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ubb-patgen/timeline.fig: timeline of pattern generation (description in README)
This commit is contained in:
Werner Almesberger
parent
8dda1200c1
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a31351545c
@ -172,3 +172,47 @@ The trigger signal can be debounced with the option -d, e.g.,
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This accepts the trigger only after it has been zero for at least
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100 microseconds. If the trigger is a sequence, debouncing is
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applied at each step.
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Timeline details
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----------------
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timing.fig illustrates the various steps of pattern generation.
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A PDF of the diagram can be found here:
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http://downloads.qi-hardware.com/people/werner/ubb/patgen/timeline.pdf
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CLK is the clock output if selected with -C. DATx are the data
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lines, with the value of DAT0 shown. TRIG is the trigger input.
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Note that in real life, the TRIG/CLK line can only act either as
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trigger input or as clock output but not as both at the same time.
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The pattern we send is 0110110. We trigger on TRIG being low, with
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a debounce time of nominally about one pattern clock interval, and
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some post-trigger delay.
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After ubb-patgen starts, it first processes the command-line
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options and arguments, then initializes the pins. DATx are set to
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the value of the first pattern. Next, ubb-patgen sets up the MMC
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controller, makes it send a command, receives a pseudo-response,
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and begins sending copies of the first pattern on DATx. These
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copies are necessary to get past the start bit and to make the MMC
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controller drive DATx to known levels. Once this pattern has been
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sent, we switch DATx to GPIO.
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When this is done, ubb-patgen waits for the trigger. In this
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example, we first ignore a glitch and then detect a correct
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trigger value. Note that the effective debounce period is usually
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longer than specified, since other system activity can delay the
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sampling.
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Once ubb-patgen has triggered, it starts the DMA controller and
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thus begins sending the pattern. The first cycle (marked with a
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question mark) is an uncommanded repetition of the first pattern
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(apparently there is a buffer stage in the MMC controller)
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followed by the entire sequence, first to last pattern.
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At the end, several copies of the last pattern may be sent in
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order to reach the transfer size of the DMA controller (32 bytes).
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ubb-patgen then ensures that all data has left the MMC controller,
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switches DATx back to GPIO, and exits.
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259
ubb-patgen/timeline.fig
Normal file
259
ubb-patgen/timeline.fig
Normal file
@ -0,0 +1,259 @@
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#FIG 3.2 Produced by xfig version 3.2.5b
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Landscape
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Center
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Metric
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A4
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100.00
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Single
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-2
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1200 2
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6 11880 5265 12465 5535
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2 2 0 0 0 7 20 -1 20 0.000 0 0 -1 0 0 5
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11880 5265 12465 5265 12465 5535 11880 5535 11880 5265
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4 1 0 15 -1 18 12 0.0000 4 150 525 12195 5490 Initial\001
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-6
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6 1575 990 2160 1260
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2 2 0 0 0 7 20 -1 20 0.000 0 0 -1 0 0 5
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1575 990 2160 990 2160 1260 1575 1260 1575 990
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4 1 0 15 -1 18 12 0.0000 4 150 525 1890 1215 Initial\001
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-6
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6 1575 1890 2160 2160
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2 2 0 0 0 7 20 -1 20 0.000 0 0 -1 0 0 5
