Posted on January 10, 2006 at 09:36Hallo,
I programmed an application using STR710F. On my board I use internal and external flash. I started it 2 weeks ago. When I came back the system has stopped.
I debuged my application and has the following behaviour:
The program runs with my emulator.
The program runs in externla flash.
The program doesn't run in internal flash.
I made some tests and found out, that the program runs in internal flash only when the CPU speed (RCLK) is less than 18MHZ.
I initialize the clock as followesn (oscillator frequenc is 14,7456MHz):
case en44_2368:
RCCU_Div2Config (ENABLE);
RCCU_RCLKSourceConfig(RCCU_CLOCK2 );
RCCU_PLL1Config(RCCU_PLL1_Mul_12, RCCU_Div_2);
while (RCCU_FlagStatus(RCCU_PLL1_LOCK) == RESET);
RCCU_RCLKSourceConfig(RCCU_PLL1_Output);
The system runs until the line RCCU_RCLKSourceConfig(RCCU_PLL1_Output); Than it stops. When I link these functions into external flash the system runs until next function in internal flash is called.
However when I use an RCLK < 17MHz the system runs in internal flash. And it runs when I started my application two weeks ago with RCLK=44Mhz.
By the way. I can program the internal flash within using my own bootloader (bootloader is executes in external flash) without any problems.
Has anyone an idea why I can't execute the application in internal flash with RCLK = 44MHz?
