lp_timer: add hal-layer codes for esp32c6

components/hal/esp32c6/include/hal/lp_timer_hal.h

@@ -0,0 +1,47 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#pragma once
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include "soc/soc.h"
+#include "hal/lp_timer_types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * @brief set alarm target value
+ *
+ * @param timer_id timer num of lp_timer, 0 or 1 for esp32c6
+ *
+ * @param value when counter reaches alarm value, alarm event will be triggered
+ */
+void lp_timer_hal_set_alarm_target(uint8_t timer_id, uint64_t value);
+
+/**
+ * @brief get current counter value
+ *
+ * @param timer_id timer num of lp_timer, 0 or 1 for esp32c6
+ */
+uint64_t lp_timer_hal_get_cycle_count(uint8_t timer_id);
+
+/**
+ * @brief clear alarm interrupt status
+ */
+void lp_timer_hal_clear_alarm_intr_status(void);
+
+/**
+ * @brief clear overflow interrupt status
+ */
+void lp_timer_hal_clear_overflow_intr_status(void);
+
+#ifdef __cplusplus
+}
+#endif

components/hal/esp32c6/include/hal/lp_timer_ll.h

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+/*
+ * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+// The LL layer for ESP32-C6 LP_Timer register operations
+
+#pragma once
+
+#include <stdlib.h>
+#include "soc/soc.h"
+#include "soc/rtc.h"
+#include "soc/lp_timer_struct.h"
+#include "soc/lp_aon_reg.h"
+#include "hal/lp_timer_types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+FORCE_INLINE_ATTR void lp_timer_ll_set_alarm_target(lp_timer_dev_t *dev, uint8_t timer_id, uint64_t value)
+{
+    dev->target[timer_id].hi.target_hi = (value >> 32) & 0xFFFF;
+    dev->target[timer_id].lo.target_lo = value & 0xFFFFFFFF;
+}
+
+FORCE_INLINE_ATTR void lp_timer_ll_set_target_enable(lp_timer_dev_t *dev, uint8_t timer_id, bool en)
+{
+    dev->target[timer_id].hi.enable = en;
+}
+
+FORCE_INLINE_ATTR uint32_t lp_timer_ll_get_counter_value_low(lp_timer_dev_t *dev, uint8_t timer_id)
+{
+    return dev->counter[timer_id].lo.counter_lo;
+}
+
+FORCE_INLINE_ATTR uint32_t lp_timer_ll_get_counter_value_high(lp_timer_dev_t *dev, uint8_t timer_id)
+{
+    return dev->counter[timer_id].hi.counter_hi;
+}
+
+FORCE_INLINE_ATTR void lp_timer_ll_counter_snapshot(lp_timer_dev_t *dev)
+{
+    dev->update.update = 1;
+}
+
+FORCE_INLINE_ATTR void lp_timer_ll_clear_alarm_intr_status(lp_timer_dev_t *dev)
+{
+    dev->int_clr.alarm = 1;
+}
+
+FORCE_INLINE_ATTR void lp_timer_ll_clear_overflow_intr_status(lp_timer_dev_t *dev)
+{
+    dev->int_clr.overflow = 1;
+}
+
+FORCE_INLINE_ATTR uint64_t lp_timer_ll_time_to_count(uint64_t time_in_us)
+{
+    uint32_t slow_clk_value = REG_READ(LP_AON_STORE1_REG);
+    return ((time_in_us * (1 << RTC_CLK_CAL_FRACT)) / slow_clk_value);
+}
+
+#ifdef __cplusplus
+}
+#endif

components/hal/esp32c6/lp_timer_hal.c

@@ -0,0 +1,46 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <esp_types.h>
+#include "sdkconfig.h"
+#include "esp_attr.h"
+#include "soc/soc.h"
+#include "hal/lp_timer_ll.h"
+
+static DRAM_ATTR struct {
+    lp_timer_dev_t *dev;
+} lp_timer_context = { .dev = &LP_TIMER };
+
+void IRAM_ATTR lp_timer_hal_set_alarm_target(uint8_t timer_id, uint64_t value)
+{
+    lp_timer_ll_clear_alarm_intr_status(lp_timer_context.dev);
+    lp_timer_ll_set_alarm_target(lp_timer_context.dev, timer_id, value);
+    lp_timer_ll_set_target_enable(lp_timer_context.dev, timer_id, true);
+}
+
+uint64_t IRAM_ATTR lp_timer_hal_get_cycle_count(uint8_t timer_id)
+{
+    lp_timer_ll_counter_snapshot(lp_timer_context.dev);
+    uint32_t lo = lp_timer_ll_get_counter_value_low(lp_timer_context.dev, timer_id);
+    uint32_t hi = lp_timer_ll_get_counter_value_high(lp_timer_context.dev, timer_id);
+    lp_timer_counter_value_t result = {
+        .lo = lo,
+        .hi = hi
+    };
+    return result.val;
+}
+
+void IRAM_ATTR lp_timer_hal_clear_alarm_intr_status(void)
+{
+    lp_timer_ll_clear_alarm_intr_status(lp_timer_context.dev);
+}
+
+void IRAM_ATTR lp_timer_hal_clear_overflow_intr_status(void)
+{
+    lp_timer_ll_clear_overflow_intr_status(lp_timer_context.dev);
+}