主循环状态机框架

[复制链接]

185|0

手机看帖

扫描二维码
随时随地手机跟帖

电梯直达

楼主

hubeiluhua| 初级技术员

楼主 | 2025-7-5 10:26 | 只看该作者回帖奖励

|倒序浏览 |阅读模式

机框, 状态机, ST, TI, sy, ni

volatile u32 sys_tick;
u32 last_time;

typedef enum {
ST_INIT,
ST_RUNNING,
ST_WAIT,
ST_ERROR
} SysState_t;

SysState_t sys_state = ST_INIT;

void SysTick_Handler(void) {
sys_tick++;
}

int main(void) {
u32 now_time;

while (1) {
      now_time = sys_tick;

      switch (sys_state) {
         case ST_INIT:
            // 初始化操作
            printf("System Init\n");
            sys_state = ST_RUNNING;
            last_time = now_time;
            break;

         case ST_RUNNING:
            if (now_time - last_time >= 1000) {  // 1秒逻辑
                  printf("Running...\n");
                  last_time = now_time;
                  sys_state = ST_WAIT;
            }
            break;

         case ST_WAIT:
            if (now_time - last_time >= 2000) {  // 等待2秒
                  printf("Back to Running\n");
                  last_time = now_time;
                  sys_state = ST_RUNNING;
            }
            break;

         case ST_ERROR:
            // 错误处理
            break;

         default:
            sys_state = ST_INIT;
            break;
      }
}
}

使用特权