HAL_FLASH_Program does not support programming bank 2

[dcooperch]

When trying to program the STM32L4P5RE, I get an assertion failure when trying to program the second bank like this:

HAL_FLASH_Program(FLASH_TYPEPROGRAM_DOUBLEWORD, address, data)

This call fails if my address is in the second bank `0x08080000`.  Looking at the source code, I get an assertion failure here: 

static void FLASH_Program_DoubleWord(uint32_t Address, uint64_t Data)
{
  /* Check the parameters */
  assert_param(IS_FLASH_PROGRAM_ADDRESS(Address));  <---- HERE

I understand when DBANK (Or DB1M) is set, we cannot read the other bank.  So how are we supposed to actually program it?

[TDK · Accepted solution]

The chip has 512 kB of flash, so 0x08080000 is outside of those bounds, regardless of how DB1M is set.

Second bank of flash starts at 0x08040000.

[dcooperch]

Wow, I can't believe I missed that.  I've been relying on the value of the linker script from STM32CubeMX: 

FLASH (rx)      : ORIGIN = 0x8000000, LENGTH = 1024K <----

But now I realize that linker script is generic: `STM32L4P5XX_FLASH.ld`.  That was a little misleading.  Thank you for the help!