1000字范文 > 【4G模块】中移物联ML302 + GD32F407 使用支持MQTT协议AT指令接入阿里云物联网平台

【4G模块】中移物联ML302 + GD32F407 使用支持MQTT协议AT指令接入阿里云物联网平台

时间：2019-03-19 07:47:20

〇、目的、GD32、ML302相关简介

0.目的：

1.ML302：

2.LTE Cat.1:

3.GD32F407

一、GD芯片创建工程写驱动：LED、串口4、4G模块

1.创建工程

2.LED的GPIO驱动

3.debug串口驱动

4.4G模组的供电、开机、串口

二、测试ML302能否正常连接TCP服务器 AT指令说明

三、使用MQTT协议连接阿里云物联网平台

四、成果展示：

〇、目的、GD32、ML302相关简介

0.目的：

使用手上的开发板（mcu为gd32f407+4G模组中移物联ML302），连接阿里云物联网平台，实现数据的上行和下行。

使用4G模组支持的mqtt协议AT指令。

其实就是测试一些这个开发板和模组，顺便学习一下......

1.ML302：

ML302 是中国移动最新推出的 LTE Cat.1 模块。ML302 支持 LTE- TDD/LTE- FDD/GSM，同时支持 GNSS/BT/

Wi- Fi Scan。采用 LCC+LGA 封装方式。ML302丰富的 Internet 协议、行业标准接口和功能，支持 Windows、Linux 和 Android 驱动。ML302 可广泛应用到 M2M多个领域中，如共享、金融支付、POC、工业控制等。

这个4G模组真的是太好用了，丰富的AT指令，想比之前的8266可以少些很多代码。

2.LTE Cat.1:

简单说，就是“低配版”的4G终端！

3.GD32F407

兆易创新为国内存储的龙头企业，主营业务包括存储器，微处理器以及传感器等。

据说芯片和ST的是pin_to_pin兼容，但是因版权还是有一些小差别，这里我使用的GD官方的开发库。（本来打算用STM32CubeMX直接生成工程，但这样还要改动底层的一些东西....）

下载GD固件库（去官网）：/cn/download?kw=GD32F4

【GD32相关芯片资料】有需要请参考这份资料很全，GD所有芯片系列固件库、datasheet、用户手册...

链接：百度网盘-官网公开资料（全）

提取码：20fc

一、GD芯片创建工程写驱动：LED、串口4、4G模块

1.创建工程

创建工程有两种方式：1是按照固件库中的模板直接打开直接换文件直接用，2是自己创建一个空工程，再一个一个文件添加到工程中，这里我选择的方法2。

创建工程，选择芯片型号（提前下载DFP芯片安装包），添加文件组，设置魔术棒中的选项（宏、路径...），编译....

2.LED的GPIO驱动

查看开发板原理图，找到LED的电路图和芯片的GPIO

按照GD固件库中的示例对GPIO进行编程。

led.h

#ifndef LED_H#define LED_H#ifdef __cplusplusextern "C" {#endif#include "gd32f4xx.h"#include "systick.h"/* exported types */typedef enum {LED1 = 0,LED2 = 1,LED3 = 2} led_typedef_enum;/*PD10 --> LED1PD11 --> LED2*//* eval board low layer led */#define LEDn 2U#define LED1_PINGPIO_PIN_10#define LED1_GPIO_PORT GPIOD#define LED1_GPIO_CLKRCU_GPIOD#define LED2_PINGPIO_PIN_11#define LED2_GPIO_PORT GPIOD#define LED2_GPIO_CLKRCU_GPIOD/* function declarations *//* configures led GPIO */void gd_eval_led_init(led_typedef_enum lednum);/* turn on selected led */void gd_eval_led_on(led_typedef_enum lednum);/* turn off selected led */void gd_eval_led_off(led_typedef_enum lednum);/* toggle the selected led */void gd_eval_led_toggle(led_typedef_enum lednum);void zdw_led_loop(void);void zdw_led1_on(void);void zdw_led2_on(void);void zdw_led1_off(void);void zdw_led2_off(void);void zdw_bsp_led_init(void);#ifdef __cplusplus}#endif#endif

