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-rw-r--r--serial.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/serial.c b/serial.c
index 7e47dcc9..9446ce31 100644
--- a/serial.c
+++ b/serial.c
@@ -262,6 +262,7 @@ int serialport_write(unsigned char *buf, unsigned int writecnt)
#else
ssize_t tmp = 0;
#endif
+ unsigned int empty_writes = 250; /* results in a ca. 125ms timeout */
while (writecnt > 0) {
#ifdef _WIN32
@@ -273,9 +274,16 @@ int serialport_write(unsigned char *buf, unsigned int writecnt)
msg_perr("Serial port write error!\n");
return 1;
}
- if (!tmp)
- msg_pdbg("Empty write\n");
- writecnt -= tmp;
+ if (!tmp) {
+ msg_pdbg2("Empty write\n");
+ empty_writes--;
+ programmer_delay(500);
+ if (empty_writes == 0) {
+ msg_perr("Serial port is unresponsive!\n");
+ return 1;
+ }
+ }
+ writecnt -= tmp;
buf += tmp;
}