spc_request($sid, 4, $cmd);
命令构造如下。
"get $port input"
正常的返还值如下。
"200,$state"
<?php
include "/lib/sd_spc.php";
spc_reset();
spc_sync_baud(115200);
$sid = 1;
// get status of input ports
echo "Port 0: ", spc_request($sid, 4, "get 0 input"), "\r\n";
echo "Port 1: ", spc_request($sid, 4, "get 1 input"), "\r\n";
echo "Port 2: ", spc_request($sid, 4, "get 2 input"), "\r\n";
echo "Port 3: ", spc_request($sid, 4, "get 3 input"), "\r\n";
/*
output example
Port 0: 200,0
Port 1: 200,1
Port 2: 200,1
Port 3: 200,0
*/
?>