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.c

@@ -19,23 +19,32 @@
  * Change Logs:
  * Date           Author       Notes
  * 2017-08-08     Yang        the first version
+ * 2018-03-24     LaiYiKeTang add hardware iic
  */
- 
+
 #include <rtthread.h>
 #include <rtdevice.h>
 #include "board.h"
 #include "fsl_gpio.h"
 #include "fsl_lpi2c.h"
+#include "drv_i2c.h"
 
 //#define DRV_I2C_DEBUG
 
 #ifdef RT_USING_I2C
 
-#ifdef RT_USING_I2C_BITOPS
+#define I2C1BUS_NAME  "i2c1"
+#define I2C2BUS_NAME  "i2c2"
+#define I2C3BUS_NAME  "i2c3"
+#define I2C4BUS_NAME  "i2c4"
+
+/* Get frequency of lpi2c clock */
+#define LPI2C_CLOCK_FREQUENCY ((CLOCK_GetFreq(kCLOCK_Usb1PllClk) / 8) / (LPI2C_CLOCK_SOURCE_DIVIDER + 1U))
 
-#define I2CBUS_NAME             "i2c0"
+#if defined(RT_USING_I2C_BITOPS) && (defined(RT_USING_I2C1_BITOPS) || defined(RT_USING_I2C2_BITOPS) || \
+                                     defined(RT_USING_I2C3_BITOPS) || defined(RT_USING_I2C4_BITOPS))
 
-struct stm32_i2c_bit_data
+struct rt1052_i2c_bit_data
 {
     struct
     {
@@ -49,24 +58,24 @@ static void gpio_udelay(rt_uint32_t us)
     volatile rt_int32_t i;
     for (; us > 0; us--)
     {
-        i = 1000;
+        i = 100;
         while (i--);
     }
 }
 
-static void gpio_set_input(GPIO_Type* base, uint32_t pin)
+static void gpio_set_input(GPIO_Type *base, uint32_t pin)
 {
-    if (base->GDIR & (1 << pin))        //output mode
+    if (base->GDIR & (1 << pin))
     {
         base->GDIR &= ~(1 << pin);
         gpio_udelay(5);
     }
 }
 
-static void gpio_set_output(GPIO_Type* base, uint32_t pin)
+static void gpio_set_output(GPIO_Type *base, uint32_t pin)
 {
-    if (!(base->GDIR & (1 << pin)))        //input mode
-    {    
+    if (!(base->GDIR & (1 << pin)))
+    {
         base->GDIR |= (1 << pin);
         gpio_udelay(5);
     }
@@ -74,26 +83,26 @@ static void gpio_set_output(GPIO_Type* base, uint32_t pin)
 
 static void gpio_set_sda(void *data, rt_int32_t state)
 {
-    struct stm32_i2c_bit_data *bd = data;
-    
+    struct rt1052_i2c_bit_data *bd = data;
+
     gpio_set_output(bd->sda.base, bd->sda.pin);
-    
+
     GPIO_PinWrite(bd->sda.base, bd->sda.pin, !!state);
 }
 
 static void gpio_set_scl(void *data, rt_int32_t state)
 {
-    struct stm32_i2c_bit_data *bd = data;
-    
+    struct rt1052_i2c_bit_data *bd = data;
+
     gpio_set_output(bd->scl.base, bd->scl.pin);
-    
+
     GPIO_PinWrite(bd->scl.base, bd->scl.pin, !!state);
 }
 
 static rt_int32_t gpio_get_sda(void *data)
 {
-    struct stm32_i2c_bit_data *bd = data;
-    
+    struct rt1052_i2c_bit_data *bd = data;
+
     gpio_set_input(bd->sda.base, bd->sda.pin);
 
     return GPIO_ReadPinInput(bd->sda.base, bd->sda.pin);
@@ -101,89 +110,434 @@ static rt_int32_t gpio_get_sda(void *data)
 
 static rt_int32_t gpio_get_scl(void *data)
 {
-    struct stm32_i2c_bit_data *bd = data;
-    
+    struct rt1052_i2c_bit_data *bd = data;
+
     gpio_set_input(bd->scl.base, bd->scl.pin);
 
     return GPIO_ReadPinInput(bd->scl.base, bd->scl.pin);
 }
 
+#endif
 
-#else /* RT_USING_I2C_BITOPS */
-    // todo : add hardware i2c
-#endif /* RT_USING_I2C_BITOPS */
+#ifdef RT_USING_I2C1
+#ifdef RT_USING_I2C1_BITOPS
 
