Original question:
Tool/software:
Hi experts,
I need to use some storage from flash memory, ~126 KB to 127 KB (1KB), to store my data (calibration values, customer data, etc.). Still, I cannot configure that. Could you please help me with this?
Thanks for your help.
Yes. I did it. Now I do not know my driver_linker.cmd is correct or not? I have separated 1KB from the original flash. Still, I am in a testing period. I need to write some data into the desired address in my FLASH2. Then, I need to ensure that data must be available when changing the code. I mean this data should be permanent until I erase it.
-uinterruptVectors
--stack_size=512
MEMORY
{
FLASH (RX) : origin = 0x00000000, length = 0x0001FC00 /* 127KB for app */
FLASH2 (RX) : origin = 0x0001FC00, length = 0x00000400 /* 1KB for BSL */
SRAM (RWX) : origin = 0x20000000, length = 0x00001000
BCR_CONFIG (R) : origin = 0x41C00000, length = 0x00000080
BSL_CONFIG (R) : origin = 0x41C00100, length = 0x00000080
}
SECTIONS
{
.intvecs : > 0x00000000
.text : palign(8) {} > FLASH
.const : palign(8) {} > FLASH
.cinit : palign(8) {} > FLASH
.pinit : palign(8) {} > FLASH
.rodata : palign(8) {} > FLASH
.ARM.exidx : palign(8) {} > FLASH
.init_array : palign(8) {} > FLASH
.binit : palign(8) {} > FLASH
.TI.ramfunc : load = FLASH, palign(8), run=SRAM, table(BINIT)
.user_data : {} > FLASH2
.vtable : > SRAM
.args : > SRAM
.data : > SRAM
.bss : > SRAM
.sysmem : > SRAM
.stack : > SRAM (HIGH)
.BCRConfig : {} > BCR_CONFIG
.BSLConfig : {} > BSL_CONFIG
}
First, I unselect the diver_linker.cmd generation option and edit the .cmd file. After that, I re-select that option. Then the driver_linker.cmd survived.
This is my .c code.
#include "ti_msp_dl_config.h"
// Define 4 sector-aligned flash addresses (must match flash sector boundaries, e.g. 1KB-aligned)
#define USER_FLASH_BASE_1 0x0001F000
#define USER_FLASH_BASE_2 0x0001F400
#define USER_FLASH_BASE_3 0x0001F800
#define USER_FLASH_BASE_4 0x0001FC00
// Data blocks to write (2 x 32-bit = 64-bit each block)
uint32_t userData[4][2] = {
{0xAAAA1111, 0xBBBB2222}, // Data for address 1
{0xCCCC3333, 0xDDDD4444}, // Data for address 2
{0xEEEE5555, 0xFFFF6666}, // Data for address 3
{0x12345678, 0x9ABCDEF0} // Data for address 4
};
// Corresponding flash addresses for each data block
uint32_t flashAddresses[4] = {
USER_FLASH_BASE_1,
USER_FLASH_BASE_2,
USER_FLASH_BASE_3,
USER_FLASH_BASE_4
};
// Flash write function for each 64-bit data block
void write_flash_block(uint32_t address, uint32_t *data)
{
// Unprotect sector
DL_FlashCTL_unprotectSector(FLASHCTL, address, DL_FLASHCTL_REGION_SELECT_MAIN);
// Erase sector before writing
DL_FLASHCTL_COMMAND_STATUS status;
status = DL_FlashCTL_eraseMemoryFromRAM(FLASHCTL, address, DL_FLASHCTL_COMMAND_SIZE_SECTOR);
if (status != DL_FLASHCTL_COMMAND_STATUS_PASSED) {
while (1); // Erase failed
}
// Program 64-bit (2 x 32-bit) word with ECC auto-generated
status = DL_FlashCTL_programMemoryBlockingFromRAM64WithECCGenerated(
FLASHCTL,
address,
data,
2,
DL_FLASHCTL_REGION_SELECT_MAIN
);
if (status != DL_FLASHCTL_COMMAND_STATUS_PASSED) {
while (1); // Write failed
}
}
int main(void)
{
SYSCFG_DL_init();
// Write each data block to corresponding flash sector
for (int i = 0; i < 4; i++) {
write_flash_block(flashAddresses[i], userData[i]);
}
// Toggle LED to show success
while (1) {
DL_GPIO_togglePins(GPIO_LEDS_PORT, GPIO_LEDS_USER_LED_1_PIN);
delay_cycles(16000000);
}
}
Then I check the address through debugging, 
The data values are present, but when I flash new code, they are no longer there. All erased.
Am I wrong? Can you help me do this the right way?
At the final, I need to save some configuration on flash permanently. Still, I am testing at ground level.
Really appreciate your assistance.
Thank you.