Migrating from 18F252 to 18F2620, quick question about ADC!

[jseidmann]

Hey everyone,

I have been using the 18F252 for some time now and am in the process of trying to migrate to the 18F2620 which has more rom/ram/eeprom, etc...

However, when I compile with the new #include <18F2620.h>, it flags the following line as an error:

setup_adc_ports(RA0_RA1_ANALOG_RA3_REF);

I looked through the files for both the 18F252 and the 18F2620 and it shows that tag "RA0_RA1_ANALOG_RA3_REF" as an "!old only provided for compatibility" on the 18F252.

I looked at teh 18F2620.h file and see nothing similar. From the options in the 18F2620 header file, should I use something like:

setup_adc_ports(AN0_TO_AN1 | VREF_VREF); ???

Let me know.

Thanks!

[jseidmann]

Hi,

In response to my post above, I have tried the following lines with no luck. Is there anything i'm doing wrong?

setup_adc_ports(AN0_TO_AN1 | VSS_VREF);

setup_adc_ports(AN0_TO_AN1 | VSS_VDD);

setup_adc_ports(AN0_TO_AN1 | VREF_VREF);

setup_adc_ports(AN0_TO_AN1 | VREF_VDD);

I tried compiling 4 times with each of the 4 options above with no luck. Any suggestions?

[Mark]

Read the datasheet, specifically on setting up the ADC. Set the values directly in the ADCON registers.