Hi Wolfgang,
A few things...
Have you set FCTL2 correctly? ie what frequency is the FLASH clock?
Also, and I don't remember the FLASH register bits here, as I wrote this
stuff once and it's just worked ever since.
Wouldn't you want it to ERASE the segment before re-writing it?
When erasing the segment, you'd generally want the data to be erased in
a different segment than possible code, so just having it as a const
might not ensure this. Would pay to check I believe.
My non-volatile data has generally been stored in the infomem section,
so I just erase those sectors.
Regards,
Bevan
Hi,
I tried to write some data into FLASH memory. I used the following
code example:
const uint16_t test_var = 5;
int main()
{
.
.
.
FCTL3 = FWKEY; // Unlock the flash.
FCTL1 = FWKEY | WRT; // Enable flash write.
test_var56++; // Write the data to the flash.
do {
_NOP();
} while(FCTL3 & BUSY);
FCTL1 = FWKEY; // Disable flash write.
FCTL3 = FWKEY | LOCK; // Lock the flash.*/
.
.
.
}
However, it does not work. The value of "test_var" after the first run
is always "4". A second reset does not change value at all.
It seems that only the least significant bit is written to the flash.
Any ideas?
Thanks a lot.
Greetings,
Wolfgang
