【嵌入式】微芯旺KungFu32A156MQT与PC进行串口通信

需要购买USB转串口芯片，安装串口驱动

串口检测软件

USART0.h

#ifndef USART0_H_
#define USART0_H_

#include "system_init.h"
#include <stdint.h>


#define STD_OFF  (0U)
#define STD_ON  (1U)

#define POLLING (0U)
#define INTERRUPT (1U)

#define ASYNCH (0U)
#define SYNCH  (1U)

#define USART_TX_PROCESSING     INTERRUPT
#define USART_RX_PROCESSING     INTERRUPT


#define USART_TX_DMA            STD_ON
#define USART_TX_DMA            STD_ON

#define  USART_WORKING_MODE      ASYNC

/**
 *  @brief :初始化USART0的GPIO
 *  @retval :PA3 -- USART0_TX
 *           PA2 -- USART0_RX
 */
void Usart_Gpio_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    //将PA3重映射模式配置为TX引脚
    GPIO_InitStructure.m_Mode = GPIO_MODE_RMP;
    GPIO_InitStructure.m_OpenDrain = GPIO_POD_PP;
    GPIO_InitStructure.m_PullDown = GPIO_NOPULL;
    GPIO_InitStructure.m_PullUp = GPIO_NOPULL;
    GPIO_InitStructure.m_Speed = GPIO_LOW_SPEED;
    GPIO_InitStructure.m_Pin = GPIO_PIN_MASK_3;
    GPIO_Configuration(GPIOA_SFR, &GPIO_InitStructure);
    //将PA2重映射模式配置为RX引脚，配置为上拉模式
    GPIO_InitStructure.m_PullUp = GPIO_PULLUP;
    GPIO_InitStructure.m_Pin = GPIO_PIN_MASK_7;
    GPIO_Configuration(GPIOE_SFR, &GPIO_InitStructure);
    /* 配置PA3重新映射功能至AF3 */
    GPIO_Pin_RMP_Config(GPIOA_SFR, GPIO_Pin_Num_3, GPIO_RMP_AF3);
    /* 配置PA2重新映射功能至AF3 */
    GPIO_Pin_RMP_Config(GPIOE_SFR, GPIO_Pin_Num_7, GPIO_RMP_AF3);
}

/**
 *  @brief :USART发送数据
 *  @param in :USARTx :指向USART内存结构的指针,值为
 *                                      USART0_SFR
 *                                      USART1_SFR
 *                                      USART2_SFR
 *                                      USART5_SFR
 *              Usart_Sdu: Data   : 指向发送数据的指针
 *                         Length : 传输数据长度
 */
void USART_Send(USART_SFRmap *USARTx, uint8_t *Databuf, uint32_t length)
{
    for (uint32_t i = 0; i < length; i++)
        USART_SendData(USARTx, Databuf[i]);//串行传输
}

/**
 *  @brief :配置USART模式
 *  @param in :USARTx：指向USART内存结构的指针，值为
 *                                        USART0_SFR
 *                                         USART1_SFR
 *                                         USART2_SFR
 *                                         USART5_SFR
 */
void USART_Mode_Config(USART_SFRmap *USARTx)
{
    USART_InitTypeDef USART_InitStructure;
    USART_Struct_Init(&USART_InitStructure);
    //将Usart设置为异步模式
    USART_InitStructure.m_Mode = USART_MODE_FULLDUPLEXASY;
    USART_InitStructure.m_TransferDir = USART_DIRECTION_FULL_DUPLEX;
    USART_InitStructure.m_WordLength = USART_WORDLENGTH_8B;
    USART_InitStructure.m_StopBits = USART_STOPBITS_1;
    //设置波特率为115200
    USART_InitStructure.m_BaudRateBRCKS = USART_CLK_HFCLK;
    USART_InitStructure.m_BaudRateInteger = 8;
    USART_InitStructure.m_BaudRateNumerator = 1;
    USART_InitStructure.m_BaudRateDenominator = 13;
    //使能send
    USART_Reset(USARTx);
    USART_Configuration(USARTx, &USART_InitStructure);
    USART_Passageway_Select_Config(USARTx, USART_U7816R_PASSAGEWAY_TX0);
    USART_RESHD_Enable(USARTx, TRUE);
    USART_Transmit_Data_Enable(USARTx, TRUE);
    USART_Cmd(USARTx, TRUE);
}

