pxt-calliope/editor/extension.ts
Michał Moskal 9f87ec52db
Fix flashing after microbit reset (#1108)
* Fix flashing after microbit reset

* Remove debug out
2018-08-21 11:58:52 -07:00

762 lines
29 KiB
TypeScript

/// <reference path="../node_modules/pxt-core/built/pxteditor.d.ts" />
interface Math {
imul(x: number, y: number): number;
}
namespace pxt.editor {
import UF2 = pxtc.UF2;
const pageSize = 1024;
const numPages = 256;
function murmur3_core(data: Uint8Array) {
let h0 = 0x2F9BE6CC;
let h1 = 0x1EC3A6C8;
for (let i = 0; i < data.length; i += 4) {
let k = HF2.read32(data, i) >>> 0
k = Math.imul(k, 0xcc9e2d51);
k = (k << 15) | (k >>> 17);
k = Math.imul(k, 0x1b873593);
h0 ^= k;
h1 ^= k;
h0 = (h0 << 13) | (h0 >>> 19);
h1 = (h1 << 13) | (h1 >>> 19);
h0 = (Math.imul(h0, 5) + 0xe6546b64) >>> 0;
h1 = (Math.imul(h1, 5) + 0xe6546b64) >>> 0;
}
return [h0, h1]
}
class DAPWrapper {
cortexM: DapJS.CortexM
packetIo: HF2.PacketIO;
cmsisdap: any;
flashing = true;
pbuf = new U.PromiseBuffer<Uint8Array>();
private useSerial = true;
constructor(h: HF2.PacketIO) {
this.packetIo = h;
h.onData = buf => {
// console.log("RD: " + pxt.Util.toHex(buf))
this.pbuf.push(buf);
}
this.allocDAP()
const readSerial = () => {
if (!this.useSerial) {
return
}
if (this.flashing) {
setTimeout(readSerial, 300)
return
}
this.cmsisdap.cmdNums(0x83, [])
.then((r: number[]) => {
const len = r[1]
let str = ""
for (let i = 2; i < len + 2; ++i) {
str += String.fromCharCode(r[i])
}
if (str.length > 0) {
U.nextTick(readSerial)
window.postMessage({
type: 'serial',
id: 'n/a', // TODO
data: str
}, "*")
// console.log("SERIAL: " + str)
} else
setTimeout(readSerial, 50)
}, (err: any) => {
setTimeout(readSerial, 1000)
})
}
readSerial()
}
private allocDAP() {
/*
let sendMany = (cmds: Uint8Array[]) => {
return h.talksAsync(cmds.map(c => ({ cmd: 0, data: c })));
}
if (!h.talksAsync)
sendMany = null;
*/
let dev = new DapJS.DAP({
write: writeAsync,
close: this.disconnectAsync,
read: readAsync,
//sendMany: sendMany
});
this.cmsisdap = (dev as any).dap;
this.cortexM = new DapJS.CortexM(dev);
let h = this.packetIo
let pbuf = this.pbuf
function writeAsync(data: ArrayBuffer) {
// console.log("WR: " + pxt.Util.toHex(new Uint8Array(data)));
return h.sendPacketAsync(new Uint8Array(data));
}
function readAsync() {
return pbuf.shiftAsync();
}
}
reconnectAsync(first: boolean) {
// configure serial at 115200
if (!first)
return this.packetIo.reconnectAsync()
.then(() => this.allocDAP())
.then(() => this.cortexM.init())
.then(() => this.cmsisdap.cmdNums(0x82, [0x00, 0xC2, 0x01, 0x00]))
.then(() => { }, err => { this.useSerial = false })
else
return this.cortexM.init()
.then(() => this.cmsisdap.cmdNums(0x82, [0x00, 0xC2, 0x01, 0x00]))
.then(() => { }, err => { this.useSerial = false })
}
disconnectAsync() {
return this.packetIo.disconnectAsync();
}
}
let packetIoPromise: Promise<pxt.HF2.PacketIO>;
function initPacketIOAsync(): Promise<pxt.HF2.PacketIO> {
if (!packetIoPromise) {
packetIoPromise = pxt.HF2.mkPacketIOAsync()
.catch(err => {
packetIoPromise = null;
