diff options
| author | robert-hh <robert@hammelrath.com> | 2023-04-04 16:12:45 +0200 |
|---|---|---|
| committer | Damien George <damien@micropython.org> | 2023-05-23 09:53:24 +1000 |
| commit | 20fd22edad051384b9cd929d925a91d607fbed8d (patch) | |
| tree | 561059c26e499fdc8096571292d1ffa874b4dcf4 /docs | |
| parent | 2a38531d73a9795c479635162c0609f6328e088c (diff) | |
samd/machine_uart: Add support for UART hardware flow control.
By specifying rts=pin(x) and/or cts=Pin(x) in the constructor. The pad
numbers for the UART pins are fix in this case: TX must be at pad 0, RX at
pad 1, RTS at pad 2 and CTS at pad 3.
repr(uart) shows the pin names for rts and cts, if set. In case of a RX
overflow, the rx interrupt will be disabled instead of just discarding the
data. That allows RTS to act.
If RTS is inactive, still 2 bytes can be buffered in the FIFO.
Signed-off-by: robert-hh <robert@hammelrath.com>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/samd/pinout.rst | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/docs/samd/pinout.rst b/docs/samd/pinout.rst index 702da2c17..64db455ea 100644 --- a/docs/samd/pinout.rst +++ b/docs/samd/pinout.rst @@ -83,7 +83,9 @@ Examples for Adafruit ItsyBitsy M0 Express: - uart 4 at pins D2/D5 - uart 5 at pins SCL/SDA -or other combinations. +or other combinations. For hardware flow control, tx must be at pad 0, rx at pad 1, +rts at pad 2 and cts at pad 3. This applies for instance to +UART 3 or UART 1 at the pins D13/D11/D10/D12 for rx/tx/rts/cts. SAMD21 I2C assignments `````````````````````` @@ -214,7 +216,9 @@ Examples for Adafruit ItsyBitsy 4 Express: - uart 4 at pins SDA/SCL - uart 5 at pins D12/D13 -or other combinations. +or other combinations. For hardware flow control, tx must be at pad 0, rx at pad 1, +rts at pad 2 and cts at pad 3. This applies for instance to +UART 5 at the pins D12/D13/D10/D11 for rx/tx/rts/cts. SAMD51 I2C assignments `````````````````````` |