一、平台准备
1、登录https://bemfa.com/注册个用户
系统会分配个私钥
2、选择MQTT设备云
3、新建主题
主题名：AIWB2002，后3位002，表示设备为灯
| 后三位 |
说明 |
| 001 |
插座设备 |
| 002 |
灯泡设备 |
| 003 |
风扇设备 |
| 004 |
传感器 |
| 005 |
空调设备 |
| 006 |
开关设备 |
| 009 |
窗帘设备 |
| 010 |
温控器 |
| 011 |
热水器 |
| 012 |
电视 |
| 013 |
空气净化器 |
二、修改程序
以applications/protocols/mqtt/tcp为模板
1、main.c
#define ROUTER_SSID "SSID"
#define ROUTER_PWD "PWD"
修改WIFI登录SSID和密码
2、demo.c
void mqtt_start(void)
{
pwm_led_init();//pwm 初始化
axk_mqtt_client_config_t mqtt_cfg = {
.uri = "mqtt://bemfa.com",//巴法云地址
.port = 9501,//巴法云端口9501，不是1883
.client_id = "平台提供的私钥",
.event_handle = event_cb,//回调
};
axk_mqtt_client_handle_t client = axk_mqtt_client_init(&mqtt_cfg);
axk_mqtt_client_start(client);
}
event_cb函数
static axk_err_t event_cb(axk_mqtt_event_handle_t event)
{
...
case MQTT_EVENT_CONNECTED://MQTT建立连接事件
blog_info("MQTT_EVENT_CONNECTED");
// 订阅主题（如 light001）
axk_mqtt_client_subscribe(client, "AIWB2002", 0);//订阅前面注册的AIWB2002主题
break;
case MQTT_EVENT_DATA://MQTT接收数据事件
blog_info("MQTT_EVENT_DATA");
printf("TOPIC=%.*s\r\n", event->topic_len, event->topic);
printf("DATA=%.*s\r\n", event->data_len, event->data);
// 判断指令并控制 GPIO
if (strncmp(event->data, "on#", 3) == 0) {//收到on#44,设置LED亮度为44
// 2. 提取亮度值（如 "44"）
char brightness_str[4] = {0};
int brightness = 0;
strncpy(brightness_str, event->data + 3, event->data_len - 3);
brightness = atoi(brightness_str); // 字符串转整数
// 3. 限制亮度范围（0~255)
if (brightness < 0) brightness = 0;
if (brightness > 255) brightness = 255;
rgb_control(255,255,255,brightness);
}else if (strncmp(event->data, "on", event->data_len) == 0) {//收到on,设置LED亮度为255
blog_info("Turn ON LED");
rgb_control(255,255,255,255);
} // 处理关闭指令（如 "off"）
else if (strncmp(event->data, "off", event->data_len) == 0) {//收到off,设置LED亮度为0
rgb_control(255,255,255,0);
blog_info("Turn OFF LED");
}
break;
...
}
pwmled.c
#include <FreeRTOS.h>
#include <task.h>
#include <blog.h>
#include <bl602.h>
#include <bl602_gpio.h>
#include <bl602_glb.h>
#include <bl_pwm.h>
#include "pwmled.h"
#define PWM_Get_Channel_Reg(ch) (PWM_BASE+PWM_CHANNEL_OFFSET+(ch)*0x20)
#define PWM_STOP_TIMEOUT_COUNT (160*1000)
GLB_GPIO_Cfg_Type cfg[3] = {
{
.drive = 0,
.smtCtrl = 1,
.gpioMode = GPIO_MODE_OUTPUT,
.pullType = GPIO_PULL_DOWN,
.gpioPin = 14, /// red
.gpioFun = 8,
},
{
.drive = 0,
.smtCtrl = 1,
.gpioMode = GPIO_MODE_OUTPUT,
.pullType = GPIO_PULL_DOWN,
.gpioPin = 17, /// green
.gpioFun = 8,
},
{
.drive = 0,
.smtCtrl = 1,
.gpioMode = GPIO_MODE_OUTPUT,
.pullType = GPIO_PULL_DOWN,
.gpioPin = 3, /// blue
.gpioFun = 8,
},
};
/// @brief Copy from PWM_Smart_Configure. Use Bus Clock instead of External Crystal Clock for PWM Timer
/// @param ch PWM Channel
/// @param clkDiv PWM clock divider
/// @param period PWM period
/// @param threshold2
/// @return
BL_Err_Type PWM_Smart_Configure2(PWM_CH_ID_Type ch, uint16_t clkDiv, uint16_t period,uint16_t threshold2)
{
uint32_t tmpVal;
uint32_t timeoutCnt = PWM_STOP_TIMEOUT_COUNT;
/* Get channel register */
uint32_t PWMx = PWM_Get_Channel_Reg(ch);
tmpVal = BL_RD_REG(PWMx, PWM_CONFIG);
// if(BL_GET_REG_BITS_VAL(tmpVal, PWM_REG_CLK_SEL) != PWM_CLK_XCLK){
if(BL_GET_REG_BITS_VAL(tmpVal, PWM_REG_CLK_SEL) != PWM_CLK_BCLK){
BL_WR_REG(PWMx, PWM_CONFIG, BL_SET_REG_BIT(tmpVal, PWM_STOP_EN));
while(!BL_IS_REG_BIT_SET(BL_RD_REG(PWMx, PWM_CONFIG), PWM_STS_TOP)){
timeoutCnt--;
if(timeoutCnt == 0){
return TIMEOUT;
}
}
// tmpVal = BL_SET_REG_BITS_VAL(tmpVal, PWM_REG_CLK_SEL, PWM_CLK_XCLK);
tmpVal = BL_SET_REG_BITS_VAL(tmpVal, PWM_REG_CLK_SEL, PWM_CLK_BCLK);
}
tmpVal = BL_SET_REG_BITS_VAL(tmpVal, PWM_OUT_INV, PWM_POL_NORMAL);
tmpVal = BL_SET_REG_BITS_VAL(tmpVal, PWM_STOP_MODE, PWM_STOP_GRACEFUL);
BL_WR_REG(PWMx, PWM_CONFIG, tmpVal);
/* Config pwm division */
BL_WR_REG(PWMx, PWM_CLKDIV, clkDiv);
/* Config pwm period and duty */
BL_WR_REG(PWMx, PWM_PERIOD, period);
BL_WR_REG(PWMx, PWM_THRE1, 0);
BL_WR_REG(PWMx, PWM_THRE2, threshold2);
return SUCCESS;
}
void pwm_led_init(void)
{
for (int i = 0; i < 3; i++) {
GLB_GPIO_Init(cfg + i);
PWM_CH_ID_Type ch = cfg[i].gpioPin % PWM_CH_MAX;
PWM_Channel_Disable(ch);
}
}
void pwm_led_set(uint8_t red,uint8_t green,uint8_t blue)
{
PWM_Smart_Configure2(2, 80, 255, green);
PWM_Channel_Enable(2);
PWM_Smart_Configure2(3, 80, 255, blue);
PWM_Channel_Enable(3);
PWM_Smart_Configure2(4, 80, 255, red);
PWM_Channel_Enable(4);
}
void rgb_control(uint8_t red, uint8_t green, uint8_t blue, uint8_t alpha)
{
uint8_t t_red,t_green,t_blue;
// 应用透明度/亮度
t_red = red*alpha/255;
t_green = green*alpha/255;
t_blue = blue*alpha/255;
pwm_led_set(t_red,t_green,t_blue);
}
三、运行
巴法云小程序
MQTTX调试