-int rt_hw_i2c_init(void)
+#else
+static struct rt1052_i2c_bus lpi2c1 =
+{
+    .I2C = LPI2C1,
+    .device_name = I2C1BUS_NAME,
+};
+#endif /* RT_USING_I2C1_BITOPS */
+#endif /* RT_USING_I2C1 */
+
+#ifdef RT_USING_I2C2
+#ifdef RT_USING_I2C2_BITOPS
+
+#else
+static struct rt1052_i2c_bus lpi2c2 =
+{
+    .I2C = LPI2C2,
+    .device_name = I2C2BUS_NAME,
+};
+#endif /* RT_USING_I2C2_BITOPS */
+#endif /* RT_USING_I2C2 */
+
+#ifdef RT_USING_I2C3
+#ifdef RT_USING_I2C3_BITOPS
+
+#else
+static struct rt1052_i2c_bus lpi2c3 =
+{
+    .I2C = LPI2C3,
+    .device_name = I2C3BUS_NAME,
+};
+
+#endif /* RT_USING_I2C3_BITOPS */
+#endif /* RT_USING_I2C3 */
+
+#ifdef RT_USING_I2C4
+
+#ifdef RT_USING_I2C4_BITOPS
+
+#else
+static struct rt1052_i2c_bus lpi2c4 =
+{
+    .I2C = LPI2C4,
+    .device_name = I2C4BUS_NAME,
+};
+#endif /* RT_USING_I2C1_BITOPS */
+
+#endif /* RT_USING_I2C4 */
+
+#if (defined(RT_USING_I2C1) || defined(RT_USING_I2C2) || \
+     defined(RT_USING_I2C3) || defined(RT_USING_I2C4))
+
+static rt_size_t imxrt_i2c_mst_xfer(struct rt_i2c_bus_device *bus,
+                                    struct rt_i2c_msg msgs[],
+                                    rt_uint32_t num);
+static rt_size_t imxrt_i2c_slv_xfer(struct rt_i2c_bus_device *bus,
+                                    struct rt_i2c_msg msgs[],
+                                    rt_uint32_t num);
+static rt_err_t imxrt_i2c_bus_control(struct rt_i2c_bus_device *bus,
+                                      rt_uint32_t,
+                                      rt_uint32_t);
+
+static const struct rt_i2c_bus_device_ops imxrt_i2c_ops =
+{
+    imxrt_i2c_mst_xfer,
+    imxrt_i2c_slv_xfer,
+    imxrt_i2c_bus_control,
+};
+
+#if !defined(RT_USING_I2C_BITOPS) || (!defined(RT_USING_I2C1_BITOPS) || !defined(RT_USING_I2C2_BITOPS) || \
+                                      !defined(RT_USING_I2C3_BITOPS) || !defined(RT_USING_I2C4_BITOPS))
+
+void imxrt_lpi2c_gpio_init(struct rt1052_i2c_bus *bus)
 {
-#ifdef RT_USING_I2C_BITOPS
-    /* register I2C1: SCL/P0_20 SDA/P0_19 */
+    if (bus->I2C == LPI2C1)
     {
-        static struct rt_i2c_bus_device i2c_device;
+        IOMUXC_SetPinMux(
+            IOMUXC_GPIO_AD_B1_00_LPI2C1_SCL,
+            1U);
+        IOMUXC_SetPinMux(
+            IOMUXC_GPIO_AD_B1_01_LPI2C1_SDA,
+            1U);
+        IOMUXC_SetPinConfig(
+            IOMUXC_GPIO_AD_B1_00_LPI2C1_SCL,
+            0xD8B0u);
+        IOMUXC_SetPinConfig(
+            IOMUXC_GPIO_AD_B1_01_LPI2C1_SDA,
+            0xD8B0u);
+    }
+    else if (bus->I2C == LPI2C2)
+    {
+        IOMUXC_SetPinMux(
+            IOMUXC_GPIO_B0_04_LPI2C2_SCL,
+            1U);
+        IOMUXC_SetPinMux(
+            IOMUXC_GPIO_B0_05_LPI2C2_SDA,
+            1U);
+        IOMUXC_SetPinConfig(
+            IOMUXC_GPIO_B0_04_LPI2C2_SCL,
+            0xD8B0u);
+        IOMUXC_SetPinConfig(
+            IOMUXC_GPIO_B0_05_LPI2C2_SDA,
+            0xD8B0u);
+    }
+    else if (bus->I2C == LPI2C3)
+    {
+        IOMUXC_SetPinMux(
+            IOMUXC_GPIO_AD_B1_07_LPI2C3_SCL,
+            1U);
+        IOMUXC_SetPinMux(
+            IOMUXC_GPIO_AD_B1_06_LPI2C3_SDA,
+            1U);
+        IOMUXC_SetPinConfig(
+            IOMUXC_GPIO_AD_B1_07_LPI2C3_SCL,
+            0xD8B0u);
+        IOMUXC_SetPinConfig(
+            IOMUXC_GPIO_AD_B1_06_LPI2C3_SDA,
+            0xD8B0u);
+    }
+    else if (bus->I2C == LPI2C4)
+    {
+        IOMUXC_SetPinMux(
+            IOMUXC_GPIO_EMC_12_LPI2C4_SCL,
+            1U);
+        IOMUXC_SetPinMux(
+            IOMUXC_GPIO_EMC_11_LPI2C4_SDA,
+            1U);
+        IOMUXC_SetPinConfig(
+            IOMUXC_GPIO_EMC_12_LPI2C4_SCL,
+            0xD8B0u);
+        IOMUXC_SetPinConfig(
+            IOMUXC_GPIO_EMC_11_LPI2C4_SDA,
+            0xD8B0u);
+    }
+    else
+    {
+        RT_ASSERT(RT_NULL);
+    }
+}
 
