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eeprom on 18f258

 
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everybird
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eeprom on 18f258
PostPosted: Sat Mar 01, 2003 4:24 pm     Reply with quote

How do I program the eeprom on a 18f258?? On the 16f series, it was
#pragma rom 0x2100 = {0,1,0,0 } etc

to write to it when flash programing,

How do I do this on the 18fxx2 ??

Thanks in advance for your time.
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Original Post ID: 12261
R.J.Hamlett
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Re: eeprom on 18f258
PostPosted: Sun Mar 02, 2003 3:06 am     Reply with quote

:=How do I program the eeprom on a 18f258?? On the 16f series, it was
:=#pragma rom 0x2100 = {0,1,0,0 } etc
:=
:=to write to it when flash programing,
:=
:=How do I do this on the 18fxx2 ??
:=
:=Thanks in advance for your time.
The address is documented in the programming data sheet for the chip. It is 0xF00000 on the 18f chips.
You will have a further problem, with handling the change between the chips here. On the 16F, the addresses each held a 14bit word (potentially), and single bytes can be read as successive locations. On the 18F, the addresses store 16bit values, and the bytes are read in the order LSB,MSB from each location. Hence to store the 0,1,0,0 you show above to be readable in successive byte reads, requires:
#ROM 0xF00000 = { 0x100,0x0 }

Best Wishes
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Original Post ID: 12271
Neutone



Joined: 08 Sep 2003
Posts: 839
Location: Houston

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Re: eeprom on 18f258
PostPosted: Sun Mar 02, 2003 1:46 pm     Reply with quote

:=How do I program the eeprom on a 18f258?? On the 16f series, it was
:=#pragma rom 0x2100 = {0,1,0,0 } etc
:=
:=to write to it when flash programing,
:=
:=How do I do this on the 18fxx2 ??
:=
:=Thanks in advance for your time.

This is how I do it. One byte at a time. This is one of those things that should be mentioned in the manual.

#rom int8 0xF00000 = { 0b00010001 } //EEPROM byte 0
#rom int8 0xF00001 = { 0b00010000 } //EEPROM byte 1
#rom int8 0xF00002 = { 0b01000000 } //EEPROM byte 2
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This message was ported from CCS's old forum
Original Post ID: 12279
Tomi
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Re: eeprom on 18f258
PostPosted: Mon Mar 03, 2003 10:58 am     Reply with quote

It is depended on the reading implementation of any hex file of your programmer. With my own programmer (and of course my Win program) I know that the "implementation" of code and data are differential, so I can use without any problem:
#ROM 0xF00000 = {0x01,0x02,etc.}
even can use with later versions:
#ROM 0xF00000 = {"This is a data EEPROM string"};

Note that I felt myself so stupid to build a non-standard programmer... :)

:=:=How do I program the eeprom on a 18f258?? On the 16f series, it was
:=:=#pragma rom 0x2100 = {0,1,0,0 } etc
:=:=
:=:=to write to it when flash programing,
:=:=
:=:=How do I do this on the 18fxx2 ??
:=:=
:=:=Thanks in advance for your time.
:=
:=This is how I do it. One byte at a time. This is one of those things that should be mentioned in the manual.
:=
:=#rom int8 0xF00000 = { 0b00010001 } //EEPROM byte 0
:=#rom int8 0xF00001 = { 0b00010000 } //EEPROM byte 1
:=#rom int8 0xF00002 = { 0b01000000 } //EEPROM byte 2
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Original Post ID: 12307
PIC18F258
Guest







My Hellp!!
PostPosted: Mon Jul 16, 2007 2:42 pm     Reply with quote

Portugues >> Brasil

Alguem pode me ajudar estou com um problema, com o pic 18f258,

estou querendo liagr um LED mais não consigo ter como comprovar se meu codigo esta correto alguem pode me ajudar nisso Este código esta correto.

#include <p18f258.h>
#include <delays.h>
#define LED PORTCbits.RC5
void main()
{
TRISC = 0;
LATC = 1;
LED = 1;
while(1)
{
Delay10KTCYx(10);
LED = !LED;
Delay10KTCYx(10);
}
}
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon Jul 16, 2007 2:49 pm     Reply with quote

Quote:
Delay10KTCYx(10);

This is Microchip C18 compiler code.

Please ask your question in the C18 compiler forum, at the link below:
http://forum.microchip.com/tt.aspx?forumid=3
Deivison
Guest







PIC18F258
PostPosted: Wed Jul 18, 2007 10:57 am     Reply with quote

Exclamation


Brasil POrtugues!


Bom Dia Meu amigo tendo visto que você tem um grande conhecimento, perante a utilização de PIC, venho aqui para lhe pedir que se puder me ajudar por favor o faça. o meu problema e o seguinte.

Estou hoje programando em um PIC18F258, estou tendo dificuldades com ele pois tudo o que eu fiz ate hoje não deu certo!

