GD32F427开发板配合Air780E模块实现CAT1通讯

Air780E展示

Air780E展示

合宙最近新出的cat1通讯模块

项目说明

本测试项目主要使用到GD32F427的UART串口通讯功能，使用串口发送AT指令，驱动Air780E实现相应的功能。

由于开发板某些串口被占用，本次使用串口1发送AT指令，使用串口2作为调试信息输出（将串口1和模块之间的通讯信息，通过串口2回显到PC端，方便调试）。下面是部分代码：

串口的定义及初始化

#define UART1_Clock      RCU_USART1
#define UART1_IO_Clock   RCU_GPIOD
#define UART1_IO_Port    GPIOD
#define UART1_TXD_Pin    GPIO_PIN_5
#define UART1_RXD_Pin    GPIO_PIN_6

#define UART2_Clock      RCU_USART2
#define UART2_IO_Clock   RCU_GPIOC
#define UART2_IO_Port    GPIOC
#define UART2_TXD_Pin    GPIO_PIN_10
#define UART2_RXD_Pin    GPIO_PIN_11

void UART1_Init(void)
{
    rcu_periph_clock_enable( UART1_Clock);       //
    rcu_periph_clock_enable(UART1_IO_Clock);     //
    /* connect port to USARTx_Tx */
    gpio_af_set(UART1_IO_Port, GPIO_AF_7, UART1_TXD_Pin);//
    /* connect port to USARTx_Rx */
    gpio_af_set(UART1_IO_Port, GPIO_AF_7, UART1_RXD_Pin);//

    /* configure USART Tx as alternate function push-pull */
    gpio_mode_set(UART1_IO_Port, GPIO_MODE_AF, GPIO_PUPD_PULLUP,UART1_TXD_Pin);              //
    gpio_output_options_set(UART1_IO_Port, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,UART1_TXD_Pin);  //

    /* configure USART Rx as alternate function push-pull */
    gpio_mode_set(UART1_IO_Port, GPIO_MODE_AF, GPIO_PUPD_PULLUP,UART1_RXD_Pin);             //
    gpio_output_options_set(UART1_IO_Port, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,UART1_RXD_Pin); //

    /* USART configure */
    usart_deinit(USART1);
    usart_baudrate_set(USART1,115200);
    usart_receive_config(USART1, USART_RECEIVE_ENABLE);    //
    usart_transmit_config(USART1, USART_TRANSMIT_ENABLE);  //
    //
    usart_enable(USART1);//

    nvic_irq_enable(USART1_IRQn, 0, 0);
    usart_interrupt_enable(USART1, USART_INT_RBNE);//
}
void UART2_Init(void)
{
    rcu_periph_clock_enable( UART2_Clock);       //
    rcu_periph_clock_enable(UART2_IO_Clock);     //
    /* connect port to USARTx_Tx */
    gpio_af_set(UART2_IO_Port, GPIO_AF_7, UART2_TXD_Pin);//
    /* connect port to USARTx_Rx */
    gpio_af_set(UART2_IO_Port, GPIO_AF_7, UART2_RXD_Pin);//

    /* configure USART Tx as alternate function push-pull */
    gpio_mode_set(UART2_IO_Port, GPIO_MODE_AF, GPIO_PUPD_PULLUP,UART2_TXD_Pin);              //
    gpio_output_options_set(UART2_IO_Port, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,UART2_TXD_Pin);  //

    /* configure USART Rx as alternate function push-pull */
    gpio_mode_set(UART2_IO_Port, GPIO_MODE_AF, GPIO_PUPD_PULLUP,UART2_RXD_Pin);             //
    gpio_output_options_set(UART2_IO_Port, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,UART2_RXD_Pin); //

    /* USART configure */
    usart_deinit(USART2);
    usart_baudrate_set(USART2,115200);
    usart_receive_config(USART2, USART_RECEIVE_ENABLE);    //
    usart_transmit_config(USART2, USART_TRANSMIT_ENABLE);  //
    //
    usart_enable(USART2);//

    nvic_irq_enable(USART2_IRQn, 0, 0);
    usart_interrupt_enable(USART2, USART_INT_RBNE);//
}

