Hi all! I am using MSP430F1121 with IAR at the moment and am wondering how one can programm the info flash of the device without having to write a programm that eats up valuable programm space. What I want to do is give the MSP some start values (wich can be changed during runtime). I have tried to initialize them in C, but it won't work. Another possibility I can think of is to create an assembler file that sets up the INFO segment. Later one is not wanted, because there are several variables from different modules in the info flash. So it would destroy the concept of modules somewhat!?! Any ideas? Thanks! -Jean- -------------------------------- http://randhahn.de
programming INFO FLASH
Started by ●September 11, 2002
Reply by ●September 11, 20022002-09-11
If I get this right, you want to declare constant values in C, to go
into
Flash INFO memory.
Have a look at the #pragma directive summary under help -> contents
-> C compiler.
This is how you would do it :
(Just an example !)
#pragma memory=constseg(INFO)
const unsigned char foo#;
const unsigned int foo_array [16]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
#pragma memoryault
The memory=constseg(INFO) directs the compiler to place consts
in the INFO segment (defined in XCL linker file)
When finished declaring, memory is set back to default.
When loading, the values will be placed in INFO Flash.
Rgds
Kris
----- Original Message -----From: jean_randhahTo: msp430@yahoogroups.comSent: Thursday, September 12, 2002 2:08 AMSubject: [msp430] programming INFO FLASHHi all!
I am using MSP430F1121 with IAR at the moment and am wondering how one can programm the info flash of the device without having to write a programm that eats up valuable programm space.
What I want to do is give the MSP some start values (wich can be
changed during runtime). I have tried to initialize them in C, but
it won't work. Another possibility I can think of is to create an
assembler file that sets up the INFO segment. Later one is not
wanted, because there are several variables from different modules in
the info flash. So it would destroy the concept of modules somewhat!?!
Any ideas?
Thanks!
-Jean-
--------------------------------
http://randhahn.de
">Yahoo! Terms of Service.
Reply by ●September 11, 20022002-09-11
Thanks Kris! I am gonna try that. Previously I had tried to use constants, but did that without declaring the info flash as a constant segment. -Jean- ---------------------------- http://randhahn.de
Reply by ●September 12, 20022002-09-12
--- In msp430@y..., "jean_randhah" <jean@r...> wrote: > Hi all! > > I am using MSP430F1121 with IAR at the moment and am wondering how one can programm the info flash of the device without having to write a programm that eats up valuable programm space. > What I want to do is give the MSP some start values (wich can be > changed during runtime). I have tried to initialize them in C, but > it won't work. Another possibility I can think of is to create an > assembler file that sets up the INFO segment. Later one is not > wanted, because there are several variables from different modules in > the info flash. So it would destroy the concept of modules somewhat!?! > > Any ideas? > > Thanks! > > -Jean- Hi Jean, If you use the AQ430 tools for MSP430Fxxx (www.quadravox.com/aq430pa.htm), you can easily declare variables in C to be put in the info memory. For example (a program that doesn't do anything useful, but illustrates the solution): file main1.c: #include <msp430x14x.h> _INFOMEM char info_segment_0[128]={1,2,3,4}; int i=3; extern int bidon(int i); int main() { i=bidon(i); return i+3; } File sub1.c: #include <msp430x14x.h> _INFOMEM char info_segment_1[128]={5,6,7,8}; int j=4; int bidon(int i) { return i+j; } When you link the program, the array info_segment0 will be placed a addres 0x1000, and the array info_segment0 at address 0x1080. Their first 4 bytes will be initialized as indicated. By using unions and structures, you can pretty much position any variable at any location in the info memory, and initialize them when you burn the program. Regards Michel > > -------------------------------- > http://randhahn.de
Reply by ●September 13, 20022002-09-13
With IAR (the same with most other compilers) there are #pragma directives. One nice directive is: #pragma memory=constseg(address) It should be ended with: #pragma memoryault In the .XCL-linker file INFO (the address of above constseg) should be set with -Z(CODE)INFO00-10FF So the linker gets to know, where INFO-FLASH is in memory. With the following code You can access the variable cInfo from within all modules, when You make it global, i.e. out of all functions, preferrably before main(). And it works with IAR. And it is initialized with "INFO". #pragma memory=constseg(INFO) char cInfo[]="INFO"; #pragma memoryault Harald -----Ursprgliche Nachricht----- Von: jean_randhah [mailto:jean@jean...] Gesendet am: Mittwoch, 11. September 2002 18:08 An: msp430@msp4... Betreff: [msp430] programming INFO FLASH Hi all! I am using MSP430F1121 with IAR at the moment and am wondering how one can programm the info flash of the device without having to write a programm that eats up valuable programm space. What I want to do is give the MSP some start values (wich can be changed during runtime). I have tried to initialize them in C, but it won't work. Another possibility I can think of is to create an assembler file that sets up the INFO segment. Later one is not wanted, because there are several variables from different modules in the info flash. So it would destroy the concept of modules somewhat!?! Any ideas? Thanks! -Jean- -------------------------------- http://randhahn.de . ">http://docs.yahoo.com/info/terms/