return Promise.reject(err);
});
return packetIoPromise;
} else {
let packetIo: pxt.HF2.PacketIO;
return packetIoPromise
.then((io) => {
packetIo = io;
return io.reconnectAsync();
})
.then(() => packetIo);
}
}
let previousDapWrapper: DAPWrapper;
function dapAsync() {
if (previousDapWrapper)
return Promise.resolve(previousDapWrapper)
return Promise.resolve()
.then(() => {
if (previousDapWrapper) {
return previousDapWrapper.disconnectAsync()
.finally(() => {
previousDapWrapper = null;
});
}
return Promise.resolve();
})
.then(() => initPacketIOAsync())
.then(h => {
let w = new DAPWrapper(h)
previousDapWrapper = w;
return w.reconnectAsync(true)
.then(() => {
return w
})
})
}
function canHID(): boolean {
let r = false
if (pxt.usb.isEnabled) {
r = true
} else if (U.isNodeJS) {
r = true
} else {
const forceHexDownload = /forceHexDownload/i.test(window.location.href);
const isUwp = !!(window as any).Windows;
if (Cloud.isLocalHost() && Cloud.localToken && !forceHexDownload || isUwp)
r = true
}
return r;
}
function initAsync() {
if (canHID()) {
return dapAsync();
} else {
return Promise.reject(new Error("no HID"))
}
}
function pageAlignBlocks(blocks: UF2.Block[], pageSize: number) {
U.assert(pageSize % 256 == 0)
let res: UF2.Block[] = []
for (let i = 0; i < blocks.length;) {
let b0 = blocks[i]
let newbuf = new Uint8Array(pageSize)
let startPad = b0.targetAddr & (pageSize - 1)
let newAddr = b0.targetAddr - startPad
for (; i < blocks.length; ++i) {
let b = blocks[i]
if (b.targetAddr + b.payloadSize > newAddr + pageSize)
break
U.memcpy(newbuf, b.targetAddr - newAddr, b.data, 0, b.payloadSize)
}
let bb = U.flatClone(b0)
bb.data = newbuf
bb.targetAddr = newAddr
bb.payloadSize = pageSize
res.push(bb)
}
return res
}
const flashPageBINquick = new Uint32Array([
0xbe00be00, // bkpt - LR is set to this
0x2480b5f0, 0x00e42300, 0x58cd58c2, 0xd10342aa, 0x42a33304, 0xbdf0d1f8,
0x4b162502, 0x509d4a16, 0x2d00591d, 0x24a1d0fc, 0x511800e4, 0x3cff3c09,
0x591e0025, 0xd0fc2e00, 0x509c2400, 0x2c00595c, 0x2401d0fc, 0x509c2580,
0x595c00ed, 0xd0fc2c00, 0x00ed2580, 0x002e2400, 0x5107590f, 0x2f00595f,
0x3404d0fc, 0xd1f742ac, 0x50992100, 0x2a00599a, 0xe7d0d0fc, 0x4001e000,
0x00000504,
])
// doesn't check if data is already there - for timing
const flashPageBIN = new Uint32Array([
0xbe00be00, // bkpt - LR is set to this
0x2402b5f0, 0x4a174b16, 0x2480509c, 0x002500e4, 0x2e00591e, 0x24a1d0fc,
0x511800e4, 0x2c00595c, 0x2400d0fc, 0x2480509c, 0x002500e4, 0x2e00591e,
0x2401d0fc, 0x595c509c, 0xd0fc2c00, 0x00ed2580, 0x002e2400, 0x5107590f,
0x2f00595f, 0x3404d0fc, 0xd1f742ac, 0x50992100, 0x2a00599a, 0xbdf0d0fc,
0x4001e000, 0x00000504,
])
// void computeHashes(uint32_t *dst, uint8_t *ptr, uint32_t pageSize, uint32_t numPages)
const computeChecksums2 = new Uint32Array([
0x4c27b5f0, 0x44a52680, 0x22009201, 0x91004f25, 0x00769303, 0x24080013,
0x25010019, 0x40eb4029, 0xd0002900, 0x3c01407b, 0xd1f52c00, 0x468c0091,
0xa9044665, 0x506b3201, 0xd1eb42b2, 0x089b9b01, 0x23139302, 0x9b03469c,
0xd104429c, 0x2000be2a, 0x449d4b15, 0x9f00bdf0, 0x4d149e02, 0x49154a14,
