Can't write on Peripherals memory of nRF51822 using gcc emIDE or Em::Blocks

[Marcio Segura]

I am struggling to figure out why I can't write on the Peripherals memory to set a function. In this case I am trying to write in the 0x4000250C which is UART0, PSELTXD (Pin select for TXD), but it doesn't change the memory value using gcc on emIDE and Em::Blocks but using Keil it writes (I can write normally in RAM region using every IDE). The assembler code looks equivalent. I think I may be forgetting some compile parameter or it needs a special command to write or whatever. Attached are the pictures and the source code for emIDE if someone can help.

UART_2.zip

[Marcio Segura]

Does the nRF51822 structure is equivalent to some other microcontroller?

[Marcio Segura]

Am I missing some "permission command" to access "Peripheral memory" in the code or configuration or Segger debugger program?

[Marcio Segura]

I think it is related to the debugger, because I just tested with another set of hardware and it worked. The strange thing is that this hardware set works in Keil but not with gcc. Maybe some command to j-link in "GDB commands before connection" or "GDB commands after connection" solve the proplem. I am using nothing in the "GDB commands before connection" and "monitor reset" and "load" in the "GDB commands after connection".