From fceba32a4198f67c7c69a4e9a2e07e490e40347d Mon Sep 17 00:00:00 2001
From: luokun <luokun@flexem.com>
Date: Mon, 26 Aug 2024 13:20:11 +0800
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---
 README.md           | 27 +++++++++++++++++++++++++++
 common/mbu-common.h |  2 +-
 2 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 9b0353c..2a05c59 100644
--- a/README.md
+++ b/README.md
@@ -42,6 +42,33 @@ gcc ./modbus_server/modbus_server.c -I./common -I./libmodbus/src/ -L./libmodbus/
 running
 =======
 
+
+# 静态编译modbuslib
+```
+cd libmodbus
+
+参考 MEADME
+
+./configure --enable-static
+make
+make insatll
+```
+
+# 设置动态搜索路径为当前运行目录
+```
+gcc ./modbus_client/modbus_client.c -I./common -I./libmodbus/src/ -L./libmodbus/src/.libs/ -lmodbus -Wl,-rpath,. -o mbClient
+
+gcc ./modbus_server/modbus_server.c -I./common -I./libmodbus/src/ -L./libmodbus/src/.libs/ -lmodbus -Wl,-rpath,. -o mbServer
+
+将libmodbus.so.5放入程序执行目录
+```
+
+# 编译静态链接库
+```
+gcc ./modbus_client/modbus_client.c -I ./common -I ./libmodbus/src -l:libmodbus.a -o modbus_client
+gcc ./modbus_server/modbus_server.c -I ./common -I ./libmodbus/src -l:libmodbus.a -o modbus_server
+```
+
 If modbus libraries are not in a default location (either it's needed to move libraries to app location or set
 appropriate environment variable):
 - on linux it would be:
diff --git a/common/mbu-common.h b/common/mbu-common.h
index cf43658..57afe43 100644
--- a/common/mbu-common.h
+++ b/common/mbu-common.h
@@ -79,7 +79,7 @@ int setRtuParam(void *backend, char c, char *value) {
     switch (c) {
     case 'b': {
         rtuParams->baud = getInt(value, &ok);
-        if (0 != ok) {
+        if (0 == ok) {
             printf("Baudrate is invalid %s", value);
             ok = 0;
         }