0x3e01cf08, 0x2111434b, 0x491341cb, 0x405a434b, 0x4663405d, 0x230541da,
0x4b10435a, 0x466318d2, 0x230541dd, 0x4b0d435d, 0x2e0018ed, 0x6002d1e7,
0x9a009b01, 0x18d36045, 0x93003008, 0xe7d23401, 0xfffffbec, 0xedb88320,
0x00000414, 0x1ec3a6c8, 0x2f9be6cc, 0xcc9e2d51, 0x1b873593, 0xe6546b64,
])
let startTime = 0
function log(msg: string) {
let now = Date.now()
if (!startTime) startTime = now
now -= startTime
let ts = ("00000" + now).slice(-5)
pxt.log(`HID ${ts}: ${msg}`)
}
const membase = 0x20000000
const loadAddr = membase
const dataAddr = 0x20002000
const stackAddr = 0x20001000
export const bufferConcat = (bufs: Uint8Array[]) => {
let len = 0;
for (const b of bufs) {
len += b.length;
}
const r = new Uint8Array(len);
len = 0;
for (const b of bufs) {
r.set(b, len);
len += b.length;
}
return r;
};
function getFlashChecksumsAsync(wrap: DAPWrapper) {
log("getting existing flash checksums")
let pages = numPages
return wrap.cortexM.runCode(computeChecksums2, loadAddr, loadAddr + 1, 0xffffffff, stackAddr, true,
dataAddr, 0, pageSize, pages)
.then(() => wrap.cortexM.memory.readBlock(dataAddr, pages * 2, pageSize))
}
function onlyChanged(blocks: UF2.Block[], checksums: Uint8Array) {
return blocks.filter(b => {
let idx = b.targetAddr / pageSize
U.assert((idx | 0) == idx)
U.assert(b.data.length == pageSize)
if (idx * 8 + 8 > checksums.length)
return true // out of range?
let c0 = HF2.read32(checksums, idx * 8)
let c1 = HF2.read32(checksums, idx * 8 + 4)
let ch = murmur3_core(b.data)
if (c0 == ch[0] && c1 == ch[1])
return false
return true
})
}
export function deployCoreAsync(resp: pxtc.CompileResult): Promise<void> {
let saveHexAsync = () => {
return pxt.commands.saveOnlyAsync(resp)
}
startTime = 0
let wrap: DAPWrapper
log("init")
let logV = (msg: string) => { }
//let logV = log
const runFlash = (b: UF2.Block, dataAddr: number) => {
const cmd = wrap.cortexM.prepareCommand();
cmd.halt();
cmd.writeCoreRegister(DapJS.CortexReg.PC, loadAddr + 4 + 1);
cmd.writeCoreRegister(DapJS.CortexReg.LR, loadAddr + 1);
cmd.writeCoreRegister(DapJS.CortexReg.SP, stackAddr);
cmd.writeCoreRegister(0, b.targetAddr);
cmd.writeCoreRegister(1, dataAddr);
return Promise.resolve()
.then(() => {
logV("setregs")
return cmd.go()
})
.then(() => {
logV("dbg en")
// starts the program
return wrap.cortexM.debug.enable()
})
}
let checksums: Uint8Array
pxt.tickEvent("hid.flash.start");
return Promise.resolve()
.then(() => {
if (previousDapWrapper) {
previousDapWrapper.flashing = true
return Promise.delay(100)
}
return Promise.resolve()
})
.then(initAsync)
.then(w => {
wrap = w
log("reset")
return wrap.cortexM.init()
.then(() => wrap.cortexM.reset(true))
.catch(e => {
log("trying re-connect")
return wrap.reconnectAsync(false)
.then(() => wrap.cortexM.reset(true))
})
})
.then(() => wrap.cortexM.memory.readBlock(0x10001014, 1, pageSize))
.then(v => {
if (HF2.read32(v, 0) != 0x3C000) {
pxt.tickEvent("hid.flash.uicrfail");
U.userError(U.lf("Please flash any MakeCode hex file using drag and drop. Flashing from app will work afterwards."))
