projects / sigrok-dumps.git / blame
| Commit | Line | Data |
|---|---|---|
| 89a0671b BD |
1 | ------------------------------------------------------------------------------- |
| 2 | TDM Audio | |
| 3 | ------------------------------------------------------------------------------- | |
| 4 | ||
| 5 | This is a set of captures of TDM audio. | |
| 6 | ||
| 7 | Details: | |
| 8 | https://hackaday.io/project/2984-teensy-audio-library/log/57537-tdm-support-for-many-channel-audio-io | |
| 9 | https://www.analog.com/media/en/technical-documentation/technical-articles/MS-2275.pdf | |
| 10 | ||
| 11 | ||
| 12 | Logic analyser setup | |
| 13 | -------------------- | |
| 14 | ||
| 15 | The logic analyser used was a Saleae Logic16 (at 50MHz): | |
| 16 | ||
| 17 | Probe TDM Audio | |
| 18 | --------------------- | |
| 19 | 3 Bitclk | |
| 20 | 2 Framesync | |
| 21 | 1 Data | |
| 22 | ||
| 23 | ||
| 24 | tdm-4ch-16bit-cap1.sr | |
| 25 | --------------------- | |
| 26 | ||
| 27 | 4 channels, 16 bits per sample. | |
| 28 | Data is set of 0x1100 0x3322 0x5544 0x7766 0x9988 0xbbaa 0xddcc 0xffee. | |
| 29 | ||
| 30 | ||
| 31 | tdm-8ch-16bit-cap1.sr | |
| 32 | --------------------- | |
| 33 | ||
| 34 | 8 channels, 16 bits per sample | |
| 35 | Data is byte 0x12 repeated. |