Posted on April 28, 2015 at 11:30Hi All:
I'm a newbie for the MCU programming.
So far, I use SWD protocol to program STM32L151C6 chip with RDP level 1.
I want to remove RDP level 1, program, and change level 0 to level 1.
However, I follow the unlock steps of RM0038 reference manual to unlock the flash.
First, I unlock the PECR register and option byte block.
then I write the '0xFF5500AA' value into the address of flash 0x1FF80000 for setting RDP level 0, and write the '0xFF870078' value into the address 0x1FF80004 for set USE default values.
Then, I unprotect the flash by writing 0xFFFF0000 into the address of option block from 0x1FF80008 to 0x1FF8001C
After performing above steps, I find that the flash's FLASH_OBR doesn't show the RDP level 0 bits, 0x00F000AA.
How can I to enable the RDP level 0 immedately after changing RDP level ?
Regards ~
