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change(i2s): add warning for inaccurate sample rate

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This commit is contained in:
laokaiyao 2024-08-28 11:05:08 +08:00
parent fe80989a17
commit 462698f2de
3 changed files with 10 additions and 0 deletions
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3
components/esp_driver_i2s/i2s_std.c
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@ -39,6 +39,9 @@ static esp_err_t i2s_std_calculate_clock(i2s_chan_handle_t handle, const i2s_std
clk_info->bclk = rate * handle->total_slot * slot_bits;
clk_info->mclk = rate * clk_cfg->mclk_multiple;
clk_info->bclk_div = clk_info->mclk / clk_info->bclk;
if (clk_info->mclk % clk_info->bclk != 0) {
ESP_LOGW(TAG, "the current mclk multiple cannot perform integer division (slot_num: %"PRIu32", slot_bits: %"PRIu32")", handle->total_slot, slot_bits);
}
} else {
/* For slave mode, mclk >= bclk * 8, so fix bclk_div to 2 first */
clk_info->bclk_div = 8;

3
components/esp_driver_i2s/i2s_tdm.c
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@ -46,6 +46,9 @@ static esp_err_t i2s_tdm_calculate_clock(i2s_chan_handle_t handle, const i2s_tdm
clk_info->mclk = clk_info->bclk * clk_info->bclk_div;
ESP_LOGW(TAG, "the current mclk multiple is too small, adjust the mclk multiple to %"PRIu32, clk_info->mclk / rate);
}
if (clk_info->mclk % clk_info->bclk != 0) {
ESP_LOGW(TAG, "the current mclk multiple cannot perform integer division (slot_num: %"PRIu32", slot_bits: %"PRIu32")", handle->total_slot, slot_bits);
}
} else {
if (clk_cfg->bclk_div < 8) {
ESP_LOGW(TAG, "the current bclk division is too small, adjust the bclk division to 8");

4
tools/idf_py_actions/hints.yml
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@ -435,3 +435,7 @@
-
re: "unplaced orphan section"
hint: "Avoid creating custom sections. Please refer to the 'Linker Script Generation' article in the IDF documentation to address this. Or set option CONFIG_COMPILER_ORPHAN_SECTIONS_PLACE (not recommended)."
-
re: "the current mclk multiple cannot perform integer division"
hint: "Please adjust the mclk multiple to get the accurate sample rate.\nFor example, if you're using 24-bit slot width or enabled 3 slots, then the mclk multiple should be a multiple of 3, otherwise the sample rate will be inaccurate."