串口的功能網(wǎng)上有很多，但是處理串口的數(shù)據(jù)需要一些小手段，但是str的函數(shù)有點才長，不適用長的數(shù)據(jù)接收，所以給310搞一個接收數(shù)據(jù)的輕量級API的小玩意。

開發(fā)環(huán)境

Keil-MDK 5.34

Windows10

固件庫-GD32F3x0_Firmware_Library_V2.2.0

新建工程就不贅述，看這個

啟動串口

void uart_init(void)
{
    //使能時鐘
    rcu_periph_clock_enable(RCU_GPIOA);
    rcu_periph_clock_enable(RCU_USART0);
    
    //Tx PA9 復(fù)用推挽輸出
    gpio_mode_set(GPIOA,GPIO_MODE_AF,GPIO_PUPD_PULLUP,GPIO_PIN_9);
    gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_9);
    //Rx    PA10
    gpio_mode_set(GPIOA,GPIO_MODE_AF,GPIO_PUPD_PULLUP,GPIO_PIN_10);
    gpio_output_options_set(GPIOA, GPIO_OTYPE_PP,GPIO_OSPEED_50MHZ, GPIO_PIN_10);
    nvic_irq_enable(USART0_IRQn,0,0);
    gpio_af_set(GPIOA,GPIO_AF_1,GPIO_PIN_9|GPIO_PIN_10);
    /*USART 設(shè)置*/
    usart_deinit(USART0);
    usart_baudrate_set(USART0,115200);
    usart_word_length_set(USART0,USART_WL_8BIT);
    usart_stop_bit_set(USART0,USART_STB_1BIT);
    usart_parity_config(USART0,USART_PM_NONE);
    usart_hardware_flow_rts_config(USART0,USART_RTS_DISABLE);
    usart_hardware_flow_cts_config(USART0,USART_CTS_DISABLE);
    usart_receive_config(USART0,USART_RECEIVE_ENABLE);
    usart_transmit_config(USART0,USART_TRANSMIT_ENABLE);
    usart_enable(USART0);
    usart_interrupt_enable(USART0,USART_INT_RBNE);
    usart_interrupt_enable(USART0, USART_INT_IDLE);         /* 使能USART0空閑中斷 */
}
//串口中斷配置
uint16_t t=0;
void USART0_IRQHandler(void)
{
    if(RESET!=usart_interrupt_flag_get(USART0,USART_INT_FLAG_RBNE))
    {
        gd_led_toggle();
        t=usart_data_receive(USART0);//接收數(shù)據(jù)
        usart_data_transmit(USART0,USART_RX[t]);
        usart_interrupt_disable(USART0,USART_INT_RBNE);
        usart_data_transmit(USART0,t);
    }else if(RESET!=usart_interrupt_flag_get(USART0,USART_INT_FLAG_IDLE))
    {
        usart_interrupt_disable(USART0,USART_INT_IDLE);
    }
}

數(shù)據(jù)處理API

struct _Chang_Num
{
    char *Source;
    char Sign[8];
    float NUM[8];
    char flag;
};

char Data_Chang_NUM (struct _Chang_Num *Item)
{
    char Data_Array[12] = {0};                  //數(shù)字的str數(shù)
    char str[36];                               //裝source數(shù)據(jù)到這個緩存區(qū)，這個緩存區(qū)是要變的
    char Data;
    char n,m = 0;
    char i,flag = 1;                            //i是當前找的是 第幾個 Sign
    char Find_Time = strlen(Item->Sign);        //要找多少個
    char Length = strlen(Item->Source);         //源的長度
    strcpy(str,Item->Source);
    if(Length > 36)
        Length = 36;
    for (i = 0; i < Find_Time; i++)
    {
        flag = 0;
        for(n = 0;n < Length;n++)
        {
            Data = str[n];
            if(str[n] == Item->Sign[i])           //找到標志
            {
                str[n] = 0;
                flag = 1;                       //開始識別str
                m = 0;
            }
            if(flag)
            {
                if((str[n] <= '9' && str[n] >= '0') || str[n] == '.' || str[n] == '-')
                {
                    Data_Array[m] = str[n];               //把數(shù)字相關(guān)str的裝起來
                    m++;                                //m是數(shù)字在str的長度
                }
                else
                {
                    if(m > 0)                            //數(shù)字部分結(jié)束
                    {
                        if(Data_Array[m-1] == '.' || Data_Array[m-1] == '-')    //不讓最后一位為 '.' and '-'
                            Data_Array[m-1] = '\0';
                        else
                            Data_Array[m] = '\0';
                            
                        break;
                    }
                }
            }
        
        }
        Item->NUM[i] = atof(Data_Array);
        // Data_Replace ("123",Data_Array,0,sizeof(Data_Array));
    }
    return Item->flag;
}

配置好你想要的參數(shù)在結(jié)構(gòu)體中，然后將串口的緩沖區(qū)放入這個函數(shù)即可。

將printf函數(shù)映射到串口，看這里

struct _Chang_Num Item_n = {
    .Source = "a:3.14......,b:3322..,c:-9.0..-",
    .Sign = {':',':',':'},
};
int main (void)
{
    printf("sign :%s",Item_n.Sign);
    Data_Chang_NUM (&Item_n);
    for (char i = 0; i < 3; i++)
    {
        printf("num %d :%.2f \n",i,Item_n.NUM[i]);
    }
    while(1);
}

API效果

審核編輯：劉清