# Battery B (hold / pure status read): 64x10 + 2048 fill + 400ms HOLD + 2048 canary
# + 0.3s + tail 64x10. During the hold the buffer is empty when the probe lands,
# so the probe is a pure GET_RECV_LEN (no data movement). If a pure status read inside
# the post-drain re-arm window still wedges the chip, the canary stalls.
from probe_bench_lib import *

def main():
    s = connect()
    if not send_rounds64(s, 10, 0, "R"):
        finish(s, 1)
    f1 = pattern(640, 2048)
    s.sendall(f1)
    rx, stalled = wait_step(s, 2048, "F1", 3.0)
    if stalled or rx != f1:
        hexdump(rx)
        finish(s, 1)
    time.sleep(0.40)  # hold: probe lands on the EMPTY buffer (pure status read)
    f2 = pattern(2688, 2048)  # canary fill (exact window size)
    s.sendall(f2)
    time.sleep(0.30)
    tail_base = 2688 + 2048
    for i in range(10):
        s.sendall(pattern(tail_base + i * 64, 64))
    rx, stalled = wait_step(s, 2688, "F2+TAIL", 4.0)
    hexdump(rx)
    finish(s, 0)

main()