tmedicci opened a new pull request, #17067:
URL: https://github.com/apache/nuttx/pull/17067
## Summary
* risc-v/espressif/twai: Update common source code functions
Updates the common source code for the twai peripheral used by Espressif's
RISC-Vs SoCs. This enables newer SoCs to be supported in the future while
maintaining backwards compatibility.
## Impact
Impact on user: No.
Impact on build: No.
Impact on hardware: Not yet: newer Espressif SoCs can be supported on NuttX
following this change.
Impact on documentation: No.
Impact on security: No.
Impact on compatibility: No. It's totally backwards compatible.
## Testing
Testing can be performed using any of the `twai` defconfig available for any
of Espressif's RISC-V-based devices (ESP32-C3, ESP32-C6, or ESP32-H2). The
behavior of the twai didn't change, and this PR's results are the same of the
results before it. This can be verified:
### Building
#### ESP32-C3
```
make -j distclean && ./tools/configure.sh esp32c3-generic:twai &&
kconfig-tweak -e DEBUG_ASSERTIONS && kconfig-tweak -e DEBUG_FEATURES &&
kconfig-tweak -e CAN_LOOPBACK && kconfig-tweak -e ESPRESSIF_TWAI_TEST_MODE &&
kconfig-tweak --set-val ESPRESSIF_TWAI0_TXPIN 8 && kconfig-tweak --set-val
ESPRESSIF_TWAI0_RXPIN 8 && make olddefconfig && make flash
ESPTOOL_PORT=/dev/ttyUSB0 && picocom -b 115200 /dev/ttyUSB0
```
#### ESP32-C6
##### TWAI0
```
make -j distclean && ./tools/configure.sh esp32c6-devkitc:twai &&
kconfig-tweak -e DEBUG_ASSERTIONS && kconfig-tweak -e DEBUG_FEATURES &&
kconfig-tweak -e CAN_LOOPBACK && kconfig-tweak -e ESPRESSIF_TWAI_TEST_MODE &&
kconfig-tweak --set-val ESPRESSIF_TWAI0_TXPIN 8 && kconfig-tweak --set-val
ESPRESSIF_TWAI0_RXPIN 8 && make olddefconfig && make flash
ESPTOOL_PORT=/dev/ttyUSB0 && picocom -b 115200 /dev/ttyUSB0
```
##### TWAI1
```
make -j distclean && ./tools/configure.sh esp32c6-devkitc:twai &&
kconfig-tweak -e DEBUG_ASSERTIONS && kconfig-tweak -e DEBUG_FEATURES &&
kconfig-tweak -e CAN_LOOPBACK && kconfig-tweak -e ESPRESSIF_TWAI_TEST_MODE &&
kconfig-tweak -d ESPRESSIF_TWAI0 && kconfig-tweak -e ESPRESSIF_TWAI1 &&
kconfig-tweak --set-val ESPRESSIF_TWAI1_TXPIN 8 && kconfig-tweak --set-val
ESPRESSIF_TWAI1_RXPIN 8 && kconfig-tweak --set-str EXAMPLES_CAN_DEVPATH
"/dev/can1" && make olddefconfig && make flash ESPTOOL_PORT=/dev/ttyUSB0 &&
picocom -b 115200 /dev/ttyUSB0
```
#### ESP32-H2
```
make -j distclean && ./tools/configure.sh esp32h2-devkit:twai &&
kconfig-tweak -e DEBUG_ASSERTIONS && kconfig-tweak -e DEBUG_FEATURES &&
kconfig-tweak -e CAN_LOOPBACK && kconfig-tweak -e ESPRESSIF_TWAI_TEST_MODE &&
kconfig-tweak --set-val ESPRESSIF_TWAI0_TXPIN 8 && kconfig-tweak --set-val
ESPRESSIF_TWAI0_RXPIN 8 && make olddefconfig && make flash
ESPTOOL_PORT=/dev/ttyUSB0 && picocom -b 115200 /dev/ttyUSB0
```
### Running
Run the `can` application and expect it to exit with success code:
```
nsh> can -n 5 -b 5
```
### Results
```
nsh> can -n 5 -b 5
nmsgs: 5
min ID: 1 max ID: 5
Bit timing:
Baud: 727272
TSEG1: 16
TSEG2: 5
SJW: 4
ID: 1 DLC: 1
ID: 1 DLC: 1
ID: 1 DLC: 1 -- OK
ID: 2 DLC: 2
ID: 2 DLC: 2
ID: 2 DLC: 2 -- OK
ID: 3 DLC: 3
ID: 3 DLC: 3
ID: 3 DLC: 3 -- OK
ID: 4 DLC: 4
ID: 4 DLC: 4
ID: 4 DLC: 4 -- OK
ID: 5 DLC: 5
ID: 5 DLC: 5
ID: 5 DLC: 5 -- OK
Terminating!
nsh> echo $?
0
```
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