确认输出端口状态

呼出为了确认输出端口的spc_request_dev函数

spc_request($sid, 4, $cmd);

$sid : slave ID
$cmd : 命令字符串

命令构造如下。

"get $port output"

$port : 输出端口的端口号码。可使用0~3四个端口号码。

返还值

正常的返还值如下。

返还值	说明
0	OFF
1	ON

例

<?php
include "/lib/sd_spc.php";
spc_reset();
spc_sync_baud();
$sid = 1;

echo "turn all output ports on\r\n";
spc_request_dev($sid, "set 0 output high");
spc_request_dev($sid, "set 1 output high");
spc_request_dev($sid, "set 2 output high");
spc_request_dev($sid, "set 3 output high");

// get status of output ports
echo "Port 0: ", spc_request_dev($sid, "get 0 output"), "\r\n";
echo "Port 1: ", spc_request_dev($sid, "get 1 output"), "\r\n";
echo "Port 2: ", spc_request_dev($sid, "get 2 output"), "\r\n";
echo "Port 3: ", spc_request_dev($sid, "get 3 output"), "\r\n";

sleep(1);

echo "turn all output ports off\r\n";
spc_request_dev($sid, "set 0 output low");
spc_request_dev($sid, "set 1 output low");
spc_request_dev($sid, "set 2 output low");
spc_request_dev($sid, "set 3 output low");

// get status of output ports
echo "Port 0: ", spc_request_dev($sid, "get 0 output"), "\r\n";
echo "Port 1: ", spc_request_dev($sid, "get 1 output"), "\r\n";
echo "Port 2: ", spc_request_dev($sid, "get 2 output"), "\r\n";
echo "Port 3: ", spc_request_dev($sid, "get 3 output"), "\r\n"
?>

输出结果

turn all output ports on
Port 0: 1
Port 1: 1
Port 2: 1
Port 3: 1
turn all output ports off
Port 0: 0
Port 1: 0
Port 2: 0
Port 3: 0

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