add adc driver

Author: w200024212

src/fw/drivers/adc.h

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * 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.
+ */
+
+
+#pragma once
+
+#include "board/board.h"
+
+#include <stdbool.h>
+#include <stdint.h>
+
+//! Start using the I2C bus to which \a slave is connected
+//! Must be called before any other reads or writes to the slave are performed
+//! @param slave    I2C slave reference, which will identify the bus to use
+
+
+//! Init all adc supported
+//! Must be called before any other deviec use adc
+//! @param null
+extern int adc_init(void);
+
+//! Enable or disable adc and channel, eanble adc will config pinmux
+//! Must enable adc before get adc value
+//! @param adc_config   must init member: adc, adc_channel, gpio_pin;adc_channel:0~7; if don't need gpio_pin , gpio_pin should config as 0xFF;
+extern int adc_enabled(ADCInputConfig* adc_config, bool enabled);
+
+//! Get special adc channel value
+//! Must enable adc before get adc value
+//! @param adc_config   must init member: adc, adc_channel;adc_channel:0~7;
+extern int get_adc_value(ADCInputConfig* adc_config, uint32_t *value);
+extern void example_adc(ADCInputConfig* adc_config);