From b791e9ab3358083ecac40d409096e4624ef3878b Mon Sep 17 00:00:00 2001
From: Erik Strand <erik.strand@cba.mit.edu>
Date: Fri, 10 May 2019 00:37:45 -0400
Subject: [PATCH] Start drawing traces
---
node_board/main.cpp | 111 +++++++++++++++++++++++++++-----------------
1 file changed, 69 insertions(+), 42 deletions(-)
diff --git a/node_board/main.cpp b/node_board/main.cpp
index 81f77ef..729c2b8 100644
--- a/node_board/main.cpp
+++ b/node_board/main.cpp
@@ -3,10 +3,10 @@
//--------------------------------------------------------------------------------------------------
struct Rectangle {
- uint32_t x_min;
- uint32_t x_max;
- uint32_t y_min;
- uint32_t y_max;
+ int32_t x_min;
+ int32_t x_max;
+ int32_t y_min;
+ int32_t y_max;
};
//--------------------------------------------------------------------------------------------------
@@ -21,19 +21,23 @@ public:
png_writer_.set_all_pixels(255);
}
- uint32_t to_px(double x) {
- return static_cast<uint32_t>(pix_per_mm_ * x);
+ int32_t to_px(double x) {
+ return static_cast<int32_t>(pix_per_mm_ * x);
}
- void set_pixel(uint32_t x, uint32_t y, uint8_t value = 255) {
+ void set_pixel(int32_t x, int32_t y, uint8_t value = 255) {
png_writer_.set_pixel(x, height_px_ - y - 1, value);
}
- void draw_rectangle(
- uint32_t x_min, uint32_t x_max, uint32_t y_min, uint32_t y_max, uint8_t value = 255
+ void draw_int_rectangle(
+ int32_t x_min, int32_t x_max, int32_t y_min, int32_t y_max, uint8_t value = 255
) {
- for (uint32_t x = x_min; x <= x_max; ++x) {
- for (uint32_t y = y_min; y <= y_max; ++y) {
+ x_min = std::max(0, x_min);
+ x_max = std::min(width_px_, x_max);
+ y_min = std::max(0, y_min);
+ y_max = std::min(height_px_, y_max);
+ for (int32_t x = x_min; x < x_max; ++x) {
+ for (int32_t y = y_min; y < y_max; ++y) {
set_pixel(x, y, value);
}
}
@@ -42,11 +46,11 @@ public:
void draw_rectangle(
double x_min, double x_max, double y_min, double y_max, uint8_t value = 255
) {
- draw_rectangle(to_px(x_min), to_px(x_max), to_px(y_min), to_px(y_max), value);
+ draw_int_rectangle(to_px(x_min), to_px(x_max), to_px(y_min), to_px(y_max), value);
}
void draw_rectangle(Rectangle const& r, uint8_t value = 255) {
- draw_rectangle(r.x_min, r.x_max, r.y_min, r.y_max, value);
+ draw_int_rectangle(r.x_min, r.x_max, r.y_min, r.y_max, value);
}
void draw_pad(double x_min, double x_max, double y_min, double y_max) {
@@ -66,9 +70,9 @@ public:
double height_;
double pix_per_mm_;
double min_cut_thickness_;
- uint32_t width_px_;
- uint32_t height_px_;
- uint32_t min_cut_thickness_px_;
+ int32_t width_px_;
+ int32_t height_px_;
+ int32_t min_cut_thickness_px_;
};
//--------------------------------------------------------------------------------------------------
@@ -81,46 +85,69 @@ int main() {
double pad_y_max;
// board params
- double const width = 6;
+ double const width = 6.6;
double const height = 14;
- double const ppmm = 50;
- double const min_cut_thickness = 0.4;
+ double const ppmm = 50; // equivalent to 1270 ppi
+ double const min_cut_thickness = 0.38;
+ double const min_trace_thickness = 0.35;
Board board(width, height, ppmm, min_cut_thickness);
// SOIC dims
- double const pad_width = 0.5;
