c100e9a9e8
The I2S BCLK frequency is calculated as: bclk = sample_rate * total_slot * data_width Previously, total_slot was always taken from the static config (esp_i2s0_config / esp_i2s1_config), which is hardcoded to 2. This is correct for mono and stereo, but wrong for TDM modes with more than 2 channels (e.g. 4-channel recording with ES7210). With 4 channels but total_slot=2, the BCLK is only half of what it should be, causing the actual sample rate to be half of the requested rate (e.g. requesting 16 kHz actually samples at 8 kHz). Replace priv->config->total_slot with MAX(priv->channels, 2) in all three BCLK calculation sites (i2s_check_mclkfrequency and i2s_set_clock for both master and slave paths). The MIN of 2 preserves the I2S protocol requirement that at least 2 slots exist even for mono, while correctly scaling for multi-channel TDM configurations. Signed-off-by: wangjianyu3 <wangjianyu3@xiaomi.com> |
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| arch | ||
| audio | ||
| binfmt | ||
| boards | ||
| cmake | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| dummy | ||
| fs | ||
| graphics | ||
| include | ||
| libs | ||
| mm | ||
| net | ||
| openamp | ||
| pass1 | ||
| sched | ||
| syscall | ||
| tools | ||
| video | ||
| wireless | ||
| .asf.yaml | ||
| .codespell-ignore-lines | ||
| .codespellrc | ||
| .editorconfig | ||
| .gitignore | ||
| .gitmessage | ||
| .pre-commit-config.yaml | ||
| .yamllint | ||
| AUTHORS | ||
| CMakeLists.txt | ||
| CONTRIBUTING.md | ||
| INVIOLABLES.md | ||
| Kconfig | ||
| LICENSE | ||
| Makefile | ||
| NOTICE | ||
| README.md | ||
| ReleaseNotes | ||
Apache NuttX is a real-time operating system (RTOS) with an emphasis on standards compliance and small footprint. Scalable from 8-bit to 64-bit microcontroller environments, the primary governing standards in NuttX are POSIX and ANSI standards. Additional standard APIs from Unix and other common RTOSs (such as VxWorks) are adopted for functionality not available under these standards, or for functionality that is not appropriate for deeply-embedded environments (such as fork()).
For brevity, many parts of the documentation will refer to Apache NuttX as simply NuttX.
Getting Started
First time on NuttX? Read the Getting Started guide! If you don't have a board available, NuttX has its own simulator that you can run on terminal.
Documentation
You can find the current NuttX documentation on the Documentation Page.
Alternatively, you can build the documentation yourself by following the Documentation Build Instructions.
The old NuttX documentation is still available in the Apache wiki.
Supported Boards
NuttX supports a wide variety of platforms. See the full list on the Supported Platforms page.
Contributing
If you wish to contribute to the NuttX project, read the Contributing guidelines for information on Git usage, coding standard, workflow and the NuttX principles.
License
The code in this repository is under either the Apache 2 license, or a license compatible with the Apache 2 license. See the License Page for more information.