eren-terzioglu opened a new pull request, #18656:
URL: https://github.com/apache/nuttx/pull/18656
## Summary
<!-- This field should contain a summary of the changes. It will be
pre-filled with the commit's message and descriptions. Adjust it accordingly -->
* Docs/risc-v/esp32p4: Add LPI2C docs
Add LPI2C docs for esp32p4
* boards/risc-v/esp32p4: Add LPI2C board support
Add LPI2C board support for esp32p4
* arch/risc-v/espressif: Add LPI2C support for esp32p4
Add LPI2C support for esp32p4
* Docs/risc-v/esp32p4: Add LPUART docs for esp32p4
Add LPUART docs for esp32p4
* arch/risc-v/espressif: Add LPUART support for esp32p4
Add LPUART support for esp32p4
## Impact
<!-- Please fill the following sections with YES/NO and provide a brief
explanation -->
Impact on user: Yes, users can use LPI2C and LPUART for esp32p4
<!-- Does it impact user's applications? How? -->
Impact on build: No
<!-- Does it impact on building NuttX? How? (please describe the required
changes on the build system) -->
Impact on hardware: LPUART and LPI2C supported by esp32p4
<!-- Does it impact a specific hardware supported by NuttX? -->
Impact on documentation: Yes, related docs added
<!-- Does it impact the existing documentation? Please provide additional
documentation to reflect that -->
Impact on security: No
<!-- Does it impact NuttX's security? -->
Impact on compatibility: No
<!-- Does it impact compatibility between previous and current versions? Is
this a breaking change? -->
## Testing
<!-- Please provide all the testing procedure. Consider that upstream
reviewers should be able to reproduce the same testing performed internally -->
### For LPUART
`esp32p4-function-ev-board:nsh` used with `CONFIG_ESPRESSIF_LP_UART0=y`
option used
### For LPI2C
`esp32p4-function-ev-board:i2c` defconfig used with these options:
```
CONFIG_I2CTOOL_MAXBUS=3
CONFIG_ESPRESSIF_LP_I2C0=y
```
### Building
<!-- Provide how to build the test for each SoC being tested -->
### For LPUART
Command to build:
```
make distclean && ./tools/configure.sh esp32p4-function-ev-board:nsh &&
kconfig-tweak -e CONFIG_ESPRESSIF_LP_UART0 && make olddefconfig && make -j &&
make download ESPTOOL_PORT=/dev/ttyUSB0 ESPTOOL_BAUD=921600 ESPTOOL_BINDIR=./
```
### For LPI2C
Command to build:
```
make distclean && ./tools/configure.sh esp32p4-function-ev-board:i2c &&
kconfig-tweak -e CONFIG_ESPRESSIF_LP_I2C0 && kconfig-tweak set-value
CONFIG_I2CTOOL_MAXBUS 3 && make olddefconfig && make -j && make download
ESPTOOL_PORT=/dev/ttyUSB0 ESPTOOL_BAUD=921600 ESPTOOL_BINDIR=./
```
### Running
<!-- Provide how to run the test for each SoC being tested -->
### For LPUART
`echo 1 > /dev/ttyS1` command used to test with using a logic analyzer. Here
are the pins
|Pin Name|Pin Number|
|:-----:|:---------:|
| TX | 14 |
|RX | 15 |
### For LPI2C
Firstly `ls /dev` command used to test is it initialized. `i2c2` should
appear on output. After that these pins connected to logic analyzer:
| Pin Name | Pin value |
|:--:|:--:|
| SCL | 4 |
| SDA | 5 |
After the connection `i2c dev -b 2 0x70 0x77` command used and output
checked with logic analyzer
### Results
<!-- Provide tests' results and runtime logs -->
### For LPUART
```
nsh> echo 1 > /dev/ttyS1
nsh>
```
### For LPI2C
Output should look like this:
```
nsh>
nsh> ls /dev
/dev:
console
i2c0
i2c2
null
random
ttyS0
zero
nsh>
nsh> i2c dev -b 2 0x70 0x77
NOTE: Some devices may not appear with this scan.
You may also try a scan with the -z flag to discover more devices using a
zero-byte write request.
0 1 2 3 4 5 6 7 8 9 a b c d e f
00:
10:
20:
30: Elapsed time: 0
1. STATUS: 00000000 COUNT: 1 EVENT: SENDADDR ( 1) PARM: 00000070 TIME: 0
2. STATUS: 36000010 COUNT: 1 EVENT: ERROR ( 6) PARM: 00000400 TIME: 0
Elapsed time: 0
1. STATUS: 66000000 COUNT: 1 EVENT: SENDADDR ( 1) PARM: 00000071 TIME: 0
2. STATUS: 36000010 COUNT: 1 EVENT: ERROR ( 6) PARM: 00000400 TIME: 0
Elapsed time: 0
1. STATUS: 66000000 COUNT: 1 EVENT: SENDADDR ( 1) PARM: 00000072 TIME: 0
2. STATUS: 36000010 COUNT: 1 EVENT: ERROR ( 6) PARM: 00000400 TIME: 0
Elapsed time: 0
1. STATUS: 66000000 COUNT: 1 EVENT: SENDADDR ( 1) PARM: 00000073 TIME: 0
2. STATUS: 36000010 COUNT: 1 EVENT: ERROR ( 6) PARM: 00000400 TIME: 0
Elapsed time: 0
1. STATUS: 66000000 COUNT: 1 EVENT: SENDADDR ( 1) PARM: 00000074 TIME: 0
2. STATUS: 36000010 COUNT: 1 EVENT: ERROR ( 6) PARM: 00000400 TIME: 0
Elapsed time: 0
1. STATUS: 66000000 COUNT: 1 EVENT: SENDADDR ( 1) PARM: 00000075 TIME: 0
2. STATUS: 36000010 COUNT: 1 EVENT: ERROR ( 6) PARM: 00000400 TIME: 0
Elapsed time: 0
1. STATUS: 66000000 COUNT: 1 EVENT: SENDADDR ( 1) PARM: 00000076 TIME: 0
2. STATUS: 36000010 COUNT: 1 EVENT: ERROR ( 6) PARM: 00000400 TIME: 0
Elapsed time: 0
1. STATUS: 66000000 COUNT: 1 EVENT: SENDADDR ( 1) PARM: 00000077 TIME: 0
2. STATUS: 36000010 COUNT: 1 EVENT: ERROR ( 6) PARM: 00000400 TIME: 0
40:
50:
60:
70: -- -- -- -- -- -- -- --
nsh>
```
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