I am trying to implement a couple of C functions to erase an information
segment on the MSP430F148 and then write selected words to memory, using
the assembly example in the user manual as a guide. The system is
resetting, and I am not sure where it is happening. I would appreciate
any guidance you can give.
The MCLK, set to 2 MHZ, is selected for the flash clock source, divided by
5 to give ~400 KHz clock. EE is defined as a pointer to defined structure
at location 0x1000 [ EE = (ESeg_Type *) 0x1000 ].
function to erase one information segment_n.
...
_DINT( );
WDTCTL = 0x5A80; // WR_WD | HOLDWD;
FCTL2 = 0xA544; // (FLWRITE | CLOCKFLASH);
FCTL3 = 0xA500; // FLWRITE; // clear lock bit
FCTL1 = 0xA502; // (FLWRITE | ERASESEG);
EE->SEG[segment_n].SegWords[1] = CLEAR_SEG_CODE; /* dummy write */
/* CPU activities are suspended until the erasure is complete since
erasure was called from flash-resident program */
FCTL3 = 0xA510; // (FLWRITE | LOCKBIT);
WDTCTL = 0x5A0C; // WR_WD | RESETWD | WD_USES_ACLK_FULL;
_EINT();
...
function to store a word of information into segment_n at index position
provided.
...
_DINT( );
WDTCTL = 0x5A80; // WR_WD | HOLDWD;
FCTL2 = 0xA544; // (FLWRITE | CLOCKFLASH);
FCTL3 = 0xA500; // FLWRITE; /* clear lock bit
*/
FCTL1 = 0xA502; // (FLWRITE | WRTBIT);
EE->SEG[segment_n].SegWords[index] = wordvalue;
/* CPU activities are suspended until the store to flash is complete
*/
FCTL1 = 0xA500; // FLWRITE; /* clear the write
bit */
FCTL3 = 0xA510; // (FLWRITE | LOCKBIT);
WDTCTL = 0x5A0C; // WR_WD | RESETWD | WD_USES_ACLK_FULL;
_EINT();
...
-- JoAnne Powers
No trees were harmed in the transmission of this message;
however, a large number of electrons were temporarily inconvenienced.
They who will give up essential liberty to obtain temporary safety deserve
neither liberty nor safety. -- Benjamin Franklin
Erase and write to info seg of flash from flash resident program
Started by ●April 26, 2003
Reply by ●April 26, 20032003-04-26
Sounds like a watchdog problem, unless of course your program is loaded at address 0x1000? --- In msp430@msp4..., JoAnne.Powers@i... wrote: > I am trying to implement a couple of C functions to erase an information > segment on the MSP430F148 and then write selected words to memory, using > the assembly example in the user manual as a guide. The system is > resetting, and I am not sure where it is happening. I would appreciate > any guidance you can give. > > > The MCLK, set to 2 MHZ, is selected for the flash clock source, divided by > 5 to give ~400 KHz clock. EE is defined as a pointer to defined structure > at location 0x1000 [ EE = (ESeg_Type *) 0x1000 ]. > > function to erase one information segment_n. > ... > _DINT( ); > WDTCTL = 0x5A80; // WR_WD | HOLDWD; > > FCTL2 = 0xA544; // (FLWRITE | CLOCKFLASH); > FCTL3 = 0xA500; // FLWRITE; // clear lock bit > FCTL1 = 0xA502; // (FLWRITE | ERASESEG); > > EE->SEG[segment_n].SegWords[1] = CLEAR_SEG_CODE; /* dummy write */ > > /* CPU activities are suspended until the erasure is complete since > erasure was called from flash-resident program */ > > FCTL3 = 0xA510; // (FLWRITE | LOCKBIT); > > > WDTCTL = 0x5A0C; // WR_WD | RESETWD | WD_USES_ACLK_FULL; > > _EINT(); > ... > > > function to store a word of information into segment_n at index position > provided. > ... > _DINT( ); > WDTCTL = 0x5A80; // WR_WD | HOLDWD; > > FCTL2 = 0xA544; // (FLWRITE | CLOCKFLASH); > FCTL3 = 0xA500; // FLWRITE; /* clear lock bit > */ > FCTL1 = 0xA502; // (FLWRITE | WRTBIT); > > EE->SEG[segment_n].SegWords[index] = wordvalue; > > /* CPU activities are suspended until the store to flash is complete > */ > > FCTL1 = 0xA500; // FLWRITE; /* clear the write > bit */ > FCTL3 = 0xA510; // (FLWRITE | LOCKBIT); > > WDTCTL = 0x5A0C; // WR_WD | RESETWD | WD_USES_ACLK_FULL; > > _EINT(); > ... > > > -- JoAnne Powers > No trees were harmed in the transmission of this message; > however, a large number of electrons were temporarily inconvenienced. > > They who will give up essential liberty to obtain temporary safety deserve > neither liberty nor safety. -- Benjamin Franklin > >
Reply by ●April 26, 20032003-04-26
It can't be the watchdog, because I get the same result if I comment
out
the reset of the watchdog (leave it off after I enter the program).
