('clk_missed', 'Clock missed', (1,)),
('sig_missed', 'Signal missed', (2,)),
)
+ binary = (
+ ('ascii-float', 'Jitter values as newline-separated ASCII floats'),
+ )
def __init__(self, **kwargs):
self.state = 'CLK'
self.clk_edge = edge_detector[self.options['clk_polarity']]
self.sig_edge = edge_detector[self.options['sig_polarity']]
self.out_ann = self.register(srd.OUTPUT_ANN)
+ self.out_bin = self.register(srd.OUTPUT_BINARY)
self.out_clk_missed = self.register(srd.OUTPUT_META,
meta=(int, 'Clock missed', 'Clock transition missed'))
self.out_sig_missed = self.register(srd.OUTPUT_META,
def putx(self, delta):
# Adjust granularity.
if delta == 0 or delta >= 1:
- delta_s = u"%us" % (delta)
+ delta_s = "%.1fs" % (delta)
elif delta <= 1e-12:
- delta_s = u"%.1ffs" % (delta * 1e15)
+ delta_s = "%.1ffs" % (delta * 1e15)
elif delta <= 1e-9:
- delta_s = u"%.1fps" % (delta * 1e12)
+ delta_s = "%.1fps" % (delta * 1e12)
elif delta <= 1e-6:
- delta_s = u"%.1fns" % (delta * 1e9)
+ delta_s = "%.1fns" % (delta * 1e9)
elif delta <= 1e-3:
- delta_s = u"%.1fμs" % (delta * 1e6)
+ delta_s = "%.1fμs" % (delta * 1e6)
else:
- delta_s = u"%.1fms" % (delta * 1e3)
+ delta_s = "%.1fms" % (delta * 1e3)
self.put(self.clk_start, self.sig_start, self.out_ann, [0, [delta_s]])
+ # Helper function for ASCII float jitter values (one value per line).
+ def putb(self, delta):
+ if delta is None:
+ return
+ # Format the delta to an ASCII float value terminated by a newline.
+ x = str(delta) + '\n'
+ self.put(self.clk_start, self.sig_start, self.out_bin,
+ (0, x.encode('UTF-8')))
+
# Helper function for missed clock and signal annotations.
def putm(self, data):
self.put(self.samplenum, self.samplenum, self.out_ann, data)
self.sig_start = self.samplenum
self.state = 'CLK'
# Calculate and report the timing jitter.
- self.putx((self.sig_start - self.clk_start) / self.samplerate)
+ delta = (self.sig_start - self.clk_start) / self.samplerate
+ self.putx(delta)
+ self.putb(delta)
return False
else:
if self.clk_start != self.samplenum \