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同步操作将从 不败少龙/modbus-tcp-client 强制同步,此操作会覆盖自 Fork 仓库以来所做的任何修改,且无法恢复!!!
确定后同步将在后台操作,完成时将刷新页面,请耐心等待。
<?php
declare(strict_types=1);
namespace ModbusTcpClient\Packet\ModbusFunction;
use ModbusTcpClient\Exception\InvalidArgumentException;
use ModbusTcpClient\Packet\ErrorResponse;
use ModbusTcpClient\Packet\ModbusApplicationHeader;
use ModbusTcpClient\Packet\ModbusPacket;
use ModbusTcpClient\Packet\ModbusRequest;
use ModbusTcpClient\Packet\ProtocolDataUnitRequest;
use ModbusTcpClient\Utils\Types;
/**
* Request for Write Multiple Coils (FC=15)
*
* Example packet: \x01\x38\x00\x00\x00\x08\x11\x0F\x04\x10\x00\x03\x01\x05
* \x01\x38 - transaction id
* \x00\x00 - protocol id
* \x00\x08 - number of bytes in the message (PDU = ProtocolDataUnit) to follow
* \x11 - unit id
* \x0F - function code
* \x04\x10 - start address
* \x00\x03 - count of coils to write
* \x01 - coils byte count
* \x05 - coils data
*
*/
class WriteMultipleCoilsRequest extends ProtocolDataUnitRequest implements ModbusRequest
{
/**
* @var bool[] coils (array of booleans)
*/
private array $coils;
private int $coilCount;
private int $coilBytesSize;
/**
* @param int $startAddress
* @param bool[] $coils
* @param int $unitId
* @param int|null $transactionId
*/
public function __construct(int $startAddress, array $coils, int $unitId = 0, int $transactionId = null)
{
$this->coils = $coils;
$this->coilCount = count($this->coils);
$this->coilBytesSize = (int)(($this->coilCount + 7) / 8);
parent::__construct($startAddress, $unitId, $transactionId);
$this->validate();
}
public function validate(): void
{
parent::validate();
if ($this->coilCount === 0 || $this->coilCount > 2048) {
throw new InvalidArgumentException("coils count out of range (1-2048): {$this->coilCount}", 3);
}
}
public function getFunctionCode(): int
{
return ModbusPacket::WRITE_MULTIPLE_COILS;
}
public function __toString(): string
{
return parent::__toString()
. Types::toRegister($this->coilCount)
. Types::toByte($this->coilBytesSize)
. Types::byteArrayToByte(Types::booleanArrayToByteArray($this->coils));
}
/**
* @return bool[]
*/
public function getCoils(): array
{
return $this->coils;
}
protected function getLengthInternal(): int
{
return parent::getLengthInternal() + (3 + $this->coilBytesSize); // coilCount + coilBytesSize + number of bytes coils need for data
}
/**
* Parses binary string to WriteMultipleCoilsRequest or return ErrorResponse on failure
*
* @param string $binaryString
* @return WriteMultipleCoilsRequest|ErrorResponse
*/
public static function parse(string $binaryString): ErrorResponse|WriteMultipleCoilsRequest
{
return self::parseStartAddressPacket(
$binaryString,
14,
ModbusPacket::WRITE_MULTIPLE_COILS,
function (int $transactionId, int $unitId, int $startAddress) use ($binaryString) {
$quantity = Types::parseUInt16($binaryString[10] . $binaryString[11]);
$byteCount = Types::parseByte($binaryString[12]);
$coils = Types::binaryStringToBooleanArray(substr($binaryString, 13, $byteCount));
if ($quantity > count($coils)) {
return new ErrorResponse(
new ModbusApplicationHeader(2, $unitId, $transactionId),
ModbusPacket::WRITE_MULTIPLE_COILS,
3 // Illegal data value
);
}
$coils = array_slice($coils, 0, $quantity);
return new self($startAddress, $coils, $unitId, $transactionId);
}
);
}
}
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