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1575 1890 2160 1890 2160 2160 1575 2160 1575 1890
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4 1 0 15 -1 18 12 0.0000 4 150 525 1890 2115 Initial\001
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-6
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6 1575 2790 2340 3105
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2 2 0 0 0 7 20 -1 20 0.000 0 0 -1 0 0 5
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1575 2790 2340 2790 2340 3105 1575 3105 1575 2790
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4 1 0 15 -1 18 12 0.0000 4 195 720 1980 3015 Ignored\001
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-6
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6 11610 2790 12375 3105
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2 2 0 0 0 7 20 -1 20 0.000 0 0 -1 0 0 5
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11610 2790 12375 2790 12375 3105 11610 3105 11610 2790
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4 1 0 15 -1 18 12 0.0000 4 195 720 12015 3015 Ignored\001
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-6
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6 6525 7065 7290 7380
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2 2 0 0 0 7 20 -1 20 0.000 0 0 -1 0 0 5
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6525 7065 7290 7065 7290 7380 6525 7380 6525 7065
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4 1 0 15 -1 18 12 0.0000 4 195 720 6930 7290 Ignored\001
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-6
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2 1 0 2 0 7 45 -1 -1 0.000 0 0 -1 0 0 2
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6525 2700 7650 2700
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2 1 1 2 0 7 40 -1 -1 6.000 0 0 -1 0 0 2
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7650 2700 8550 2700
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2 1 0 2 0 7 45 -1 -1 0.000 0 0 -1 0 0 8
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8550 2700 9225 2700 9225 3150 9360 3150 9360 2700 10350 2700
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10350 3150 11025 3150
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2 1 0 2 0 7 35 -1 17 0.000 0 0 -1 0 0 4
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12825 3150 11025 3150 11025 2700 12825 2700
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2 1 0 2 0 7 50 -1 45 0.000 0 0 -1 0 0 4
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1125 2250 3375 2250 3150 1800 1125 1800
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2 1 0 2 0 7 45 -1 -1 0.000 0 0 -1 0 0 2
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3375 2250 7650 2250
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2 1 0 2 0 7 45 -1 -1 0.000 0 0 -1 0 0 2
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8550 2250 11475 2250
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2 1 1 2 0 7 40 -1 -1 6.000 0 0 -1 0 0 2
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7650 2250 8550 2250
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2 1 0 2 0 7 45 -1 -1 0.000 0 0 -1 0 0 2
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12150 2250 12825 2250
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2 1 0 2 0 7 45 -1 -1 0.000 0 0 -1 0 0 7
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3600 900 4500 900 4500 1350 4725 1350 4725 900 4950 900
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4950 1350
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2 1 0 2 0 7 45 -1 -1 0.000 0 0 -1 0 0 7
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5625 1350 5625 900 5850 900 5850 1350 6075 1350 6075 900
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7650 900
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2 1 1 2 0 7 40 -1 -1 6.000 0 0 -1 0 0 2
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4950 1350 5625 1350
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2 1 0 2 0 7 45 -1 -1 0.000 0 0 -1 0 0 2
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8550 900 11475 900
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2 1 1 2 0 7 40 -1 -1 6.000 0 0 -1 0 0 2
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7650 900 8550 900
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2 1 0 2 0 7 45 -1 -1 0.000 0 0 -1 0 0 2
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12150 900 12825 900
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2 1 0 2 0 7 50 -1 17 0.000 0 0 -1 0 0 2
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6525 3375 6525 3825
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 0 0 2
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9225 2610 9225 1800
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 0 0 2
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9675 2610 9675 1800
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 1 2
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1 1 2.00 60.00 60.00
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1 1 2.00 60.00 60.00
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9225 1935 9675 1935
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2 1 1 2 0 7 40 -1 -1 6.000 0 0 -1 0 0 2
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11475 900 12150 900
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2 1 1 2 0 7 40 -1 -1 6.000 0 0 -1 0 0 2
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11475 2250 12150 2250
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2 1 0 2 0 7 50 -1 17 0.000 0 0 -1 0 0 2
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11025 3375 11025 3825
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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5580 3600 6525 3600
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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7650 3600 6525 3600
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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8370 3600 11025 3600
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 0 0 2
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10350 2610 10350 1800
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 0 0 2
