ESP32C6 ULP processor

[oscalcmen]

I'm trying to use the ESP32C6 ULP lp-gpio and lp-i2c ports for driving a sensor. I started modifying the INTERRUPT_LP example but it did not work. The main for the HP core was not changed but the ULP main includes a GPIO toggle at every interrupt, as follows:

#include <stdio.h>
#include "ulp_lp_core_utils.h"
#include "ulp_lp_core_interrupts.h"
#include "ulp_lp_core_gpio.h"

volatile uint32_t lp_core_pmu_intr_count, out_state = 0;

void ulp_lp_core_lp_pmu_intr_handler(void)
{
out_state ^= 0x01
ulp_lp_core_sw_intr_clear();
lp_core_pmu_intr_count++;
printf("LP PMU interrupt received: %d\n", lp_core_pmu_intr_count);
ulp_lp_core_gpio_set_level(LP_IO_NUM_5, out_state);
}

int main(void)
{
lp_core_pmu_intr_count = 0;
ulp_lp_core_intr_enable();
ulp_lp_core_sw_intr_enable(true);

ulp_lp_core_gpio_init(LP_IO_NUM_5);
ulp_lp_core_gpio_input_enable(LP_IO_NUM_5);
ulp_lp_core_gpio_output_enable(LP_IO_NUM_5);

return 0;

}

it did not work, even if I create syntax errors in the main above, it compiles correctly, of course it did not work. Is there a guide for the ULP configuration/use?
Regards

[oscalcmen]

missing sysbuild!

[oscalcmen]

errors in include file
In file included from /home/oscalcmen/workspace/Zephyr/ESP32/ulp/lp_core/interrupt_ulp/remote/src/main.c:10:
/home/oscalcmen/zephyrproject/modules/hal/espressif/zephyr/esp32c6/../../components/ulp/lp_core/lp_core/include/ulp_lp_core_gpio.h: In function 'ulp_lp_core_gpio_init':
/home/oscalcmen/zephyrproject/modules/hal/espressif/zephyr/esp32c6/../../components/ulp/lp_core/lp_core/include/ulp_lp_core_gpio.h:60:5: warning: implicit declaration of function '_rtcio_ll_enable_io_clock'; did you mean 'rtcio_ll_enable_io_clock'? [-Wimplicit-function-declaration]
60 | _rtcio_ll_enable_io_clock(true);
| ^~~~~~~~~~~~~~~~~~~~~~~~~
| rtcio_ll_enable_io_clock
/home/oscalcmen/zephyrproject/modules/hal/espressif/zephyr/esp32c6/../../components/ulp/lp_core/lp_core/include/ulp_lp_core_gpio.h:62:41: error: 'RTCIO_LL_FUNC_RTC' undeclared (first use in this function); did you mean 'RTCIO_FUNC_RTC'?
62 | rtcio_ll_function_select(lp_io_num, RTCIO_LL_FUNC_RTC);
| ^~~~~~~~~~~~~~~~~
| RTCIO_FUNC_RTC
/home/oscalcmen/zephyrproject/modules/hal/espressif/zephyr/esp32c6/../../components/ulp/lp_core/lp_core/include/ulp_lp_core_gpio.h:62:41: note: each undeclared identifier is reported only once for each function it appears in
[16/130] Building C object zephyr/CMakeFiles/zephyr.dir/lib/heap/heap.c.obj
ninja: build stopped: subcommand failed.
[10/24] No configure step for 'mcuboot'
FAILED: _sysbuild/interrupt_ulp_lpcore-prefix/src/interrupt_ulp_lpcore-stamp/interrupt_ulp_lpcore-build /home/oscalcmen/workspace/Zephyr/ESP32/ulp/lp_core/interrupt_ulp/build/_sysbuild/interrupt_ulp_lpcore-prefix/src/interrupt_ulp_lpcore-stamp/interrupt_ulp_lpcore-build
cd /home/oscalcmen/workspace/Zephyr/ESP32/ulp/lp_core/interrupt_ulp/build/interrupt_ulp_lpcore && /usr/bin/cmake --build .
ninja: build stopped: subcommand failed.
FATAL ERROR: command exited with status 1: /usr/bin/cmake --build /home/oscalcmen/workspace/Zephyr/ESP32/ulp/lp_core/interrupt_ulp/build

[oscalcmen]

but these are defined in the included files, any clue why these fail if defined? a too long path?