[bsp][bl] add drv_soft_i2c (#7406)

bsp/bouffalo_lab/libraries/rt_drivers/Kconfig

@@ -174,6 +174,56 @@ menu "General Drivers Configuration"
     config BSP_USING_ON_CHIP_FLASH
         bool "Enable on-chip FLASH"
         default n
-    
+    menu "General Purpose I2C"
+
+    menuconfig BSP_USING_I2C1
+        bool "Enable I2C1"
+        default n
+        select BSP_USING_I2C
+        select RT_USING_I2C
+        select RT_USING_I2C_BITOPS
+        select RT_USING_PIN
+        if BSP_USING_I2C1
+            choice
+                prompt "I2C1 SCL PIN"
+                default I2C1_SCL_USING_GPIO4 if BSP_USING_BL60X
+                default I2C1_SCL_USING_GPIO10 if BSP_USING_BL61X
+                default I2C1_SCL_USING_GPIO08 if BSP_USING_BL70X
+                default I2C1_SCL_USING_GPIO20 if BSP_USING_BL808
+
+                config I2C1_SCL_USING_GPIO0
+                    bool "GPIO_0"
+                config I2C1_SCL_USING_GPIO4
+                    bool "GPIO_4"
+                config I2C1_SCL_USING_GPIO8
+                    bool "GPIO_8"
+                config I2C1_SCL_USING_GPIO10
+                    bool "GPIO_10"
+                config I2C1_SCL_USING_GPIO20
+                    bool "GPIO_20"
+
+            endchoice
+            choice
+                prompt "I2C1 SDA PIN"
+                default I2C1_SDA_USING_GPIO3 if BSP_USING_BL60X
+                default I2C1_SDA_USING_GPIO11 if BSP_USING_BL61X
+                default I2C1_SDA_USING_GPIO7 if BSP_USING_BL70X
+                default I2C1_SDA_USING_GPIO21 if BSP_USING_BL808
+
+                config I2C1_SDA_USING_GPIO1
+                    bool "GPIO_1"
+                config I2C1_SDA_USING_GPIO3
+                    bool "GPIO_3"
+                config I2C1_SDA_USING_GPIO7
+                    bool "GPIO_7"
+                config I2C1_SDA_USING_GPIO11
+                    bool "GPIO_11"
+                config I2C1_SDA_USING_GPIO21
+                    bool "GPIO_21"
+
+            endchoice
+        endif
+    endmenu
+
 endmenu
 

bsp/bouffalo_lab/libraries/rt_drivers/SConscript

@@ -9,8 +9,8 @@ CPPPATH = [cwd]
 if GetDepend('BSP_USING_GPIO'):
     src += ['drv_gpio.c']
 
-if  GetDepend('BSP_USING_I2C'):
-    src += ['drv_i2c.c']
+if  GetDepend('RT_USING_I2C'):
+    src += ['drv_soft_i2c.c']
 
 if  GetDepend('BSP_USING_ADC'):
     src += ['drv_adc.c']

bsp/bouffalo_lab/libraries/rt_drivers/drv_soft_i2c.h

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023/04/15     chushicheng  first version
+ */
+
+#ifndef __DRV_I2C__
+#define __DRV_I2C__
+
+#include <rtthread.h>
+#include <rthw.h>
+#include <rtdevice.h>
+
+/* bl i2c dirver class */
+struct bl_i2c
+{
+    struct rt_i2c_bit_ops ops;
+    struct rt_i2c_bus_device i2c2_bus;
+};
+
+/* bl config class */
+struct bl_soft_i2c_config
+{
+    rt_uint8_t scl;
+    rt_uint8_t sda;
+    const char *bus_name;
+};
+
+#ifdef BSP_USING_I2C1
+#define I2C1_BUS_CONFIG                                  \
+    {                                                    \
+        .scl = BSP_I2C1_SCL_PIN,                         \
+        .sda = BSP_I2C1_SDA_PIN,                         \
+        .bus_name = "i2c1",                              \
+    }
+#endif
+
+int rt_hw_i2c_init(void);
+
+#endif