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authorjaseg <git@jaseg.de>2023-12-07 14:31:15 +0100
committerjaseg <git@jaseg.de>2023-12-07 14:31:15 +0100
commit7f376f46d680b9bb3ab4665344c6f2cb3f4cdc03 (patch)
tree279209ca9c1028758a0ce55d9437cbf4ec4e0dbb
parent400ad2288d63560a254dae12a5014098c6929959 (diff)
download8seg-7f376f46d680b9bb3ab4665344c6f2cb3f4cdc03.tar.gz
8seg-7f376f46d680b9bb3ab4665344c6f2cb3f4cdc03.tar.bz2
8seg-7f376f46d680b9bb3ab4665344c6f2cb3f4cdc03.zip
Build WIP
Diffstat
-rw-r--r--8seg_digit_circuit.svg1065
-rw-r--r--8seg_strand_power_distribution.svg500
-rw-r--r--center_fw/src/main.c2
-rw-r--r--led_tape.svg48
-rw-r--r--len_map.py96
5 files changed, 1687 insertions, 24 deletions
diff --git a/8seg_digit_circuit.svg b/8seg_digit_circuit.svg
new file mode 100644
index 0000000..f67610d
--- /dev/null
+++ b/8seg_digit_circuit.svg
@@ -0,0 +1,1065 @@
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+ <text
+ xml:space="preserve"
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+ style="font-size:18.6667px;line-height:normal;font-family:'Sitka Display';-inkscape-font-specification:'Sitka Display, Normal';text-align:end;text-decoration-color:#000000;white-space:pre;shape-inside:url(#rect46);display:inline;fill:#000000;stroke-width:0.592113;stroke-linecap:round;stroke-linejoin:round"><tspan
+ x="296.63626"
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+ <text
+ xml:space="preserve"
+ transform="matrix(0.50666058,0,0,0.50666058,9.2213001,-75.07778)"
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+ x="296.74414"
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+ id="tspan6"><tspan
+ style="-inkscape-font-specification:'Sitka Display'"
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+ <text
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+ transform="matrix(0.50666058,0,0,0.50666058,23.257104,-75.07778)"
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+ x="296.31273"
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+ style="-inkscape-font-specification:'Sitka Display'"
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+ <text
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+ transform="matrix(0.50666058,0,0,0.50666058,37.086934,-75.07778)"
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+ x="297.19215"
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+ transform="matrix(0.50666058,0,0,0.50666058,51.200505,-75.07778)"
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+ transform="matrix(0.50666058,0,0,0.50666058,79.330959,-75.07778)"
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+ x="295.94769"
+ y="355.42094"
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+ style="-inkscape-font-specification:'Sitka Display'"
+ id="tspan15">8</tspan></tspan></text>
+ <path
+ style="fill:none;stroke:#000000;stroke-width:0.3;stroke-linecap:round;stroke-linejoin:round"
+ d="m 140.75158,80.570218 h 12.4892"
+ id="path52"
+ sodipodi:nodetypes="cc" />
+ <path
+ style="fill:none;stroke:#000000;stroke-width:0.3;stroke-linecap:round;stroke-linejoin:round"
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+ id="path56"
+ sodipodi:nodetypes="cc" />
+ <path
+ style="fill:none;stroke:#000000;stroke-width:0.3;stroke-linecap:round;stroke-linejoin:round"
+ d="m 140.60158,77.580565 h 27.24371"
+ id="path63"
+ sodipodi:nodetypes="cc" />
+ <path
+ style="fill:none;stroke:#000000;stroke-width:0.3;stroke-linecap:round;stroke-linejoin:round"
+ d="m 169.32363,77.580565 h 26.1367"
+ id="path64"
+ sodipodi:nodetypes="cc" />
+ <path
+ style="fill:none;stroke:#000000;stroke-width:0.3;stroke-linecap:round;stroke-linejoin:round"
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+ id="path65"
+ sodipodi:nodetypes="cc" />
+ <text
+ xml:space="preserve"
+ transform="matrix(0.26458333,0,0,0.26458333,27.983625,10.314591)"
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+ style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:18.6667px;line-height:normal;font-family:'Sitka Display';-inkscape-font-specification:'Sitka Display';text-align:end;text-decoration-color:#000000;white-space:pre;shape-inside:url(#rect65);display:inline;fill:none;stroke:#000000;stroke-width:1.13386;stroke-linecap:round;stroke-linejoin:round"><tspan
