michallenc opened a new pull request, #16783:
URL: https://github.com/apache/nuttx/pull/16783
## Summary
Adds support for PIC32CZ CA70 MCU series and its evaluation kit. This series
is pin to pin and binary compatible with SAMv7 series, it's basically just a
rebrand with (likely) new manufacturing technology. The only difference should
be larger RAM memory (512 kB instead of 384 kB). Therefore the support is
placed in SAMv7 directory and just new configuration options are added. Also
every PIC revision is basically a SAMv7 B revision, thus MCAN and EMAC code has
to take this into account.
Microchip also has PIC32CZ CA80/90 series, but these MCUs are completely
different from SAMv7 series and thus PIC32CZ CA70 series. I think we should
keep CA70 support in SAMv7 directory and create a new directory for pic32czca
once we support it.
Basic support for PIC32CZ CA70 Curiosity evaluation kit is added. Two
configurations are available, standard `nsh` with plain NuttShell and `max`
configuration. The intention is to have all supported peripherals in the
latter, currently tested and supported are button, USB Device over CDC/ACM and
micro SD card.
## Impact
Adds new MCU series, should not have any impact on current SAMv7 code.
Documentation is added.
## Testing
Tested on PIC32CZ CA70 Curiosity evaluation kit.
```
NuttShell (NSH) NuttX-12.10.0
nsh>
nsh>
nsh> free
total used free maxused maxfree nused nfree name
513684 7996 505688 8352 505688 24 1 Umem
nsh>
```
**Buttons**
```
nsh> buttons &
buttons [4:100]
nsh> buttons_main: Starting the button_daemon
buttons_main: button_daemon started
button_daemon: Running
button_daemon: Opening /dev/buttons
button_daemon: Supported BUTTONs 0x03
Sample = 1
Sample = 0
Sample = 2
Sample = 0
Sample = 1
Sample = 3
Sample = 1
Sample = 0
```
**CDC/ACM**
```
nsh> sercon
sercon: Registering CDC/ACM serial driver
sercon: Successfully registered the CDC/ACM serial driver
nsh> echo "Hello NuttX" > /dev/ttyACM0
nsh>
```
Computer received the text and sent it back.
```
nsh> cat /dev/ttyACM0
Hello NuttX
```
**SD card**
```
nsh> ls /mnt
/mnt:
sdcard0/
nsh>
nsh> echo "Hello NuttX" > /mnt/sdcard0/test.txt
nsh> cat /mnt/sdcard0/test.txt
Hello NuttX
```
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