关于战舰版的ATK-HC05蓝牙串口模块实验

烧年 · 发表于 2013-11-9 12:32:20

void USART2_Init(u32 pclk1,u32 bound)
{
RCC->APB2ENR|=1<<8;   //使能PORTG口时钟
  GPIOG->CRH&=0XFFFFFF0F; //IO状态设置
GPIOG->CRH|=0X00000030; //IO状态设置
RCC->APB2ENR|=1<<2;   //使能PORTA口时钟
GPIOA->CRL&=0XFFFF00FF; //IO状态设置
GPIOA->CRL|=0X00008B00; //IO状态设置
RCC->APB1ENR|=1<<17; //使能串口时钟
RCC->APB1RSTR|=1<<17;   //复位串口2
RCC->APB1RSTR&=~(1<<17);//停止复位
//波特率设置
  USART2->BRR=(pclk1*1000000)/(bound);// 波特率设置
USART2->CR1|=0X200C; //1位停止,无校验位.
USART2->CR3=1<<7;   //使能串口2的DMA发送
UART_DMA_Config(DMA1_Channel7,(u32)&USART2->DR,(u32)USART2_TX_BUF);//DMA1通道7,外设为串口2,存储器为USART2_TX_BUF
#ifdef USART2_RX_EN    //如果使能了接收
//使能接收中断
USART2->CR1|=1<<8;    //PE中断使能
USART2->CR1|=1<<5;    //接收缓冲区非空中断使能
MY_NVIC_Init(2,3,USART2_IRQChannel,2);//组2，最低优先级
TIM4_Init(99,7199);  //10ms中断
USART2_RX_STA=0;  //清零
TIM4_Set(0);   //关闭定时器4
#endif
}