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11025 2610 11025 1800
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2 1 0 2 0 7 50 -1 17 0.000 0 0 -1 0 0 2
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1575 3375 1575 3825
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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1800 3600 1575 3600
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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3150 3600 3375 3600
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2 1 0 2 0 7 50 -1 17 0.000 0 0 -1 0 0 2
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3375 3375 3375 3825
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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4320 3600 3375 3600
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2 1 0 2 0 7 50 -1 17 0.000 0 0 -1 0 0 2
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12825 3375 12825 3825
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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11295 3600 11025 3600
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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12555 3600 12825 3600
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2 1 0 2 0 7 50 -1 -1 0.000 0 0 -1 0 0 2
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1125 6975 12825 6975
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2 1 0 2 0 7 50 -1 -1 0.000 0 0 -1 0 0 2
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1125 7425 12825 7425
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2 1 0 2 0 7 50 -1 17 0.000 0 0 -1 0 0 2
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1125 7650 1125 8100
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2 1 0 2 0 7 45 -1 -1 0.000 0 0 -1 0 0 10
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1125 6525 3375 6525 3375 6075 4275 6075 4275 6525 4725 6525
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4725 6075 5625 6075 5625 6525 7425 6525
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2 1 0 2 0 7 45 -1 -1 0.000 0 0 -1 0 0 47
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1125 5175 2475 5175 2475 5625 2700 5625 2700 5175 2925 5175
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2925 5625 3150 5625 3150 5175 3375 5175 3375 5625 3600 5625
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3600 5175 3825 5175 3825 5625 4050 5625 4050 5175 4275 5175
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4275 5625 4500 5625 4500 5175 4725 5175 4725 5625 4950 5625
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4950 5175 5175 5175 5175 5625 5400 5625 5400 5175 5625 5175
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5625 5625 5850 5625 5850 5175 6075 5175 6075 5625 6300 5625
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6300 5175 6525 5175 6525 5625 6750 5625 6750 5175 6975 5175
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6975 5625 7200 5625 7200 5175 7425 5175 7425 5625
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2 1 0 2 0 7 45 -1 -1 0.000 0 0 -1 0 0 7
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8325 5625 8325 5175 8550 5175 8550 5625 8775 5625 8775 5175
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11250 5175
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2 1 0 2 0 7 45 -1 -1 0.000 0 0 -1 0 0 2
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8325 6525 12825 6525
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2 1 1 2 0 7 40 -1 -1 6.000 0 0 -1 0 0 2
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7425 5625 8325 5625
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2 1 1 2 0 7 40 -1 -1 6.000 0 0 -1 0 0 2
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7425 6525 8325 6525
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2 1 0 2 0 7 50 -1 45 0.000 0 0 -1 0 0 4
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12825 5175 11250 5175 11475 5625 12825 5625
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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2970 6300 2475 6300
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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6030 6300 6525 6300
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2 1 0 2 0 7 50 -1 17 0.000 0 0 -1 0 0 2
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2475 7650 2475 8100
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2 1 0 2 0 7 50 -1 17 0.000 0 0 -1 0 0 2
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2925 7650 2925 8100
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2 1 0 2 0 7 50 -1 17 0.000 0 0 -1 0 0 2
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6075 7650 6075 8100
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2 1 0 2 0 7 50 -1 17 0.000 0 0 -1 0 0 2
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9000 7650 9000 8100
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2 1 0 2 0 7 50 -1 17 0.000 0 0 -1 0 0 2
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11925 7650 11925 8100
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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11475 7875 11925 7875
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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9225 7875 9000 7875
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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7965 7875 9000 7875
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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7065 7875 6075 7875
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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4950 7875 6075 7875
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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4050 7875 2925 7875
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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2340 7875 2475 7875
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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1260 7875 1125 7875
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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2610 7875 2475 7875