Thanks for your reply, though.
-- JoAnne Powers
No trees were harmed in the transmission of this message;
however, a large number of electrons were temporarily inconvenienced.
They who will give up essential liberty to obtain temporary safety deserve
neither liberty nor safety. -- Benjamin Franklin
"michelqv" <michel@mich...>
04/26/2003 01:59 PM
Please respond to msp430
To: msp430@msp4...
cc:
Subject: [msp430] Re: Erase and write to info seg of flash from
flash resident
program
Sounds like a watchdog problem, unless of course your program is
loaded at address 0x1000?
--- In msp430@msp4..., JoAnne.Powers@i... wrote:
> I am trying to implement a couple of C functions
to erase an
information
> segment on the MSP430F148 and then write selected
words to memory,
using
> the assembly example in the user manual as a
guide. The system is
> resetting, and I am not sure where it is happening. I would
appreciate
> any guidance you can give.
>
>
> The MCLK, set to 2 MHZ, is selected for the flash clock source,
divided by
> 5 to give ~400 KHz clock. EE is defined as a
pointer to defined
structure
> at location 0x1000 [ EE = (ESeg_Type
*) 0x1000 ].
>
> function to erase one information segment_n.
> ...
> _DINT( );
> WDTCTL = 0x5A80; // WR_WD | HOLDWD;
>
> FCTL2 = 0xA544; // (FLWRITE |
CLOCKFLASH);
> FCTL3 = 0xA500; //
FLWRITE; // clear
lock bit
> FCTL1 = 0xA502; //
(FLWRITE | ERASESEG);
>
> EE->SEG[segment_n].SegWords[1] = CLEAR_SEG_CODE; /* dummy
write */
>
> /* CPU activities are suspended until the erasure is complete
since
> erasure was called from flash-resident program */
>
> FCTL3 = 0xA510; // (FLWRITE | LOCKBIT);
>
>
> WDTCTL = 0x5A0C; // WR_WD | RESETWD | WD_USES_ACLK_FULL;
>
> _EINT();
> ...
>
>
> function to store a word of information into segment_n at index
position
> provided.
> ...
> _DINT( );
> WDTCTL = 0x5A80; // WR_WD | HOLDWD;
>
> FCTL2 = 0xA544; // (FLWRITE |
CLOCKFLASH);
> FCTL3 = 0xA500; //
FLWRITE; /* clear
lock bit
> */
> FCTL1 = 0xA502; // (FLWRITE | WRTBIT);
>
> EE->SEG[segment_n].SegWords[index] = wordvalue;
>
> /* CPU activities are suspended until the store to flash is
complete
> */
>
> FCTL1 = 0xA500; // FLWRITE; /* clear
the write
> bit */
> FCTL3 = 0xA510; // (FLWRITE | LOCKBIT);
>
> WDTCTL = 0x5A0C; // WR_WD | RESETWD | WD_USES_ACLK_FULL;
>
> _EINT();
> ...
>
>
> -- JoAnne Powers
> No trees were harmed in the transmission of this message;
> however, a large number of electrons were temporarily
inconvenienced.
>
> They who will give up essential liberty to obtain temporary safety
deserve
> neither liberty nor safety. -- Benjamin Franklin
>
>
.
">http://docs.yahoo.com/info/terms/
Reply by ●April 28, 20032003-04-28
I have written some general purpose flash routines in C and just uploaded them to the file area (flash_c_msp430). You might want to look at them or use them as they are. -Jean- ---------------------- Can spy? CANeye! http://randhahn.de
