[bsp][lpc55s69]add softi2c (#7221)

bsp/lpc55sxx/Libraries/drivers/SConscript

@@ -49,6 +49,9 @@ if  GetDepend('BSP_USING_I2S'):
 if  GetDepend('BSP_USING_WM8904'):
     src += ['drv_sound_wm8904.c']
 
+if  GetDepend('BSP_USING_SOFT_I2C'):
+    src += ['drv_soft_i2c.c']
+    
 path =  [cwd,cwd + '/config']
 
 group = DefineGroup('Drivers', src, depend = [''], CPPPATH = path)

bsp/lpc55sxx/Libraries/drivers/drv_soft_i2c.c

@@ -0,0 +1,213 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-04-11     linshire     the first version
+ */
+
+#include <board.h>
+#include "drv_soft_i2c.h"
+
+#ifdef RT_USING_I2C
+
+#define LOG_TAG              "drv.i2c"
+#include <drv_log.h>
+
+#if !defined(BSP_USING_I2C1) && !defined(BSP_USING_I2C2) && !defined(BSP_USING_I2C3) && !defined(BSP_USING_I2C4)
+#error "Please define at least one BSP_USING_I2Cx"
+/* this driver can be disabled at menuconfig -> RT-Thread Components -> Device Drivers */
+#endif
+
+static const struct lpc55s69_soft_i2c_config soft_i2c_config[] =
+{
+#ifdef BSP_USING_SOFT_I2C1
+    SOFT_I2C1_BUS_CONFIG,
+#endif
+#ifdef BSP_USING_SOFT_I2C2
+    SOFT_I2C2_BUS_CONFIG,
+#endif
+};
+
+static struct lpc55s69_i2c i2c_obj[sizeof(soft_i2c_config) / sizeof(soft_i2c_config[0])];
+
+/**
+ * This function initializes the i2c pin.
+ *
+ * @param lpc55s69 i2c dirver class.
+ */
+static void lpc55s69_i2c_gpio_init(struct lpc55s69_i2c *i2c)
+{
+    struct lpc55s69_soft_i2c_config* cfg = (struct lpc55s69_soft_i2c_config*)i2c->ops.data;
+
+    rt_pin_mode(cfg->scl, PIN_MODE_OUTPUT_OD);
+    rt_pin_mode(cfg->sda, PIN_MODE_OUTPUT_OD);
+
+    rt_pin_write(cfg->scl, PIN_HIGH);
+    rt_pin_write(cfg->sda, PIN_HIGH);
+}
+
+/**
+ * This function sets the sda pin.
+ *
+ * @param lpc55s69 config class.
+ * @param The sda pin state.
+ */
+static void lpc55s69_set_sda(void *data, rt_int32_t state)
+{
+    struct lpc55s69_soft_i2c_config* cfg = (struct lpc55s69_soft_i2c_config*)data;
+    if (state)
+    {
+        rt_pin_write(cfg->sda, PIN_HIGH);
+    }
+    else
+    {
+        rt_pin_write(cfg->sda, PIN_LOW);
+    }
+}
+
+/**
+ * This function sets the scl pin.
+ *
+ * @param lpc55s69 config class.
+ * @param The scl pin state.
+ */
+static void lpc55s69_set_scl(void *data, rt_int32_t state)
+{
+    struct lpc55s69_soft_i2c_config* cfg = (struct lpc55s69_soft_i2c_config*)data;
+    if (state)
+    {
+        rt_pin_write(cfg->scl, PIN_HIGH);
+    }
+    else
+    {
+        rt_pin_write(cfg->scl, PIN_LOW);
+    }
+}
+
+
+/**
+ * This function gets the sda pin state.
+ *
+ * @param The sda pin state.
+ */
+static rt_int32_t lpc55s69_get_sda(void *data)
+{
+    struct lpc55s69_soft_i2c_config* cfg = (struct lpc55s69_soft_i2c_config*)data;
+    return rt_pin_read(cfg->sda);
+}
+
+/**
