libaltos: Retry Windows serial port open five times

[fw/altos] / libaltos / libaltos.c

diff --git a/libaltos/libaltos.c b/libaltos/libaltos.c
index 2a41ef80159e1813f7573672fe049a69d1c78a65..ad03e638e2a4937e0c7bd913afef88e8fcb862f9 100644 (file)
--- a/libaltos/libaltos.c
+++ b/libaltos/libaltos.c
@@ -1319,6 +1319,7 @@ altos_open(struct altos_device *device)
        struct altos_file       *file = calloc (1, sizeof (struct altos_file));
        char    full_name[64];
        COMMTIMEOUTS timeouts;
+       int i;
 
        if (!file)
                return NULL;
@@ -1326,7 +1327,15 @@ altos_open(struct altos_device *device)
        strcpy(full_name, "\\\\.\\");
        strcat(full_name, device->path);
 
-       file->handle = open_serial(full_name);
+       file->handle = INVALID_HANDLE_VALUE;
+
+       for (i = 0; i < 5; i++) {
+               file->handle = open_serial(full_name);
+               if (file->handle != INVALID_HANDLE_VALUE)
+                       break;
+               Sleep(100);
+       }
+       
        if (file->handle == INVALID_HANDLE_VALUE) {
                free(file);
                return NULL;