uint8_t TM_GENERAL_DWTCounterEnable(void) {
uint32_t c;
/* Set clock speed if not already */
if (GENERAL_SystemSpeedInMHz == 0) {
/* Get clock speed in MHz */
GENERAL_SystemSpeedInMHz = TM_GENERAL_GetClockSpeed(TM_GENERAL_Clock_SYSCLK) / 1000000;
}
/* Enable TRC */
CoreDebug->DEMCR &= ~0x01000000;
CoreDebug->DEMCR |= 0x01000000;
/* Enable counter */
DWT->CTRL &= ~0x00000001;
DWT->CTRL |= 0x00000001;
/* Reset counter */
DWT->CYCCNT = 0;
/* Check if DWT has started */
c = DWT->CYCCNT;
/* 2 dummys */
__ASM volatile ("NOP");
__ASM volatile ("NOP");
/* Return difference, if result is zero, DWT has not started */
return (DWT->CYCCNT - c);
}
int main(void) {
/* Init system clock for maximum system speed */
TM_RCC_InitSystem();
/* Init HAL layer */
HAL_Init();
/* Initialize delay */
TM_DELAY_Init();
/* Initialize leds on board */
TM_DISCO_LedInit();
/* Init button */
TM_DISCO_ButtonInit();
/* Init USART6, TX: PC6, 921600 baud */
TM_USART_Init(USART6, TM_USART_PinsPack_1, 921600);
/* Get system reset source and clear flags after read */
printf("System reset source: %d\n", (uint8_t)TM_GENERAL_GetResetSource(1));
/* Get system reset source and clear flags after read */
/* You should see number which corresponds to "None", because we cleared flags in statement above */
printf("System reset source: %d\n", (uint8_t)TM_GENERAL_GetResetSource(1));
/* Get system core and PCLK1 (Peripheral Clock 1, APB1) clocks */
printf("System core clock: %u Hz; PCLK1 clock: %u Hz\n",
TM_GENERAL_GetClockSpeed(TM_GENERAL_Clock_SYSCLK),
TM_GENERAL_GetClockSpeed(TM_GENERAL_Clock_PCLK1)
);
while (1) {
/* If button pressed */
if (TM_DISCO_ButtonOnPressed()) {
/* Send to USER */
printf("Software reset will happen in a moment\n");
/* Wait a little */
Delayms(500);
/* Perform system software reset */
TM_GENERAL_SystemReset();
}
}
}