-        static const struct stm32_i2c_bit_data _i2c_bdata =
-        {
-            /* SCL */ {GPIO1, 16},
-            /* SDA */ {GPIO1, 17},
-        };
+static rt_err_t imxrt_lpi2c_configure(struct rt1052_i2c_bus *bus, lpi2c_master_config_t *cfg)
+{
+    RT_ASSERT(bus != RT_NULL);
+    RT_ASSERT(cfg != RT_NULL);
+
+    imxrt_lpi2c_gpio_init(bus);
+    bus->parent.ops = &imxrt_i2c_ops;
+    LPI2C_MasterInit(bus->I2C, cfg, LPI2C_CLOCK_FREQUENCY);
+    return RT_EOK;
+}
 
-        static const struct rt_i2c_bit_ops _i2c_bit_ops =
+#endif
+
+static rt_size_t imxrt_i2c_mst_xfer(struct rt_i2c_bus_device *bus,
+                                    struct rt_i2c_msg msgs[],
+                                    rt_uint32_t num)
+{
+    struct rt1052_i2c_bus *rt1052_i2c;
+    rt_uint32_t numbak;
+    rt_uint16_t i;
+    RT_ASSERT(bus != RT_NULL);
+    rt1052_i2c = (struct rt1052_i2c_bus *) bus;
+
+    rt1052_i2c->msg = msgs;
+    rt1052_i2c->msg_ptr = 0;
+    rt1052_i2c->msg_cnt = num;
+    rt1052_i2c->dptr = 0;
+
+    for (i = 0; i < num; i++)
+    {
+        if (rt1052_i2c->msg[i].flags & RT_I2C_RD)
         {
-            (void*)&_i2c_bdata,
-            gpio_set_sda,
-            gpio_set_scl,
-            gpio_get_sda,
-            gpio_get_scl,
-
-            gpio_udelay,
-
-            50,
-            1000
-        };
-
-        gpio_pin_config_t pin_config = {
-            kGPIO_DigitalOutput, 0,
-        };
-        
-        CLOCK_EnableClock(kCLOCK_Iomuxc);
-
-        IOMUXC_SetPinMux(IOMUXC_GPIO_AD_B1_00_GPIO1_IO16, 1U);
-            IOMUXC_SetPinConfig(IOMUXC_GPIO_AD_B1_00_GPIO1_IO16,
-            0xD8B0u);                                /* Slew Rate Field: Slow Slew Rate
-                                                        Drive Strength Field: R0/6
-                                                        Speed Field: medium(100MHz)
-                                                        Open Drain Enable Field: Open Drain Enabled
-                                                        Pull / Keep Enable Field: Pull/Keeper Enabled
-                                                        Pull / Keep Select Field: Keeper
-                                                        Pull Up / Down Config. Field: 22K Ohm Pull Up
-                                                        Hyst. Enable Field: Hysteresis Disabled */
-        IOMUXC_SetPinMux(IOMUXC_GPIO_AD_B1_01_GPIO1_IO17, 1U);
-            IOMUXC_SetPinConfig(IOMUXC_GPIO_AD_B1_01_GPIO1_IO17,
-            0xD8B0u);                                /* Slew Rate Field: Slow Slew Rate
-                                                        Drive Strength Field: R0/6
-                                                        Speed Field: medium(100MHz)
-                                                        Open Drain Enable Field: Open Drain Enabled
-                                                        Pull / Keep Enable Field: Pull/Keeper Enabled
