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Hello! I need communication between a pic18F4550 and PC to download values from an adc and store in an eeprom! I need some code to make this work, because the code that I do, not work! Please, if som ...

Wake every minute and do the code in interrupt.
Do you have a signal on the INT2 pin of the 18F4550 that has a
rising edge once per minute ? Describe the signal on the INT2 pin.
What is the fre ...

Hello everybody!

I need help once more, I have a external interrupt, (INT_EXT2). I want to do the following: The PIC must wake from minute to minute and do the interrupt code, but I don´t know how ...

I need to use usb with pic, i use this code:
#include <usb_cdc.h>
...
void usb_string(void){
int i;
for(i=0;;i++){
if(string[i]!='\0' ...

Thanks to all, I finally put this to work! Thanks for the help!
It was the time of the adc, that wasn't enough to convert. Problem solved.

spi_write(controlo);
//delay_ms(50); <<-- you need some delay here to let ADC convert!
RB2=spi_read(0); /*guarda os 1ºs 8 bits*/
delay_ms(25);
RB3=spi_ ...

Here is the code:

#include <18F4550.h>
#DEVICE ADC=8 // resolução ADC
#fuses HSPLL,NOWDT,NOPROTECT,NOLVP,NODEBUG,USBDIV,PLL5,CPUDIV1,VREGEN
#use delay(clock=48000000)
...
...

I've done everything. I don't understand the problem. If somebody have a code with max1110 for pic18f4550, please post here! Thanks!

PS: I´m using internal clock MAX1110, so i don´t know if the ...

The external adc max1110 is working, but the values are not what I expect! I'm testing for 0v, he give me value 96, and for 5v he give me 225! For lcd I'm using printf("value %c",valorADC) ...

One more thing, if you can say: The max1110 ADC has 8 bits, so to a input 0-5 volt, i want to show in LCD the result of the convertion from 0 to 256(number of state exits in a 8 bit ADC), being 0v - 0 ...

the crystal on the pic is 20MHz, and it`s really slave or master for the external adc?since i have one external rtc also master!

If you want help, you need to post a link to the ADC data sheet.

http://pdfserv.maxim-ic.com/en/ds/1676.pdf

here it is, max1110, 8 channel Analog inputs! Tk´s

Tk´s for the help, but the problem still remains,
i don´t know to solve it, i´ve tried many different things but the LCD only display 1 ADC channel, the other channels values are zero always. and ...

I have a problem. The external adc only reads the first value and shows in lcd, and the next ones are zero. I'm using spi. The code is below:

unsigned char valorADC;
unsigned char RB2;
unsigned ...