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wip(picow): Phase 3 diagnosis — harness function histogram + active() probes 

Pins the connect blocker: zero F2 transfers (F0=11 F1=97 F2=0), so the host
never sends an IOCTL — it stalls on SDPCM bus credits in clm_load (STATUS shows
no F2_PACKET_AVAILABLE) and times out, so wifi_on fails and active() stays
False. Next: make the credit-granting frame visible in SPI_STATUS during the
stall. See project/picow-wifi-emulation/findings.md F-13.
This commit is contained in:
David Montero 2026-06-12 20:15:12 +02:00
parent 9197fcaaf6
commit 847c2b894b
1 changed files with 25 additions and 14 deletions
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39
frontend/src/__tests__/picow-cyw43-boot-harness.investigate.test.ts
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@ -48,15 +48,20 @@ const INJECT_CODE = [
'import network, time',
'print("STEP_IMPORT_OK")',
'w=network.WLAN(network.STA_IF)',
'print("STEP_WLAN_OBJ_OK")',
'w.active(True)',
'print("STEP_ACTIVE active=" + str(w.active()))',
'w.connect("Velxio-GUEST", "")',
'print("STEP_CONNECT_CALLED")',
'for i in range(15):',
'print("STEP_WLAN_OBJ_OK pre_active=" + str(w.active()))',
'try:',
' w.active(True)',
' print("STEP_ACTIVE active=" + str(w.active()) + " status=" + str(w.status()))',
'except Exception as e:',
' print("ACTIVE_EXC " + repr(e))',
'try:',
' w.connect("Velxio-GUEST", "")',
' print("STEP_CONNECT_CALLED status=" + str(w.status()))',
'except Exception as e:',
' print("CONNECT_EXC " + repr(e))',
'for i in range(4):',
' print("POLL", i, "status", w.status(), "conn", w.isconnected())',
' time.sleep_ms(300)',
'print("STEP_IFCONFIG " + str(w.ifconfig()))',
' time.sleep_ms(200)',
'print("HARNESS_DONE")',
].join('\n');
@ -89,6 +94,7 @@ describe.skipIf(!process.env.CYW43_HARNESS)('Pico W cyw43 boot harness (investig
const rawWords: number[] = [];
const trace: string[] = [];
const f2Log: string[] = []; // F2/IOCTL transfers, NOT subject to the ring
const funcHist = [0, 0, 0, 0]; // count of decoded gSPI functions F0..F3
const cmdCounts = new Map<string, number>();
let ledOn = false;
chip.onLed((e) => { ledOn = e.on; trace.push(`** LED ${e.on ? 'ON' : 'OFF'} **`); });
@ -116,14 +122,18 @@ describe.skipIf(!process.env.CYW43_HARNESS)('Pico W cyw43 boot harness (investig
const k = key(ev.cmd);
cmdCounts.set(k, (cmdCounts.get(k) ?? 0) + 1);
} else if (ev.kind === 'payload') {
// Capture EVERY F2 transfer (IOCTLs/SDPCM) in a non-ring log.
// Histogram of decoded functions + capture EVERY F2 transfer.
funcHist[ev.cmd.function & 3]++;
if (ev.cmd.function === 2 && f2Log.length < 60) {
f2Log.push(`${ev.cmd.write ? 'WR' : 'RD'} F2 len=${ev.payload.length || ev.readBytes}`);
f2Log.push(`${ev.cmd.write ? 'WR' : 'RD'} F2 a=0x${ev.cmd.address.toString(16)} len=${ev.payload.length || ev.readBytes}`);
}
// Skip logging the ~3500 firmware-block writes (len>=64) — keep the
// trace focused on the handshake + post-download sequence.
const isFwBlock = ev.cmd.write && ev.payload.length >= 64;
if (!isFwBlock) {
// Skip the ~3500 firmware-block writes (len>=64) AND the backplane
// window-address writes (0x1000a/b/c) that bracket each block —
// keep the trace on the handshake + post-download SR/power loop.
const a = ev.cmd.address;
const isNoise = (ev.cmd.write && ev.payload.length >= 64) ||
(ev.cmd.write && (a === 0x1000a || a === 0x1000b || a === 0x1000c));
if (!isNoise) {
trace.push(`-> ${formatCmd(ev.cmd)} rxBytes=${ev.readBytes}`);
if (ev.cmd.write && ev.payload.length > 0) {
const v = (ev.payload[0] | (ev.payload[1] << 8) | (ev.payload[2] << 16) | (ev.payload[3] << 24)) >>> 0;
@ -228,6 +238,7 @@ describe.skipIf(!process.env.CYW43_HARNESS)('Pico W cyw43 boot harness (investig
'===== SERIAL OUTPUT (tail 2500) =====\n' + serial.slice(-2500) + '\n\n' +
'===== TOP COMMAND COUNTS (poll loops) =====\n' +
polls.map(([k, n]) => ` ${String(n).padStart(6)} ${k}`).join('\n') + '\n\n' +
`===== FUNCTION HISTOGRAM F0..F3 = ${funcHist.join(',')} =====\n\n` +
'===== F2/IOCTL TRANSFERS (total seen, non-ring) =====\n' +
`count=${f2Log.length}\n` + f2Log.join('\n') + '\n\n' +
'===== TRACE TAIL (post-firmware) =====\n' + trace.slice(-120).join('\n') + '\n';