fixed some modbus bugs

MK16kawai · MK16kawai · commit fe7ff536adef · 2025-01-06T18:06:30.000+08:00
diff --git a/components/comm/src/maix_modbus.cpp b/components/comm/src/maix_modbus.cpp
@@ -293,7 +293,7 @@ Slave::~Slave()
 ::maix::err::Err Slave::__receive__()
 {
     this->rc_ = ::modbus_receive(this->ctx_.get(), this->query_);
-    if (this->rc_ >= 0) {
+    if (this->rc_ > 0) {
         if (this->debug_) {
             log::info("%s receive, len: %d", this->TAG().c_str(), this->rc_);
         }

Original file line number	Diff line number	Diff line change
`@@ -293,7 +293,7 @@ Slave::~Slave()`
`293`	`293`	`::maix::err::Err Slave::__receive__()`
`294`	`294`	`{`
`295`	`295`	`this->rc_ = ::modbus_receive(this->ctx_.get(), this->query_);`
`296`		`- if (this->rc_ >= 0) {`
	`296`	`+ if (this->rc_ > 0) {`
`297`	`297`	`if (this->debug_) {`
`298`	`298`	`log::info("%s receive, len: %d", this->TAG().c_str(), this->rc_);`
`299`	`299`	`}`