Posted on August 06, 2014 at 09:15Hi,
I am trying to reset the Time and Date (TR/DR) registers in STM32F2xx using a logic as below:
reset_func()
{
// Disable write protection
// Enter init mode
RTC->TR = 0; // Reset TR
// Exit init mode
// Wait for synchroniation
// Enable write protection
}
It turns out sometimes a call to this reset_function returns without the TR being actually reset. Now if I run this function in a loop until the TR is actually reset, I can get it working.
However when I add the loop inside the function like this:
reset_func()
{
unsigned int register;
// Disable write protection
// Enter init mode
RTC->TR = 0;
// While not reset, loop
do {
register = RTC->TR;
}
while (register != 0); // Reset TR
// Exit init mode
// Wait for synchroniation
// Enable write protection
}
the system gets stuck.
Is there anything that prevents us from looping a read inside init mode and with write protection disabled?
