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docs/esp32: Mention the use of Timer(0) by UART.IRQ_RXIDLE.
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In both the machine.UART and esp32.quickref sections. Signed-off-by: robert-hh <robert@hammelrath.com>
This commit is contained in:
robert-hh
Damien George
@@ -284,7 +284,8 @@ with a timer ID of 0, 0 and 1, or from 0 to 3 (inclusive)::
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tim1 = Timer(1)
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tim1.init(period=2000, mode=Timer.PERIODIC, callback=lambda t:print(1))
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The period is in milliseconds.
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The period is in milliseconds. When using UART.IRQ_RXIDLE, timer 0 is needed for
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the IRQ_RXIDLE mechanism and must not be used otherwise.
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Virtual timers are not currently supported on this port.
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@@ -224,7 +224,8 @@ Methods
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.. note::
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- The ESP32 port does not support the option hard=True.
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- The ESP32 port does not support the option hard=True. It uses Timer(0)
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for UART.IRQ_RXIDLE, so this timer cannot be used for other means.
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- The rp2 port's UART.IRQ_TXIDLE is only triggered when the message
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is longer than 5 characters and the trigger happens when still 5 characters
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