mirror of https://gerrit.osmocom.org/libosmocore
i460: Fix bit- and subslots ordering of I.460 mux + demux
When I wrote the new I.460 mux + demux code, I failed to realize that * bit numbers in relevant ITU specs start with 1 as MSB ... 8 as LSB * sub-slot 0 is bits 1+2, i.e. the two MSBs of a byte * bit-ordering within each sub-slot is also MSB first As a result, the code and test data was broken. Change-Id: I6df7dbf411efbdeaf516e72ac552432bf5a569d0
This commit is contained in:
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@ -89,32 +89,34 @@ static void demux_subchan_extract_bits(struct osmo_i460_subchan *schan, const ui
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for (i = 0; i < data_len; i++) {
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uint8_t inbyte = data[i];
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uint8_t inbits = inbyte >> schan->bit_offset;
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/* I.460 defines sub-channel 0 is using bit positions 1+2 (the two
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* most significant bits, hence we extract msb-first */
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uint8_t inbits = inbyte << schan->bit_offset;
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/* extract the bits relevant to the given schan */
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switch (schan->rate) {
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case OSMO_I460_RATE_8k:
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demux_subchan_append_bit(schan, inbits & 0x01);
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demux_subchan_append_bit(schan, inbits & 0x80);
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break;
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case OSMO_I460_RATE_16k:
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demux_subchan_append_bit(schan, inbits & 0x01);
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demux_subchan_append_bit(schan, inbits & 0x02);
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demux_subchan_append_bit(schan, inbits & 0x80);
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demux_subchan_append_bit(schan, inbits & 0x40);
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break;
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case OSMO_I460_RATE_32k:
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demux_subchan_append_bit(schan, inbits & 0x01);
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demux_subchan_append_bit(schan, inbits & 0x02);
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demux_subchan_append_bit(schan, inbits & 0x04);
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demux_subchan_append_bit(schan, inbits & 0x08);
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demux_subchan_append_bit(schan, inbits & 0x80);
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demux_subchan_append_bit(schan, inbits & 0x40);
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demux_subchan_append_bit(schan, inbits & 0x20);
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demux_subchan_append_bit(schan, inbits & 0x10);
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break;
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case OSMO_I460_RATE_64k:
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demux_subchan_append_bit(schan, inbits & 0x01);
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demux_subchan_append_bit(schan, inbits & 0x02);
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demux_subchan_append_bit(schan, inbits & 0x04);
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demux_subchan_append_bit(schan, inbits & 0x08);
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demux_subchan_append_bit(schan, inbits & 0x10);
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demux_subchan_append_bit(schan, inbits & 0x20);
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demux_subchan_append_bit(schan, inbits & 0x40);
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demux_subchan_append_bit(schan, inbits & 0x80);
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demux_subchan_append_bit(schan, inbits & 0x40);
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demux_subchan_append_bit(schan, inbits & 0x20);
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demux_subchan_append_bit(schan, inbits & 0x10);
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demux_subchan_append_bit(schan, inbits & 0x08);
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demux_subchan_append_bit(schan, inbits & 0x04);
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demux_subchan_append_bit(schan, inbits & 0x02);
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demux_subchan_append_bit(schan, inbits & 0x01);
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break;
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default:
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OSMO_ASSERT(0);
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@ -205,22 +207,25 @@ static uint8_t mux_subchan_provide_bits(struct osmo_i460_subchan *schan, uint8_t
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uint8_t outbits = 0;
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uint8_t outmask;
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/* I.460 defines sub-channel 0 is using bit positions 1+2 (the two
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* most significant bits, hence we provide msb-first */
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switch (schan->rate) {
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case OSMO_I460_RATE_8k:
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outbits = mux_schan_provide_bit(schan);
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outmask = 0x01;
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outbits = mux_schan_provide_bit(schan) << 7;
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outmask = 0x80;
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break;
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case OSMO_I460_RATE_16k:
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outbits |= mux_schan_provide_bit(schan) << 1;
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outbits |= mux_schan_provide_bit(schan) << 0;
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outmask = 0x03;
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outbits |= mux_schan_provide_bit(schan) << 7;
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outbits |= mux_schan_provide_bit(schan) << 6;
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outmask = 0xC0;
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break;
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case OSMO_I460_RATE_32k:
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outbits |= mux_schan_provide_bit(schan) << 3;
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outbits |= mux_schan_provide_bit(schan) << 2;
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outbits |= mux_schan_provide_bit(schan) << 1;
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outbits |= mux_schan_provide_bit(schan) << 0;
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outmask = 0x0F;
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outbits |= mux_schan_provide_bit(schan) << 7;