-                                                        Pull / Keep Select Field: Keeper
-                                                        Pull Up / Down Config. Field: 22K Ohm Pull Up
-                                                        Hyst. Enable Field: Hysteresis Disabled */
-        /* Enable touch panel controller */
-        GPIO_PinInit(_i2c_bdata.sda.base, _i2c_bdata.sda.pin, &pin_config);
-        GPIO_PinInit(_i2c_bdata.scl.base, _i2c_bdata.scl.pin, &pin_config);
-        
-        GPIO_PortSet(_i2c_bdata.sda.base, _i2c_bdata.sda.pin);
-        GPIO_PortSet(_i2c_bdata.scl.base, _i2c_bdata.scl.pin);
-        
-        //RT_ASSERT(gpio_get_scl(&_i2c_bdata) != 0);
-        //RT_ASSERT(gpio_get_sda(&_i2c_bdata) != 0);
-
-        i2c_device.priv = (void *)&_i2c_bit_ops;
-        rt_i2c_bit_add_bus(&i2c_device, I2CBUS_NAME);
-    } /* register I2C */
-
-#else /* RT_USING_I2C_BITOPS */
-    // Todo : add hardware i2c
-
-#endif /* RT_USING_I2C_BITOPS */
+            LPI2C_MasterStart(rt1052_i2c->I2C, rt1052_i2c->msg[i].addr, kLPI2C_Read);
+            if (LPI2C_MasterReceive(rt1052_i2c->I2C, rt1052_i2c->msg->buf, rt1052_i2c->msg->len) == kStatus_LPI2C_Nak)
+            {
+                i = 0;
+                break;
+            }
+        }
+        else
+        {
+            LPI2C_MasterStart(rt1052_i2c->I2C, rt1052_i2c->msg[i].addr, kLPI2C_Write);
+            if (LPI2C_MasterSend(rt1052_i2c->I2C, rt1052_i2c->msg->buf, rt1052_i2c->msg->len) == kStatus_LPI2C_Nak)
+            {
+                i = 0;
+                break;
+            }
+        }
+    }
+
+    i2c_dbg("send stop condition\n");
+    LPI2C_MasterStop(rt1052_i2c->I2C);
+
+    numbak = i;
+    rt1052_i2c->msg = RT_NULL;
+    rt1052_i2c->msg_ptr = 0;
+    rt1052_i2c->msg_cnt = 0;
+    rt1052_i2c->dptr = 0;
+    return numbak;
+}
+static rt_size_t imxrt_i2c_slv_xfer(struct rt_i2c_bus_device *bus,
+                                    struct rt_i2c_msg msgs[],
+                                    rt_uint32_t num)
+{
+    return 0;
+}
+static rt_err_t imxrt_i2c_bus_control(struct rt_i2c_bus_device *bus,
+                                      rt_uint32_t cmd,
+                                      rt_uint32_t arg)
+{
+    return RT_ERROR;
+}
+
+#endif
+
+int rt_hw_i2c_init(void)
+{
+#if !defined(RT_USING_I2C_BITOPS) || (!defined(RT_USING_I2C1_BITOPS) || !defined(RT_USING_I2C2_BITOPS) || \
+                                      !defined(RT_USING_I2C3_BITOPS) || !defined(RT_USING_I2C4_BITOPS))
+
+    lpi2c_master_config_t masterConfig = {0};
+
+    /*Clock setting for LPI2C*/
+    CLOCK_SetMux(kCLOCK_Lpi2cMux, 0);
+    CLOCK_SetDiv(kCLOCK_Lpi2cDiv, LPI2C_CLOCK_SOURCE_DIVIDER);
+
+#endif
+
+#if defined(RT_USING_I2C_BITOPS) && (defined(RT_USING_I2C1_BITOPS) || defined(RT_USING_I2C2_BITOPS) || \
+                                     defined(RT_USING_I2C3_BITOPS) || defined(RT_USING_I2C4_BITOPS))
+    gpio_pin_config_t pin_config =