Eu já não sei mais a quem recorrer muito obrigada pela paciência!





******************************o primeiro código foi esse*************************************** ******************************o primeiro código foi esse*************************************** ******************************o primeiro código foi esse*************************************** ******************************o primeiro código foi esse*************************************** ******************************o primeiro código foi esse***************************************


#include <p18f258.h>

#define LED PORTCbits.RC5 // Renome ando as portas do PIC

void main()
{
TRISC = 0; // Determina todo o PORTB como saída
LATC = 1; // Lê as informações do PORTB
LED = 1;
while(1)
{

LED = !LED;

}
}


******************************o segundo código foi esse*************************************** ******************************o segundo código foi esse*************************************** ******************************o segundo código foi esse*************************************** ******************************o segundo código foi esse*************************************** ******************************o segundo código foi esse*************************************** ******************************o segundo código foi esse***************************************



#include <p18f258.h>


#pragma config OSC = XT //Configuração do oscilador tipo XT


#define C PORTCbits.RC0 //Renome ando as portas do PIC
#define C1 PORTCbits.RC1
#define C2 PORTCbits.RC2
#define C3 PORTCbits.RC3
#define C4 PORTCbits.RC4
#define C5 PORTCbits.RC5
#define c6 PORTCbits.RC6
#define C7 PORTCbits.RC7


#define B PORTBbits.RB0
#define B1 PORTBbits.RB1
#define B2 PORTBbits.RB2
#define B3 PORTBbits.RB3
#define B4 PORTBbits.RB4
#define B5 PORTBbits.RB5
#define B6 PORTBbits.RB6
#define B7 PORTBbits.RB7


#define A PORTAbits.RA0
#define A1 PORTAbits.RA1
#define A2 PORTAbits.RA2
#define A3 PORTAbits.RA3
#define A4 PORTAbits.RA4
#define A5 PORTAbits.RA5


void wait() // tem a função de causar uma pequena interrupção
{
int x;
x = 20000;

for (;x>0; x--);
}


void pause() // tem a função de causar uma pequena interrupção
{
int x;
x = 20000;
for(;x>0; x--){
B = 1; // determina esta porta para liberar uma corrente
}

wait();
int x;
x = 20000;

for(;x>0; x--){

B = 0; // determina esta porta para bloquear uma corrente
}
}

void main()
{

TRISB = 0; // Determina todo o PORTB como saída
LATB= 0; // Lê as informações do PORTB
TRISA = 0xFF; // Determina como entrada
LATA= 1; // Lê a entrada
TRISC = 0xFF;
LATB= 1;

while(1)
{

C = 1;
C1 = 1;
C2 = 1;
C3 = 1;
C4 = 1;
C5 = 1;
C6 = 1;
C7 = 1;
B = 1;


if(PORTAbits.RA0)
{
B = 1;
}
else
{
pause(); // tem a função de causar uma pequena interrupção

B = 0;// acende uma determinada porta RB0

wait(); // tem a função de causar uma pequena interrupção


pause(); // tem a função de causar uma pequena interrupção
}

B1 = 1;
B2 = 1;
B3 = 1;
B4 = 1;
B5 = 1;
B6 = 1;
B7 = 1;

A = 1;
A1 =1;
A2 = 1;
A3 = 1;
A4 = 1;
A5 = 1;


}
}
Bill Boucher



Joined: 04 Feb 2005
Posts: 34
Location: Chatham,ON,CA

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Re: eeprom on 18f258
PostPosted: Wed Jul 18, 2007 7:13 pm     Reply with quote

everybird wrote:
How do I program the eeprom on a 18f258?? On the 16f series, it was
#pragma rom 0x2100 = {0,1,0,0 } etc

to write to it when flash programing,

How do I do this on the 18fxx2 ??

Thanks in advance for your time.
___________________________
This message was ported from CCS's old forum
Original Post ID: 12261


Dude, you can still put the default eeprom values into your C source using the #ROM directive. Do it like this...

Code:


// The following initializes the locations of the data EEPROM
//  using the #ROM directive
#if defined (__PCM__)
#rom 0x2100={30,0,0x58,0x02,0x20,0x1C,50,0,0xEC,0,8,0,50,0,248,0,38,0,0x58,0x02,0,0}
#elif defined(__PCH__)
#rom int 0xf00000={30,0,0x58,0x02,0x20,0x1C,50,0,0xEC,0,8,0,50,0,248,0,38,0,0x58,0x02,0,0}
#endif
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Jul 18, 2007 8:15 pm     Reply with quote

He's not using CCS. He's using the Microchip C18 compiler.
#rom doesn't work.

Here is my answer to him in Portuguese:
Este forum é para o compilador de CCS, não compilador C18.
Use por favor o forum do microchip C18.
http://forum.microchip.com/tt.aspx?forumid=3
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