hantek-dso: fix 100MS/s

Do not downsample at 100MS/s.
The device actually sampled at (100.0/0x1000)MS/s when 100MS/s was set.

diff --git a/src/hardware/hantek-dso/protocol.c b/src/hardware/hantek-dso/protocol.c
index c74187ada435f2441e7aa3b88ed926194c9d530b..d2101f2a8170c892af1311c7a0e12f482aa3d84e 100644 (file)
--- a/src/hardware/hantek-dso/protocol.c
+++ b/src/hardware/hantek-dso/protocol.c
@@ -326,7 +326,8 @@ static int dso2250_set_trigger_samplerate(const struct sr_dev_inst *sdi)
        }
 
        tmp = base / devc->samplerate;
        }
 
        tmp = base / devc->samplerate;

-       if (tmp) {
+       /* Downsample only if really necessary */
+       if (tmp > 1) {

                /* Downsampling on */
                cmdstring[2] |= 2;
                /* Downsampler = 1comp((Base / Samplerate) - 2)
                /* Downsampling on */
                cmdstring[2] |= 2;
                /* Downsampler = 1comp((Base / Samplerate) - 2)