STM32发展简介 - STM32 简介

LittleFS在STM32中的应用

针对SPI Flash（如W25Q64）实现配置参数持久化存储：

static struct lfs_config cfg = {
    .read = spi_flash_read,
    .prog = spi_flash_prog,
    .erase = spi_flash_erase,
    .sync = spi_flash_sync,
    .read_size = 256,
    .prog_size = 256,
    .block_size = 4096,
    .block_count = 128,
    .cache_size = 256,
    .lookahead_size = 32,
    .block_cycles = 100,
};
int main(void)
{
    int err;
    struct lfs lfs;
    
    err = lfs_format(&lfs, &cfg);
    if (err != 0) {
        printf("Format failed: %dn", err);
    }
    
    err = lfs_mount(&lfs, &cfg);
    if (err != 0) {
        printf("Mount failed: %dn", err);
    }
    
    FILE fp = fopen("/config.ini", "w");
    fprintf(fp, "baudrate=%dn", 115200);
    fprintf(fp, "led_blink_ms=%dn", 500);
    fclose(fp);
    
    fp = fopen("/config.ini", "r");
    char line[64];
    while (fgets(line, sizeof(line), fp)) {
        printf("%s", line);
    }
    fclose(fp);
    lfs_unmount(&lfs);
}

lvgl图形界面开发实例

在STM32F746 Discovery板上实现触摸按钮与温度显示：

static void btn_event_cb(lv_obj_t btn, lv_event_t event)
{
    if (event == LV_EVENT_CLICKED) {
        printf("Button pressed!n");
        
        HAL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);
    }
}
int main(void)
{
    lv_init();
    tft_init();
    touch_init();
    
    lv_obj_t scr = lv_scr_act();
    
    lv_obj_t btn = lv_btn_create(scr, NULL);
    lv_obj_set_size(btn, 120, 60);
    lv_obj_set_pos(btn, 40, 40);
    lv_obj_set_event_cb(btn, btn_event_cb);
    
    lv_obj_t label = lv_label_create(btn, NULL);
    lv_label_set_text(label, "Toggle LED");
    
    lv_obj_t temp_label = lv_label_create(scr, NULL);
    lv_label_set_text(temp_label, "Temp: --°C");
    lv_obj_align(temp_label, btn, LV_ALIGN_OUT_BOTTOM_MID, 0, 20);
    for (;;) {
        
        float temp = read_temperature();
        char buf[32];
        snprintf(buf, sizeof(buf), "Temp: %.1f°C", temp);
        lv_label_set_text(temp_label, buf);
        lv_task_handler();
        HAL_Delay(50);
    }
}

STM32F407（Cortex-M4）性能增强点

const struct performance_improvements {
    float clock_ratio;         
    float fpu_speedup;         
    float dsp_speedup;         
    float code_density;       
    float power_efficiency;   
} f4_improvements = {
    .clock_ratio = 2.33f,
    .fpu_speedup = 20.5f,
    .dsp_speedup = 5.2f,
    .code_density = 0.75f,
    .power_efficiency = 0.6f
};

STM32H743（Cortex-M7）系统架构突破

typedef struct {
    uint32_t core_freq;          
    uint32_t flash_latency;      
    uint32_t dcache_size;        
    uint32_t acclerator_units;   
    uint32_t bus_matrix;         
    uint32_t power_domains;      
} h7_architecture;
const h7_architecture h743 = {
    .core_freq = 400000000,
    .flash_latency = 255,
    .dcache_size = 262144,
    .acclerator_units = 2,
    .bus_matrix = 8,
    .power_domains = 4
};

OpenOCD开源调试方案

# 安装OpenOCD
sudo apt-get install openocd
# 启动调试服务器
openocd -f interface/stlink-v2.cfg -f target/stm32f4x.cfg
# 在另一个终端启动GDB
arm-none-eabi-gdb program.elf
(gdb) target remote :3333
(gdb) load
(gdb) break main
(gdb) continue

J-Link高级调试功能

# 启动J-Link GDB Server
JLinkGDBServer -device STM32H743VI -if SWD -speed 4000
# 连接并调试
(gdb) target remote localhost:2331
(gdb) monitor flash device = STM32H743VI
(gdb) monitor loadfile firmware.bin
(gdb) monitor reset
(gdb) b main
(gdb) c

基于STM32的LoRa长距离终端

硬件平台：STM32L072 + SX1276

• 传输距离：城市3km，郊区15km
• 数据速率：0.3-50kbps
• 功耗：接收10.3mA，发射120mA
• 应用场景：农业土壤监测、智能水表

void lora_send_data(uint8_t data, uint8_t len)
{
    uint8_t payload[64];
    memcpy(payload, data, len);
    SX1276Send(payload, len);
    printf("Sent %d bytes via LoRan", len);
}

void periodic_send(void)
{
    float temp = read_temperature();
    float humi = read_humidity();
    uint8_t buffer[8];
    uint16_t temp_int = (uint16_t)(temp  100);
    uint16_t humi_int = (uint16_t)(humi  100);
    buffer[0] = temp_int >> 8;
    buffer[1] = temp_int & 0xFF;
    buffer[2] = humi_int >> 8;
    buffer[3] = humi_int & 0xFF;
    lora_send_data(buffer, 4);
}

基于STM32的蓝牙Mesh网络

硬件平台：STM32WLE5 + NORDIC nRF52832（网关）

• 拓扑：多对多Mesh网络
• 节点数：最大32768个
• 功能：照明控制、传感器网络
• 功耗：广播模式2.1mA

void mesh_init()
{
    mesh_init(NULL, NULL, NULL);
    mesh_prov_init(NULL);
    mesh_model_init();
    
    mesh_model_add(NULL, NULL, NULL);
    printf("Bluetooth Mesh node initializedn");
}

void button_event(uint8_t button_id, bool pressed)
{
    if (pressed) {
        uint8_t onoff = 1;
        mesh_model_publish(NULL, NULL, &onoff, 1);
    }
}

技术博客精选

• STM32F4低功耗设计详解（EEWorld）：深入分析Stop/Standby模式切换
• STM32H7高速ADC配置（电子工程世界）：16通道同步采样方案
• STM32安全启动实现（知乎专栏）：基于TrustZone-M的完整流程
• STM32与Linux双核通信（CSDN）：MCU+APM通信机制解析

开源硬件项目

• Blue Pill：基于STM32F103的开源开发板，社区支持强大
• Black Pill：基于STM32F401，性价比极高
• STM32MP157C-DK2：双核MPU开发板，支持Linux+RTOS
• STM32H743I-DISCO：官方开发板，集成LCD与陀螺仪