From 939ad8bfd640ed55116703a58f87af06e75ef87e Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Tue, 3 Jul 2012 21:01:01 -0700 Subject: [PATCH] altos: Crank up the gaussian noise in the FEC test This lets us check to make sure our receive performance isn't degrading at all, instead of just making sure we can receive perfect packets well. Signed-off-by: Keith Packard --- src/test/ao_fec_test.c | 54 ++++++++++++++++++++++++------------------ 1 file changed, 31 insertions(+), 23 deletions(-) diff --git a/src/test/ao_fec_test.c b/src/test/ao_fec_test.c index 671fcafc..b94b16dc 100644 --- a/src/test/ao_fec_test.c +++ b/src/test/ao_fec_test.c @@ -283,6 +283,11 @@ ao_real_packet(void) return ok; } +#define EXPECT_DECODE_FAIL 0 +#define EXPECT_CRC_MISMATCH 6386 +#define EXPECT_DATA_MISMATCH 0 +#define NOISE_AMOUNT 0x50 + int main(int argc, char **argv) { @@ -298,13 +303,15 @@ main(int argc, char **argv) int transmit_len; uint8_t receive[EXPAND_LEN(sizeof(original))]; - int receive_len, receive_errors; + int receive_len; uint8_t decode[DECODE_LEN(sizeof(original))]; int decode_ok; int errors = 0; - int error; + int decode_fail = 0; + int crc_mismatch = 0; + int data_mismatch = 0; if (!ao_real_packet()) errors++; @@ -322,37 +329,38 @@ main(int argc, char **argv) transmit_len = ao_expand(encode, encode_len, transmit); /* Add gaussian noise to the signal */ - receive_errors = ao_fuzz(transmit, transmit_len, receive, 0x38); + (void) ao_fuzz(transmit, transmit_len, receive, NOISE_AMOUNT); receive_len = transmit_len; /* Decode it */ decode_ok = ao_fec_decode(receive, receive_len, decode, original_len + 2, NULL); /* Check to see if we received the right data */ - error = 0; - if (!decode_ok) { - printf ("decode failed\n"); - error++; - } + if (!decode_ok) + decode_fail++; + else if (decode[original_len +1] != AO_FEC_DECODE_CRC_OK) + crc_mismatch++; + else if (memcmp(original, decode, original_len) != 0) + data_mismatch++; + } - if (decode[original_len +1] != AO_FEC_DECODE_CRC_OK) { - printf ("crc mis-match\n"); - error++; - } - if (memcmp(original, decode, original_len) != 0) { - printf ("data mis-match\n"); - error++; - } - if (error) { - printf ("Errors: %d\n", receive_errors); - ao_fec_dump_bytes(original, original_len, "Input"); - ao_fec_dump_bytes(decode, original_len, "Decode"); - errors += error; - } - } printf ("%d packets coded\n", trial); + printf ("decode_fail %d crc_mismatch %d data_mismatch %d\n", + decode_fail, crc_mismatch, data_mismatch); + if (decode_fail != EXPECT_DECODE_FAIL) { + printf ("expected %d decode failures\n", EXPECT_DECODE_FAIL); + errors++; + } + if (crc_mismatch != EXPECT_CRC_MISMATCH) { + printf ("expected %d crc mismatch\n", EXPECT_CRC_MISMATCH); + errors++; + } + if (data_mismatch != EXPECT_DATA_MISMATCH) { + printf ("expected %d data mismatch\n", EXPECT_DATA_MISMATCH); + errors++; + } return errors; } -- 2.30.2