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+ id="tspan17">0.2 m</tspan></tspan></text>
+ <text
+ xml:space="preserve"
+ transform="matrix(0.26458333,0,0,0.26458333,2.0120841,5.8582719)"
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+ x="279.80754"
+ y="284.63383"
+ id="tspan20"><tspan
+ style="fill:#000000;stroke:none"
+ id="tspan19">0.4 + 1.0 + 0.3 m = 1.7 m</tspan></tspan></text>
+ <text
+ xml:space="preserve"
+ transform="matrix(0.26458333,0,0,0.26458333,-35.385118,1.404148)"
+ id="text67"
+ style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:18.6667px;line-height:normal;font-family:'Sitka Display';-inkscape-font-specification:'Sitka Display';text-align:end;text-decoration-color:#000000;white-space:pre;shape-inside:url(#rect67);display:inline;fill:none;stroke:#000000;stroke-width:1.13386;stroke-linecap:round;stroke-linejoin:round"><tspan
+ x="247.66717"
+ y="284.63383"
+ id="tspan22"><tspan
+ style="fill:#000000;stroke:none"
+ id="tspan21">0.4 + 1.0 + 0.4 + 1.0 + 0.1 + 0.2 + 0.2 m = 3.3 m</tspan></tspan></text>
+ <path
+ style="fill:none;stroke:#000000;stroke-width:0.3;stroke-linecap:round;stroke-linejoin:round"
+ d="m 168.77046,80.570218 h 12.4892"
+ id="path67"
+ sodipodi:nodetypes="cc" />
+ <path
+ style="fill:none;stroke:#000000;stroke-width:0.3;stroke-linecap:round;stroke-linejoin:round"
+ d="m 166.39244,82.867536 h 2.07802"
+ id="path68"
+ sodipodi:nodetypes="cc" />
+ <path
+ style="fill:none;stroke:#000000;stroke-width:0.3;stroke-linecap:round;stroke-linejoin:round"
+ d="m 196.52763,80.570218 h 12.4892"
+ id="path69"
+ sodipodi:nodetypes="cc" />
+ <path
+ style="fill:none;stroke:#000000;stroke-width:0.3;stroke-linecap:round;stroke-linejoin:round"
+ d="m 194.14961,82.867536 h 2.07802"
+ id="path70"
+ sodipodi:nodetypes="cc" />
+ <path
+ style="fill:none;stroke:#000000;stroke-width:0.3;stroke-linecap:round;stroke-linejoin:round"
+ d="m 223.72646,80.570218 h 12.4892"
+ id="path71"
+ sodipodi:nodetypes="cc" />
+ <path
+ style="fill:none;stroke:#000000;stroke-width:0.3;stroke-linecap:round;stroke-linejoin:round"
+ d="m 221.34844,82.867536 h 2.07802"
+ id="path72"
+ sodipodi:nodetypes="cc" />
+ <path
+ style="fill:#000000;stroke:#808080;stroke-width:0.15;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:none"
+ d="M 140.45158,73.993385 V 88.513586"
+ id="path73" />
+ <path
+ style="fill:#000000;stroke:#808080;stroke-width:0.15;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:none"
+ d="M 168.714,73.993385 V 88.513586"
+ id="path74" />
+ <path
+ style="fill:#000000;stroke:#808080;stroke-width:0.15;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:none"
+ d="M 196.30263,73.993385 V 88.513586"
+ id="path75" />
+ <path
+ style="fill:#000000;stroke:#808080;stroke-width:0.15;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:none"
+ d="M 223.71141,73.993385 V 88.513586"
+ id="path76" />
+ <text
+ xml:space="preserve"
+ transform="matrix(0.26458333,0,0,0.26458333,23.84675,-15.672795)"
+ id="text76"
+ style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:18.6667px;line-height:normal;font-family:'Sitka Display';-inkscape-font-specification:'Sitka Display';text-align:end;text-decoration-color:#000000;white-space:pre;shape-inside:url(#rect76);display:inline;fill:#000000;stroke:none;stroke-width:0.566929;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:none"><tspan
+ x="472.27943"
+ y="215.97367"
+ id="tspan23">Splitter &quot;A&quot; side is cable red side</tspan></text>
+ <text
+ xml:space="preserve"
+ transform="matrix(0.26458333,0,0,0.26458333,-1.1460406,-9.3386453)"
+ id="text77"
+ style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:18.6667px;line-height:normal;font-family:'Sitka Display';-inkscape-font-specification:'Sitka Display';text-align:end;text-decoration-color:#000000;white-space:pre;shape-inside:url(#rect77);display:inline;fill:#000000;stroke:none;stroke-width:0.566929;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:none"><tspan
+ x="366.318"
+ y="215.97367"
+ id="tspan24">Left (short) stub: Terminal block right side is cable red side</tspan></text>
