Add support scripts

brick/scripts/dump.js

@@ -0,0 +1,34 @@
+#!/bin/sh
+
+let fs = require("fs")
+
+let styles = {
+  "0": "rxtx",
+  "1": "  tx",
+  "2": "rx  ",
+}
+
+function build() {
+  let kern = fs.readFileSync( "foo")
+  let off = 0x0001df30
+
+  kern = kern.slice(off + 6 * 5, off + 6 * (5 + 6))
+console.log(kern.toString("hex"))
+off = 0
+
+for (let i = 0; i < 30; ++i) {
+  if (kern[off+4] == 64) {
+    kern[off+4] = 0
+    kern[off+5] = 2
+  }
+if(kern[off] == 3 || kern[off] == 4) {
+    kern[off+4] = 0
+    kern[off+5] = 1
+} 
+  console.log(`ep=${kern[off]} style=${styles[kern[off+1]]} buf=${kern[off+2] == 0 ? "sin" : kern[off+2] == 1 ? "dbl" : "XXX"} pad=${kern[off+3]} sz=${kern[off+4]+(kern[off+5]<<8)}`)
+  off += 6
+}
+console.log(kern.toString("hex"))
+}
+
+build()

brick/scripts/img.js

@@ -0,0 +1,33 @@
+#!/bin/sh
+
+let fs = require("fs")
+
+function build() {
+  let cr = fs.readFileSync("cram.bin")
+  if (cr.length > 10878976) {
+    console.log("too big")
+    return
+  }
+  let img = fs.readFileSync("boot.bin")
+  let off = 0x250000
+  if (img[off] != 0x45 || img[off + 1] != 0x3d) {
+    console.log("bad magic: " + img[off] + " / " + img[off+1])
+    return
+  }
+
+  cr.copy(img, off)
+
+  let kern = fs.readFileSync("piggy-patched.gzip")
+  off = 0x0005540f
+
+  if (img[off] != kern[0] || img[off+1] != kern[1]) {
+    console.log("bad kernel magic: " + img[off] + " / " + img[off+1])
+    return
+  }
+
+  kern.copy(img, off)
+
+  fs.writeFileSync("firmware.bin", img)
+}
+
+build()

brick/scripts/mkimg

@@ -0,0 +1,4 @@
+#!/bin/sh
+sudo mkfs.cramfs dev-ev3 cram.bin
+node img
+ls -l firmware.bin

brick/scripts/patchkern.js

@@ -0,0 +1,8 @@
+let small = "010100000004010200000004020100004000020200004000030100000004040000008000"
+let big   = "010100000004010200000004020100000002020200000002030100000001040000000001"
+
+let fs = require("fs")
+
+let kern = fs.readFileSync( "foo")
+let kern2 = new Buffer(kern.toString("hex").replace(small, big), "hex")
+fs.writeFileSync("foo2", kern2)