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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2790 7875 2925 7875
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 1 2
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1 1 2.00 60.00 60.00
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1 1 2.00 60.00 60.00
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10350 1935 11025 1935
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2 1 0 2 0 7 50 -1 17 0.000 0 0 -1 0 0 4
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1125 2700 6525 2700 6525 3150 1125 3150
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2 1 0 2 0 7 50 -1 45 0.000 0 0 -1 0 0 4
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1125 1350 3375 1350 3600 900 1125 900
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2 2 0 0 0 7 60 -1 17 0.000 0 0 -1 0 0 5
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1125 6975 12825 6975 12825 7425 1125 7425 1125 6975
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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9855 7875 10125 7875
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2 1 0 2 0 7 50 -1 17 0.000 0 0 -1 0 0 2
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10125 7605 10125 8055
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 1 0 2
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1 1 2.00 60.00 60.00
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10575 7875 10125 7875
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 0 0 2
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10350 6075 10350 6435
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2 1 0 2 0 7 30 -1 17 0.000 0 0 -1 0 0 2
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6300 1800 6300 2160
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4 0 0 35 -1 18 18 0.0000 4 225 735 225 7335 TRIG\001
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4 0 0 35 -1 18 18 0.0000 4 225 795 225 6435 DATx\001
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4 0 0 35 -1 18 18 0.0000 4 225 630 225 5535 CLK\001
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4 0 0 35 -1 18 18 0.0000 4 225 735 225 3060 TRIG\001
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4 0 0 35 -1 18 18 0.0000 4 225 795 225 2160 DATx\001
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4 0 0 35 -1 18 18 0.0000 4 225 630 225 1260 CLK\001
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4 1 0 35 -1 18 12 0.0000 4 150 435 1575 4095 Start\001
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4 1 0 50 -1 18 12 0.0000 4 150 555 9315 3420 Glitch\001
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4 1 0 35 -1 18 12 0.0000 4 195 900 11025 4095 Triggered\001
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4 1 0 35 -1 18 12 0.0000 4 195 570 6525 4095 Ready\001
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4 1 0 35 -1 18 12 0.0000 4 135 105 3150 6345 0\001
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4 1 0 35 -1 18 12 0.0000 4 135 105 3600 6345 1\001
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4 1 0 35 -1 18 12 0.0000 4 135 105 4050 6345 1\001
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4 1 0 35 -1 18 12 0.0000 4 135 105 4950 6345 1\001
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4 1 0 35 -1 18 12 0.0000 4 135 105 5400 6345 1\001
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4 1 0 35 -1 18 12 0.0000 4 135 105 4500 6345 0\001
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4 1 0 35 -1 18 12 0.0000 4 135 105 5850 6345 0\001
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4 1 0 35 -1 18 12 0.0000 4 150 360 11925 8370 Exit\001
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4 1 0 35 -1 18 12 0.0000 4 150 120 2700 7965 ?\001
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4 1 0 35 -1 18 12 0.0000 4 195 1095 2475 3645 Static setup\001
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4 1 0 35 -1 18 12 0.0000 4 195 1035 4950 3645 MMC setup\001
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4 1 0 35 -1 18 12 0.0000 4 150 405 8010 3645 Wait\001
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4 1 0 35 -1 18 12 0.0000 4 195 1110 11925 3645 Trigger wait\001
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4 1 0 35 -1 18 12 0.0000 4 150 660 4500 7920 Pattern\001
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4 1 0 35 -1 18 12 0.0000 4 195 780 7515 7920 Padding\001
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4 1 0 35 -1 18 12 0.0000 4 150 930 1800 7920 Start DMA\001
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4 1 0 50 -1 18 12 0.0000 4 195 2010 10080 1575 Trigger debounce (-d)\001
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4 1 0 50 -1 18 10 0.0000 4 120 300 9450 1845 min\001
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4 1 0 50 -1 18 10 0.0000 4 120 255 10710 1845 eff.\001
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4 1 0 35 -1 18 12 0.0000 4 195 465 9540 7920 Sync\001
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4 1 0 35 -1 18 12 0.0000 4 195 765 11025 7920 Cleanup\001
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4 0 0 50 -1 18 10 0.0000 4 120 420 3375 1980 GPIO\001
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4 2 0 50 -1 18 10 0.0000 4 120 390 10260 6255 MMC\001
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4 0 0 50 -1 18 10 0.0000 4 120 420 10440 6255 GPIO\001
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4 0 0 50 -1 18 10 0.0000 4 120 390 6390 1980 MMC\001
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4 2 0 50 -1 18 10 0.0000 4 120 420 6210 1980 GPIO\001
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4 1 0 35 -1 18 12 0.0000 4 180 330 11925 3870 (-w)\001
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4 1 0 35 -1 18 12 0.0000 4 180 315 495 1485 (-C)\001
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4 1 0 35 -1 18 12 0.0000 4 180 240 495 3285 (-t)\001
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4 1 0 35 -1 18 12 0.0000 4 195 3405 5625 1620 MMC command, response, data start\001
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