easydemo_STM32F41x_297S/myUart/myUart.c

#include "myUart.h" 
#include "stm32f4xx_rcc.h"
#include "stm32f4xx_usart.h"
#include "stm32f4xx_gpio.h"
#include "stm32f4xx_it.h" 
#include "misc.h"

UART_CALLBACK uartCallBack;
   
uint8_t USART_RX_BUF[USART_REC_LEN];     //
uint16_t USART_RX_STA=0;       //接收状态标记    
// static irqCallback_ts myIrqCallback_uart1;

// void uart1_callback(uint8_t status, uint32_t param)
// {
//     uint8_t Res;

//     switch (status)
//     {
//     case 0:
//     {
//         uartCallBack(USART_RX_BUF, USART_RX_STA);
//         memset(USART_RX_BUF, 0, sizeof(USART_RX_BUF));
//         USART_RX_STA=0;
//     }
//         break;
//     case 1:
//     {
//         //读取接收到的数据
//         USART_RX_BUF[USART_RX_STA] = param;
//         USART_RX_STA++;
//         if(USART_RX_STA > (USART_REC_LEN - 1))
//         {
//             USART_RX_STA=0;//接收数据错误,重新开始接收    
//         }
//     }
//         break;
    
//     default:
//         break;
//     }
// }
void myUart1_init(uint32_t baudrate, UART_CALLBACK cb)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    // myIrqCallback_uart1.thisCb = uart1_callback;
    // USART1_callbackRegiste(&myIrqCallback_uart1);  

	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE); //使能GPIOA时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);  //使能USART1，GPIOA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_TX   GPIOA.9
    GPIO_StructInit(&GPIO_InitStructure);//初始化GPIOA.9
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10; //PA.9
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;  //复用推挽输出
	GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //上拉
    GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.9


    // //Usart1 NVIC 配置
    // NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
    // 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VIC寄存器

    //USART 初始化设置

    USART_InitStructure.USART_BaudRate = baudrate;//串口波特率
    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;//无奇偶校验位
    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_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启串口接受中断
    // USART_ITConfig(USART1, USART_IT_IDLE, ENABLE);//开启串口接受中断
    // USART_ITConfig(USART1, USART_IT_TC, ENABLE);// 使能串口发送完成中断

    USART_Cmd(USART1, ENABLE);                    //使能串口1 
    // uartCallBack = cb;
}

void myUart1_sendByte(uint8_t src)
{
    while(!USART_GetFlagStatus(USART1, USART_FLAG_TC));
    USART_SendData(USART1, src);
}
void myUart1_sendArray(uint8_t *src, uint16_t srclen)
{      
    while(srclen --)
    {
        myUart1_sendByte(*src);
        src ++;
    }
}
//////////////////////////////////////////////////////////////////
//加入以下代码,支持printf函数,而不需要选择use MicroLIB    
#if 1
#pragma import(__use_no_semihosting)             
//标准库需要的支持函数                 
struct __FILE 
{ 
    int handle; 

}; 

FILE __stdout;       
//定义_sys_exit()以避免使用半主机模式    
void _sys_exit(int x) 
{ 
    x = x; 
} 
//重定义fputc函数 
int fputc(int ch, FILE *f)
{      
    while((USART1->SR&0X40)==0);//循环发送,直到发送完毕   
    USART1->DR = (uint8_t) ch;      
    return ch;
}
#endif