/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/* Initialize four LEDs mounted on GD32107C-EVAL board */
LED_Init();
/* Enable PWR and BKP clock */
RCC_APB1PeriphClock_Enable(RCC_APB1PERIPH_PWR | RCC_APB1PERIPH_BKP, ENABLE);
/* Enable write access to the registers in Backup domain */
PWR_BackupAccess_Enable(ENABLE);
/* Clear the bit flag of Tamper Event */
BKP_ClearBitState();
/* Check if the POR/PDR reset flag is set */
if(RCC_GetBitState(RCC_FLAG_POPDRST) != RESET)
{
/* Clear the RCC all reset flags */
RCC_ClearBitState();
/* Turn on LED4 */
GPIO_SetBits(GPIOE, GPIO_PIN_0);
/* Check if Backup data registers has been written */
if(CheckBackupReg(0x1226) == 0x00)
{
/* Backup data registers values are correct */
/* Turn on LED2 */
GPIO_SetBits(GPIOC, GPIO_PIN_0);
}
else
{
/* Backup data registers values are not correct or they are not
written*/
/* Write data to Backup data registers */
WriteToBackupReg(0x1226);
/* Turn on LED3 */
GPIO_SetBits(GPIOC, GPIO_PIN_2);
}
}
/* Turn on LED5 */
GPIO_SetBits(GPIOE, GPIO_PIN_1);
while (1)
{
}
}
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/* Configure the USART peripheral ----------------------------------------*/
USART_InitStructure.USART_BRR = 115200;
USART_InitStructure.USART_WL = USART_WL_8B;
USART_InitStructure.USART_STBits = USART_STBITS_1;
USART_InitStructure.USART_Parity = USART_PARITY_RESET;
USART_InitStructure.USART_HardwareFlowControl = USART_HARDWAREFLOWCONTROL_NONE ;
USART_InitStructure.USART_RxorTx = USART_RXORTX_RX | USART_RXORTX_TX;
GD_EVAL_COMInit(&USART_InitStructure);
printf("\n\r *********************** RTC Calendar Demo ***********************\n\r");
/* Check if RTC has aready been configured */
if (RTC->BKP0R != BKP_VALUE)
{
RTC_PreConfiguration();
RTC_Setup();
}
else
{
/* Detect the reset source */
if (RCC_GetBitState(RCC_FLAG_POPDRST) != RESET)
{
printf("\r\n Power On Reset Occurred....\n\r");
}
else if (RCC_GetBitState(RCC_FLAG_EPRST) != RESET)
{
printf("\r\n External Reset Occurred....\n\r");
}
printf("\n\r No Need To Configure RTC....\n\r");
#ifdef RTC_CLOCK_SOURCE_LSI
RCC_LSI_Enable(ENABLE);
#endif
RTC_WaitRSF_ToSetAgain();
RTC_ClearBitState(RTC_STR_AF);
EXTI_ClearIntBitState(EXTI_LINE17);
RTC_ShowTime();
RTC_ShowAlarm();
}
RCC_ClearBitState();
/* LED1 GPIO Initialization */
RCC_AHBPeriphClock_Enable(LED1_GPIO_CLK, ENABLE);
GPIO_InitStructure.GPIO_Pin = LED1_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_MODE_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OTYPE_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PUPD_NOPULL;
GPIO_InitStructure.GPIO_Speed = GPIO_SPEED_50MHZ;
GPIO_Init(LED1_GPIO_PORT, &GPIO_InitStructure);
LED1_GPIO_PORT->BOR = LED1_PIN;
/* LED2 GPIO Initialization */
RCC_AHBPeriphClock_Enable(LED2_GPIO_CLK, ENABLE);
GPIO_InitStructure.GPIO_Pin = LED2_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_MODE_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OTYPE_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PUPD_NOPULL;
GPIO_InitStructure.GPIO_Speed = GPIO_SPEED_50MHZ;
GPIO_Init(LED2_GPIO_PORT, &GPIO_InitStructure);
LED2_GPIO_PORT->BOR = LED2_PIN;
/* RTC ALARM Interrupt Configuration */
EXTI_ClearIntBitState(EXTI_LINE17);
EXTI_InitStructure.EXTI_LINE = EXTI_LINE17;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LINEEnable = ENABLE;
EXTI_Init(&EXTI_InitStructure);
NVIC_InitStructure.NVIC_IRQ = RTC_IRQn;
NVIC_InitStructure.NVIC_IRQPreemptPriority = 0;
NVIC_InitStructure.NVIC_IRQSubPriority = 0;
NVIC_InitStructure.NVIC_IRQEnable = ENABLE;
NVIC_Init(&NVIC_InitStructure);
while (1)
{
}
}