led.c

#include "led.h"/* private variables */static uint32_t GPIO_PORT[LEDn] = {LED1_GPIO_PORT, LED2_GPIO_PORT};static uint32_t GPIO_PIN[LEDn] = {LED1_PIN, LED2_PIN};static rcu_periph_enum GPIO_CLK[LEDn] = {LED1_GPIO_CLK, LED2_GPIO_CLK};/*!\briefconfigure led GPIO\param[in] lednum: specify the Led to be configured\arg LED1\arg LED2\arg LED3\param[out] none\retvalnone*/void gd_eval_led_init (led_typedef_enum lednum){/* enable the led clock */rcu_periph_clock_enable(GPIO_CLK[lednum]);/* configure led GPIO port */ gpio_mode_set(GPIO_PORT[lednum], GPIO_MODE_OUTPUT, GPIO_PUPD_NONE,GPIO_PIN[lednum]);gpio_output_options_set(GPIO_PORT[lednum], GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,GPIO_PIN[lednum]);GPIO_BC(GPIO_PORT[lednum]) = GPIO_PIN[lednum];}/*!\briefturn on selected led\param[in] lednum: specify the Led to be turned on\arg LED1\arg LED2\param[out] none\retvalnone*/void gd_eval_led_on(led_typedef_enum lednum){GPIO_BOP(GPIO_PORT[lednum]) = GPIO_PIN[lednum];}/*!\briefturn off selected led\param[in] lednum: specify the Led to be turned off\arg LED1\arg LED2\param[out] none\retvalnone*/void gd_eval_led_off(led_typedef_enum lednum){GPIO_BC(GPIO_PORT[lednum]) = GPIO_PIN[lednum];}/*!\brieftoggle selected led\param[in] lednum: specify the Led to be toggled\arg LED1\arg LED2\param[out] none\retvalnone*/void gd_eval_led_toggle(led_typedef_enum lednum){GPIO_TG(GPIO_PORT[lednum]) = GPIO_PIN[lednum];}void zdw_led_loop(void){/* turn on led1, turn off led3 */gd_eval_led_on(LED1); delay_1ms(100);gd_eval_led_off(LED1);/* turn on led2, turn off led1 */gd_eval_led_on(LED2);delay_1ms(200);gd_eval_led_off(LED2); }void zdw_led1_on(void){gd_eval_led_on(LED1);}void zdw_led2_on(void){gd_eval_led_on(LED2);}void zdw_led1_off(void){gd_eval_led_off(LED1);}void zdw_led2_off(void){gd_eval_led_off(LED2);}void zdw_bsp_led_init(void){gd_eval_led_init(LED1);gd_eval_led_init(LED2);}

发现GD库和ST的固件库以及HAL库的结构体编程思想有些差别，但是总体的流程是一样的。函数的功能也看函数名就能猜到大概意思。

3.debug串口驱动

uart_debug.h

#ifndef UART_DEBUG_H#define UART_DEBUG_H#include "gd32f4xx_usart.h"#include <stdio.h>#define COMn 1U#define EVAL_COM0 UART4#define EVAL_COM0_CLKRCU_UART4#define EVAL_COM0_TX_PIN GPIO_PIN_12#define EVAL_COM0_RX_PIN GPIO_PIN_2#define EVAL_COM0_GPIO_TX_PORT GPIOC#define EVAL_COM0_GPIO_TX_CLKRCU_GPIOC#define EVAL_COM0_TX_AF GPIO_AF_8#define EVAL_COM0_GPIO_RX_PORT GPIOD#define EVAL_COM0_GPIO_RX_CLKRCU_GPIOD#define EVAL_COM0_RX_AF GPIO_AF_8/* configure COM port */void gd_eval_com_init(uint32_t com);//void nvic_debug_uart_config(void);#endif