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outbits |= mux_schan_provide_bit(schan) << 6;
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outbits |= mux_schan_provide_bit(schan) << 5;
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outbits |= mux_schan_provide_bit(schan) << 4;
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outmask = 0xF0;
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break;
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case OSMO_I460_RATE_64k:
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outbits |= mux_schan_provide_bit(schan) << 7;
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@ -236,8 +241,8 @@ static uint8_t mux_subchan_provide_bits(struct osmo_i460_subchan *schan, uint8_t
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default:
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OSMO_ASSERT(0);
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}
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*mask = outmask << schan->bit_offset;
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return outbits << schan->bit_offset;
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*mask = outmask >> schan->bit_offset;
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return outbits >> schan->bit_offset;
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}
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/* provide one byte of multiplexed I.460 bits */
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@ -234,8 +234,8 @@ static void test_32k_subchan(void)
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int i;
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for (i = 0; i < sizeof(sequence); i++)
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sequence[i] = 0;
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sequence[0] = 0x0f;
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sequence[1] = 0xf0;
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sequence[0] = 0x0f;
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sequence[2] = 0xff;
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osmo_i460_demux_in(ts, sequence, sizeof(sequence));
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@ -278,10 +278,10 @@ static void test_16k_subchan(void)
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int i;
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for (i = 0; i < sizeof(sequence); i++)
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sequence[i] = 0;
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sequence[0] = 0x03;
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sequence[1] = 0x0c;
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sequence[2] = 0x30;
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sequence[3] = 0xc0;
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sequence[0] = 0xC0;
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sequence[1] = 0x30;
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sequence[2] = 0x0c;
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sequence[3] = 0x03;
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sequence[4] = 0xff;
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osmo_i460_demux_in(ts, sequence, sizeof(sequence));
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@ -328,16 +328,16 @@ static void test_8k_subchan(void)
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for (i = 0; i < sizeof(sequence); i++)
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sequence[i] = 0;
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i = 0;
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sequence[i++] = 0x01;
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sequence[i++] = 0x02;
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sequence[i++] = 0x04;
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sequence[i++] = 0x08;
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sequence[i++] = 0x0f;
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sequence[i++] = 0x10;
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sequence[i++] = 0x20;
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sequence[i++] = 0x40;
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sequence[i++] = 0x80;
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sequence[i++] = 0x40;
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sequence[i++] = 0x20;
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sequence[i++] = 0x10;
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sequence[i++] = 0xf0;
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sequence[i++] = 0x08;
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sequence[i++] = 0x04;
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sequence[i++] = 0x02;
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sequence[i++] = 0x01;
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sequence[i++] = 0x0f;
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sequence[i++] = 0xff;
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osmo_i460_demux_in(ts, sequence, sizeof(sequence));
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@ -7,15 +7,15 @@ demux_bits_cb '64k': 00000000000000010000001000000011000001000000010100000110000
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mux_out: 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55
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==> test_32k_subchan
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demux_bits_cb '32k_0': 1111000011110000000000000000000000000000
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demux_bits_cb '32k_4': 0000111111110000000000000000000000000000
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demux_bits_cb '32k_0': 0000111111110000000000000000000000000000
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demux_bits_cb '32k_4': 1111000011110000000000000000000000000000
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test_32k_subchan-single-0
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mux_out: f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5
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mux_out: f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5
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mux_out: 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f
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mux_out: 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f
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mux_out: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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test_32k_subchan-single-1
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mux_out: 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f
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mux_out: 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f 5f
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mux_out: f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5
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mux_out: f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5
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mux_out: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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==> test_16k_subchan
