![](templates/subSilver/images/CCSLogo.jpg) |
![CCS C Software and Maintenance Offers](templates/subSilver/images/forumAd6.jpg) |
View previous topic :: View next topic |
Author |
Message |
d00dajo
Joined: 20 Jul 2004 Posts: 34
|
Inserting EEprom data into the hex file |
Posted: Thu Sep 29, 2005 10:59 am |
|
|
Hi all,
Reading up in the CCS manual, it states that the #rom command can be used to insert data into the hex. Now, I know how to use the #rom to insert data into the program memory. But can I insert EEprom data as well? So that MPLAB will automatically set the eeprom locations to certain data when loading/importing the hex file. The microcontroller in question is the PIC18F4680, with 64 kBytes of ram, so the entire adress space (0x0000-0xFFFF) is used for program memory.
In the manual it states "Purpose:
Allows the insertion of data into the .HEX file. In particular, this may be used to program the '84 data EEPROM, as shown in the following example.
Note that if the #ROM address is inside the program memory space, the directive creates a segment for the data, resulting in an error if a #ORG is over the same area. The #ROM data will also be counted as used program memory space.
Examples:
#rom 0x2100={1,2,3,4,5,6,7,8}
"
Now, the example with #rom 0x2100 does not really clarify how this "eeprom insertion" should work. Im imagining that the eeprom in question in the example is something from some old 16F uC with a program memory address space of <0x2100 and the data eeprom located in adress range 0x2100->upwards. Since the 18F4680 has 64k of memory and the eeprom is not inside regular adress space, I suspect that I cannot use this function to force values into MPLAB.
Anyone who knows how to make the forced insertion?
//DJ |
|
![](templates/subSilver/images/spacer.gif) |
newguy
Joined: 24 Jun 2004 Posts: 1903
|
|
![](templates/subSilver/images/spacer.gif) |
asmallri
Joined: 12 Aug 2004 Posts: 1634 Location: Perth, Australia
|
|
Posted: Thu Sep 29, 2005 11:18 am |
|
|
Here is an example of populating the EEPROM in a PIC18F452.
Code: |
// Define the internal EEPROM offsets for the calibration coefficients
#define EEPROM 0xf00000
// define the calibration coefficients
#rom EEPROM + E_SerialNbr = {0xff}
#rom EEPROM + E_Window = {40}
#rom EEPROM + E_P0_offset = {0x0000} // offset adjustment RTD 1
|
MPLAB has no problem with this. The intel hex file format supports expended addresses via the type 4 record. _________________ Regards, Andrew
http://www.brushelectronics.com/software
Home of Ethernet, SD card and Encrypted Serial Bootloaders for PICs!! |
|
![](templates/subSilver/images/spacer.gif) |
|
|
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
|