修改配置选项，添加条件编译

bsp/stm32/stm32l476-st-nucleo/.config

@@ -344,9 +344,7 @@ CONFIG_BSP_USING_GPIO=y
 CONFIG_BSP_USING_UART=y
 CONFIG_BSP_USING_UART2=y
 # CONFIG_BSP_UART2_RX_USING_DMA is not set
-# CONFIG_BSP_USING_I2C1 is not set
-# CONFIG_BSP_USING_I2C2 is not set
-# CONFIG_BSP_USING_I2C3 is not set
+# CONFIG_BSP_USING_I2C is not set
 # CONFIG_BSP_USING_ONCHIP_RTC is not set
 
 #

bsp/stm32/stm32l476-st-nucleo/board/Kconfig

@@ -30,67 +30,66 @@ menu "On-chip Peripheral Drivers"
             config BSP_USING_UART2
                 bool "Enable UART2"
                 default n   
+                
             config BSP_UART2_RX_USING_DMA
                 bool "Enable UART2 RX DMA"
                 depends on BSP_USING_UART2 && RT_SERIAL_USING_DMA
                 default n
         endif
         
-    menuconfig BSP_USING_I2C1
-        bool "Enable I2C1 BUS (software simulation)"
+    menuconfig BSP_USING_I2C
+        bool "Enable I2C (software simulation)"
         default n
         select RT_USING_I2C
         select RT_USING_I2C_BITOPS
         select RT_USING_PIN
-        if BSP_USING_I2C1
-            config BSP_I2C1_SCL_PIN
-                int "i2c1 scl pin number"
-                range 1 176
-                default 22
-            config BSP_I2C1_SDA_PIN
-                int "I2C1 sda pin number"
-                range 1 176
-                default 23
-        endif
+        if BSP_USING_I2C
+            config BSP_USING_I2C1
+            bool "Enable I2C1 BUS (software simulation)"
+            default n
+            if BSP_USING_I2C1
+                config BSP_I2C1_SCL_PIN
+                    int "i2c1 scl pin number"
+                    range 1 176
+                    default 22
+                config BSP_I2C1_SDA_PIN
+                    int "I2C1 sda pin number"
+                    range 1 176
+                    default 23
+            endif
 
-    menuconfig BSP_USING_I2C2
-        bool "Enable I2C2 BUS (software simulation)"
-        default n
-        select RT_USING_I2C
-        select RT_USING_I2C_BITOPS
-        select RT_USING_PIN
-        if BSP_USING_I2C2
-            config BSP_I2C2_SCL_PIN
-                int "i2c2 scl pin number"
-                range 1 176
-                default 26
-            config BSP_I2C2_SDA_PIN
-                int "I2C2 sda pin number"
-                range 1 176
-                default 27
-        endif
+            config BSP_USING_I2C2
+            bool "Enable I2C2 BUS (software simulation)"
+            default n
+            if BSP_USING_I2C2
+                config BSP_I2C2_SCL_PIN
+                    int "i2c2 scl pin number"
+                    range 1 176
+                    default 26
+                config BSP_I2C2_SDA_PIN
+                    int "I2C2 sda pin number"
+                    range 1 176
+                    default 27
+            endif
 
-    menuconfig BSP_USING_I2C3
-        bool "Enable I2C3 BUS (software simulation)"
-        default n
-        select RT_USING_I2CS
-        select RT_USING_I2C_BITOPS
-        select RT_USING_PIN
-        if BSP_USING_I2C3
-            config BSP_I2C3_SCL_PIN
-                int "i2c3 scl pin number"
-                range 1 176
-                default 32
-            config BSP_I2C3_SDA_PIN
-                int "I2C3 sda pin number"
-                range 1 176
-                default 33
+            config BSP_USING_I2C3
+            bool "Enable I2C3 BUS (software simulation)"
+            default n
+            if BSP_USING_I2C3
+                config BSP_I2C3_SCL_PIN
+                    int "i2c3 scl pin number"
+                    range 1 176
+                    default 32
+                config BSP_I2C3_SDA_PIN
+                    int "I2C3 sda pin number"
+                    range 1 176
+                    default 33
+            endif
         endif
         
     config BSP_USING_ONCHIP_RTC
         bool "Enable RTC"
         select RT_USING_RTC
-        select RT_USING_LIBC
         default n
         
 endmenu

bsp/stm32/stm32l476-st-nucleo/board/board.c

@@ -16,10 +16,12 @@ void SystemClock_Config(void)
   RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
   RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
 
+#ifdef BSP_USING_ONCHIP_RTC
   /**Configure LSE Drive Capability 
   */
   HAL_PWR_EnableBkUpAccess();
   __HAL_RCC_LSEDRIVE_CONFIG(RCC_LSEDRIVE_LOW);
+#endif  
   /**Initializes the CPU, AHB and APB busses clocks 
   */
   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;

bsp/stm32/stm32l476-st-nucleo/rtconfig.h

@@ -78,9 +78,7 @@
 #define RT_PIPE_BUFSZ 512
 #define RT_USING_SERIAL
 #define RT_SERIAL_USING_DMA
-#define RT_SERIAL_RB_BUFSZ 64
 #define RT_USING_PIN
-#define RT_USING_RTC
 
 /* Using WiFi */