FSM有限状态机模拟例程

#include "fsm.h" #include <stdio.h> //事件回调函数 void nsd_forword_callback(void) { printf("[FSM]: nsd_forword_callback\n"); } void nsd_reversal_callback(void) { printf("[FSM]: nsd_reversal_callback\n"); } void nsd_forword_stop_callback(void) { printf("[FSM]: nsd_forword_stop_callback\n"); fsm.curstate = STATE_IDLE; } void nsd_reversal_stop_callback(void) { printf("[FSM]: nsd_reversal_stop_callback\n"); fsm.curstate = STATE_IDLE; } STATE_TABLE fsm_table[] = { /*当前状态 事件 下一状态 回调函数*/ {STATE_IDLE, EVENT_NSD_FORWORD, STATE_NSD_FORWORD, nsd_forword_callback}, {STATE_NSD_FORWORD, EVENT_KEY_DOWN, STATE_NSD_FORWORD_STOP, nsd_forword_stop_callback}, {STATE_NSD_FORWORD, EVENT_KEY_DOWN6, STATE_NSD_FORWORD_STOP, nsd_forword_stop_callback}, {STATE_IDLE, EVENT_NSD_REVERSAL, STATE_NSD_REVERSAL, nsd_reversal_callback}, {STATE_NSD_REVERSAL, EVENT_KEY_DOWN, STATE_NSD_REVERSAL_STOP, nsd_reversal_stop_callback}, {STATE_NSD_REVERSAL, EVENT_KEY_DOWN6, STATE_NSD_REVERSAL_STOP, nsd_reversal_stop_callback}, }; //注册状态机 FSM fsm = { .curstate = STATE_IDLE, .table_size = sizeof(fsm_table) / sizeof(STATE_TABLE), .table = fsm_table }; //状态迁移 void fsm_state_transfer(int state) { fsm.curstate = (STATE)state; } //获取当前状态 int fsm_state_get() { return fsm.curstate; } //事件处理 void fsm_event_handle(int event) { STATE_TABLE *pActionTable = fsm.table; void (*pActionFun)() = NULL; //获取当前动作函数 for (int i = 0; i <= fsm.table_size; i++) { if (event == pActionTable[i].event && fsm.curstate == pActionTable[i].cur_state) { pActionFun = pActionTable[i].event_cb; if (pActionFun) { pActionFun(); } fsm_state_transfer(pActionTable[i].next_state); } } } //事件更新 void fsm_event_update(int event) { fsm_event_handle(event); }