用STM32F407开发板实现4G模块EC200S拨打电话功能 - Mcuzone 野芯科技

int fputc(int ch, FILE *f)
{
while((USART1->SR&0x40)==0);
USART1->DR = (u8) ch;
return ch;
}
void USART1_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE); //使能GPIOA时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE); //使能USART1时钟
//串口1对应引脚复用映射
GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_USART1); //GPIOA9复用为USART1
GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_USART1); //GPIOA10复用为USART1
//USART1端口配置
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10; //GPIOA9与GPIOA10
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF；//复用功能
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //速度50MHZ
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽复用输出
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP；//上拉
GPIO_Init(GPIOA,&GPIO_InitStructure); //初始化PA9，PA10。
//USART1初始化设置
USART_InitStructure.USART_BaudRate = 115200; //波特率设置
USART_InitStructure.USART_WordLength = USART_WordLength_8b; //字长为8位数据格式
USART_InitStructure.USART_StopBits = USART_StopBits_1; //一个停止位
USART_InitStructure.USART_Parity = USART_Parity_No; //无奇偶校验
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; //无硬件数据流控制
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式
USART_Init(USART1, &USART_InitStructure); //初始化串口1
USART_Cmd(USART1, ENABLE); //使能串口1
USART_ClearFlag(USART1, USART_FLAG_TC);
#if EN_USART1_RX
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); //开启相关中断
//USART NVIC配置
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; //串口1中断通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3; //抢占优先级3
NVIC_InitStructure.NVIC_IRQChannelSubPriority =3; //子优先级3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化NVIC寄存器
#endif
}
void USART_PutChar(char Data)
{
USART_SendData(USART1,Data);
while(USART_GetFlagStatus(USART1,USART_FLAG_TC)==RESET)
{
}
}
void USART_PutStr(char *str)
{
while(0 != *str)
{
USART1->SR;
USART_PutChar(*str);
str++;
}
}
void USART1_IRQHandler(void)
{
u8 Res;
if(USART_GetITStatus(USART1,USART_IT_RXNE) != RESET) //接收中断
{
Res =USART_ReceiveData(USART1); //读取接收到的数据
if((USART_RX_STA&0x8000)==0) //接收未完成
{
if(USART_RX_STA&0x4000) //接收到了0x0D
{
if(Res!=0x0a)USART_RX_STA=0; //接收错误重新开始
else USART_RX_STA|=0x8000; //接收完成了
}
else //还没有收到0X0D
{
if(Res==0x0d)USART_RX_STA|=0x4000;
else
{
USART_RX_BUF[USART_RX_STA&0X3FFF]=Res ;
USART_RX_STA++;
if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0; //数据接收错误重新开始接收
}
}
}
}
}

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主函数代码

int main(void)
{
delay_init(168); //初始化延时函数
LED_Init();
USART1_Init();
USART_PutStr("ATD此处改为自己的电话号码;\r"); //拨打电话
while(1)
{
delay_ms(1000);
}
}

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