!201 添加rt-link组件

Merge pull request !201 from lin123/rt-smart

components/utilities/Kconfig

@@ -205,4 +205,5 @@ config RT_USING_UTEST
             default 20
     endif
 
+source "$RTT_DIR/components/utilities/rt-link/Kconfig"
 endmenu

components/utilities/rt-link/Kconfig

+# Kconfig file for rt_link
+menuconfig RT_USING_RT_LINK
+    bool "RT-Link"
+    default n
+
+if RT_USING_RT_LINK
+    choice
+        prompt"use hw crc device or not"
+        default RT_LINK_USING_SF_CRC
+        
+        config RT_LINK_USING_SF_CRC
+            bool "use software crc table"
+        config RT_LINK_USING_HW_CRC
+            bool "use hardware crc device"
+    endchoice
+
+    menu "rt-link hardware device configuration"
+        config RT_LINK_HW_DEVICE_NAME
+            string "the name of base actual device"
+            default "uart2"
+
+        choice
+            prompt"hardware device is spi, uart or usb"
+            default RT_LINK_USING_UART
+
+            config RT_LINK_USING_UART
+                bool "use UART"
+        endchoice
+
+    endmenu
+
+    menu "rt link debug option"
+        config USING_RT_LINK_DEBUG
+            bool "Enable RT-Link debug"
+            default n
+        config USING_RT_LINK_HW_DEBUG
+            bool "Enable RT-Link hw debug"
+            default n
+    endmenu
+endif

components/utilities/rt-link/SConscript

+# RT-Thread building script for bridge
+
+import os
+from building import *
+
+cwd = GetCurrentDir()
+objs = []
+list = os.listdir(cwd)
+
+for d in list:
+    path = os.path.join(cwd, d)
+    if os.path.isfile(os.path.join(path, 'SConscript')):
+        objs = objs + SConscript(os.path.join(d, 'SConscript'))
+
+Return('objs')

components/utilities/rt-link/hw_port/SConscript

+import os
+from building import *
+import rtconfig
+
+cwd  = GetCurrentDir()
+src  = []
+CPPPATH = []
+
+if GetDepend('RT_LINK_USING_UART'):
+    src += ['uart/rtlink_port_uart.c']
+
+group = DefineGroup('rt-link-port', src, depend = ['RT_USING_RT_LINK'], CPPPATH = CPPPATH)
+
+Return('group')

components/utilities/rt-link/hw_port/uart/rtlink_port_uart.c

+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2020-12-09     xiangxistu   the first version
+ */
+
+#include <rtthread.h>
+#include <rtdevice.h>
+
+#include <rtlink_port.h>
+
+#ifndef RT_LINK_HW_DEVICE_NAME
+    #define RT_LINK_HW_DEVICE_NAME "uart2"
+#endif
+
+#define DBG_TAG              "rtlink_port"
+#define DBG_LVL              DBG_INFO
+#include <rtdbg.h>
+
+static struct rt_device *hw_device = RT_NULL;
+rt_err_t rt_link_port_rx_ind(rt_device_t device, rt_size_t size)
+{
+    RT_ASSERT(device != RT_NULL);
+
+    rt_uint8_t buffer[RT_SERIAL_RB_BUFSZ] = {0};
+    rt_size_t length = 0;
+    length = rt_device_read(device, 0, buffer, sizeof(buffer));
+    rt_link_hw_write_cb(&buffer, length);
+    return RT_EOK;
+}
+
+rt_size_t rt_link_port_send(void *data, rt_size_t length)
+{
+    rt_size_t size = 0;
+    size = rt_device_write(hw_device, 0, data, length);
+    return size;
+}
+
+int rt_link_port_init(void)
+{
+    hw_device = rt_device_find(RT_LINK_HW_DEVICE_NAME);
+    if (hw_device)
+    {
+        rt_device_open(hw_device, RT_DEVICE_OFLAG_RDWR | RT_DEVICE_FLAG_INT_RX);
+        rt_device_set_rx_indicate(hw_device, rt_link_port_rx_ind);
+    }
+    else
+    {
+        LOG_E("Not find device %s", RT_LINK_HW_DEVICE_NAME);
+        return -RT_ERROR;
+    }
+    return RT_EOK;
+}
+
+int rt_link_port_deinit(void)
+{
+    hw_device = rt_device_find(RT_LINK_HW_DEVICE_NAME);
+    if (hw_device)
+    {
+        rt_device_close(hw_device);
+        rt_device_set_rx_indicate(hw_device, RT_NULL);
+    }
+    else
+    {
+        LOG_E("Not find device %s", RT_LINK_HW_DEVICE_NAME);
+        return -RT_ERROR;
+    }
+    return RT_EOK;
+}

