def tt_write_file(p, fileno, buf, expect_end=True, debug=False):
# strange ordering: file 0x001234ab (ttwatch naming) becomes 0012ab34
assert (fileno >> 24) == 0
cmdno = bytearray(
(0, (fileno >> 16) & 0xff, fileno & 0xff, (fileno >> 8) & 0xff))
tt_send_command(p, cmdno)
l = len(buf)
p.wr(0x28, struct.pack('<L', len(buf))) # 0x28 = length in/out
counter = 0
startat = time.time()
checker = tt_crc16_streamer()
for ii in range(0, l, 256 * 20 - 2):
# write up to 256*20-2 data bytes in 20B chunks
end = min(l, ii + 256 * 20 - 2)
for jj in range(ii, end, 20):
out = buf[jj:min(jj + 20, end)]
checker.update(out)
if jj + 20 >= end:
out += struct.pack('<H', checker.digest())
p.wr(0x2b, out[:20])
if len(out) > 20: p.wr(0x2b, out[20:])
if debug > 1:
print "%04x: %s %s" % (jj, hexlify(out), repr(out))
# check CRC16 and ack
checker.reset()
counter += 1
if end < l or expect_end:
rda(p, 0x2e, idata=counter, timeout=20)
if debug:
print "%d: wrote %d/%d bytes so far (%d/sec)" % (
counter, end, l, end // (time.time() - startat))
rda(p, 0x25, idata=0)
return end
def tt_read_file(p, fileno, outf, limit=None, debug=False):
# strange ordering: file 0x001234ab (ttwatch naming) becomes 0012ab34
assert (fileno >> 24) == 0
cmdno = bytearray(
(1, (fileno >> 16) & 0xff, fileno & 0xff, (fileno >> 8) & 0xff))
tt_send_command(p, cmdno)
l = rda(p, 0x28).idata # 0x28 = length in/out
counter = 0
startat = time.time()
checker = tt_crc16_streamer()
for ii in range(0, l, 256 * 20 - 2):
# read up to 256*20-2 data bytes in 20B chunks
end = min(l, ii + 256 * 20 - 2)
for jj in range(ii, end, 20):
d = rda(p, 0x2b).data
if (end - jj - len(d)) in (-1, 0):
d += rda(p, 0x2b).data # tack on CRC16 straggler byte(s)
outf.write(d[:min(end - jj, 20)])
checker.update(d)
if debug > 1:
print "%04x: %s %s" % (jj, hexlify(d), repr(d))
# check CRC16 and ack
if checker.digest() != 0:
raise AssertionError, checker.hexdigest()
checker.reset()
counter += 1
p.wr(0x2e, struct.pack('<L', counter), False)
if debug:
print "%d: read %d/%d bytes so far (%d/sec)" % (
counter, end, l, end // (time.time() - startat))
rda(p, 0x25, idata=0)
return end
def tt_write_file(p, fileno, buf, expect_end=True, debug=False):
# strange ordering: file 0x001234ab (ttwatch naming) becomes 0012ab34
assert (fileno>>24)==0
cmdno = bytearray((0, (fileno>>16)&0xff, fileno&0xff, (fileno>>8)&0xff))
tt_send_command(p, cmdno)
l = len(buf)
p.wr(0x28, struct.pack('<L', len(buf))) # 0x28 = length in/out
counter = 0
startat = time.time()
checker = tt_crc16_streamer()
for ii in range(0, l, 256*20-2):
# write up to 256*20-2 data bytes in 20B chunks
end = min(l, ii+256*20-2)
for jj in range(ii, end, 20):
out = buf[jj : min(jj+20, end)]
checker.update(out)
if jj+20>=end:
out += struct.pack('<H', checker.digest())
p.wr(0x2b, out[:20])
if len(out)>20: p.wr(0x2b, out[20:])
if debug>1:
print "%04x: %s %s" % (jj, hexlify(out), repr(out))
# check CRC16 and ack
checker.reset()
counter += 1
if end<l or expect_end:
rda(p, 0x2e, idata=counter, timeout=20)
if debug:
print "%d: wrote %d/%d bytes so far (%d/sec)" % (counter, end, l, end // (time.time()-startat))
rda(p, 0x25, idata=0)
return end
def tt_read_file(p, fileno, outf, limit=None, debug=False):
# strange ordering: file 0x001234ab (ttwatch naming) becomes 0012ab34
assert (fileno>>24)==0
cmdno = bytearray((1, (fileno>>16)&0xff, fileno&0xff, (fileno>>8)&0xff))
tt_send_command(p, cmdno)
l = rda(p, 0x28).idata # 0x28 = length in/out
counter = 0
startat = time.time()
checker = tt_crc16_streamer()
for ii in range(0, l, 256*20-2):
# read up to 256*20-2 data bytes in 20B chunks
end = min(l, ii+256*20-2)
for jj in range(ii, end, 20):
d = rda(p, 0x2b).data
if (end-jj-len(d)) in (-1, 0):
d += rda(p, 0x2b).data # tack on CRC16 straggler byte(s)
outf.write( d[ : min(end-jj,20) ] )
checker.update(d)
if debug>1:
print "%04x: %s %s" % (jj, hexlify(d), repr(d))
# check CRC16 and ack
if checker.digest()!=0:
raise AssertionError, checker.hexdigest()
checker.reset()
counter += 1
p.wr(0x2e, struct.pack('<L', counter), False)
if debug:
print "%d: read %d/%d bytes so far (%d/sec)" % (counter, end, l, end // (time.time()-startat))
rda(p, 0x25, idata=0)
return end
