Without the cast non integer frequencies weren't possible (e.g. with a sampling frequency of 50Hz we would end up with a signal frequency of 2Hz instead of 2.5Hz). The result were signals which had an incorrect number of samples per period.
BugLink: http://sigrok.org/bugzilla/show_bug.cgi?id=297 --- hardware/demo/demo.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/hardware/demo/demo.c b/hardware/demo/demo.c index 3d59ae5..433f352 100644 --- a/hardware/demo/demo.c +++ b/hardware/demo/demo.c @@ -206,7 +206,7 @@ static void generate_analog_pattern(const struct sr_probe_group *probe_group, ui break; case PATTERN_SINE: - frequency = sample_rate / ANALOG_SAMPLES_PER_PERIOD; + frequency = (double) sample_rate / ANALOG_SAMPLES_PER_PERIOD; /* Make sure the number of samples we put out is an integer * multiple of our period size */ @@ -225,7 +225,7 @@ static void generate_analog_pattern(const struct sr_probe_group *probe_group, ui break; case PATTERN_TRIANGLE: - frequency = sample_rate / ANALOG_SAMPLES_PER_PERIOD; + frequency = (double) sample_rate / ANALOG_SAMPLES_PER_PERIOD; while (num_samples % ANALOG_SAMPLES_PER_PERIOD != 0) num_samples--; @@ -240,7 +240,7 @@ static void generate_analog_pattern(const struct sr_probe_group *probe_group, ui break; case PATTERN_SAWTOOTH: - frequency = sample_rate / ANALOG_SAMPLES_PER_PERIOD; + frequency = (double) sample_rate / ANALOG_SAMPLES_PER_PERIOD; while (num_samples % ANALOG_SAMPLES_PER_PERIOD != 0) num_samples--; -- 1.8.5.3 ------------------------------------------------------------------------------ CenturyLink Cloud: The Leader in Enterprise Cloud Services. Learn Why More Businesses Are Choosing CenturyLink Cloud For Critical Workloads, Development Environments & Everything In Between. Get a Quote or Start a Free Trial Today. http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk _______________________________________________ sigrok-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/sigrok-devel
