34 lines
945 B
ReStructuredText
34 lines
945 B
ReStructuredText
UART
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====
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Overview
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--------
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`Instructions`_
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.. _Instructions: ../template.html
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Application Example
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-------------------
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Configure uart settings and install uart driver to read/write using UART0 and UART1 interfaces: :example:`peripherals/uart`.
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API Reference
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-------------
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.. include:: /_build/inc/uart.inc
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GPIO Lookup Macros
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^^^^^^^^^^^^^^^^^^
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Some useful macros can be used to specified the **direct** GPIO (UART module connected to pads through direct IO mux without the GPIO mux) number of a UART channel, or vice versa.
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The pin name can be omitted if specify the channel of a GPIO num.
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e.g.
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1. ``UART_NUM_2_TXD_DIRECT_GPIO_NUM`` is the GPIO number of UART channel 2 TXD pin (17);
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2. ``UART_GPIO19_DIRECT_CHANNEL`` is the UART channel number of GPIO 19 (channel 0);
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3. ``UART_CTS_GPIO19_DIRECT_CHANNEL`` is the UART channel number of GPIO 19, and GPIO 19 must be a CTS pin (channel 0).
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.. include:: /_build/inc/uart_channel.inc
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