AP_EFI: fixed bug in Lutan driver

we need to send an initial request pkt if no data from Lutan
3 years ago · d85fe81537
1 changed files with 3 additions and 3 deletions
--- a/libraries/AP_EFI/AP_EFI_Serial_Lutan.cpp
+++ b/libraries/AP_EFI/AP_EFI_Serial_Lutan.cpp
@ -53,9 +53,9 @@ void AP_EFI_Serial_Lutan::update()
				@@ -53,9 +53,9 @@ void AP_EFI_Serial_Lutan::update()
    if (n + pkt_nbytes > sizeof(pkt)) {
        pkt_nbytes = 0;
    }
-    const ssize_t nread = port->read(&pkt[pkt_nbytes], n);
-    if (nread <= 0) {
-        return;
+    ssize_t nread = port->read(&pkt[pkt_nbytes], n);
+    if (nread < 0) {
+        nread = 0;
    }
    pkt_nbytes += nread;
    if (pkt_nbytes > 2) {