Merge pull request #1340 from balanceTWK/master

[bsp][imxrt1052] add hardware i2c

bsp/imxrt1052-evk/Kconfig

@@ -93,7 +93,7 @@ menu "Select spi bus drivers"
 
     config LPSPI_CLK_SOURCE_DIVIDER
         int "SPI bus clock source divider"
-        range 0 8
+        range 1 8
         default 7
 
     config RT_USING_SPIBUS1
@@ -225,6 +225,58 @@ menu "Select spi bus drivers"
     endchoice
 endmenu
 
+menu "Select iic drivers"
+
+    config LPI2C_CLOCK_SOURCE_DIVIDER
+        int "lpi2c bus clock source divider"
+        range 1 64
+        default 4
+		
+    config RT_USING_I2C1
+        bool "USING I2C1"
+        select RT_USING_I2C
+        default n 
+		if RT_USING_I2C1
+		config RT_USING_I2C1_BITOPS
+		select RT_USING_I2C_BITOPS
+		default n
+        bool "using simulate I2C1"
+		endif
+
+    config RT_USING_I2C2
+        bool "USING I2C2"
+        select RT_USING_I2C
+        default n 
+		if RT_USING_I2C2
+		config RT_USING_I2C2_BITOPS
+		select RT_USING_I2C_BITOPS
+		default n
+        bool "using simulate I2C2"
+		endif
+
+    config RT_USING_I2C3
+        bool "USING I2C3"
+        select RT_USING_I2C
+        default n 
+		if RT_USING_I2C3
+		config RT_USING_I2C3_BITOPS
+		select RT_USING_I2C_BITOPS
+		default n
+        bool "using simulate I2C3"
+		endif
+
+    config RT_USING_I2C4
+        bool "USING I2C4"
+        select RT_USING_I2C
+        default n 
+		if RT_USING_I2C4
+		config RT_USING_I2C4_BITOPS
+		select RT_USING_I2C_BITOPS
+		default n
+        bool "using simulate I2C4"
+		endif
+endmenu
+
 #menu "SDRAM driver support"
     config RT_USING_SDRAM
         bool "Using sdram"

bsp/imxrt1052-evk/drivers/SConscript

@@ -30,6 +30,10 @@ if GetDepend('RT_USING_RTC_HP'):
 if GetDepend('RT_USING_SPI'):
     src += ['drv_spi_bus.c']
 
+# add i2cbus driver code
+if GetDepend('RT_USING_I2C'):
+    src += ['drv_i2c.c']
+
 if GetDepend('BOARD_RT1050_EVK'):
     src += ['hyper_flash_boot.c']
 

bsp/imxrt1052-evk/drivers/drv_i2c.h

@@ -0,0 +1,34 @@
+/*
+ * File      : drv_i2c.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2009, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2018-03-24     LaiYiKeTang  the first version
+ */
+
+#ifndef __DRVI2C_H__
+#define __DRVI2C_H__
+
+#include <rthw.h>
+#include <rtthread.h>
+#include <rtdevice.h>
+#include "board.h"
+struct rt1052_i2c_bus
+{
+    struct rt_i2c_bus_device parent;
+    LPI2C_Type *I2C;
+    struct rt_i2c_msg *msg;
+    rt_uint32_t msg_cnt;
+    volatile rt_uint32_t msg_ptr;
+    volatile rt_uint32_t dptr;
+    char *device_name;
+};
+
+#endif
+