网友自拍青草视频在线播放,精品久久久久久AV无码

int main(void)
{
/* USER CODE BEGIN 1 */
float temp;
uint16_t mantissa;
uint16_t fraction;
temp=(float)(84*1000000)/(9600*16);//得到USARTDIV@OVER8=0
mantissa = (uint16_t)temp; //得到整數(shù)部分
fraction = (uint16_t)((temp-mantissa)*16); //得到小數(shù)部分@OVER8=0
mantissa<<=4;
mantissa+=fraction;
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
RCC->CFGR = 0x001D040A;
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
// MX_GPIO_Init();
/* USER CODE BEGIN 2 */
//Enable and Config GPIO
RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN;//button led usart1 use this
RCC->APB2ENR |= RCC_APB2ENR_USART1EN;//usart1
//LED PA1
GPIOA->MODER |= 1<<(1*2);//輸出
GPIOA->PUPDR &= ~0x000C;//no pull
GPIOA->OSPEEDR |= 3<<(1*2);//速度 very high speed
GPIOA->OTYPER &= ~(1<<1*1);// push pull
//button PA 0
GPIOA->MODER &= ~0x0003;//輸入
GPIOA->PUPDR &= ~0x0003;//no pull
//PA9 AF7 USART1 PA10 AF7 USART1
GPIOA->AFR[1] |= 0x00000770;
//// //PA9 TX
GPIOA->MODER &= ~(0x03 << (9 * 2));//復(fù)用功能
GPIOA->MODER |= (((uint32_t)0x02) << (9 * 2));
GPIOA->OSPEEDR &= ~(3 << (9 * 2));//輸出速度 high speed
GPIOA->OSPEEDR |= ((uint32_t)(0x02) << (9 * 2));
// GPIOA->OTYPER &= ~((1) << ((uint16_t)9)) ;//輸出類型推挽
// GPIOA->OTYPER |= (uint16_t)(((uint16_t)0x00) << ((uint16_t)9));
GPIOA->PUPDR &= ~( ((uint32_t)0x00000003) << ((uint16_t)9 * 2));//無(wú)上下拉
// GPIOA->PUPDR |= (((uint32_t)0x01) << (9 * 2));
// PA10 RX
GPIOA->MODER &= ~(0x03 << (10 * 2));//復(fù)用功能
GPIOA->MODER |= (((uint32_t)0x02) << (10 * 2));
GPIOA->OSPEEDR &= ~(3 << (10 * 2));
GPIOA->OSPEEDR |= ((uint32_t)(0x02) << (10 * 2));
// GPIOA->OTYPER &= ~((1) << ((uint16_t)10)) ;//輸出類型推挽
// GPIOA->OTYPER |= (uint16_t)(((uint16_t)0x00) << ((uint16_t)10));
GPIOA->PUPDR &= ~( ((uint32_t)0x00000003) << ((uint16_t)10 * 2));//無(wú)上下拉
// GPIOA->PUPDR |= (((uint32_t)0x01) << (10 * 2));
USART1->CR1&=~(1<<15); //設(shè)置OVER8=0
USART1->BRR=mantissa;
//默認(rèn)是1 start 8 wordlength 1stopbit
USART1->CR1|=1<<3; //串口發(fā)送使能
USART1->CR1|=1<<2; //串口接收使能
USART1->CR1|=1<<5; //接收緩沖區(qū)非空中斷使能
//// USART1->CR1|=1<<7; //發(fā)送緩沖區(qū)非空中斷使能
HAL_NVIC_SetPriority(USART1_IRQn, 1, 1);
NVIC_EnableIRQ(USART1_IRQn);
USART1->CR1|=1<<13;//開啟串口
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
// USART1->DR = 0x41;
// while((USART1->SR&0X80)==0);//等待發(fā)送結(jié)束
if (( GPIOA->IDR & 0x0001))//按下按鍵，開啟TXE中斷，準(zhǔn)備發(fā)送
{
USART1->CR1|=1<<7; //發(fā)送緩沖區(qū)非空中斷使能
// USART1->DR = 0x0;//發(fā)送無(wú)用字節(jié)觸發(fā)txe中斷
}
GPIOA->ODR |= (unsigned int)0x0002;
delay(999999);
GPIOA->ODR &= ~(unsigned int)0x0002;
delay(999999);
}
/* USER CODE END 3 */
}

復(fù)制代碼