eren-terzioglu opened a new pull request, #18926:
URL: https://github.com/apache/nuttx/pull/18926
## 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/platforms/risc-v: Add Analog Comparator docs for esp32[-h2|-p4]
Add Analog Comparator docs for esp32h2 and esp32p4
* boards/risc-v/espressif: Add Analog Comparator board support for
esp32[-h2|-p4]
Add Analog Comparator board support for esp32p4 and esp32h2
* arch/risc-v/espressif: Add Analog Comparator for esp32[-h2|-p4]
Add analog comparator support for esp32p4 and esp32h2
## Impact
<!-- Please fill the following sections with YES/NO and provide a brief
explanation -->
Impact on user: Yes, analog comparator support added
<!-- 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: Yes, analog comparator support added
<!-- 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 -->
Config used:
```
esp32p4-function-ev-board:analog_cmpr
esp32h2-devkit:analog_cmpr
```
With these options:
```
CONFIG_DEBUG_ANALOG
CONFIG_DEBUG_ANALOG_ERROR
CONFIG_DEBUG_ANALOG_INFO
CONFIG_DEBUG_ANALOG_WARN
CONFIG_DEBUG_FEATURES
```
### Building
<!-- Provide how to build the test for each SoC being tested -->
Command to build:
```
make -j distclean && ./tools/configure.sh
esp32p4-function-ev-board:analog_cmpr && kconfig-tweak -e CONFIG_DEBUG_ANALOG
&& kconfig-tweak -e CONFIG_DEBUG_ANALOG_ERROR && kconfig-tweak -e
CONFIG_DEBUG_ANALOG_INFO && kconfig-tweak -e CONFIG_DEBUG_ANALOG_WARN &&
kconfig-tweak -e CONFIG_DEBUG_FEATURES && make olddefconfig && make
ESPTOOL_BINDIR=./ -s -j
```
### Running
<!-- Provide how to run the test for each SoC being tested -->
SRC pin of comparator (GPIO52->P4 GPIO11->H2) connected to GND at first,
after that pin connected to 3v3
Snippet used to test is looking like this:
```
#include <nuttx/config.h>
#include <nuttx/analog/comp.h>
#include <inttypes.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <syslog.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <debug.h>
#include <driver/gpio.h>
int main(int argc, FAR char *argv[])
{
int fd;
int ret;
int res;
fd = open("/dev/anacmpr0", O_RDONLY);
while(1)
{
ret = read(fd, &res, sizeof(res));
if (ret != 0)
{
printf("Result: %ld\n", res);
}
}
ret = read(fd, &res, sizeof(res));
return OK;
}
```
### Results
<!-- Provide tests' results and runtime logs -->
Output:
```
Result: 0
esp_ana_cmpr_callback: Comparator unit0: Positive cross event triggered
Result: 1
esp_ana_cmpr_callback: Comparator unit0: Negative cross event triggered
Result: 0
```
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