components/utilities/rt-link/inc/rtlink.h

+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-02-02     xiangxistu   the first version
+ * 2021-03-19     Sherman      Streamline the struct rt_link_session
+ */
+
+#ifndef __RT_LINK_H__
+#define __RT_LINK_H__
+
+#include <rtdef.h>
+
+#define RT_LINK_AUTO_INIT
+
+#define RT_LINK_FRAME_HEAD                 0x15
+#define RT_LINK_FRAME_HEAD_MASK            0x1F
+#define RT_LINK_MAX_DATA_LENGTH            2044 /*can exact divide by 4 bytes*/
+#define RT_LINK_FRAMES_MAX   0x03   /* The maximum number of split frames for a long package*/
+
+#define RT_LINK_ACK_MAX   0x07
+#define RT_LINK_CRC_LENGTH          4
+#define RT_LINK_HEAD_LENGTH         4
+#define RT_LINK_MAX_EXTEND_LENGTH       4
+#define RT_LINK_MAX_FRAME_LENGTH        (RT_LINK_HEAD_LENGTH + RT_LINK_MAX_EXTEND_LENGTH + RT_LINK_MAX_DATA_LENGTH + RT_LINK_CRC_LENGTH)
+#define RT_LINK_RECEIVE_BUFFER_LENGTH       (RT_LINK_MAX_FRAME_LENGTH * RT_LINK_FRAMES_MAX + RT_LINK_HEAD_LENGTH + RT_LINK_MAX_EXTEND_LENGTH)
+
+typedef enum
+{
+    RT_LINK_SERVICE_RTLINK = 0,
+    RT_LINK_SERVICE_LINK_SOCKET = 1,
+    RT_LINK_SERVICE_LINK_WIFI = 2,
+    RT_LINK_SERVICE_LINK_MNGT = 3,
+    RT_LINK_SERVICE_LINK_MSHTOOLS = 4,
+    RT_LINK_SERVICE_MAX
+} rt_link_service_t;
+
+enum
+{
+    FRAME_EXTEND = 1 << 0,
+    FRAME_CRC    = 1 << 1,
+    FRAME_ACK    = 1 << 2
+};
+
+typedef enum
+{
+    RT_LINK_RESERVE_FRAME = 0,
+
+    RT_LINK_RESEND_FRAME,
+    RT_LINK_CONFIRM_FRAME,
+    RT_LINK_SHORT_DATA_FRAME,
+    RT_LINK_LONG_DATA_FRAME,
+    RT_LINK_SESSION_END,  /* The retring failed to end the session */
+
+    RT_LINK_HANDSHAKE_FRAME
+} rt_link_frame_attribute_t;
+
+typedef enum
+{
+    /* receive event */
+    RT_LINK_READ_CHECK_EVENT            = 1 << 0,
+    RT_LINK_RECV_TIMEOUT_FRAME_EVENT    = 1 << 1,
+    RT_LINK_RECV_TIMEOUT_LONG_EVENT     = 1 << 2,
+
+    /* send event */
+    RT_LINK_SEND_READY_EVENT    = 1 << 4,
+    RT_LINK_SEND_OK_EVENT       = 1 << 5,
+    RT_LINK_SEND_FAILED_EVENT   = 1 << 6,
+    RT_LINK_SEND_TIMEOUT_EVENT  = 1 << 7
+} rt_link_notice_t;
+
+typedef enum
+{
+    RT_LINK_ESTABLISHING = 0,
+    RT_LINK_NO_RESPONSE,
+    RT_LINK_CONNECT_DONE,
+} rt_link_linkstatus_t;
+
+typedef enum
+{
+    RECVTIMER_NONE = 0,
+    RECVTIMER_FRAME,
+    RECVTIMER_LONGFRAME
+} rt_link_recvtimer_status_t;
+
+struct rt_link_receive_buffer
+{
+    rt_uint8_t data[RT_LINK_RECEIVE_BUFFER_LENGTH]; /* rt-link receive data buffer */
+    rt_uint8_t *read_point;
+    rt_uint8_t *write_point;
+    rt_uint8_t *end_point;
+};
+
+struct rt_link_frame_head
+{
+    rt_uint8_t magicid : 5;
+    rt_uint8_t extend  : 1;
+    rt_uint8_t crc     : 1;
+    rt_uint8_t ack     : 1;
+    rt_uint8_t sequence;
+    rt_uint16_t channel: 5;
+    rt_uint16_t length : 11;
+};
+
+/* record frame information that opposite */
+struct rt_link_record
+{
+    rt_uint8_t rx_seq; /* record the opposite sequence */
+    rt_uint8_t total;       /* the number of long frame number */
+    rt_uint8_t long_count;  /* long packet recv counter */
+    rt_uint8_t *dataspace;  /* the space of long frame */
+};
+
+struct rt_link_extend
+{
+    rt_uint16_t attribute;           /* rt_link_frame_attribute_t */
+    rt_uint16_t parameter;
+};
+
+struct rt_link_frame
+{
+    struct rt_link_frame_head head;         /* frame head */
+    struct rt_link_extend extend;           /* frame extend data */
+    rt_uint8_t *real_data;                  /* the origin data */
+    rt_uint32_t crc;                        /* CRC result */
+
+    rt_uint16_t data_len;         /* the length of frame length */
+    rt_uint16_t attribute;        /* this will show frame attribute , rt_link_frame_attribute_t */
+
+    rt_uint8_t index;              /* the index frame for long frame */
+    rt_uint8_t total;               /* the total frame for long frame */
+
+    rt_slist_t slist;            /* the frame will hang on the send list on session */
+};
+
+struct rt_link_service
+{
+    rt_err_t (*upload_callback)(void *data, rt_size_t size);
+};
+
+struct rt_link_session
+{
+    rt_link_linkstatus_t link_status;   /* Link connection status*/
+    struct rt_event event;      /* the event that core logic */
+    struct rt_link_service channel[RT_LINK_SERVICE_MAX]; /* thansfer to app layer */
+
+    rt_slist_t tx_data_slist;
+    rt_uint8_t tx_seq;     /* sequence for frame */
+    struct rt_mutex tx_lock;    /* protect send data interface, only one thread can hold it */
+    struct rt_timer sendtimer;  /* send function timer for rt link */
+
+    struct rt_link_record rx_record;    /* the memory of receive status */
+    struct rt_timer recvtimer;          /* receive a frame timer for rt link */
+    struct rt_timer longframetimer;     /* receive long frame timer for rt link */
+
+    struct rt_link_receive_buffer *rx_buffer; /* the buffer will store data */
+    rt_uint32_t (*calculate_crc)(rt_uint8_t using_buffer_ring, rt_uint8_t *data, rt_size_t size); /* this function will calculate crc */
+};
+
+/* rtlink init and deinit */
+int rt_link_init(void);
+rt_err_t rt_link_deinit(void);
+/* rtlink send data interface */
+rt_size_t rt_link_send(rt_link_service_t service, void *data, rt_size_t size);
+/* rtlink service attach and detach */
+rt_err_t rt_link_service_attach(rt_link_service_t service, rt_err_t (*function)(void *data, rt_size_t size));
+rt_err_t rt_link_service_detach(rt_link_service_t service);
+
+/* Private operator function */
+struct rt_link_session *rt_link_get_scb(void);
+
+#endif /* __RT_LINK_H__ */

