tmedicci opened a new pull request, #17070:
URL: https://github.com/apache/nuttx/pull/17070
## Summary
* risc-v/espressif/uart: Update common source code functions
- Updates the common source code for the UART 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 `nsh` or `usbconsole` defconfigs
available for any of Espressif's RISC-V-based devices (ESP32-C3, ESP32-C6, or
ESP32-H2). The behavior of the UART-related peripherals didn't change, and this
PR's results are the same of the results before it. This can be verified:
### Building
#### ESP32-C3
##### `nsh`
```
make -j distclean && ./tools/configure.sh esp32c3-generic:nsh && make flash
ESPTOOL_PORT=/dev/ttyUSB0 && picocom -b 115200 /dev/ttyUSB0
```
##### `usbconsole`
```
make -j distclean && ./tools/configure.sh esp32c3-generic:usbconsole && make
flash ESPTOOL_PORT=/dev/ttyACM0 && picocom -b 115200 /dev/ttyACM0
```
#### ESP32-C6
##### `nsh`
```
make -j distclean && ./tools/configure.sh esp32c6-devkitc:nsh && make flash
ESPTOOL_PORT=/dev/ttyUSB0 && picocom -b 115200 /dev/ttyUSB0
```
##### `usbconsole`
```
make -j distclean && ./tools/configure.sh esp32c6-devkitc:usbconsole && make
flash ESPTOOL_PORT=/dev/ttyACM0 && picocom -b 115200 /dev/ttyACM0
```
#### ESP32-H2
##### `nsh`
```
make -j distclean && ./tools/configure.sh esp32h2-devkit:nsh && make flash
ESPTOOL_PORT=/dev/ttyUSB0 && picocom -b 115200 /dev/ttyUSB0
```
##### `usbconsole`
```
make -j distclean && ./tools/configure.sh esp32h2-devkit:usbconsole && make
flash ESPTOOL_PORT=/dev/ttyACM0 && picocom -b 115200 /dev/ttyACM0
```
### Running
Just check for the proper boot with `nsh`.
### Results
Device booting properly:
```
ESP-ROM:esp32c6-20220919
Build:Sep 19 2022
rst:0x1 (POWERON),boot:0xc (SPI_FAST_FLASH_BOOT)
SPIWP:0xee
mode:DIO, clock div:2
load:0x40800000,len:0x4620
load:0x40804620,len:0x840
SHA-256 comparison failed:
Calculated: cf880d2574dbbce0efb8c367c2ad01953ddeb6487982414181460af34b263e3a
Expected: 0000000060b10000000000000000000000000000000000000000000000000000
Attempting to boot anyway...
entry 0x408042f0
pmu_param(dbg): blk_version is less than 3, act dbias not burnt in efuse
*** Booting NuttX ***
dram: lma 0x00000020 vma 0x40800000 len 0x4620 (17952)
dram: lma 0x00004648 vma 0x40804620 len 0x840 (2112)
padd: lma 0x00004e98 vma 0x00000000 len 0xb160 (45408)
imap: lma 0x00010000 vma 0x42020000 len 0xaf80 (44928)
padd: lma 0x0001af88 vma 0x00000000 len 0x5070 (20592)
imap: lma 0x00020000 vma 0x42000000 len 0x1d820 (120864)
total segments stored 6
NuttShell (NSH) NuttX-10.4.0
nsh>
```
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