refactor(sigmadelta): add hal sigmadelta driver

components/soc/esp32s2beta/include/hal/sigmadelta_ll.h

@@ -0,0 +1,73 @@
+// Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/*******************************************************************************
+ * NOTICE
+ * The hal is not public api, don't use in application code.
+ * See readme.md in soc/include/hal/readme.md
+ ******************************************************************************/
+
+// The LL layer for ESP32-S2 SIGMADELTA register operations
+
+#pragma once
+
+#include <stdbool.h>
+#include "soc/sigmadelta_periph.h"
+#include "hal/sigmadelta_types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Get SIGMADELTA hardware instance with giving sigmadelta num
+#define SIGMADELTA_LL_GET_HW(num) (((num) == 0) ? (&SIGMADELTA) : NULL)
+
+/**
+ * @brief Set Sigma-delta enable
+ *
+ * @param hw Peripheral SIGMADELTA hardware instance address.
+ * @param en Sigma-delta enable value
+ */
+static inline void sigmadelta_ll_set_en(gpio_sd_dev_t *hw, bool en)
+{
+    hw->misc.function_clk_en = en;
+}
+
+/**
+ * @brief Set Sigma-delta channel duty.
+ *
+ * @param hw Peripheral SIGMADELTA hardware instance address.
+ * @param channel Sigma-delta channel number
+ * @param duty Sigma-delta duty of one channel, the value ranges from -128 to 127, recommended range is -90 ~ 90.
+ *             The waveform is more like a random one in this range.
+ */
+static inline void sigmadelta_ll_set_duty(gpio_sd_dev_t *hw, sigmadelta_channel_t channel, int8_t duty)
+{
+    hw->channel[channel].duty = duty;
+}
+
+/**
+ * @brief Set Sigma-delta channel's clock pre-scale value.
+ *
+ * @param hw Peripheral SIGMADELTA hardware instance address.
+ * @param channel Sigma-delta channel number
+ * @param prescale The divider of source clock, ranges from 0 to 255
+ */
+static inline void sigmadelta_ll_set_prescale(gpio_sd_dev_t *hw, sigmadelta_channel_t channel, uint8_t prescale)
+{
+    hw->channel[channel].prescale = prescale;
+}
+
+#ifdef __cplusplus
+}
+#endif