+    {
+        kGPIO_DigitalOutput,
+        0,
+    };
+#endif /* RT_USING_I2C_BITOPS= RT_USING_I2C1_BITOPS RT_USING_I2C2_BITOPS RT_USING_I2C3_BITOPS RT_USING_I2C4_BITOPS */
+#if defined(RT_USING_I2C1) && defined(RT_USING_I2C1_BITOPS)
+
+    static struct rt_i2c_bus_device i2c1_device;
+
+    static const struct rt1052_i2c_bit_data _i2c1_bdata =
+    {
+        /* SCL */ {GPIO1, 16},
+        /* SDA */ {GPIO1, 17},
+    };
+
+    static const struct rt_i2c_bit_ops _i2c1_bit_ops =
+    {
+        (void *) &_i2c1_bdata,
+        gpio_set_sda,
+        gpio_set_scl,
+        gpio_get_sda,
+        gpio_get_scl,
+
+        gpio_udelay,
+
+        50,
+        1000
+    };
+
+    IOMUXC_SetPinMux(IOMUXC_GPIO_AD_B1_00_GPIO1_IO16, 1U);
+    IOMUXC_SetPinConfig(IOMUXC_GPIO_AD_B1_00_GPIO1_IO16, 0xD8B0u);
+    IOMUXC_SetPinMux(IOMUXC_GPIO_AD_B1_01_GPIO1_IO17, 1U);
+    IOMUXC_SetPinConfig(IOMUXC_GPIO_AD_B1_01_GPIO1_IO17, 0xD8B0u);
+
+    /* Enable touch panel controller */
+    GPIO_PinInit(_i2c1_bdata.sda.base, _i2c1_bdata.sda.pin, &pin_config);
+    GPIO_PinInit(_i2c1_bdata.scl.base, _i2c1_bdata.scl.pin, &pin_config);
+
+    GPIO_PortSet(_i2c1_bdata.sda.base, _i2c1_bdata.sda.pin);
+    GPIO_PortSet(_i2c1_bdata.scl.base, _i2c1_bdata.scl.pin);
+
+    i2c1_device.priv = (void *) &_i2c1_bit_ops;
+    rt_i2c_bit_add_bus(&i2c1_device, I2C1BUS_NAME);
+
+#elif   defined(RT_USING_I2C1) && !defined(RT_USING_I2C1_BITOPS)
+    LPI2C_MasterGetDefaultConfig(&masterConfig);
+    imxrt_lpi2c_configure(&lpi2c1, &masterConfig);
+    rt_i2c_bus_device_register(&lpi2c1.parent, lpi2c1.device_name);
+#endif
+#if defined(RT_USING_I2C2) && defined(RT_USING_I2C2_BITOPS)
+
+    static struct rt_i2c_bus_device i2c2_device;
+
+    static const struct rt1052_i2c_bit_data _i2c2_bdata =
+    {
+        /* SCL */ {GPIO2, 4},
+        /* SDA */ {GPIO2, 5},
+    };
+
+    static const struct rt_i2c_bit_ops _i2c2_bit_ops =
+    {
+        (void *) &_i2c2_bdata,
+        gpio_set_sda,
+        gpio_set_scl,
+        gpio_get_sda,
+        gpio_get_scl,
+
+        gpio_udelay,
+
+        50,
+        1000
+    };
+
+    IOMUXC_SetPinMux(IOMUXC_GPIO_B0_04_GPIO2_IO04, 1U);
+    IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_04_GPIO2_IO04, 0xD8B0u);
+    IOMUXC_SetPinMux(IOMUXC_GPIO_B0_05_GPIO2_IO05, 1U);
+    IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_05_GPIO2_IO05, 0xD8B0u);
+
+    /* Enable touch panel controller */
+    GPIO_PinInit(_i2c2_bdata.sda.base, _i2c2_bdata.sda.pin, &pin_config);
+    GPIO_PinInit(_i2c2_bdata.scl.base, _i2c2_bdata.scl.pin, &pin_config);
+
+    GPIO_PortSet(_i2c2_bdata.sda.base, _i2c2_bdata.sda.pin);
+    GPIO_PortSet(_i2c2_bdata.scl.base, _i2c2_bdata.scl.pin);
+
+
+    i2c2_device.priv = (void *) &_i2c2_bit_ops;
+    rt_i2c_bit_add_bus(&i2c2_device, I2C2BUS_NAME);
+
+#elif   defined(RT_USING_I2C2) && !defined(RT_USING_I2C2_BITOPS)
+    LPI2C_MasterGetDefaultConfig(&masterConfig);
+    imxrt_lpi2c_configure(&lpi2c2, &masterConfig);
