16F628 adc error

[adrianrb]

Hi all!

I´m trying to use the ADC ports from a PIC16F628, just like I can
do in 16F88, but I´m getting erros. Could someone help me?

Code (works fine in 16F88):
<pre>
#include <16F628A> // Define processador
#include "..\mudancas.h" // minha personalizacao

#fuses XT, NOWDT, NOPROTECT, NOPUT, NOLVP, NOBROWNOUT//, NOCPD, NOFCMEN, NOIESO, NOMCLR
#use delay(clock=4000000) // Informa o clock para rotinas de tempo.

#use FAST_IO(A) // portA sob meu controle
#use FAST_IO(B) // portB sob meu controle

#byte porta = 5 // endereco do port a
#byte portb = 6 // portb no endereco do port b

#bit ENB = portb.4 // sinal ENABLE
#bit RS = portb.5 // sinal RS

#define delay 500

////////////////////////////////////////////////////////////////////////////
// Prototipos obrigatorios com ";" no final.

void Inicializa(void); // nao recebem e nem devolve, valores
void Limpa(void);
void Mensagem(void);

void Linha1(char coluna); // recebem um char, ja indicando o nome
void Linha2(char coluna);

///////////////////////////////////////////////////////////////////////////
// Declaracao de variaveis em RAM
char i, posicao;

char MensRam [32]; // devo copiar da ROM para a RAM porque
// no pic nao posso fazer ponteiros para
// a memoria ROM.

//byte const Mensg_1 [33] = { "Ola Mundo!" };

char d[4] = {'0', '0', '0', '0'};
char num;

// Funções auxiliares
#include "..\util.c"

// Programa principal
void main()
{
TRISB(0); // PortB: Saida dados LCD

RS = 0;
ENB = 0;

Inicializa(); // inicializa o portb
for(;;)
{
// Leitura da porta analógica
TrisA(1);

setup_adc_ports(0);
setup_adc(ADC_CLOCK_INTERNAL);
set_adc_channel(PIN_A0);

num = read_adc();

setup_adc(ADC_OFF);

// Converte o valor num vetor
num2vet(num);

TrisA(0);

// Escreve o valor no LCD
for (i = 0; i < 4; i++)
MensRam[i] = d[i];

Mensagem(); // escrevo a mensagem
Delay_Ms(delay); // espero 1 seg
Limpa(); // limpo o portb

Delay_Ms(delay);
}
}
</pre>
Errors:

Executing: "C:\CCSC\Ccsc.exe" "lcd_rom.c" +FM +DF +LN +T -A +M +Z +Y=9 +EA
*** Error 12 "C:\Daysoft\Projetos\Pic\Testes\C\LCD1\lcd_rom.c" Line 58(9,24): Undefined identifier setup_adc_ports
*** Error 12 "C:\Daysoft\Projetos\Pic\Testes\C\LCD1\lcd_rom.c" Line 59(9,18): Undefined identifier setup_adc
*** Error 12 "C:\Daysoft\Projetos\Pic\Testes\C\LCD1\lcd_rom.c" Line 60(9,24): Undefined identifier set_adc_channel
*** Error 12 "C:\Daysoft\Projetos\Pic\Testes\C\LCD1\lcd_rom.c" Line 62(11,19): Undefined identifier read_adc
*** Error 12 "C:\Daysoft\Projetos\Pic\Testes\C\LCD1\lcd_rom.c" Line 64(9,18): Undefined identifier setup_adc
5 Errors, 0 Warnings.
Halting build on first failure as requested.
BUILD FAILED: Tue Jan 09 09:52:59 2007

Why compiler doesn´t find the functions *adc*?

Tks in advance,

Adrian

[adrian]

[adrianrb]

Adrian too??? Nice... 8-)

I get confused ´cause 16F628 datasheet shows port AN0, AN1...,
but no ADC at all...

Tks for your reply...

I´ll search for another chip.

Adrian

[Ttelmah]

The CCP module (which the 628 does have), also uses analog input pins...

Best Wishes

[adrian]