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Merge branch 'feature/i2s_apll' into 'master'

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driver/i2s: add support apll clock

See merge request !1115
This commit is contained in:
Jiang Jiang Jian
2017-10-12 19:06:50 +08:00
parent 244e947beb 9d39881981
commit 8e47c355fa
4 changed files with 183 additions and 15 deletions
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6
docs/api-reference/peripherals/i2s.rst
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@@ -10,6 +10,8 @@ The I2S peripheral supports DMA meaning it can stream sample data without requir
I2S output can also be routed directly to the Digital/Analog Converter output channels (GPIO 25 & GPIO 26) to produce analog output directly, rather than via an external I2S codec.
.. note:: For high accuracy clock applications, APLL clock source can be used with `.use_apll = 1` and ESP32 will automatic caculate APLL parameter.
Application Example
-------------------
@@ -34,7 +36,9 @@ Short example of I2S configuration:
.communication_format = I2S_COMM_FORMAT_I2S | I2S_COMM_FORMAT_I2S_MSB,
.intr_alloc_flags = ESP_INTR_FLAG_LEVEL1, // high interrupt priority
.dma_buf_count = 8,
.dma_buf_len = 64
.dma_buf_len = 64,
.use_apll = 0,
.apll_param = I2S_APLL_NONE
};
static const i2s_pin_config_t pin_config = {