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Author SHA1 Message Date
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
Tim Radvan 3ea05e499d examples/rp2: Add pio_uart_rx.py example. 
This was adapted from the `pio/uart_rx` example from the `pico-examples`
repository:
https://github.com/raspberrypi/pico-examples/blob/master/pio/uart_rx/uart_rx.pio

It demonstrates the `jmp_pin` feature in action.

Signed-off-by: Tim Radvan <tim@tjvr.org>
 2021-02-02 11:33:51 +11:00
Damien George 469345e728 rp2: Add new port to Raspberry Pi RP2 microcontroller. 
This commit adds a new port "rp2" which targets the new Raspberry Pi RP2040
microcontroller.

The build system uses pure cmake (with a small Makefile wrapper for
convenience).  The USB driver is TinyUSB, and there is a machine module
with most of the standard classes implemented.  Some examples are provided
in the examples/rp2/ directory.

Work done in collaboration with Graham Sanderson.

Signed-off-by: Damien George <damien@micropython.org>
 2021-01-30 00:42:29 +11:00