}
})
.then(() => getFlashChecksumsAsync(wrap))
.then(buf => {
checksums = buf
log("write code")
return wrap.cortexM.memory.writeBlock(loadAddr, flashPageBIN)
})
.then(() => {
log("convert")
// TODO this is seriously inefficient (130ms on a fast machine)
let uf2 = UF2.newBlockFile()
UF2.writeHex(uf2, resp.outfiles[pxtc.BINARY_HEX].split(/\r?\n/))
let bytes = U.stringToUint8Array(UF2.serializeFile(uf2))
let parsed = UF2.parseFile(bytes)
let aligned = pageAlignBlocks(parsed, pageSize)
log(`initial: ${aligned.length} pages`)
aligned = onlyChanged(aligned, checksums)
log(`incremental: ${aligned.length} pages`)
return Promise.mapSeries(U.range(aligned.length),
i => {
let b = aligned[i]
if (b.targetAddr >= 0x10000000)
return Promise.resolve()
logV("about to write at 0x" + b.targetAddr.toString(16))
let writeBl = Promise.resolve()
let thisAddr = (i & 1) ? dataAddr : dataAddr + pageSize
let nextAddr = (i & 1) ? dataAddr + pageSize : dataAddr
if (i == 0) {
let u32data = new Uint32Array(b.data.length / 4)
for (let i = 0; i < b.data.length; i += 4)
u32data[i >> 2] = HF2.read32(b.data, i)
writeBl = wrap.cortexM.memory.writeBlock(thisAddr, u32data)
}
return writeBl
.then(() => runFlash(b, thisAddr))
.then(() => {
let next = aligned[i + 1]
if (!next)
return Promise.resolve()
logV("write next")
let buf = new Uint32Array(next.data.buffer)
return wrap.cortexM.memory.writeBlock(nextAddr, buf)
})
.then(() => {
logV("wait")
return wrap.cortexM.waitForHalt(500)
})
.then(() => {
logV("done block")
})
})
.then(() => {
log("flash done")
pxt.tickEvent("hid.flash.done");
return wrap.cortexM.reset(false)
})
.then(() => {
wrap.flashing = false;
})
})
.catch(e => {
// TODO: (microbit master)
if (e.type === "devicenotfound") { //&& d.reportDeviceNotFoundAsync) {
pxt.tickEvent("hid.flash.devicenotfound");
//return d.reportDeviceNotFoundAsync("/device/windows-app/troubleshoot", resp);
return undefined;
} else {
return saveHexAsync()
}
})
}
/**
* <block type="device_show_leds">
<field name="LED00">FALSE</field>
<field name="LED10">FALSE</field>
<field name="LED20">FALSE</field>
<field name="LED30">FALSE</field>
<field name="LED40">FALSE</field>
<field name="LED01">FALSE</field>
<field name="LED11">FALSE</field>
<field name="LED21">FALSE</field>
<field name="LED31">TRUE</field>
<field name="LED41">FALSE</field>
<field name="LED02">FALSE</field>
<field name="LED12">FALSE</field>
<field name="LED22">FALSE</field>
<field name="LED32">FALSE</field>
<field name="LED42">FALSE</field>
<field name="LED03">FALSE</field>
<field name="LED13">TRUE</field>
<field name="LED23">FALSE</field>
<field name="LED33">FALSE</field>
<field name="LED43">FALSE</field>
<field name="LED04">FALSE</field>
<field name="LED14">FALSE</field>
<field name="LED24">FALSE</field>
<field name="LED34">FALSE</field>
<field name="LED44">FALSE</field>
</block>
to
<block type="device_show_leds">
<field name="LEDS">`
# # # # #
. . . . #
. . . . .
. . . . #
. . . . #
`
</field>
</block>
*/
function patchBlocks(pkgTargetVersion: string, dom: Element) {
// is this a old script?
