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Tim Radvan f842a40df4 rp2/rp2_pio: Add fifo_join support for PIO. 
The PIO state machines on the RP2040 have 4 word deep TX and RX FIFOs.  If
you only need one direction, you can "merge" them into either a single 8
word deep TX or RX FIFO.

We simply add constants to the PIO object, and set the appropriate bits in
`shiftctrl`.

Resolves #6854.

Signed-off-by: Tim Radvan <tim@tjvr.org>
 		2021-04-17 00:45:38 +10:00
..
SDdatalogger all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
bluetooth examples/bluetooth: Add bonding/passkey demo. 2020-12-02 14:44:00 +11:00
embedding examples/embedding: Fix example so it compiles again. 2021-04-09 15:47:54 +10:00
hwapi all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
natmod extmod/ure: Use single function for match/search/sub. 2020-06-08 09:16:09 +02:00
network all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
rp2 rp2/rp2_pio: Add fifo_join support for PIO. 2021-04-17 00:45:38 +10:00
unix all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
usercmodule examples/usercmodules: Simplify user C module enabling. 2021-04-01 16:27:38 +11:00
accel_i2c.py all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
accellog.py all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
asmled.py all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
asmsum.py all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
conwaylife.py all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
ledangle.py all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
mandel.py all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
micropython.py all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
pins.py all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
pyb.py all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
switch.py all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00