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refactor(i2s): combine separate callback registers into single one

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This commit is contained in:
Chen Chen
2026-07-13 14:43:55 +08:00
parent c27bd91874
commit b8218f4fe1
11 changed files with 263 additions and 197 deletions
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docs/en/api-reference/peripherals/i2s.rst
+25 -22
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@@ -315,7 +315,9 @@ To satisfy the high quality audio requirement, following advanced APIs are provi
.. only:: SOC_I2S_SUPPORTS_TX_SYNC_CNT
- :cpp:func:`i2s_channel_get_sync_count`: Read the TX BCLK/FIFO synchronization counters. This API can also actively clear them through the ``reset`` argument.
- :cpp:func:`i2s_channel_get_sync_count`: Read the TX synchronization counters through
:cpp:type:`i2s_sync_count_t`. When TX FIFO synchronization is supported, ``diff_count`` is also returned.
This API can also actively clear the counters through the ``reset`` argument.
.. only:: SOC_I2S_SUPPORTS_TX_FIFO_SYNC
@@ -326,12 +328,15 @@ To satisfy the high quality audio requirement, following advanced APIs are provi
TX FIFO synchronization related APIs include:
- :cpp:func:`i2s_channel_get_sync_diff_count`: Read the TX FIFO synchronization difference counter. The value is signed and means ``I2S_TX_FIFO_CNT - I2S_TX_FIFO_IDEAL_CNT``.
- :cpp:func:`i2s_channel_get_sync_count`: Read the TX synchronization counters through :cpp:type:`i2s_sync_count_t`.
When TX FIFO synchronization is supported, ``diff_count`` is also returned as ``I2S_TX_FIFO_CNT - I2S_TX_FIFO_IDEAL_CNT``.
- :cpp:func:`i2s_channel_config_tx_fifo_sync`: Configure the expected count, automatic supplement threshold,
manual supplement threshold, and hardware supplement mode. After automatic hardware supplementation is
enabled, hardware automatically supplements or deletes data according to ``diff_count`` so that the actual
count approaches ``ideal_cnt``.
- :cpp:func:`i2s_channel_register_intr_event_callback`: Register the manual supplement threshold interrupt callback. When
manual supplement threshold, and hardware supplement mode.
- :cpp:func:`i2s_channel_enable_tx_fifo_sync`: Enable or disable TX FIFO synchronization. When enabled,
both automatic hardware data supplementation and manual interrupt are activated simultaneously.
When disabled, both are deactivated. This API must be called after
:cpp:func:`i2s_channel_config_tx_fifo_sync`.
- :cpp:func:`i2s_channel_register_event_callback`: Register the manual supplement threshold interrupt callback. When
``diff_count`` exceeds the manual supplement threshold, the driver calls this callback in the ISR and provides
``diff_count`` through :cpp:type:`i2s_sync_event_data_t`.
@@ -340,18 +345,15 @@ To satisfy the high quality audio requirement, following advanced APIs are provi
1. Create and initialize an I2S TX channel.
2. Call :cpp:func:`i2s_channel_config_tx_fifo_sync` to configure :cpp:type:`i2s_tx_fifo_sync_config_t`. ``ideal_cnt``
is the expected number of transmitted data units at each ETM synchronization check. ``auto_suppl_thresh`` is
the automatic hardware supplement threshold: set it to ``0`` to disable automatic hardware supplementation, or
set it to a value greater than ``0`` and smaller than ``manual_suppl_thresh`` to enable automatic hardware
supplementation. ``manual_suppl_thresh`` is the threshold for triggering the callback for manual handling. Once
enabled, if the difference exceeds the automatic supplement threshold but has not reached the manual supplement
threshold, hardware automatically supplements or deletes the corresponding amount of data to synchronize with
``ideal_cnt``.
3. To handle severe out-of-sync conditions, call :cpp:func:`i2s_channel_register_intr_event_callback` to register a callback.
After the callback is registered, the driver enables the TX synchronization interrupt. If the difference exceeds
the manual supplement threshold, the driver calls this callback in the ISR and provides ``diff_count`` through
:cpp:type:`i2s_sync_event_data_t`.
4. Call :cpp:func:`i2s_new_etm_task` to create the ``I2S_ETM_TASK_SYNC_FIFO`` task, and connect an external ETM event to this task.
5. Enable the ETM channel and I2S TX channel, so that ETM events periodically trigger synchronization checks.
the automatic hardware supplement threshold and must be smaller than ``manual_suppl_thresh``.
``manual_suppl_thresh`` is the threshold for triggering the callback for manual handling. If the difference
exceeds the automatic supplement threshold but has not reached the manual supplement threshold, hardware
automatically supplements or deletes the corresponding amount of data to synchronize with ``ideal_cnt``.
3. To handle severe out-of-sync conditions, call :cpp:func:`i2s_channel_register_event_callback` to register a callback.
4. Call :cpp:func:`i2s_channel_enable_tx_fifo_sync` with ``enable`` set to ``true`` to activate both automatic
hardware supplementation and manual interrupt simultaneously.
5. Call :cpp:func:`i2s_new_etm_task` to create the ``I2S_ETM_TASK_SYNC_FIFO`` task, and connect an external ETM event to this task.
6. Enable the ETM channel and I2S TX channel, so that ETM events periodically trigger synchronization checks.
The following example shows how to use a GPTimer alarm event to trigger the I2S TX FIFO synchronization check, and
get ``diff_count`` in the manual supplement threshold interrupt:
@@ -372,7 +374,7 @@ To satisfy the high quality audio requirement, following advanced APIs are provi
const i2s_sync_event_data_t *event,
void *user_ctx)
{
// event->diff_count = I2S_TX_FIFO_CNT - I2S_TX_FIFO_IDEAL_CNT
// Applications can use event->diff_count to adjust the data source, choose a compensation policy, or report it to upper layers.
return false;
}
@@ -382,11 +384,12 @@ To satisfy the high quality audio requirement, following advanced APIs are provi
.auto_suppl_thresh = 32,
.suppl_mode = I2S_TX_FIFO_SYNC_SUPPL_MODE_LAST_DATA,
};
i2s_intr_event_callbacks_t intr_cbs = {
.on_tx_sync = i2s_tx_sync_callback,
i2s_event_callbacks_t cbs = {
.on_tx_sync_evt = i2s_tx_sync_callback,
};
i2s_channel_config_tx_fifo_sync(tx_handle, &sync_cfg);
i2s_channel_register_intr_event_callback(tx_handle, &intr_cbs, NULL);
i2s_channel_register_event_callback(tx_handle, &cbs, NULL);
i2s_channel_enable_tx_fifo_sync(tx_handle, true);
i2s_etm_task_config_t i2s_task_cfg = {
.task_type = I2S_ETM_TASK_SYNC_FIFO,