[adc] 支持adc框架获取BSP的ADC分辨率 (#5853)

2 files changed, 17 insertions, 7 deletions

diff --git a/components/drivers/include/drivers/adc.h b/components/drivers/include/drivers/adc.h
index 2ff4102a3b..d251a33a53 100644
--- a/components/drivers/include/drivers/adc.h
+++ b/components/drivers/include/drivers/adc.h
@@ -18,6 +18,7 @@ struct rt_adc_ops
 {
     rt_err_t (*enabled)(struct rt_adc_device *device, rt_uint32_t channel, rt_bool_t enabled);
     rt_err_t (*convert)(struct rt_adc_device *device, rt_uint32_t channel, rt_uint32_t *value);
+    rt_uint8_t (*get_resolution)(struct rt_adc_device *device);
 };
 
 struct rt_adc_device
@@ -31,6 +32,7 @@ typedef enum
 {
     RT_ADC_CMD_ENABLE = RT_DEVICE_CTRL_BASE(ADC) + 1,
     RT_ADC_CMD_DISABLE = RT_DEVICE_CTRL_BASE(ADC) + 2,
+    RT_ADC_CMD_GET_RESOLUTION = RT_DEVICE_CTRL_BASE(ADC) + 3,
 } rt_adc_cmd_t;
 
 rt_err_t rt_hw_adc_register(rt_adc_device_t adc,const char *name, const struct rt_adc_ops *ops, const void *user_data);
diff --git a/components/drivers/misc/adc.c b/components/drivers/misc/adc.c
index d54a14193b..ae324a16ec 100644
--- a/components/drivers/misc/adc.c
+++ b/components/drivers/misc/adc.c
@@ -41,21 +41,27 @@ static rt_size_t _adc_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_
 
 static rt_err_t _adc_control(rt_device_t dev, int cmd, void *args)
 {
-    rt_err_t result = RT_EOK;
+    rt_err_t result = -RT_EINVAL;
     rt_adc_device_t adc = (struct rt_adc_device *)dev;
 
-    if (adc->ops->enabled == RT_NULL)
-    {
-        return -RT_ENOSYS;
-    }
-    if (cmd == RT_ADC_CMD_ENABLE)
+    if (cmd == RT_ADC_CMD_ENABLE && adc->ops->enabled)
     {
         result = adc->ops->enabled(adc, (rt_uint32_t)args, RT_TRUE);
     }
-    else if (cmd == RT_ADC_CMD_DISABLE)
+    else if (cmd == RT_ADC_CMD_DISABLE && adc->ops->enabled)
     {
         result = adc->ops->enabled(adc, (rt_uint32_t)args, RT_FALSE);
     }
+    else if (cmd == RT_ADC_CMD_GET_RESOLUTION && adc->ops->get_resolution)
+    {
+        rt_uint8_t resolution = adc->ops->get_resolution(adc);
+        if(resolution != 0)
+        {
+            *((rt_uint8_t*)args) = resolution;
+            LOG_D("ADC resolution:%d", resolution);
+            result = RT_EOK;
+        }
+    }
 
     return result;
 }
@@ -115,6 +121,7 @@ rt_err_t rt_adc_enable(rt_adc_device_t dev, rt_uint32_t channel)
     rt_err_t result = RT_EOK;
 
     RT_ASSERT(dev);
+
     if (dev->ops->enabled != RT_NULL)
     {
         result = dev->ops->enabled(dev, channel, RT_TRUE);
@@ -132,6 +139,7 @@ rt_err_t rt_adc_disable(rt_adc_device_t dev, rt_uint32_t channel)
     rt_err_t result = RT_EOK;
 
     RT_ASSERT(dev);
+
     if (dev->ops->enabled != RT_NULL)
     {
         result = dev->ops->enabled(dev, channel, RT_FALSE);