if (pxt.semver.majorCmp(pkgTargetVersion || "0.0.0", "1.0.0") >= 0) return;
// showleds
const nodes = U.toArray(dom.querySelectorAll("block[type=device_show_leds]"))
.concat(U.toArray(dom.querySelectorAll("block[type=device_build_image]")))
.concat(U.toArray(dom.querySelectorAll("block[type=device_build_big_image]")))
nodes.forEach(node => {
// don't rewrite if already upgraded, eg. field LEDS already present
if (U.toArray(node.children).filter(child => child.tagName == "field" && "LEDS" == child.getAttribute("name"))[0])
return;
// read LEDxx value and assmebly into a new field
const leds: string[][] = [[], [], [], [], []];
U.toArray(node.children)
.filter(child => child.tagName == "field" && /^LED\d+$/.test(child.getAttribute("name")))
.forEach(lednode => {
let n = lednode.getAttribute("name");
let col = parseInt(n[3]);
let row = parseInt(n[4]);
leds[row][col] = lednode.innerHTML == "TRUE" ? "#" : ".";
// remove node
node.removeChild(lednode);
});
// add new field
const f = node.ownerDocument.createElement("field");
f.setAttribute("name", "LEDS");
const s = '`\n' + leds.map(row => row.join('')).join('\n') + '\n`';
f.appendChild(node.ownerDocument.createTextNode(s));
node.insertBefore(f, null);
});
// radio
/*
<block type="radio_on_packet" x="174" y="120">
<mutation callbackproperties="receivedNumber" renamemap="{}"></mutation>
<field name="receivedNumber">receivedNumber</field>
</block>
<block type="radio_on_packet" disabled="true" x="127" y="263">
<mutation callbackproperties="receivedString,receivedNumber" renamemap="{&quot;receivedString&quot;:&quot;name&quot;,&quot;receivedNumber&quot;:&quot;value&quot;}"></mutation>
<field name="receivedString">name</field>
<field name="receivedNumber">value</field>
</block>
<block type="radio_on_packet" disabled="true" x="162" y="420">
<mutation callbackproperties="receivedString" renamemap="{}"></mutation>
<field name="receivedString">receivedString</field>
</block>
converts to
<block type="radio_on_number" x="196" y="208">
<field name="HANDLER_receivedNumber" id="DCy(W;1)*jLWQUpoy4Mm" variabletype="">receivedNumber</field>
</block>
<block type="radio_on_value" x="134" y="408">
<field name="HANDLER_name" id="*d-Jm^MJXO]Djs(dTR*?" variabletype="">name</field>
<field name="HANDLER_value" id="A6HQjH[k^X43o3h775+G" variabletype="">value</field>
</block>
<block type="radio_on_string" x="165" y="583">
<field name="HANDLER_receivedString" id="V9KsE!h$(iO?%W:[32CV" variabletype="">receivedString</field>
</block>
*/
const varids: pxt.Map<string> = {};
function addField(node: Element, renameMap: pxt.Map<string>, name: string) {
const f = node.ownerDocument.createElement("field");
f.setAttribute("name", "HANDLER_" + name)
f.setAttribute("id", varids[renameMap[name] || name]);
f.appendChild(node.ownerDocument.createTextNode(name));
node.appendChild(f);
}
U.toArray(dom.querySelectorAll("variable")).forEach(node => varids[node.innerHTML] = node.getAttribute("id"));
U.toArray(dom.querySelectorAll("block[type=radio_on_packet]"))
.forEach(node => {
const mutation = node.querySelector("mutation");
if (!mutation) return;
const renameMap = JSON.parse(node.getAttribute("renamemap") || "{}");
const props = mutation.getAttribute("callbackproperties");
if (props) {
const parts = props.split(",");
// It's tempting to generate radio_on_number if parts.length === 0 but
// that would create a variable named "receivedNumber" and possibly shadow
// an existing variable in the user's program. It's safer to stick to the
// old block.