+ * This function gets the scl pin state.
+ *
+ * @param The scl pin state.
+ */
+static rt_int32_t lpc55s69_get_scl(void *data)
+{
+    struct lpc55s69_soft_i2c_config* cfg = (struct lpc55s69_soft_i2c_config*)data;
+    return rt_pin_read(cfg->scl);
+}
+/**
+ * The time delay function.
+ *
+ * @param microseconds.
+ */
+static void lpc55s69_udelay(rt_uint32_t us)
+{
+    rt_uint32_t ticks;
+    rt_uint32_t told, tnow, tcnt = 0;
+    rt_uint32_t reload = SysTick->LOAD;
+
+    ticks = us * reload / (1000000 / RT_TICK_PER_SECOND);
+    told = SysTick->VAL;
+    while (1)
+    {
+        tnow = SysTick->VAL;
+        if (tnow != told)
+        {
+            if (tnow < told)
+            {
+                tcnt += told - tnow;
+            }
+            else
+            {
+                tcnt += reload - tnow + told;
+            }
+            told = tnow;
+            if (tcnt >= ticks)
+            {
+                break;
+            }
+        }
+    }
+}
+
+static const struct rt_i2c_bit_ops lpc55s69_bit_ops_default =
+{
+    .data     = RT_NULL,
+    .set_sda  = lpc55s69_set_sda,
+    .set_scl  = lpc55s69_set_scl,
+    .get_sda  = lpc55s69_get_sda,
+    .get_scl  = lpc55s69_get_scl,
+    .udelay   = lpc55s69_udelay,
+    .delay_us = 1,
+    .timeout  = 100
+};
+
+/**
+ * if i2c is locked, this function will unlock it
+ *
+ * @param lpc55s69 config class
+ *
+ * @return RT_EOK indicates successful unlock.
+ */
+static rt_err_t lpc55s69_i2c_bus_unlock(const struct lpc55s69_soft_i2c_config *cfg)
+{
+    rt_int32_t i = 0;
+
+    if (PIN_LOW == rt_pin_read(cfg->sda))
+    {
+        while (i++ < 9)
+        {
+            rt_pin_write(cfg->scl, PIN_HIGH);
+            lpc55s69_udelay(100);
+            rt_pin_write(cfg->scl, PIN_LOW);
+            lpc55s69_udelay(100);
+        }
+    }
+    if (PIN_LOW == rt_pin_read(cfg->sda))
+    {
+        return -RT_ERROR;
+    }
+
+    return RT_EOK;
+}
+
+/* I2C initialization function */
+int rt_hw_i2c_init(void)
+{
+    rt_err_t result;
+
+    for (rt_size_t i = 0; i < sizeof(i2c_obj) / sizeof(struct lpc55s69_i2c); i++)
+    {
+        i2c_obj[i].ops = lpc55s69_bit_ops_default;
+        i2c_obj[i].ops.data = (void*)&soft_i2c_config[i];
+        i2c_obj[i].i2c2_bus.priv = &i2c_obj[i].ops;
+        lpc55s69_i2c_gpio_init(&i2c_obj[i]);
+        result = rt_i2c_bit_add_bus(&i2c_obj[i].i2c2_bus, soft_i2c_config[i].bus_name);
+        RT_ASSERT(result == RT_EOK);
+        lpc55s69_i2c_bus_unlock(&soft_i2c_config[i]);
+
+        LOG_D("software simulation %s init done, pin scl: %d, pin sda %d",
+        soft_i2c_config[i].bus_name,
+        soft_i2c_config[i].scl,
+        soft_i2c_config[i].sda);
+    }
+
+    return RT_EOK;
+}
+INIT_BOARD_EXPORT(rt_hw_i2c_init);
+
+#endif /* RT_USING_I2C */