+    rt_i2c_bus_device_register(&lpi2c2.parent, lpi2c2.device_name);
+#endif
+#if defined(RT_USING_I2C3) && defined(RT_USING_I2C3_BITOPS)
+
+    static struct rt_i2c_bus_device i2c3_device;
+
+    static const struct rt1052_i2c_bit_data _i2c3_bdata =
+    {
+        /* SCL */ {GPIO1, 23},
+        /* SDA */ {GPIO1, 22},
+    };
+
+    static const struct rt_i2c_bit_ops _i2c3_bit_ops =
+    {
+        (void *) &_i2c3_bdata,
+        gpio_set_sda,
+        gpio_set_scl,
+        gpio_get_sda,
+        gpio_get_scl,
+
+        gpio_udelay,
+
+        50,
+        1000
+    };
+
+    IOMUXC_SetPinMux(IOMUXC_GPIO_AD_B1_07_GPIO1_IO23, 1U);
+    IOMUXC_SetPinConfig(IOMUXC_GPIO_AD_B1_07_GPIO1_IO23, 0xD8B0u);
+    IOMUXC_SetPinMux(IOMUXC_GPIO_AD_B1_06_GPIO1_IO22, 1U);
+    IOMUXC_SetPinConfig(IOMUXC_GPIO_AD_B1_06_GPIO1_IO22, 0xD8B0u);
+
+    /* Enable touch panel controller */
+    GPIO_PinInit(_i2c3_bdata.sda.base, _i2c3_bdata.sda.pin, &pin_config);
+    GPIO_PinInit(_i2c3_bdata.scl.base, _i2c3_bdata.scl.pin, &pin_config);
+
+    GPIO_PortSet(_i2c3_bdata.sda.base, _i2c3_bdata.sda.pin);
+    GPIO_PortSet(_i2c3_bdata.scl.base, _i2c3_bdata.scl.pin);
+
+
+    i2c3_device.priv = (void *) &_i2c3_bit_ops;
+    rt_i2c_bit_add_bus(&i2c3_device, I2C3BUS_NAME);
+
+#elif   defined(RT_USING_I2C3) && !defined(RT_USING_I2C3_BITOPS)
+    LPI2C_MasterGetDefaultConfig(&masterConfig);
+    imxrt_lpi2c_configure(&lpi2c3, &masterConfig);
+    rt_i2c_bus_device_register(&lpi2c3.parent, lpi2c3.device_name);
+#endif
+#if defined(RT_USING_I2C4) && defined(RT_USING_I2C4_BITOPS)
+
+    static struct rt_i2c_bus_device i2c4_device;
+
+    static const struct rt1052_i2c_bit_data _i2c4_bdata =
+    {
+        /* SCL */ {GPIO4, 12},
+        /* SDA */ {GPIO4, 11},
+    };
+
+    static const struct rt_i2c_bit_ops _i2c4_bit_ops =
+    {
+        (void *) &_i2c4_bdata,
+        gpio_set_sda,
+        gpio_set_scl,
+        gpio_get_sda,
+        gpio_get_scl,
+
+        gpio_udelay,
+
+        50,
+        1000
+    };
+
+    IOMUXC_SetPinMux(IOMUXC_GPIO_EMC_12_GPIO4_IO12, 1U);
+    IOMUXC_SetPinConfig(IOMUXC_GPIO_EMC_12_GPIO4_IO12, 0xD8B0u);
+    IOMUXC_SetPinMux(IOMUXC_GPIO_EMC_11_GPIO4_IO11, 1U);
+    IOMUXC_SetPinConfig(IOMUXC_GPIO_EMC_11_GPIO4_IO11, 0xD8B0u);
+
+    /* Enable touch panel controller */
+    GPIO_PinInit(_i2c4_bdata.sda.base, _i2c4_bdata.sda.pin, &pin_config);
+    GPIO_PinInit(_i2c4_bdata.scl.base, _i2c4_bdata.scl.pin, &pin_config);
+
+    GPIO_PortSet(_i2c4_bdata.sda.base, _i2c4_bdata.sda.pin);
+    GPIO_PortSet(_i2c4_bdata.scl.base, _i2c4_bdata.scl.pin);
+
+
+    i2c4_device.priv = (void *) &_i2c4_bit_ops;
+    rt_i2c_bit_add_bus(&i2c4_device, I2C4BUS_NAME);
+
+#elif   defined(RT_USING_I2C4) && !defined(RT_USING_I2C4_BITOPS)
+    LPI2C_MasterGetDefaultConfig(&masterConfig);
+    imxrt_lpi2c_configure(&lpi2c4, &masterConfig);
+    rt_i2c_bus_device_register(&lpi2c4.parent, lpi2c4.device_name);
+#endif
+
+
 
