From be40c6bbad18cee0444c50069d98967cd26b6c3b Mon Sep 17 00:00:00 2001
From: zhangqian <zhangqian@123.com>
Date: 星期二, 19 十二月 2023 20:10:24 +0800
Subject: [PATCH] plc读写参数调整，读写方式调整
---
pkg/plc/modbusx/modbus.go | 36 ++++++++++++++++++++++++++++--------
1 files changed, 28 insertions(+), 8 deletions(-)
diff --git a/pkg/plc/modbusx/modbus.go b/pkg/plc/modbusx/modbus.go
index 1a779c3..3040c81 100644
--- a/pkg/plc/modbusx/modbus.go
+++ b/pkg/plc/modbusx/modbus.go
@@ -17,23 +17,43 @@
return
}
-func Write(ipAddr string, address uint16, value int) (err error) {
+func Write(ipAddr string, address uint16, value int, endian string, length int) (err error) {
address--
var bytesVal []byte
- bytesVal = intToBytes(value)
+ bytesVal = intToBytes(value, endian, length)
cli := getModbusConnection(ipAddr)
_, err = cli.WriteMultipleRegisters(address, uint16(len(bytesVal)), bytesVal)
dealErr(err, ipAddr)
return err
}
-func intToBytes(value int) (data []byte) {
- if value <= 1<<16 {
- data = make([]byte, 2)
- binary.BigEndian.PutUint16(data, uint16(value))
+func intToBytes(value int, endian string, length int) (data []byte) {
+ if endian == "mix" {
+ data = make([]byte, 0, 4)
+ highVal := value / (1 << 16)
+ highBts := make([]byte, 2)
+ binary.BigEndian.PutUint16(highBts, uint16(highVal))
+ lowValue := value % (1 << 16)
+ lowBts := make([]byte, 2)
+ binary.BigEndian.PutUint16(lowBts, uint16(lowValue))
+ data = append(data, lowBts...)
+ data = append(data, highBts...)
} else {
- data = make([]byte, 4)
- binary.BigEndian.PutUint32(data, uint32(value))
+ if length == 1 {
+ data = make([]byte, 2)
+ if endian == "big" {
+ binary.BigEndian.PutUint16(data, uint16(value))
+ } else {
+ binary.LittleEndian.PutUint16(data, uint16(value))
+ }
+ } else {
+ data = make([]byte, 4)
+ if endian == "big" {
+ binary.BigEndian.PutUint32(data, uint32(value))
+ } else {
+ binary.LittleEndian.PutUint32(data, uint32(value))
+ }
+ }
}
return
}
--
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