+ <text
+ xml:space="preserve"
+ transform="matrix(0.26458333,0,0,0.26458333,-35.928931,-3.0044956)"
+ id="text78"
+ style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:18.6667px;line-height:normal;font-family:'Sitka Display';-inkscape-font-specification:'Sitka Display';text-align:end;text-decoration-color:#000000;white-space:pre;shape-inside:url(#rect78);display:inline;fill:#000000;stroke:none;stroke-width:0.566929;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:none"><tspan
+ x="505.71223"
+ y="215.97367"
+ id="tspan25">Right (long) stub: Terminal block left side is cable red side</tspan></text>
+ </g>
+</svg>
diff --git a/center_fw/src/main.c b/center_fw/src/main.c
index c066297..8c91607 100644
--- a/center_fw/src/main.c
+++ b/center_fw/src/main.c
@@ -209,7 +209,7 @@ void ADC1_IRQHandler(void) {
/* Read sample and apply threshold */
int sample = ADC1->DR; /* resets the EOC interrupt flag */
- int bit = sample > THRESHOLD_ADC_COUNTS;
+ int bit = sample < THRESHOLD_ADC_COUNTS;
int bit_margin = ((int)sample) - THRESHOLD_ADC_COUNTS;
if (bit_margin < 0) {
bit_margin = -bit_margin;
diff --git a/led_tape.svg b/led_tape.svg
index 6999959..3d7796f 100644
--- a/led_tape.svg
+++ b/led_tape.svg
@@ -2,21 +2,21 @@
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<svg
- xmlns:dc="http://purl.org/dc/elements/1.1/"
- xmlns:cc="http://creativecommons.org/ns#"
- xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
- xmlns:svg="http://www.w3.org/2000/svg"
- xmlns="http://www.w3.org/2000/svg"
- xmlns:xlink="http://www.w3.org/1999/xlink"
- xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
- xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
version="1.1"
id="svg2"
width="5mm"
height="2.5mm"
viewBox="0 0 18.897638 9.4488189"
sodipodi:docname="led_tape.svg"
- inkscape:version="0.92.3 (2405546, 2018-03-11)">
+ inkscape:version="1.3 (0e150ed6c4, 2023-07-21)"
+ xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+ xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+ xmlns:xlink="http://www.w3.org/1999/xlink"
+ xmlns="http://www.w3.org/2000/svg"
+ xmlns:svg="http://www.w3.org/2000/svg"
+ xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+ xmlns:cc="http://creativecommons.org/ns#"
+ xmlns:dc="http://purl.org/dc/elements/1.1/">
<metadata
id="metadata8">
<rdf:RDF>
@@ -25,7 +25,6 @@
<dc:format>image/svg+xml</dc:format>
<dc:type
rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
- <dc:title></dc:title>
</cc:Work>
</rdf:RDF>
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guidetolerance="10"
inkscape:pageopacity="0"
inkscape:pageshadow="2"
- inkscape:window-width="1920"
- inkscape:window-height="1030"
+ inkscape:window-width="3208"
+ inkscape:window-height="1981"
id="namedview4"
showgrid="false"
- inkscape:zoom="0.99999999"
- inkscape:cx="119.84761"
- inkscape:cy="40.617263"
- inkscape:window-x="0"
- inkscape:window-y="50"
+ inkscape:zoom="0.12102105"
+ inkscape:cx="-1222.9277"
+ inkscape:cy="-1739.3668"
+ inkscape:window-x="26"
+ inkscape:window-y="23"
inkscape:window-maximized="0"
inkscape:current-layer="svg2"
inkscape:measure-start="288.323,-37.2999"
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fit-margin-right="0"
fit-margin-bottom="0"
inkscape:document-units="mm"
- inkscape:snap-global="false" />
+ inkscape:snap-global="false"
+ inkscape:showpageshadow="2"
+ inkscape:pagecheckerboard="0"
+ inkscape:deskcolor="#d1d1d1" />
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id="g7297-4"
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+ transform="matrix(1.5310128,0,0,1.6910455,-1737.4329,315.54284)"
+ style="fill:none;stroke:#bfbfbf;stroke-width:20.6453;stroke-miterlimit:4;stroke-dasharray:none">
<path
sodipodi:nodetypes="ccccc"
inkscape:connector-curvature="0"
id="path7288-9"
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diff --git a/len_map.py b/len_map.py
new file mode 100644
index 0000000..89642ba
--- /dev/null
+++ b/len_map.py
@@ -0,0 +1,96 @@
+#!/usr/bin/env python3
+
+# This script calculates the optimal cut distribution to reduce waste while matching the desired 2:2:4 segment count
+# It applies brute force since the problem space is very small.
