复位模块

最新推荐文章于 2024-05-22 11:58:28 发布

zhimibuhui188

最新推荐文章于 2024-05-22 11:58:28 发布

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分类专栏： Android

本文链接：https://blog.youkuaiyun.com/zhimibuhui188/article/details/8197965

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本文深入探讨了AT指令中的复位模块，介绍如何使用ATReset()函数进行设备复位操作，包括其功能、应用场景及具体实施步骤。

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request reset modem

case RIL_REQUEST_RESET_RADIO:
	LOGD("got request RIL_REQUEST_RESET_RADIO");
#ifdef MODEM_RESET
        int type = ((int *)data)[0];
        LOGD("======Reset type = %d, data[0]=%d========", type, ((int *)data)[0]);
	ATReset(type);
#endif
	RIL_onRequestComplete(t, RIL_E_SUCCESS, NULL, 0);
	break;

ATReset():

/* Called on command or reader thread *
*   AT reset function:
*   resetType: 0 means normal reset
*                    1 means reset when AP sleep, this time just need colse tty nodes ,
*                         and reopen them, and kernel has created noded success.
*/
static void ATReset(int resetType)
{
    int fd = -1;
    ssize_t written;
    static int reset_num = 0;
	static int sleep_reset_num = 0;

	s_resetType = resetType;
	
	if(resetType == 0){
		reset_num++;
		LOGI("AT channel normal reset , s_resetting=%d, reset_num=%d\n", s_resetting, reset_num);
		
		if(s_closed == 1){
			LOGI("AT channel reset, but the ttynode is colsed, so nothing need to do\n");
			return;
		}
			
		s_resetting = 1;
			
		pthread_mutex_lock(&s_reset_mutex);
		pthread_cond_wait(&s_reset_cond, &s_reset_mutex);
		pthread_mutex_unlock(&s_reset_mutex);
		
		//may be need wait 2s
		modem_PowerOn();
		
		s_resetting = 0;
		
		pthread_mutex_lock(&s_state_mutex);
		pthread_cond_broadcast (&s_state_cond);
		pthread_mutex_unlock(&s_state_mutex);
		LOGI("*****completed reset operation,start to open tty node\n");
		write2Kernel("*****completed reset operation,start to open tty node\n");
		
	}else if(resetType == 1){
	    sleep_reset_num++;
		LOGI("AT channel AP sleep reset, s_resetting=%d, sleep_reset_num=%d\n", s_resetting, sleep_reset_num);
		RIL_requestTimedCallback(initializeCallback, NULL, &TIMEVAL_0);
	}
	

    return;
		
}