bsp/lpc55sxx/Libraries/drivers/drv_soft_i2c.h

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-04-11     linshrie     first version
+ */
+
+#ifndef __DRV_I2C__
+#define __DRV_I2C__
+
+#include <rtthread.h>
+#include <rthw.h>
+#include <rtdevice.h>
+
+/* lpc55s69 config class */
+struct lpc55s69_soft_i2c_config
+{
+    rt_uint8_t scl;
+    rt_uint8_t sda;
+    const char *bus_name;
+};
+/* lpc55s69 i2c dirver class */
+struct lpc55s69_i2c
+{
+    struct rt_i2c_bit_ops ops;
+    struct rt_i2c_bus_device i2c2_bus;
+};
+
+#ifdef BSP_USING_SOFT_I2C1
+#define SOFT_I2C1_BUS_CONFIG                             \
+    {                                                    \
+        .scl = BSP_SOFT_I2C1_SCL_PIN,                    \
+        .sda = BSP_SOFT_I2C1_SCL_PIN,                    \
+        .bus_name = "i2c1",                              \
+    }
+#endif
+
+#ifdef BSP_USING_SOFT_I2C2
+#define SOFT_I2C2_BUS_CONFIG                             \
+    {                                                    \
+        .scl = BSP_SOFT_I2C2_SCL_PIN,                    \
+        .sda = BSP_SOFT_I2C2_SCL_PIN,                    \
+        .bus_name = "i2c2",                              \
+    }
+#endif /*BSP_USING_I2C2*/
+
+int rt_hw_i2c_init(void);
+
+#endif

bsp/lpc55sxx/lpc55s69_nxp_evk/board/Kconfig

@@ -116,6 +116,48 @@ menu "On-chip Peripheral Drivers"
                         endchoice
                     endif
             endif
+    
+    menuconfig BSP_USING_SOFT_I2C
+        bool "Enable I2C Bus"
+        select RT_USING_I2C
+        select RT_USING_I2C_BITOPS
+        select RT_USING_PIN
+        default n
+
+        if BSP_USING_SOFT_I2C
+            config BSP_USING_SOFT_I2C1
+                bool "Enable I2C1 Bus (software simulation)"
+                default n
+
+                if BSP_USING_SOFT_I2C1
+                    comment "Notice: PB10 --> 26; PB11 --> 27"
+
+                    config BSP_SOFT_I2C1_SCL_PIN
+                        int "i2c1 SCL pin number"
+                        range 0 79
+                        default 26
+                    config BSP_SOFT_I2C1_SDA_PIN
+                        int "i2c1 SDA pin number"
+                        range 0 79
+                        default 27
+                endif
+
+            config BSP_USING_SOFT_I2C2
+                bool "Enable I2C2 Bus (software simulation)"
+                default n
+
+                if BSP_USING_SOFT_I2C2
+                    comment "Notice: PC1 --> 33; PC0 --> 32"
+                    config BSP_SOFT_I2C2_SCL_PIN
+                        int "i2c2 SCL pin number"
+                        range 0 79
+                        default 32
+                    config BSP_SOFT_I2C2_SDA_PIN
+                        int "i2c2 SDA pin number"
+                        range 0 79
+                        default 33
+                endif
+        endif
 
     menuconfig BSP_USING_SPI
         config BSP_USING_SPI

bsp/lpc55sxx/tools/sdk_dist.py

@@ -18,3 +18,20 @@ def dist_do_building(BSP_ROOT, dist_dir):
     print("=> copy bsp library")
     bsp_copy_files(os.path.join(library_path, rtconfig.BSP_LIBRARY_TYPE), os.path.join(library_dir, rtconfig.BSP_LIBRARY_TYPE))
     shutil.copyfile(os.path.join(library_path, 'Kconfig'), os.path.join(library_dir, 'Kconfig'))
+    
+    # change RTT_ROOT in Kconfig
+    if not os.path.isfile(os.path.join(dist_dir, 'Kconfig')):
+        return
+
+    with open(os.path.join(dist_dir, 'Kconfig'), 'r') as f:
+        data = f.readlines()
+    with open(os.path.join(dist_dir, 'Kconfig'), 'w') as f:
+        found = 0
+        for line in data:
+            if line.find('RTT_ROOT') != -1:
+                found = 1
+            if line.find('../Libraries') != -1 and found:
+                position = line.find('../Libraries')
+                line = line[0:position] + 'Libraries/Kconfig"\n'
+                found = 0
+            f.write(line)