· Thank you for your help and I checked the code of your example.
I think, I don't understand yet. T.T
I have a global variable, 'Offset'. This variable is modified at once( when
the main application is start) by auto calibration function.
So, The auto calibration function will find the 'Offset' value, then I need
to save this value in flash address.
And then, after the value save in flash address, I will use this
value(Offset) on the main application's operation without the auto
calibration after Power Reset.
Therefore, I made the flash routine, but there're bus error.
So, I used #pragma to configure the variable direct in flash address.
This way has a problem the only constant value can save in flash.
#pragma push
#pragma section all_types ".__my_Flash" ".__my_Flash"
static const vuint32_t WVar=0xAAAAAAAA;
#pragma pop
I want make operation like 'WVar=Offset'.
void Program_FLASH(void)
{
#define FLASH_HLR_PASSWORD 0xB2B22222
/* enable high address space */
FLASH.HLR.R = FLASH_HLR_PASSWORD; // unlock register
FLASH.HLR.B.HBLOCK = 0x00000000; // unlock all high blocks
/* step1. erase H1 (0xC0000-0xFFFFF) */
FLASH.MCR.B.ERS = 1;
FLASH.HSR.B.HBSEL = 0x00000001; // select H1 block
((unsigned int) p_test) = 0xFFFFFFFF; // interlock write
FLASH.MCR.B.EHV = 1; // start the erase operation
while(FLASH.MCR.B.DONE == 0){}; // wait for DONE
FLASH.MCR.B.EHV = 0;
FLASH.MCR.B.ERS = 0;
/* step2. program data */
FLASH.MCR.B.PGM = 1;
((unsigned int)p_test) = Offset; //Is this valid?? This is my main
question
// ((unsigned int) p_test++) = data_to_be_written[0]; // first write
// ((unsigned int) p_test++) = data_to_be_written[1]; // additional
write
// ((unsigned int) p_test++) = data_to_be_written[2]; // additional
write
// ((unsigned int) p_test) = data_to_be_written[3]; // additional
write
FLASH.MCR.B.EHV = 1; //start the erase
operation
while(FLASH.MCR.B.DONE == 0){}; //wait for DONE
FLASH.MCR.B.EHV = 0;
FLASH.MCR.B.PGM = 0;
}
What I miss? T.T
Flash permission only constant like 0x0001?
I hope your help, please and thank you.
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