CCS C Software and Maintenance Offers
FAQFAQ   FAQForum Help   FAQOfficial CCS Support   SearchSearch  RegisterRegister 

ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

CCS does not monitor this forum on a regular basis.

Please do not post bug reports on this forum. Send them to CCS Technical Support
18F4620 and AN12 setup

 
Post new topic   Reply to topic    CCS Forum Index -> General CCS C Discussion
View previous topic :: View next topic  
Author Message
Linuxbuilders



Joined: 20 Mar 2010
Posts: 193
Location: Auckland NZ

View user's profile Send private message

18F4620 and AN12 setup
PostPosted: Sun Feb 19, 2012 3:45 am     Reply with quote
Hi, I have a problem:
I use in my circuit AN0 to AN4 and then AN12

So to set it up I use:
Code:

setup_adc_ports(AN0_TO_AN4 | VSS_VDD); //set AD ports AN0 to AN4

How do I get AN12 setup if 18F4620.h does not have this option? I cannot set up ALL because I use other pins as I/O pins. I use external OSC too.
Is there any way I could do this part manually? If there is please could you help and put detailed instruction bit by bit. I have never done it before and I have no clue where to look for an answer. If there is any way to do it manually by registry modification I would like to ask for detailed examples, I do not know ASM so I depend on .h files.

Thank you

Code:

// Constants used in SETUP_ADC_PORTS() are:
// First argument:
#define NO_ANALOGS   0x0F   // None
#define ALL_ANALOG   0x00   // A0 A1 A2 A3 A5 E0 E1 E2 B2 B3 B1 B4 B0     
#define AN0_TO_AN11  0x03   // A0 A1 A2 A3 A5 E0 E1 E2 B2 B3 B1 B4       
#define AN0_TO_AN10  0x04   // A0 A1 A2 A3 A5 E0 E1 E2 B2 B3 B1         
#define AN0_TO_AN9   0x05   // A0 A1 A2 A3 A5 E0 E1 E2 B2 B3             
#define AN0_TO_AN8   0x06   // A0 A1 A2 A3 A5 E0 E1 E2 B2               
#define AN0_TO_AN7   0x07   // A0 A1 A2 A3 A5 E0 E1 E2                   
#define AN0_TO_AN6   0x08   // A0 A1 A2 A3 A5 E0 E1                     
#define AN0_TO_AN5   0x09   // A0 A1 A2 A3 A5 E0                         
#define AN0_TO_AN4   0x0A   // A0 A1 A2 A3 A5
#define AN0_TO_AN3   0x0B   // A0 A1 A2 A3
#define AN0_TO_AN2   0x0C   // A0 A1 A2
#define AN0_TO_AN1   0x0D   // A0 A1
#define AN0          0x0E   // A0

_________________
Help "d" others and then you shell receive some help from "d" others.
dyeatman



Joined: 06 Sep 2003
Posts: 1933
Location: Norman, OK

View user's profile Send private message

PostPosted: Sun Feb 19, 2012 8:07 am     Reply with quote
Look at datasheet page 224 (register 19.2) to explain why you can't do that.
_________________
Google and Forum Search are some of your best tools!!!!
Display posts from previous:   
Post new topic   Reply to topic    CCS Forum Index -> General CCS C Discussion All times are GMT - 6 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group