if (parts.length === 1) {
if (parts[0] === "receivedNumber") {
node.setAttribute("type", "radio_on_number");
node.removeChild(node.querySelector("field[name=receivedNumber]"));
addField(node, renameMap, "receivedNumber");
}
else if (parts[0] === "receivedString") {
node.setAttribute("type", "radio_on_string");
node.removeChild(node.querySelector("field[name=receivedString]"));
addField(node, renameMap, "receivedString");
}
else {
return;
}
node.removeChild(mutation);
}
else if (parts.length === 2 && parts.indexOf("receivedNumber") !== -1 && parts.indexOf("receivedString") !== -1) {
node.setAttribute("type", "radio_on_value");
node.removeChild(node.querySelector("field[name=receivedNumber]"));
node.removeChild(node.querySelector("field[name=receivedString]"));
addField(node, renameMap, "name");
addField(node, renameMap, "value");
node.removeChild(mutation);
}
}
})
// device_random now refers to randomRange() so we need to add the missing lower bound argument
U.toArray(dom.querySelectorAll("block[type=device_random]"))
.forEach(node => {
if (getValue(node, "min")) return;
const v = node.ownerDocument.createElement("value");
v.setAttribute("name", "min");
addNumberShadow(v);
node.appendChild(v);
});
/*
<block type="math_arithmetic">
<field name="OP">DIVIDE</field>
<value name="A">
<shadow type="math_number"><field name="NUM">0</field></shadow>
<block type="math_number"><field name="NUM">2</field></block>
</value>
<value name="B">
<shadow type="math_number"><field name="NUM">1</field></shadow>
<block type="math_number"><field name="NUM">3</field></block>
</value>
</block>
*/
U.toArray(dom.querySelectorAll("block[type=math_arithmetic]"))
.forEach(node => {
const op = getField(node, "OP");
if (!op || op.textContent.trim() !== "DIVIDE") return;
// Convert to integer division
/*
<block type="math_js_op">
<mutation op-type="infix"></mutation>
<field name="OP">idiv</field>
<value name="ARG0">
<shadow type="math_number"><field name="NUM">0</field></shadow>
</value>
<value name="ARG1">
<shadow type="math_number"><field name="NUM">0</field></shadow>
</value>
</block>
*/
node.setAttribute("type", "math_js_op");
op.textContent = "idiv";
const mutation = node.ownerDocument.createElement("mutation");
mutation.setAttribute("op-type", "infix");
// mutation has to be first or Blockly will drop the second argument
node.insertBefore(mutation, node.firstChild);
const a = getValue(node, "A");
if (a) a.setAttribute("name", "ARG0");
const b = getValue(node, "B");
if (b) b.setAttribute("name", "ARG1");
})
}
initExtensionsAsync = function (opts: pxt.editor.ExtensionOptions): Promise<pxt.editor.ExtensionResult> {
pxt.debug('loading microbit target extensions...')
if (!Math.imul)
Math.imul = function (a, b) {
const ah = (a >>> 16) & 0xffff;
const al = a & 0xffff;
const bh = (b >>> 16) & 0xffff;
const bl = b & 0xffff;
// the shift by 0 fixes the sign on the high part
// the final |0 converts the unsigned value into a signed value
return ((al * bl) + (((ah * bl + al * bh) << 16) >>> 0) | 0);
};
const res: pxt.editor.ExtensionResult = {
hexFileImporters: [{
id: "blockly",
canImport: data => data.meta.cloudId == "microbit.co.uk" && data.meta.editor == "blockly",
importAsync: (project, data) => project.createProjectAsync({
filesOverride: {
"main.blocks": data.source
}, name: data.meta.name
})
}]
};
pxt.usb.setFilters([{
vendorId: 0x0D28,
productId: 0x0204,
classCode: 0xff,
subclassCode: 0x03
}])
if (canHID())
pxt.commands.deployCoreAsync = (r: pxtc.CompileResult, d: pxt.commands.DeployOptions): Promise<void> => {
return deployCoreAsync(r)
.timeout(18000)
.catch((e) => {
return previousDapWrapper.reconnectAsync(true)
.catch((e) => {
// Best effort disconnect; at this point we don't even know the state of the device
pxt.reportException(e);
})
.then(() => {
return r.confirmAsync({
header: lf("Something went wrong..."),
body: lf("Flashing your {0} took too long. Please disconnect your {0} from your computer and try reconnecting it.", pxt.appTarget.appTheme.boardName || lf("device")),
disagreeLbl: lf("Ok"),
hideAgree: true
});
})
.then(() => {
return pxt.commands.saveOnlyAsync(r);
});
});
}
res.blocklyPatch = patchBlocks;
return Promise.resolve<pxt.editor.ExtensionResult>(res);
}
function getField(parent: Element, name: string) {
return getFieldOrValue(parent, name, true);
}
function getValue(parent: Element, name: string) {
return getFieldOrValue(parent, name, false);
}
function getFieldOrValue(parent: Element, name: string, isField: boolean) {
const nodeType = isField ? "field" : "value";
for (let i = 0; i < parent.children.length; i++) {
const child = parent.children.item(i);
if (child.tagName === nodeType && child.getAttribute("name") === name) {
return child;
}
}
return undefined;
}
function addNumberShadow(valueNode: Element) {
const s = valueNode.ownerDocument.createElement("shadow");
s.setAttribute("type", "math_number");
const f = valueNode.ownerDocument.createElement("field");
f.setAttribute("name", "NUM");
f.textContent = "0";
s.appendChild(f);
valueNode.appendChild(s);
}
}