Problem using FLASH002-App

[#1]

Hallo,

I'm trying to erase flash memory by using FASH002-App, but I get a sequence error SQER on a XMC4500 MCU. It seems that the compiler optimizes away the first line in "Flash002_EraseSector" as the same adress is accessed twice:

 /* Clear the flash status register */
      M32(FLASH002_UNCACHED_BASE + 0x5554U)=0x000000F5U;
      /* Erase sequence */
      M32(FLASH002_UNCACHED_BASE + 0x5554U)=0x000000AAU;
      M32(FLASH002_UNCACHED_BASE + 0xAAA8U)=0x00000055U;
      M32(FLASH002_UNCACHED_BASE + 0x5554U)=0x00000080U;
      M32(FLASH002_UNCACHED_BASE + 0x5554U)=0x000000AAU;
      M32(FLASH002_UNCACHED_BASE + 0xAAA8U)=0x00000055U;
      M32(Address)=0x00000030U;

Using a volatile in M32 macro helps. But of course, this change is lost if I run the code generator again. How can I use the function without a SQER?

Thanks

[Travis]

endres wrote:
Hallo,

I'm trying to erase flash memory by using FASH002-App, but I get a sequence error SQER on a XMC4500 MCU. It seems that the compiler optimizes away the first line in "Flash002_EraseSector" as the same adress is accessed twice:

Using a volatile in M32 macro helps. But of course, this change is lost if I run the code generator again. How can I use the function without a SQER?

Thanks

Can you please use the "Flash002_EraseSector"?

 #include 
  int main(void)
  {
    uint32_t status;
    uint32_t StartAddr = FLASH002_SECTOR7_BASE;
    // Initialize
    DAVE_Init(); // FLASH002_Init() will be called within DAVE_Init()
    status = Flash002_EraseSector(StartAddr);
    while(1)
    {
    }
  }

[#3]

Hi,

I'm using "Flash002_EraseSector". The code is extracted out of this function. I forgot to mention that. I also tried this example before. Same problem there. Stepping over the last line "M32(Address)=0x00000030U;" rises a SQER-error.