+
+import numpy as np
+import itertools
+
+l_tot = 500
+
+a, b, c = 94, 124, 80
+n, m, l = 2, 2, 4
+arr = np.array([a, b, c], dtype=int)
+arr_count = np.array([n, m, l], dtype=int)
+
+# Find all possible splits of a [l_tot] m led tape into segments of lengths [a], [b] and [c] that leave a remainder
+# that's smaller than any of [a], [b] and [c].
+candidates = []
+for i in range(l_tot//a + 1):
+ l_rem_i = l_tot - i*a
+ if l_rem_i < 0:
+ continue
+
+ for j in range(l_rem_i//b + 1):
+ l_rem_j = l_rem_i - j*b
+ if l_rem_j < 0:
+ continue
+
+ k = l_rem_j // c
+ l_rem_k = l_rem_j - k*c
+
+ print(f'Candidate: ({i} {j} {k}) {i=}*{a} {j=}*{b=} {k=}*{c=} => remainder {l_rem_k}')
+ candidates.append((i, j, k))
+candidates = np.array(candidates, dtype=int)
+print()
+
+# Find all ways to combine the cuts found above to cut [num_rolls] into segments, where the amount of segments of length
+# [a], [b], and [c] that we get in total best matches the proportions we need ([n] times [a], [m] times [b], [l] times
+# [c], so 2:2:4 times for 94:124:80 cm)
+num_rolls = 3
+indices_seen = set()
+out = []
+for indices in itertools.product(candidates, repeat=num_rolls):
+ indices = np.array(indices)
+ index_tup = tuple(sorted(map(tuple, indices)))
+ if index_tup in indices_seen:
+ continue
+ indices_seen.add(index_tup)
+ rem = l_tot - (indices * arr).sum(axis=1)
+ rem_total = rem.sum()
+ count_total = indices.sum(axis=0).astype(float)
+ count_total /= arr_count
+ spread = count_total.max() - count_total.min()
+
+ if spread > 2 or (rem < 2).any():
+ continue
+ print(indices.tolist(), f'{rem_total=} {spread=}')
+ out.append((spread, rem_total, indices.tolist(), rem.tolist(), indices.sum(axis=0).tolist()))
+print()
+
+# Print out the n best matches found. Sort first by how close we match our target 2:2:4 ratio, then by how much waste
+# we leave.
+print('Best matches:')
+for spread, rem_total, indices, rem, index_sum in sorted(out, key=lambda x: (x[0], x[1]))[:25]:
+ print(indices, f'{spread=} {rem_total=} {rem=} {index_sum=}')
+
+# Here's the output for future reference. There are a number of combinations that produce 68 cm of waste split across
+# three 5m rolls of tape. We selected # 1 since it leaves leftovers of useful lengths.