+ double const pad_width = 0.6;
double const pad_height = 2.4;
//double const soic_width = 5;
double const soic_height = 7;
double const soic_pitch = 1.27;
- // Draw the SOIC pads
- double const soic_pos_x = 0.5 * (width - 3 * soic_pitch - pad_width);
- double const soic_pos_y = 0.5 * (height - soic_height);
- for (uint32_t i = 0; i < 4; ++i) {
+ // SOIC pads
+ double const soic_pos_x = min_trace_thickness + min_cut_thickness;
+ double const soic_btm_y = 0.5 * (height - soic_height);
+ double const soic_top_y = height - soic_btm_y;
+ for (int32_t i = 0; i < 4; ++i) {
pad_x_min = soic_pos_x + i * soic_pitch;
pad_x_max = pad_x_min + pad_width;
- pad_y_min = soic_pos_y;
- pad_y_max = pad_y_min + pad_height;
- board.draw_pad(pad_x_min, pad_x_max, pad_y_min, pad_y_max);
- pad_y_min = height - pad_y_max;
- pad_y_max = pad_y_min + pad_height;
- board.draw_pad(pad_x_min, pad_x_max, pad_y_min, pad_y_max);
+ pad_y_max = soic_btm_y + pad_height;
+ board.draw_pad(pad_x_min, pad_x_max, soic_btm_y, pad_y_max);
+ pad_y_min = soic_top_y - pad_height;
+ board.draw_pad(pad_x_min, pad_x_max, pad_y_min, soic_top_y);
}
- // Cable attachment dims
- /*
- double const cable_pad_height = 2.4;
- pad_x_min = (width - 2 * min_cut_thickness) / 3;
+ // Data/VCC divider
+ pad_x_min += pad_width + min_cut_thickness + min_trace_thickness;
pad_x_max = pad_x_min + min_cut_thickness;
- pad_y_min = 0;
- pad_y_max = pad_y_min + cable_pad_height;
- for (uint32_t x = to_px(pad_x_min); x < to_px(pad_x_max); ++x) {
- for (uint32_t y = to_px(pad_y_min); y < to_px(pad_y_max); ++y) {
- set_pixel(x, y);
- }
- }
- */
+ pad_y_min = soic_btm_y - min_cut_thickness;
+ pad_y_max = soic_top_y + min_cut_thickness;
+ std::cout << "Power trace is " << width - pad_x_max << "mm\n";
+ board.draw_rectangle(pad_x_min, pad_x_max, pad_y_min, pad_y_max, 0);
+
+ // Ground/data divider
+ pad_x_min = min_trace_thickness;
+ pad_x_max = pad_x_min + min_cut_thickness;
+ board.draw_rectangle(pad_x_min, pad_x_max, soic_btm_y, soic_top_y, 0);
+
+ // Ground pad links
+ pad_x_min += min_cut_thickness + 0.5 * (pad_width - min_trace_thickness);
+ pad_x_max = pad_x_min + min_trace_thickness;
+ pad_y_min = soic_btm_y - min_cut_thickness;
+ pad_y_max = soic_btm_y;
+ board.draw_rectangle(pad_x_min, pad_x_max, pad_y_min, pad_y_max, 255);
+
+ // Data and power pad links
+ pad_y_min = soic_top_y - pad_height - min_cut_thickness;
+ pad_y_max = soic_top_y + min_cut_thickness;
+ board.draw_rectangle(pad_x_min, pad_x_max, pad_y_min, pad_y_max, 255);
+ pad_x_min += soic_pitch;
+ pad_x_max += soic_pitch;
+ board.draw_rectangle(pad_x_min, pad_x_max, pad_y_min, pad_y_max, 255);
+
+ // Cable attachment dividers
+ double const cable_pad_width = (width - 2 * min_cut_thickness) / 3;
+ pad_x_min = cable_pad_width;
+ pad_x_max = pad_x_min + min_cut_thickness;
+ board.draw_rectangle(pad_x_min, pad_x_max, 0, soic_btm_y - min_cut_thickness, 0);
+ pad_x_min += cable_pad_width + min_cut_thickness;
+ pad_x_max = pad_x_min + min_cut_thickness;
+ board.draw_rectangle(pad_x_min, pad_x_max, 0, soic_btm_y - 2 * min_cut_thickness, 0);
board.save("node_board_traces.png");
--
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