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@ -24,28 +24,28 @@ demux_bits_cb '16k_2': 0011000011000000000000000000000000000000
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demux_bits_cb '16k_4': 0000110011000000000000000000000000000000
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demux_bits_cb '16k_6': 0000001111000000000000000000000000000000
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test_16k_subchan-single-0
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mux_out: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
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mux_out: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
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mux_out: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
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mux_out: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
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mux_out: 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f
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mux_out: 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f
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mux_out: 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f
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mux_out: 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f
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mux_out: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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test_16k_subchan-single-1
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mux_out: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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mux_out: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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mux_out: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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mux_out: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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mux_out: df df df df df df df df df df df df df df df df
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mux_out: df df df df df df df df df df df df df df df df
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mux_out: df df df df df df df df df df df df df df df df
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mux_out: df df df df df df df df df df df df df df df df
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mux_out: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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test_16k_subchan-single-2
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mux_out: df df df df df df df df df df df df df df df df
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mux_out: df df df df df df df df df df df df df df df df
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mux_out: df df df df df df df df df df df df df df df df
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mux_out: df df df df df df df df df df df df df df df df
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mux_out: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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mux_out: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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mux_out: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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mux_out: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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mux_out: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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test_16k_subchan-single-3
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mux_out: 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f
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mux_out: 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f
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mux_out: 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f
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mux_out: 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f
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mux_out: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
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mux_out: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
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mux_out: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
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mux_out: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
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mux_out: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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==> test_8k_subchan
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@ -58,58 +58,58 @@ demux_bits_cb '8k_5': 0000001001100000000000000000000000000000
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demux_bits_cb '8k_6': 0000000101100000000000000000000000000000
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demux_bits_cb '8k_7': 0000000011100000000000000000000000000000
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test_8k_subchan-single-0
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mux_out: fe ff fe ff fe ff fe ff fe ff fe ff fe ff fe ff
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mux_out: fe ff fe ff fe ff fe ff fe ff fe ff fe ff fe ff
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mux_out: fe ff fe ff fe ff fe ff fe ff fe ff fe ff fe ff
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mux_out: fe ff fe ff fe ff fe ff fe ff fe ff fe ff fe ff
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mux_out: 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff
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mux_out: 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff
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mux_out: 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff
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mux_out: 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff
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mux_out: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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test_8k_subchan-single-1
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mux_out: fd ff fd ff fd ff fd ff fd ff fd ff fd ff fd ff
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mux_out: fd ff fd ff fd ff fd ff fd ff fd ff fd ff fd ff
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mux_out: fd ff fd ff fd ff fd ff fd ff fd ff fd ff fd ff
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mux_out: fd ff fd ff fd ff fd ff fd ff fd ff fd ff fd ff
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mux_out: bf ff bf ff bf ff bf ff bf ff bf ff bf ff bf ff
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mux_out: bf ff bf ff bf ff bf ff bf ff bf ff bf ff bf ff
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mux_out: bf ff bf ff bf ff bf ff bf ff bf ff bf ff bf ff
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mux_out: bf ff bf ff bf ff bf ff bf ff bf ff bf ff bf ff
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mux_out: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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test_8k_subchan-single-2
