DATA_SEG struct PLC_MACHINE plc_state; struct PLC_STATE { u8 cur_state; u8 next_state; u8(*action) (u8 init, void *args); }; struct PLC_MACHINE { u8 init; u8 trycnt; u8 wait_t; struct PLC_STATE *pstate; }; memset(&plc_state, 0, sizeof(plc_state));置0为PLC_MACHINE下的所有参数为零，如init为0；trycnt 为0 ；wait_t为0； u8(*action) (u8 init, void *args);这是这个函数里面的init 也为0； chg_state(RST_PLC);在初始化的时候写这个函数就是从状态机的这个位置开始运行。const struct PLC_STATE plc_state_slot[] = { {RST_PLC, R_EID, reset_plc}, {R_EID, S_AID, rd_plc_eid}, {S_AID, UNLINK2, wr_plc_aid}, {UNLINK2, WAIT, set_unlink}, {WAIT, S_PWDREG, wait_sec}, {S_PWDREG, S_PANID, set_register}, {S_PANID, _END, wr_plc_panid}, #if KEY_REG {UNLINK1, S_REG, set_unlink}, #endif {G_GWID, S_REG, rd_gw_aid}, {S_REG, G_SID, set_register}, {G_SID, _END, rd_plc_sid}, {_END, _END, frame_handle}, };
static u8 reset_plc(u8 init, void *args) { if (init) {//上电init为零就不用复位载波模块了。 SET_PIN_L(PLC_RESET_PORT, PLC_RESET_PIN); return 0; } if (plc_state.wait_t >= MIN_PLC_RUN) { next_state(); } else if (plc_state.wait_t >= 1) { SET_PIN_H(PLC_RESET_PORT, PLC_RESET_PIN); } return 0; }