hola chicos
Recien estoy empezando con C y ya tengo unos problemones terribles!!!! jajajaja. Hay que tomarselo con calma....
En fin, lo que quiero hacer yo es lo siguiente:
Tengo un Driver para el AD7705 con diferentes funciones.
Me escribi un Header y un Main Programm en el cual llamo las funciones del Driver del AD7705.
Main:
Codigo:
#include<ADC_7705.h>
void main()
{
long int d;
void adc_init();
d = read_adc_value(0);
}
Header:
Codigo:
#include<18f252.h>
#fuses XT,NOWDT,NOLVP
#use delay(clock=4000000)
adc_init();
long int read_adc_value(int1 ch);
adc_disable();
Driver:
Codigo:
#include<ADC_7705.h>
//connection pins to the PIC
#define ADC_DRDY PIN_B1
#define ADC_DO PIN_C4
#define ADC_DI PIN_C5
#define ADC_RESET PIN_B2
#define ADC_CS PIN_B3
#define ADC_CLK PIN_C3
//Operation modes
#define ADC_NORMAL 0x00
#define ADC_SELF 0x40
#define ADC_ZERO_SCALE 0x80
#define ADC_FULL_SCALE 0xc0
//Gain settings
#define ADC_GAIN_1 0x00
#define ADC_GAIN_2 0x08
#define ADC_GAIN_4 0x10
#define ADC_GAIN_8 0x18
#define ADC_GAIN_16 0x20
#define ADC_GAIN_32 0x28
#define ADC_GAIN_64 0x30
#define ADC_GAIN_128 0x38
//Polar operations
#define ADC_BIPOLAR 0x04
#define ADC_UNIPOLAR 0x00
//update rates
#define ADC_50 0x04
#define ADC_60 0x05
#define ADC_250 0x06
#define ADC_500 0x07
void write_adc_byte(BYTE data)
{
BYTE i;
output_low(ADC_CS);
//for(i=1;i<=8;++i) {
//output_low(ADC_CLK);
//output_bit(ADC_DI, shift_left(&data,1,0));
//output_high(ADC_CLK);
//}
spi_write(data);
output_high(ADC_CS);
}
long int read_adc_word()
{
BYTE i;
long data;
output_low(ADC_CS);
//for(i=1;i<=16;++i) {
//output_low(ADC_CLK);
//output_high(ADC_CLK);
//shift_left(&data,2,input(ADC_DO));
//}
data = spi_read;
output_high(ADC_CS);
return data;
}
//setup the device paramaters(mode, gainsetting, polar operation and output rate)
void setup_adc_device(int calmode, int gainsetting, int operation, int rate)
{
write_adc_byte( 0x20 );//Communications Register set to write of clock register
write_adc_byte( rate );//Clock Register info here
write_adc_byte( 0x10 );//Communications Register set to write of setup register
write_adc_byte( calmode|gainsetting|operation);//Setup Register info here
}
//initailaization routine
void adc_init()
{
output_low(ADC_RESET);
output_high(ADC_CLK);
output_high(ADC_CS); //Set low to AD7705 chip select low pin
output_high(ADC_RESET); //Set high to AD7705 reset low pin
setup_adc_device(ADC_SELF,ADC_GAIN_1,ADC_BIPOLAR,ADC_50);
setup_spi(SPI_MASTER | SPI_H_TO_L | SPI_CLK_DIV_16);
delay_ms(3000);
}
//read an adc value from the specified channel
long int read_adc_value(int1 ch)
{
long int value;
while ( !input(ADC_DRDY) );
if(ch)
write_adc_byte(0x38);//communications register set to read of data register of channel 1
else
write_adc_byte(0x39);//communications register set to read of data register of channel 0
value=read_adc_word();
while ( input(ADC_DRDY) );
return value;
}
//disable the a/d conversion
void adc_disable()
{
write_adc_byte( 0x20 );//Communications Register set to write of clock register
write_adc_byte( 0x10 );//Clock Register info here
}
//Convert the value read to volts
float convert_to_volts(long data){
return ((float)data*2.5/0xffff);
}
Como se ve quiero llamar las funciones del Driver en mi Main programa y recibo siempre un error del Compiler (CCS):
Executing: "C:ProgrammePICCCcsc.exe" "ADC_Main.C" "-I C:ProgrammePICCDevices" +FH +DF +LN +T -A +M +Z +Y=9 +EA
*** Error 12 "U:PIC_DemosADCADC_Main.C" Line 12(3,4): Undefined identifier d
1 Errors, 0 Warnings.
Halting build on first failure as requested.
BUILD FAILED: Wed May 12 15:43:19 2004
Yo estaria muy agradecido si alguien me podria ayudar a solucionar este problema, dado que yo soy un novato en el mundo del C.
Muchas gracias, pablo.
