plumbed new heatsink, gpio, uart mask selection thru sbcmf cmdline

lib/oem_hk.scad

@@ -1,6 +1,6 @@
 /*
-    uart_holder()
-    uart_strap ()
+    hk_uart_holder()
+    hk_uart_strap ()
     hc4_oled_holder(side,floorthick)
     hk_wb2()
     hc4_oled()
@@ -56,7 +56,7 @@ module hk_uart_holder() {
 
     
 /* odroid uart strap for holder */
-module uart_strap() { 
+module hk_uart_strap() { 
     difference () {
         translate ([-4.5,17,9]) cube([27,6,3]);
         translate ([-1.5,20,8]) cylinder (r=1.6, h=5, $fn=90);

lib/shape.scad

@@ -3,7 +3,7 @@
     slab(size, radius)
     slab_r(size, radius)
     slot(hole,length,depth)
-    punchout(width,depth,gap,thick,fillet,shape)
+    knockout(width,depth,gap,thick,fillet,shape)
     hdmi_open(hdmi_style)
     microusb_open()
 
@@ -55,8 +55,8 @@ module slot(hole,length,depth) {
         }
     } 
 
-// punchout opening
-module punchout(width,depth,gap,thick,fillet,shape) {
+// knockout opening
+module knockout(width,depth,gap,thick,fillet,shape) {
     
     adjust = .01;
     $fn=90;