Merge pull request #4360 from haocg9310/stm32DAC

fix stm32 drv_dac.c some bugs

Author: BernardXiong

bsp/stm32/libraries/HAL_Drivers/drv_dac.c

@@ -37,52 +37,74 @@ struct stm32_dac
 
 static struct stm32_dac stm32_dac_obj[sizeof(dac_config) / sizeof(dac_config[0])];
 
+static rt_uint32_t stm32_dac_get_channel(rt_uint32_t channel)
+{
+    rt_uint32_t stm32_channel = 0;
+
+    switch (channel)
+    {
+    case  1:
+        stm32_channel = DAC_CHANNEL_1;
+        break;
+    case  2:
+        stm32_channel = DAC_CHANNEL_2;
+        break;
+    default:
+        RT_ASSERT(0);
+        break;
+    }
+
+    return stm32_channel;
+}
+
 static rt_err_t stm32_dac_enabled(struct rt_dac_device *device, rt_uint32_t channel)
 {
+    uint32_t dac_channel;
     DAC_HandleTypeDef *stm32_dac_handler;
     RT_ASSERT(device != RT_NULL);
     stm32_dac_handler = device->parent.user_data;
 
 #if defined(SOC_SERIES_STM32MP1) || defined(SOC_SERIES_STM32H7) || defined(SOC_SERIES_STM32L4) || defined(SOC_SERIES_STM32F4)
-        HAL_DAC_Start(stm32_dac_handler, channel);
+    if ((channel <= 2) && (channel > 0))
+    {
+        /* set stm32 dac channel */
+        dac_channel =  stm32_dac_get_channel(channel);
+    }
+    else
+    {
+      LOG_E("dac channel must be 1 or 2.");  
+      return -RT_ERROR;
+    }
+    HAL_DAC_Start(stm32_dac_handler, dac_channel);
 #endif
 
     return RT_EOK;
 }
 
 static rt_err_t stm32_dac_disabled(struct rt_dac_device *device, rt_uint32_t channel)
 {
+    uint32_t dac_channel;
     DAC_HandleTypeDef *stm32_dac_handler;
     RT_ASSERT(device != RT_NULL);
     stm32_dac_handler = device->parent.user_data;
 
 #if defined(SOC_SERIES_STM32MP1) || defined(SOC_SERIES_STM32H7) || defined(SOC_SERIES_STM32L4) || defined(SOC_SERIES_STM32F4)
-    HAL_DAC_Stop(stm32_dac_handler, channel);
+    if ((channel <= 2) && (channel > 0))
+    {
+        /* set stm32 dac channel */
+        dac_channel =  stm32_dac_get_channel(channel);
+    }
+    else
+    {
+      LOG_E("dac channel must be 1 or 2.");  
+      return -RT_ERROR;
+    }
+    HAL_DAC_Stop(stm32_dac_handler, dac_channel);
 #endif
 
     return RT_EOK;
 }
 
-static rt_uint32_t stm32_dac_get_channel(rt_uint32_t channel)
-{
-    rt_uint32_t stm32_channel = 0;
-
-    switch (channel)
-    {
-    case  1:
-        stm32_channel = DAC_CHANNEL_1;
-        break;
-    case  2:
-        stm32_channel = DAC_CHANNEL_2;
-        break;
-    default:
-        RT_ASSERT(0);
-        break;
-    }
-
-    return stm32_channel;
-}
-
 static rt_err_t stm32_set_dac_value(struct rt_dac_device *device, rt_uint32_t channel, rt_uint32_t *value)
 {
     uint32_t dac_channel;