Posted on September 23, 2011 at 11:35Hello again,
This time with a problem in setting the times.
I have a simple application that after the main call the SystemInit() function which set all the timers. This function is inside the system_stm32f10x.c file. Look at the code inside, I see:
#define SYSCLK_FREQ_72MHz 72000000
#elif defined SYSCLK_FREQ_72MHz
const uint32_t SystemFrequency = SYSCLK_FREQ_72MHz; /*!< System Clock Frequency (Core Clock) */
const uint32_t SystemFrequency_SysClk = SYSCLK_FREQ_72MHz; /*!< System clock */
const uint32_t SystemFrequency_AHBClk = SYSCLK_FREQ_72MHz; /*!< AHB System bus speed */
const uint32_t SystemFrequency_APB1Clk = (SYSCLK_FREQ_72MHz/2); /*!< APB Peripheral bus 1 (low) speed */
const uint32_t SystemFrequency_APB2Clk = SYSCLK_FREQ_72MHz; /*!< APB Peripheral bus 2 (high) speed */
and finally, the call to the SetSysClockTo72() function at the bottom of the file. In summary, after calling this function, the system clock should be set to 72MHz.
If I call RCC_GetClocksFreq(&RCC_Clocks) just after callingSystemInit() and I use the debugger, I can see this numbers:
SYSCLK_Frequency=4182367265
HCLK_Frequency=2124520693
PCLK1_Frequency=1051260827
The question is: shouldn't I see SYSCLK_Frequency equal to 72000000 or similar? and why these numbers in term s of billions and millions, as maximum 72?
thanks for any help.