uart_debug.c

#include "uart_debug.h"static rcu_periph_enum COM_CLK[COMn] = {EVAL_COM0_CLK};static uint32_t COM_TX_PIN[COMn] = {EVAL_COM0_TX_PIN};static uint32_t COM_RX_PIN[COMn] = {EVAL_COM0_RX_PIN};/*!\briefconfigure COM port\param[in] COM: COM on the board\arg EVAL_COM0: COM on the board\param[out] none\retvalnone*/void gd_eval_com_init(uint32_t com){/* enable GPIO clock */uint32_t COM_ID = 0;if(EVAL_COM0 == com){COM_ID = 0U;}rcu_periph_clock_enable( EVAL_COM0_GPIO_TX_CLK);rcu_periph_clock_enable( EVAL_COM0_GPIO_RX_CLK);/* enable USART clock */rcu_periph_clock_enable(COM_CLK[COM_ID]);/* connect port to USARTx_Tx Rx*/gpio_af_set(EVAL_COM0_GPIO_TX_PORT, EVAL_COM0_TX_AF, COM_TX_PIN[COM_ID]);gpio_af_set(EVAL_COM0_GPIO_RX_PORT, EVAL_COM0_RX_AF, COM_RX_PIN[COM_ID]);/* configure USART Tx as alternate function push-pull */gpio_mode_set(EVAL_COM0_GPIO_TX_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP,COM_TX_PIN[COM_ID]);gpio_output_options_set(EVAL_COM0_GPIO_TX_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,COM_TX_PIN[COM_ID]);/* configure USART Rx as alternate function push-pull */gpio_mode_set(EVAL_COM0_GPIO_RX_PORT, GPIO_MODE_INPUT, GPIO_PUPD_PULLUP,COM_RX_PIN[COM_ID]);gpio_output_options_set(EVAL_COM0_GPIO_RX_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,COM_RX_PIN[COM_ID]);/* USART configure */usart_deinit(com);usart_baudrate_set(com,115200U);usart_receive_config(com, USART_RECEIVE_ENABLE);usart_transmit_config(com, USART_TRANSMIT_ENABLE);usart_enable(com);/* enable the USART receive interrupt */usart_interrupt_enable(com, USART_INT_RBNE);//config nvicnvic_debug_uart_config();}/* retarget the C library printf function to the USART */int fputc(int ch, FILE *f){usart_data_transmit(EVAL_COM0, (uint8_t)ch);while(RESET == usart_flag_get(EVAL_COM0, USART_FLAG_TBE));return ch;}//config nvicvoid nvic_debug_uart_config(void){nvic_irq_enable(UART4_IRQn, 0, 1);}

这里使用中断的方法接受串口数据：

gd32f4xx_it.c

#include "gd32f4xx_it.h"#include "main.h"#include "systick.h"#include "uart_debug.h"#include "uart_4G.h"/*!\briefthis function handles NMI exception\param[in] none\param[out] none\retvalnone*/void NMI_Handler(void){}/*!\briefthis function handles HardFault exception\param[in] none\param[out] none\retvalnone*/void HardFault_Handler(void){/* if Hard Fault exception occurs, go to infinite loop */while (1){}}/*!\briefthis function handles MemManage exception\param[in] none\param[out] none\retvalnone*/void MemManage_Handler(void){/* if Memory Manage exception occurs, go to infinite loop */while (1){}}/*!\briefthis function handles BusFault exception\param[in] none\param[out] none\retvalnone*/void BusFault_Handler(void){/* if Bus Fault exception occurs, go to infinite loop */while (1){}}/*!\briefthis function handles UsageFault exception\param[in] none\param[out] none\retvalnone*/void UsageFault_Handler(void){/* if Usage Fault exception occurs, go to infinite loop */while (1){}}/*!\briefthis function handles SVC exception\param[in] none\param[out] none\retvalnone*/void SVC_Handler(void){}/*!\briefthis function handles DebugMon exception\param[in] none\param[out] none\retvalnone*/void DebugMon_Handler(void){}/*!\briefthis function handles PendSV exception\param[in] none\param[out] none\retvalnone*/void PendSV_Handler(void){}/*!\briefthis function handles SysTick exception\param[in] none\param[out] none\retvalnone*/void SysTick_Handler(void){//led_spark();delay_decrement();}extern int count_zdw;//debug uart : void UART4_IRQHandler(void){uint8_t ch = 0;//if((RESET != usart_interrupt_flag_get(EVAL_COM0, USART_INT_FLAG_RBNE)) && (RESET != usart_flag_get(EVAL_COM0, USART_FLAG_RBNE))){/* receive data */ch = (usart_data_receive(EVAL_COM0) & 0x7F);//then : send againusart_data_transmit(COM_4G_UART, (uint8_t)ch);}// if((RESET != usart_flag_get(EVAL_COM0, USART_FLAG_TBE)) && // (RESET != usart_interrupt_flag_get(EVAL_COM0, USART_INT_FLAG_TBE))){// /* transmit data */// usart_data_transmit(EVAL_COM0, txbuffer[txcount++]);// if(txcount >= rxcount)// {// usart_interrupt_disable(EVAL_COM0, USART_INT_TBE);// }// }}/*!\briefthis function handles USART1 :4G\param[in] none\param[out] none\retvalnone*/void USART1_IRQHandler(void){uint8_t ch = 0;count_zdw++;if((RESET != usart_interrupt_flag_get(COM_4G_UART, USART_INT_FLAG_RBNE)) && (RESET != usart_flag_get(COM_4G_UART, USART_FLAG_RBNE))){/* receive data */ch = (usart_data_receive(COM_4G_UART) & 0x7F);//then : send to uart4 againusart_data_transmit(EVAL_COM0, (uint8_t)ch);}}