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mux_out: fb ff fb ff fb ff fb ff fb ff fb ff fb ff fb ff
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mux_out: fb ff fb ff fb ff fb ff fb ff fb ff fb ff fb ff
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mux_out: fb ff fb ff fb ff fb ff fb ff fb ff fb ff fb ff
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mux_out: fb ff fb ff fb ff fb ff fb ff fb ff fb ff fb ff
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mux_out: df ff df ff df ff df ff df ff df ff df ff df ff
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mux_out: df ff df ff df ff df ff df ff df ff df ff df ff
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mux_out: df ff df ff df ff df ff df ff df ff df ff df ff
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mux_out: df ff df ff df ff df ff df ff df ff df ff df ff
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mux_out: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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test_8k_subchan-single-3
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mux_out: f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff
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mux_out: f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff
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mux_out: f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff
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mux_out: f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff
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mux_out: ef ff ef ff ef ff ef ff ef ff ef ff ef ff ef ff
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mux_out: ef ff ef ff ef ff ef ff ef ff ef ff ef ff ef ff
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mux_out: ef ff ef ff ef ff ef ff ef ff ef ff ef ff ef ff
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mux_out: ef ff ef ff ef ff ef ff ef ff ef ff ef ff ef ff
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mux_out: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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test_8k_subchan-single-4
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mux_out: ef ff ef ff ef ff ef ff ef ff ef ff ef ff ef ff
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mux_out: ef ff ef ff ef ff ef ff ef ff ef ff ef ff ef ff
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mux_out: ef ff ef ff ef ff ef ff ef ff ef ff ef ff ef ff
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mux_out: ef ff ef ff ef ff ef ff ef ff ef ff ef ff ef ff
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mux_out: f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff
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mux_out: f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff
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mux_out: f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff
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mux_out: f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff f7 ff
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mux_out: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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test_8k_subchan-single-5
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mux_out: df ff df ff df ff df ff df ff df ff df ff df ff
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mux_out: df ff df ff df ff df ff df ff df ff df ff df ff
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mux_out: df ff df ff df ff df ff df ff df ff df ff df ff
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mux_out: df ff df ff df ff df ff df ff df ff df ff df ff
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mux_out: fb ff fb ff fb ff fb ff fb ff fb ff fb ff fb ff
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mux_out: fb ff fb ff fb ff fb ff fb ff fb ff fb ff fb ff
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mux_out: fb ff fb ff fb ff fb ff fb ff fb ff fb ff fb ff
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mux_out: fb ff fb ff fb ff fb ff fb ff fb ff fb ff fb ff
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mux_out: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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test_8k_subchan-single-6
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mux_out: bf ff bf ff bf ff bf ff bf ff bf ff bf ff bf ff
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mux_out: bf ff bf ff bf ff bf ff bf ff bf ff bf ff bf ff
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mux_out: bf ff bf ff bf ff bf ff bf ff bf ff bf ff bf ff
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mux_out: bf ff bf ff bf ff bf ff bf ff bf ff bf ff bf ff
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mux_out: fd ff fd ff fd ff fd ff fd ff fd ff fd ff fd ff
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mux_out: fd ff fd ff fd ff fd ff fd ff fd ff fd ff fd ff
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mux_out: fd ff fd ff fd ff fd ff fd ff fd ff fd ff fd ff
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mux_out: fd ff fd ff fd ff fd ff fd ff fd ff fd ff fd ff
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mux_out: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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test_8k_subchan-single-7
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mux_out: 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff
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mux_out: 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff
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mux_out: 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff
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mux_out: 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff 7f ff
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mux_out: fe ff fe ff fe ff fe ff fe ff fe ff fe ff fe ff
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mux_out: fe ff fe ff fe ff fe ff fe ff fe ff fe ff fe ff
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mux_out: fe ff fe ff fe ff fe ff fe ff fe ff fe ff fe ff
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mux_out: fe ff fe ff fe ff fe ff fe ff fe ff fe ff fe ff
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mux_out: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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==> test_unused_subchan
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test_unused_subchan-single
|
||||
mux_out: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
|
||||
mux_out: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
|
||||
mux_out: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
|
||||
mux_out: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
|
||||
mux_out: 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f
|
||||
mux_out: 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f
|
||||
mux_out: 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f
|
||||
mux_out: 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f
|
||||
mux_out: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
|
||||
|
|
|
|||
Loading…
Reference in New Issue