ulp: add support for using lp timer with lp core on C6

components/ulp/lp_core/shared/include/ulp_lp_core_lp_timer_shared.h

@@ -0,0 +1,36 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#pragma once
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Sets the next wakeup alarm
+ *
+ * @note This only sets the alarm for a single wakeup. For periodic wakeups you will
+ *       have to call this function again after each wakeup to configure the next time.
+ *
+ * @note If ulp_lp_core_cfg_t.lp_timer_sleep_duration_us is set the ulp will automatically set
+ *       the next wakeup time after returning from main and override this value.
+ *
+ * @param sleep_duration_us Time to next wakeup in microseconds
+ */
+void ulp_lp_core_lp_timer_set_wakeup_time(uint64_t sleep_duration_us);
+
+
+/**
+ * @brief Disables the lp timer alarm and clears any pending alarm interrupts
+ *
+ */
+void ulp_lp_core_lp_timer_disable(void);
+
+#ifdef __cplusplus
+}
+#endif

components/ulp/lp_core/shared/include/ulp_lp_core_memory_shared.h

@@ -0,0 +1,28 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#pragma once
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct {
+    uint64_t sleep_duration_us;  /* Configured sleep duration for periodic wakeup, if set the ulp will automatically schedule the next wakeup */
+} ulp_lp_core_memory_shared_cfg_t;
+
+/**
+ * @brief Returns a pointer to a struct shared between the main cpu and lp core,
+ *        intended for sharing variables between the ulp component and ulp binary
+ *
+ * @return ulp_lp_core_memory_shared_cfg_t* Pointer to the shared config struct
+ */
+ulp_lp_core_memory_shared_cfg_t* ulp_lp_core_memory_shared_cfg_get(void);
+
+#ifdef __cplusplus
+}
+#endif