components/utilities/rt-link/inc/rtlink_hw.h

+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-02-02     xiangxistu   the first version
+ *
+ */
+#ifndef __RT_LINK_HW_H__
+#define __RT_LINK_HW_H__
+
+#include <rtdef.h>
+
+rt_size_t rt_link_hw_recv_len(struct rt_link_receive_buffer *buffer);
+void rt_link_hw_copy(rt_uint8_t *dst, rt_uint8_t *src, rt_size_t count);
+void rt_link_hw_buffer_point_shift(rt_uint8_t **pointer_address, rt_size_t length);
+
+rt_err_t rt_link_hw_init(void);
+rt_err_t rt_link_hw_deinit(void);
+rt_err_t rt_link_hw_send(void *data, rt_size_t length);
+
+#endif /* _RT_LINK_PORT_INTERNAL_H_ */

components/utilities/rt-link/inc/rtlink_port.h

+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-02-02     xiangxistu   the first version
+ * 2021-05-15     Sherman      function rename
+ */
+#ifndef __RT_LINK_PORT_H__
+#define __RT_LINK_PORT_H__
+
+#include <rtdef.h>
+
+/* Functions that need to be implemented at the hardware */
+int rt_link_port_init(void);
+int rt_link_port_deinit(void);
+rt_size_t rt_link_port_send(void *data, rt_size_t length);
+
+#ifdef RT_LINK_USING_HW_CRC
+    rt_err_t rt_link_hw_crc32_init(void);
+    rt_err_t rt_link_hw_crc32_deinit(void);
+    rt_err_t rt_link_hw_crc32_reset(void);
+    rt_uint32_t rt_link_hw_crc32(rt_uint8_t *data, rt_size_t u32_size)
+#endif
+
+/* Called when the hardware receives data and the data is transferred to RTLink */
+rt_size_t rt_link_hw_write_cb(void *data, rt_size_t length);
+
+#endif /* __RT_LINK_PORT_H__ */