串口的接收和发送处理

unsigned char Data=0;
void USART1_IRQHandler(void)
{        
    
    while((RESET != usart_interrupt_flag_get(USART1, USART_INT_FLAG_RBNE)) &&(RESET != usart_flag_get(USART1, USART_FLAG_RBNE)))
    {
        /* Read one byte from the receive data register */
                Data=usart_data_receive(USART1);
                usart_data_transmit(USART2,Data);
    }
//    if((RESET != usart_flag_get(USART0, USART_FLAG_TBE)) &&(RESET != usart_interrupt_flag_get(USART0, USART_INT_FLAG_TBE)))
//    {
//        /* Write one byte to the transmit data register */
//        usart_data_transmit(USART0,0xff);
//    }
}


void UART1_Transmit(unsigned char *Data,unsigned int Lenth)
{
    int i=0;
        unsigned char U2_Data[256]={0};
        strcpy((char*)U2_Data,"Send:");
        strcat((char*)U2_Data, (char*)Data);
    for(i=0;i<Lenth;i++)
    {
        usart_data_transmit(USART1,Data[i]);
        while(RESET == usart_flag_get(USART1, USART_FLAG_TC));
    }
        for(i=0;i<strlen((char*)U2_Data);i++)
        {
                usart_data_transmit(USART2,U2_Data[i]);
        while(RESET == usart_flag_get(USART2, USART_FLAG_TC));
        }
}

主函数

/*!
    \brief      main function
    \param[in]  none
    \param[out] none
    \retval     none
*/
int main(void)
{
    /* configure systick */
    systick_config();

    /* enable the LED2 clock */
    rcu_periph_clock_enable(RCU_GPIOC);
    /* configure LED2 GPIO port */
    gpio_mode_set(GPIOC, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_6);
    gpio_output_options_set(GPIOC, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_6);

    /* reset LED2 GPIO pin */
    gpio_bit_reset(GPIOC, GPIO_PIN_6);

    /* enable the User Key GPIO clock */
    rcu_periph_clock_enable(RCU_GPIOA);

    /* configure key pin as input */
    gpio_mode_set(GPIOA, GPIO_MODE_INPUT, GPIO_PUPD_NONE, GPIO_PIN_0);
        UART1_Init();
        UART2_Init();
    while(1) {
                
                //delay_1ms(1000);
        /* check whether the key is pressed */
        if(RESET == gpio_input_bit_get(GPIOA, GPIO_PIN_0)) {
            delay_1ms(100);

            /* check whether the key is pressed */
            if(RESET == gpio_input_bit_get(GPIOA, GPIO_PIN_0)) {
                gpio_bit_write(GPIOC, GPIO_PIN_6, (bit_status)(1 - gpio_input_bit_get(GPIOC, GPIO_PIN_6)));
            }

            while(RESET == gpio_input_bit_get(GPIOA, GPIO_PIN_0)) {
            }
                        UART1_Transmit((unsigned char *)"AT\r\n",strlen("AT\r\n"));
                        delay_1ms(1000);
                        UART1_Transmit((unsigned char *)"AT+CPIN?\r\n",strlen("AT+CPIN?\r\n"));
                        delay_1ms(1000);
                        UART1_Transmit((unsigned char *)"AT+CSQ\r\n",strlen("AT+CSQ\r\n"));
                        delay_1ms(1000);
                        UART1_Transmit((unsigned char *)"AT+CGATT?\r\n",strlen("AT+CGATT?\r\n"));
                        delay_1ms(1000);
                        UART1_Transmit((unsigned char *)"AT+CSTT\r\n",strlen("AT+CSTT\r\n"));
                        delay_1ms(1000);
                        UART1_Transmit((unsigned char *)"AT+CIICR\r\n",strlen("AT+CIICR\r\n"));
                        delay_1ms(1000);
                        UART1_Transmit((unsigned char *)"AT+CIFSR\r\n",strlen("AT+CIFSR\r\n"));
                        delay_1ms(1000);
                        UART1_Transmit((unsigned char *)"AT+CIPSTART=\"TCP\",\"112.125.89.8\",\"36146\"\r\n",strlen("AT+CIPSTART=\"TCP\",\"112.125.89.8\",\"36146\"\r\n"));
                        delay_1ms(1000);
                        UART1_Transmit((unsigned char *)"AT+CIPSEND=10\r\n",strlen("AT+CIPSEND=10\r\n"));
                        delay_1ms(1000);
                        UART1_Transmit((unsigned char *)"GD32F427V!\r\n",strlen("GD32F427V!\r\n"));
                        delay_1ms(1000);
        }
    }
}