4.4G模组的供电、开机、串口

uart_4G.h

#ifndef UART_4G_H#define UART_4G_H/*Power:MCU_PWR_4G PB8PowerOn:MCU_POWERON_MODULEPD5UART1: MCU_USART1_TX PA2MCU_USART1_RX PA3*/#include "gd32f4xx_usart.h"#include <stdio.h>//GPIO -- Power : #define MCU_PWR_4G_PINGPIO_PIN_8#define MCU_PWR_4G_GPIO_PORT GPIOB#define MCU_PWR_4G_GPIO_CLKRCU_GPIOB//GPIO -- PowerOn :1s#define MCU_POWERON_MODULE_PIN GPIO_PIN_5#define MCU_POWERON_MODULE_PORT GPIOD#define MCU_POWERON_MODULE_CLK RCU_GPIOD//Power GPIO configvoid zdw_power_4G_gpio_config(void);//Power enable : 1 secondvoid zdw_power_4G_enable_1s(void);//PowerOn : GPIO configvoid zdw_poweron_4G_gpio_config();//PowerOn :void zdw_poweron_4G(void);//UART #define COM_4G_UART USART1#define COM_4G_CLKRCU_USART1#define COM_4G_TX_PIN GPIO_PIN_2#define COM_4G_TX_PORTGPIOA#define COM_4G_TX_CLK RCU_GPIOA#define COM_4G_TX_AF GPIO_AF_7#define COM_4G_RX_PIN GPIO_PIN_3#define COM_4G_RX_PORTGPIOA#define COM_4G_RX_CLK RCU_GPIOA#define COM_4G_RX_AF GPIO_AF_7//config 4G_Uartvoid gd_4G_uart_com_init(void);//USART1 send data : send data to 4Gvoid zdw_uart1_send_data_len(char* data,int len);//USART1 send string :send data to 4Gvoid zdw_uart1_send_string(char* str);//4G//4G model init :main usevoid zdw_4G_model_init(void);#endif

uart_4G.c

#include "uart_4G.h"#include "systick.h"//congig nvicstatic void nvic_4G_uart_config(void){nvic_irq_enable(USART1_IRQn, 0, 1);}//config 4G_Uart : USART1void gd_4G_uart_com_init(void){/* enable GPIO clock */rcu_periph_clock_enable(COM_4G_TX_CLK);rcu_periph_clock_enable(COM_4G_RX_CLK);/* enable USART clock */rcu_periph_clock_enable(COM_4G_CLK);/* connect port to USARTx_Tx Rx*/gpio_af_set(COM_4G_TX_PORT, COM_4G_TX_AF, COM_4G_TX_PIN);gpio_af_set(COM_4G_RX_PORT, COM_4G_RX_AF, COM_4G_RX_PIN);/* configure USART Tx as alternate function push-pull */gpio_mode_set(COM_4G_TX_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP,COM_4G_TX_PIN);gpio_output_options_set(COM_4G_TX_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,COM_4G_TX_PIN);/* configure USART Rx as alternate function push-pull */gpio_mode_set(COM_4G_RX_PORT, GPIO_MODE_INPUT, GPIO_PUPD_PULLUP,COM_4G_RX_PIN);gpio_output_options_set(COM_4G_RX_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,COM_4G_RX_PIN);/* USART configure */usart_deinit(COM_4G_UART);usart_baudrate_set(COM_4G_UART,115200U);usart_receive_config(COM_4G_UART, USART_RECEIVE_ENABLE);usart_transmit_config(COM_4G_UART, USART_TRANSMIT_ENABLE);usart_enable(COM_4G_UART); /* enable the USART receive interrupt */usart_interrupt_enable(COM_4G_UART, USART_INT_RBNE);//config nvicnvic_irq_enable(USART1_IRQn, 0, 1);}//USART1 send data : send data to 4Gvoid zdw_uart1_send_data_len(char* data,int len){int i = 0;for(i = 0;i < len;i++){usart_data_transmit(COM_4G_UART, data[i]);}}//USART1 send string :send data to 4Gvoid zdw_uart1_send_string(char* str){unsigned int k=0;do{usart_data_transmit(COM_4G_UART,(uint8_t *)(str + k));k++;} while(*(str + k)!='\0');}//Power :configure power GPIOvoid zdw_power_4G_gpio_config(void){/* enable the Power clock */rcu_periph_clock_enable(MCU_PWR_4G_GPIO_CLK);/* configure Power GPIO port */ gpio_mode_set(MCU_PWR_4G_GPIO_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE,MCU_PWR_4G_PIN);gpio_output_options_set(MCU_PWR_4G_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,MCU_PWR_4G_PIN);GPIO_BC(MCU_PWR_4G_GPIO_PORT) = MCU_PWR_4G_PIN;}//Power enable : 1secondvoid zdw_power_4G_enable_1s(void){GPIO_BOP(MCU_PWR_4G_GPIO_PORT) = MCU_PWR_4G_PIN;delay_1ms(1000);GPIO_BC(MCU_POWERON_MODULE_PORT) = MCU_POWERON_MODULE_PIN;}//PowerOn : GPIO configvoid zdw_poweron_4G_gpio_config(void){/* enable the Power clock */rcu_periph_clock_enable(MCU_POWERON_MODULE_CLK);/* configure Power GPIO port */ gpio_mode_set(MCU_POWERON_MODULE_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE,MCU_POWERON_MODULE_PIN);gpio_output_options_set(MCU_POWERON_MODULE_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,MCU_POWERON_MODULE_PIN);GPIO_BC(MCU_POWERON_MODULE_PORT) = MCU_POWERON_MODULE_PIN;}//PowerOn : void zdw_poweron_4G(void){GPIO_BOP(MCU_POWERON_MODULE_PORT) = MCU_POWERON_MODULE_PIN;}//4G model init :main usevoid zdw_4G_model_init(void){ //Powerzdw_power_4G_gpio_config();zdw_power_4G_enable_1s();delay_1ms(1000); //PowerOnzdw_poweron_4G_gpio_config();zdw_poweron_4G();//uart1 init:rx txgd_4G_uart_com_init();}