+#
+# Best matches:
+# [[0, 0, 6], [0, 4, 0], [4, 0, 1]] spread=0.25 rem_total=68 rem=[20, 4, 44] index_sum=[4, 4, 7]
+# [[0, 0, 6], [1, 3, 0], [3, 1, 1]] spread=0.25 rem_total=68 rem=[20, 34, 14] index_sum=[4, 4, 7]
+# [[0, 2, 3], [0, 2, 3], [4, 0, 1]] spread=0.25 rem_total=68 rem=[12, 12, 44] index_sum=[4, 4, 7]
+# [[0, 2, 3], [1, 1, 3], [3, 1, 1]] spread=0.25 rem_total=68 rem=[12, 42, 14] index_sum=[4, 4, 7]
+# [[0, 2, 3], [2, 1, 2], [2, 1, 2]] spread=0.25 rem_total=68 rem=[12, 28, 28] index_sum=[4, 4, 7]
+# [[0, 3, 1], [1, 0, 5], [3, 1, 1]] spread=0.25 rem_total=68 rem=[48, 6, 14] index_sum=[4, 4, 7]
+# [[0, 4, 0], [1, 0, 5], [3, 0, 2]] spread=0.25 rem_total=68 rem=[4, 6, 58] index_sum=[4, 4, 7]
+# [[1, 0, 5], [1, 3, 0], [2, 1, 2]] spread=0.25 rem_total=68 rem=[6, 34, 28] index_sum=[4, 4, 7]
+# [[0, 0, 6], [0, 3, 1], [3, 1, 1]] spread=0.5 rem_total=82 rem=[20, 48, 14] index_sum=[3, 4, 8]
+# [[0, 0, 6], [0, 4, 0], [3, 0, 2]] spread=0.5 rem_total=82 rem=[20, 4, 58] index_sum=[3, 4, 8]
+# [[0, 0, 6], [1, 3, 0], [2, 1, 2]] spread=0.5 rem_total=82 rem=[20, 34, 28] index_sum=[3, 4, 8]
+# [[0, 1, 4], [0, 2, 3], [3, 1, 1]] spread=0.5 rem_total=82 rem=[56, 12, 14] index_sum=[3, 4, 8]
+# [[0, 2, 3], [0, 2, 3], [3, 0, 2]] spread=0.5 rem_total=82 rem=[12, 12, 58] index_sum=[3, 4, 8]
+# [[0, 2, 3], [1, 0, 5], [2, 2, 0]] spread=0.5 rem_total=82 rem=[12, 6, 64] index_sum=[3, 4, 8]
+# [[0, 2, 3], [1, 1, 3], [2, 1, 2]] spread=0.5 rem_total=82 rem=[12, 42, 28] index_sum=[3, 4, 8]
+# [[0, 3, 1], [1, 0, 5], [2, 1, 2]] spread=0.5 rem_total=82 rem=[48, 6, 28] index_sum=[3, 4, 8]
+# [[0, 4, 0], [1, 0, 5], [2, 0, 3]] spread=0.5 rem_total=82 rem=[4, 6, 72] index_sum=[3, 4, 8]
+# [[1, 0, 5], [1, 1, 3], [1, 3, 0]] spread=0.5 rem_total=82 rem=[6, 42, 34] index_sum=[3, 4, 8]
+# [[0, 0, 6], [0, 3, 1], [4, 0, 1]] spread=0.5 rem_total=112 rem=[20, 48, 44] index_sum=[4, 3, 8]
+# [[0, 0, 6], [1, 2, 1], [3, 1, 1]] spread=0.5 rem_total=112 rem=[20, 78, 14] index_sum=[4, 3, 8]
+# [[0, 0, 6], [1, 3, 0], [3, 0, 2]] spread=0.5 rem_total=112 rem=[20, 34, 58] index_sum=[4, 3, 8]
+# [[0, 0, 6], [2, 1, 2], [2, 2, 0]] spread=0.5 rem_total=112 rem=[20, 28, 64] index_sum=[4, 3, 8]
+# [[0, 1, 4], [0, 2, 3], [4, 0, 1]] spread=0.5 rem_total=112 rem=[56, 12, 44] index_sum=[4, 3, 8]
+# [[0, 1, 4], [1, 1, 3], [3, 1, 1]] spread=0.5 rem_total=112 rem=[56, 42, 14] index_sum=[4, 3, 8]
+# [[0, 1, 4], [2, 1, 2], [2, 1, 2]] spread=0.5 rem_total=112 rem=[56, 28, 28] index_sum=[4, 3, 8]
+
generated by cgit (git 2.34.1) at 2024-05-05 09:24:34 +0000