 addr,int8 *data,int8 size)
{
  int8 x;
  int32 start_size;
  start_size=size;
  fprintf(DEBUG,"write addr=%lu s=%u ",addr,size);
  for(x=0;x<size;x++,data++){
    fprintf(DEBUG,"0x%X,",*data);
  }
  fprintf(DEBUG,"\n\r");
  return(TRUE);
}
//======================multi_read===========================//
mr(int32 addr,int8 *data,int8 size){
}

I responded so fast, cause I came to that same conclusion. Didn't know why it acted like that tho.
treitmey



Joined: 23 Jan 2004
Posts: 1094
Location: Appleton,WI USA

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PostPosted: Thu Apr 20, 2006 4:08 pm     Reply with quote
BTW:
#byte and #locate will also screw up typemod variables
It looks like the compiler understands the use,.. but the second
byte of data transfered is corrupted again.
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