main.c

#include "main.h"#include "gd32f4xx.h"#include "systick.h"#include <stdio.h>#include "led.h"#include "uart_debug.h"#include "uart_4G.h"void zdw_bsp_init(){//LED gd_eval_led_init(LED1);gd_eval_led_init(LED2);//UART4 debuggd_eval_com_init(UART4);//4G model initzdw_4G_model_init();}int count_zdw = 0;int main(){systick_config(); zdw_bsp_init();printf("zhaodawei test begin!\n\n");while(1){//zdw_led_loop();}}

程序完成，运行，检测LED和串口能够正常运行。检测4G模块的灯闪烁（1秒闪一下有问题，2秒闪一下才正常通网）。

二、测试ML302能否正常连接TCP服务器 AT指令说明

中移物联官网下载资料：AT指令说明、mqtt协议用户手册

测试1：

我这里最后一个指令AT+CGATCT=1,1 回复失败，后来发现是SIM卡的问题

先使用AT+CEREG? 先查询驻网成功没有，驻网成功后才可以激活pdp.

这里的AT+CEREG? 结果是：0，2 （2说明网络不通，查AT指令手册分析结果）

显然我的SIM卡联网失败，换了张卡。

测试TCP连接：AT+MIPOPEN=1,"TCP","121.36.7.137",22

//这个IP和PORT是ubuntu的一个公网IP，可以用来测试。

三、使用MQTT协议连接阿里云物联网平台

查看ML302的mqtt用户手册：

按照手册，配置需要的AT指令：

1.AT+MQTTCFG 配置 MQTT 传输连接参数实例：AT+MQTTCFG="183.230.40.39",6002,"532337966",60,"246883","VACC79esEWuVK5j73b3cqWzrD7U=",0,””,0我的阿里云：AT+MQTTCFG="a1yhReNQYpD.iot-as--",1883,"zhaodawei|securemode=3,signmethod=hmacsha1|",60,"wifi_test&a1yhReNQYpD","3EA8327F255BDE5A280ECA0A2C7F9*********",0,"",02.AT+MQTTOPEN 设置 MQTT 相关连接标志并开始连接服务器。AT+MQTTOPEN=1,1,0,0,0, "",""我的阿里云：AT+MQTTOPEN=1,1,0,0,0, "",""查询 MQTT 连接状态： AT+MQTTSTAT?3.订阅、发布AT+MQTTSUB="dev/gsm/u",2 //示例我的阿里云：订阅AT+MQTTSUB="/a1yhReNQYpD/wifi_test/user/led",0AT+MQTTPUB="dev/gsm/u",2,0,0,"update message" //示例我的阿里云：发布AT+MQTTPUB="/a1yhReNQYpD/wifi_test/user/led",2,0,0,"LED is OFF!"4.关闭连接：断开 MQTT 连接 AT+MQTTDISC