serial-lcr: also request packets before initial state retrieval

[libsigrok.git] / src / hardware / serial-lcr / api.c

diff --git a/src/hardware/serial-lcr/api.c b/src/hardware/serial-lcr/api.c
index 50b3f49361ef3db95334f62d6c8ca65796e87e77..035d1b506329159df4ca1cf20facc3d57016f7a0 100644 (file)
--- a/src/hardware/serial-lcr/api.c
+++ b/src/hardware/serial-lcr/api.c
@@ -177,6 +177,15 @@ static int read_lcr_port(struct sr_dev_inst *sdi,
        uint8_t buf[128];
        int ret;
 
+       serial_flush(serial);
+       if (lcr->packet_request) {
+               ret = lcr->packet_request(serial);
+               if (ret < 0) {
+                       sr_err("Failed to request packet: %d.", ret);
+                       return ret;
+               }
+       }
+
        /*
         * Receive a few more packets (and process them!) to have the
         * current output frequency and circuit model parameter values
@@ -190,7 +199,7 @@ static int read_lcr_port(struct sr_dev_inst *sdi,
        len = sizeof(buf);
        scan_packet_check_setup(sdi);
        ret = serial_stream_detect(serial, buf, &len,
-               lcr->packet_size, scan_packet_check_func, 1000);
+               lcr->packet_size, scan_packet_check_func, 1500);
        scan_packet_check_setup(NULL);
 
        return ret;