     return 0;
 }
@@ -197,7 +551,7 @@ static rt_device_t _i2c_find(const char *name)
     rt_device_t dev;
 
     dev = rt_device_find(name);
-    if (!dev) 
+    if (!dev)
     {
         rt_kprintf("search device failed: %s\n", name);
         return RT_NULL;
@@ -210,7 +564,7 @@ static rt_device_t _i2c_find(const char *name)
     }
 
     rt_kprintf("open i2c bus: %s\n", name);
-    
+
     return dev;
 }
 
@@ -231,7 +585,7 @@ static void _search_i2c_device(rt_device_t dev, uint8_t cmd)
     for (int i = 0; i <= 0x7f; i++)
     {
         int len;
-        
+
         msgs[0].addr  = i;
         msgs[1].addr  = i;
         len = rt_i2c_transfer((struct rt_i2c_bus_device *)dev, msgs, 2);
@@ -239,9 +593,9 @@ static void _search_i2c_device(rt_device_t dev, uint8_t cmd)
         {
             count++;
             rt_kprintf("add:%02X transfer success, id: %02X\n", i, buf);
-        } 
+        }
     }
-    
+
     rt_kprintf("i2c device: %d\n", count);
 }
 
@@ -253,14 +607,16 @@ static int i2c_test(const char *name, uint8_t cmd)
         rt_kprintf("search i2c device faild\n");
         return -1;
     }
-    
+
     _search_i2c_device(dev, cmd);
-    
+
     rt_device_close(dev);
-    
+
     return 0;
 }
-FINSH_FUNCTION_EXPORT(i2c_test, e.g: i2c_test("i2c0", 0xA3));
+FINSH_FUNCTION_EXPORT(i2c_test, e.g: i2c_test("i2c1", 0xA3));
 #endif
 
 #endif /* RT_USING_I2C */
+
+

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
+