int main(void)
{
uint32_t stop_time;
uint32_t start_time;
RCC_ClocksTypeDef RCC_Clocks;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);
systick_millis_init();
UART_Init();
timer7_us_init();
delay_us_init();
//LEDS
gpio_pinSetup(GPIOC, GPIO_Pin_8, GPIO_Mode_OUT, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_Speed_40MHz);
GPIO_WriteBit(GPIOC, GPIO_Pin_8, Bit_SET);
//CLOCK OUTPUT PA8
gpio_pinSetup_AF(GPIOA, GPIO_Pin_8, GPIO_AF_MCO, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_Speed_40MHz);
RCC_MCOConfig(RCC_MCOSource_SYSCLK, RCC_MCODiv_1);
printLn();
printStringLn("------------------------------------------------");
printStringLn("System initialized.");
RCC_GetClocksFreq(&RCC_Clocks);
printString("SYSCLK_Frequency: ");
printNumberLn(RCC_Clocks.SYSCLK_Frequency, DEC);
printString("HCLK_Frequency: ");
printNumberLn(RCC_Clocks.HCLK_Frequency, DEC);
printString("PCLK1_Frequency: ");
printNumberLn(RCC_Clocks.PCLK1_Frequency, DEC);
printString("PCLK2_Frequency: ");
printNumberLn(RCC_Clocks.PCLK2_Frequency, DEC);
printString("SYSCLKSource: ");
printNumberLn(RCC_GetSYSCLKSource(), DEC);
printString("PRESCALER TIM2: ");
printNumberLn(TIM_GetPrescaler(TIM3), DEC);
printStringLn("------------------------------------------------");
while (1)
{
GPIO_ToggleBits(GPIOC, GPIO_Pin_8);
TIM_SetCounter(TIM7, 0);
TIM_Cmd(TIM7, ENABLE);
start_time = TIM_GetCounter(TIM7);
delay_us(25);
stop_time = TIM_GetCounter(TIM7);
TIM_Cmd(TIM7, DISABLE);
printNumberLn(stop_time - start_time, DEC);
delay(100);
printNumberLn(millis(), DEC);
}
}
static u32 timer_get_clock( unsigned id )
{
TIM_TypeDef* ptimer = timer[ id ];
return TIM_GET_BASE_CLK( id ) / ( TIM_GetPrescaler( ptimer ) + 1 );
}
// returns configured timer prescaler value for given port
// should be zero if timer is not used
uint16_t pwmCheckTimer(uint8_t pwmPort) {
return TIM_GetPrescaler((TIM_TypeDef *) pwmTimers[pwmPort]);
}
