X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=packages%2Fufqfpn28.5c;h=e66444492e40a0626721ff033838c801c02cf14f;hb=4a62f54d5137e0bcadc76f61bd496ffd326eb2fe;hp=c1b15acf5c2eab7fb1c21111cfc89ae43b2f098c;hpb=beaa9d9d6be135ddbd9594f3c951cacd32b81a37;p=hw%2Faltusmetrum

diff --git a/packages/ufqfpn28.5c b/packages/ufqfpn28.5c
index c1b15ac..e664444 100644
--- a/packages/ufqfpn28.5c
+++ b/packages/ufqfpn28.5c
@@ -21,11 +21,23 @@ import Footprint;
 real pad_width = 0.55;
 real corner_pad_width = 0.50;
 real pad_height = 0.30;
-real corner_pad_notch = 0.12;
+
+/* Required clearance between corner pads on the diagonal */
+real corner_diag_clearance = 0.21;
+
+/* horizontal/vertical size of corner cut out */
+#real corner_pad_notch = corner_diag_clearance / sqrt(2);
+real corner_pad_notch = 0.15;
+
+real corner_pad_minimum_height = pad_height - corner_pad_notch;
+real corner_pad_minimum_width = corner_pad_width - corner_pad_notch;
+
 real pad_spacing = 0.50;
 
-real pad_x_off = 3.20 / 2;
-real pad_y_off = 3.20 / 2;
+/* outer location of pad */
+
+real pad_x_off = (3.30 + 2 * 0.5) / 2;
+real pad_y_off = (3.30 + 2 * 0.5) / 2;
 
 real package_width = 4;
 real package_height = 4;
@@ -47,15 +59,17 @@ real corner(int dx, int dy) {
 	line(x, y, x, y - dy * len);
 }
 
+/*
 corner(-1, -1);
 corner(1, -1);
 corner(-1, 1);
 corner(1, 1);
+*/
 
 real dot_off = .3;
 
-line(-package_width/2 + dot_off, -package_height/2 + dot_off,
-     -package_width/2 + dot_off, -package_height/2 + dot_off);
+line(-package_width/2 - dot_off, -package_height/2 - dot_off,
+     -package_width/2 - dot_off, -package_height/2 - dot_off);
 
 for (int pad = 0; pad < num_pad; pad++) {
 	real pw = pad_width;
@@ -66,54 +80,68 @@ for (int pad = 0; pad < num_pad; pad++) {
 	int	nstep = 0;
 
 	if (pad == 0 || pad == num_pad-1)
-		nstep = 4;
+		nstep = 3;
 
 	for (int s = 0; s <= nstep; s++) {
-		if (nstep != 0) {
-			real	step = (corner_pad_notch) / nstep;
 
-			pw = corner_pad_width - (nstep - s) * step;
-			ph = pad_height - s * step*2/3;
+		real	pad_x, pad_y, pad_w, pad_h;
 
-			pwa = pad_width - pw;
-
-			pha = pad_height - ph;
-			if (pad != 0)
-				pha = -pha;
+		if (nstep != 0) {
+			real	ratio = s / nstep;
+
+			pad_x = 0;
+			if (pad == 0) {
+				pad_y = -pad_height / 2 * (1-ratio) + ((-pad_height / 2) + corner_pad_notch) * ratio;
+			} else {
+				pad_y = -pad_height / 2;
+			}
+			pad_w = corner_pad_minimum_width * (1-ratio) + corner_pad_width * ratio;
+
+			pad_h = pad_height * (1 - ratio) + corner_pad_minimum_height * ratio;
+
+			/* Make sure we don't violate the process minimums */
+			if (pad_h < process_trace)
+				pad_h = process_trace;
+
+		} else {
+			pad_x = 0;
+			pad_y = -pad_height / 2;
+			pad_w = pad_width;
+			pad_h = pad_height;
 		}
 
 		/* left (1-7) */
-		pad_mm(-pad_x_off - pw / 2 - pwa,
-		       pad_off(pad) + pha,
-		       pw,
-		       ph,
+		pad_mm(-pad_x_off + pad_x + pad_w / 2,
+		       pad_off(pad) + pad_y + pad_h / 2,
+		       pad_w,
+		       pad_h,
 		       sprintf("%d", pad + 1),
 		       sprintf("%d", pad + 1));
 
 		/* bottom (8-14) */
 
-		pad_mm(pad_off(pad) + pha,
-		       pad_y_off + pw / 2 + pwa,
-		       ph,
-		       pw,
+		pad_mm(pad_off(pad) + pad_y + pad_h / 2,
+		       pad_y_off + pad_x - pad_w / 2,
+		       pad_h,
+		       pad_w,
 		       sprintf("%d", pad + 8),
 		       sprintf("%d", pad + 8));
 
 		/* right side (15-21) */
 
-		pad_mm(pad_x_off + pw / 2 + pwa,
-		       -pad_off(pad) - pha,
-		       pw,
-		       ph,
+		pad_mm(pad_x_off - pad_x - pad_w / 2,
+		       -pad_off(pad) - pad_y - pad_h / 2,
+		       pad_w,
+		       pad_h,
 		       sprintf("%d", pad + 15),
 		       sprintf("%d", pad + 15));
 
 		/* top (22-28) */
 
-		pad_mm(-pad_off(pad) - pha,
-		       -pad_y_off - pw / 2 - pwa,
-		       ph,
-		       pw,
+		pad_mm(-pad_off(pad) - pad_y - pad_h / 2,
+		       -pad_y_off - pad_x + pad_w / 2,
+		       pad_h,
+		       pad_w,
 		       sprintf("%d", pad + 22),
 		       sprintf("%d", pad + 22));
 	}