/**
 *  @brief :配置USART初始化
 *  @param in :
 *         USARTx :指向USART内存结构的指针
                                                  USART0_SFR
 *                                         USART1_SFR
 *                                         USART2_SFR
 *                                         USART5_SFR
 *           Peripheral :中断矢量编号
 *                                      INT_USART0
 *                                    INT_USART1
 *                                    INT_USART2
 *                                    INT_USART5
 */
void USART_Int_Config(USART_SFRmap *USARTx, InterruptIndex Peripheral)
{
    USART_Receive_Data_Enable(USARTx, TRUE);//重置USARTx发送BUF中断位
    USART_RDR_INT_Enable(USARTx, TRUE);//USARTx RDR中断启用
    USART_Receive_Idle_Frame_Config(USARTx, TRUE);
    USART_IDLE_INT_Enable(USARTx, TRUE);//配置USART以接收空闲帧中断标志生成模式
    INT_Interrupt_Enable(Peripheral, TRUE);//中断启用外围或内核中断向量
}

#endif /* USART0_H_ */

设置中断函数

kf_it.c

#include "system_init.h"
//Usart0接收数据计数
volatile uint32_t TransmitCount=0;
extern uint8_t UsartTxBuffer[];
extern uint8_t UsartRxBuffer[];
void __attribute__((interrupt)) _USART0_exception (void)
{
    static uint32_t ReceiveCount = 0;
    //如果获取USART数据就绪中断标志的状态
    if(USART_Get_Receive_BUFR_Ready_Flag(USART0_SFR))
        UsartRxBuffer[ReceiveCount++] = USART_ReceiveData(USART0_SFR);
    //如果获取接收空闲帧的USART中断标志
    if (USART_Get_Receive_Frame_Idel_Flag(USART0_SFR))
    {
        USART_Clear_Idle_INT_Flag(USART0_SFR);//清除空闲中断标志
        TransmitCount = ReceiveCount;//获取接收的数据的长度
        ReceiveCount = 0;
    }
}

设置主函数，先向PC发送10个hellowirld，然后接收PC发送的数据，并再发送给PC

main.c

#include"system_init.h"
#include"kf32a156_gpio.h"
#include"USART0.h"

uint8_t  Usart_Send_Sdu[] = {"HelloWorld"};
//Usart发送数据数组和接收数据数组
uint8_t UsartTxBuffer[100];
uint8_t UsartRxBuffer[100];
extern volatile uint32_t TransmitCount ;

int main()
{
    SystemInit(120);///<初始化系统时钟为120M
    systick_delay_init(120);///<设置SysTick定时器作为延迟功能，输入频率为120M
    Usart_Gpio_Init();//设置Usart的Tx和Rx口——PA3为TX，PA2为RX
    USART_Mode_Config(USART0_SFR);//配置USART模式
    USART_Int_Config(USART0_SFR,INT_USART0);//配置USART初始化
    INT_Priority_Group_Config(INT_PRIORITY_GROUP_3VS1);//配置中断优先级组，默认值为3VS1
    INT_All_Enable(TRUE);//全局屏蔽中断启用位
    for(int i=0;i<10;i++){
        USART_Send(USART0_SFR, Usart_Send_Sdu, sizeof(Usart_Send_Sdu));
        systick_delay_ms(250);
    }
    while(1){
        //如果接收到PC数据，将数据发回去
        if (TransmitCount)
        {
            memcpy(UsartTxBuffer, UsartRxBuffer, TransmitCount);//将数据从UsartRxBuffer复制到TransmitCount
            USART_Send(USART0_SFR, UsartTxBuffer, TransmitCount);
            TransmitCount = 0;//清除传输计数
        }
    }
}