components/utilities/rt-link/inc/rtlink_utils.h

+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-05-15     Sherman      the first version
+ */
+#ifndef __RT_LINK_UTILITIES_H__
+#define __RT_LINK_UTILITIES_H__
+
+#include <rtthread.h>
+
+/* Calculate the number of '1' */
+int rt_link_utils_num1(rt_uint32_t n);
+
+rt_err_t rt_link_sf_crc32_reset(void);
+rt_uint32_t rt_link_sf_crc32(rt_uint8_t *data, rt_size_t len);
+
+#endif /* __RT_LINK_UTILITIES_H__ */

components/utilities/rt-link/src/SConscript

+Import('rtconfig')
+from building import *
+
+cwd = GetCurrentDir()
+src = Glob('*.c')
+CPPPATH = [cwd + '/../inc']
+
+group = DefineGroup('rt-link', src, depend = ['RT_USING_RT_LINK'], CPPPATH = CPPPATH)
+
+if os.path.isfile(os.path.join(cwd, 'hw', 'SConscript')):
+    group = group + SConscript(os.path.join('hw', 'SConscript'))
+
+Return('group')

components/utilities/rt-link/src/rtlink_hw.c

+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-02-02     xiangxistu   the first version
+ * 2021-05-08     Sherman      Optimize the operation function on the rt_link_receive_buffer
+ */
+
+#include <rtthread.h>
+
+#include <rtlink.h>
+#include <rtlink_hw.h>
+#include <rtlink_port.h>
+#include <rtlink_utils.h>
+
+#define DBG_TAG "rtlink_hw"
+#ifdef USING_RT_LINK_HW_DEBUG
+    #define DBG_LVL DBG_LOG
+#else
+    #define DBG_LVL DBG_INFO
+#endif
+#define DBG_COLOR
+#include <rtdbg.h>
+
+static struct rt_link_receive_buffer *rx_buffer = RT_NULL;
+
+struct rt_link_receive_buffer *rt_link_hw_buffer_init(void *parameter)
+{
+    rx_buffer = rt_malloc(sizeof(struct rt_link_receive_buffer));
+    if (rx_buffer != RT_NULL)
+    {
+        rt_memset(rx_buffer, 0, sizeof(struct rt_link_receive_buffer));
+        rx_buffer->read_point = rx_buffer->data;
+        rx_buffer->write_point = rx_buffer->data;
+        rx_buffer->end_point = rx_buffer->data + RT_LINK_RECEIVE_BUFFER_LENGTH; /* Point to memory that has no access rights */
+    }
+    else
+    {
+        LOG_E("receive buffer alloc failed, init failed.");
+    }
+
+    return rx_buffer;
+}
+
+static rt_size_t rt_link_hw_buffer_write(void *data, rt_size_t count)
+{
+    int surplus = 0;
+    if (rx_buffer == RT_NULL)
+    {
+        return 0;
+    }
+    /* (data)----(r)----(w)----(end) */
+    if (rx_buffer->write_point >= rx_buffer->read_point)
+    {
+        rt_size_t w2end = rx_buffer->end_point - rx_buffer->write_point;
+        surplus = RT_LINK_RECEIVE_BUFFER_LENGTH - (rx_buffer->write_point - rx_buffer->read_point);
+        count = count > surplus ? surplus : count;
+        if (count >= w2end)
+        {
+            rt_memcpy(rx_buffer->write_point, data, w2end);
+            rx_buffer->write_point = rx_buffer->data;
+
+            rt_memcpy(rx_buffer->write_point, (rt_uint8_t *)data + w2end, (count - w2end));
+            rx_buffer->write_point += (count - w2end);
+        }
+        else
+        {
+            rt_memcpy(rx_buffer->write_point, data, count);
+            rx_buffer->write_point += count;
+        }
+    }
+    else    /* (data)----(w)----(r)----(end) */
+    {
+        surplus = rx_buffer->read_point - rx_buffer->write_point;
+        count = count > surplus ? surplus : count;
+        rt_memcpy(rx_buffer->write_point, data, count);
+        rx_buffer->write_point += count;
+    }
+    return count;
+}
+
+/* increases buffer pointer by one and circle around if necessary */
+void rt_link_hw_buffer_point_shift(rt_uint8_t **pointer_address, rt_size_t length)
+{
+    rt_uint8_t *pointer = RT_NULL;
+
+    pointer = *pointer_address + length;
+    if (pointer >= rx_buffer->end_point)
+    {
+        rt_size_t offset = 0;
+        offset = pointer - rx_buffer->end_point;
+        *pointer_address = rx_buffer->data + offset;
+    }
+    else
+    {
+        *pointer_address = *pointer_address + length;
+    }
+}
+
+/* copy data from receive buffer */
+void rt_link_hw_copy(rt_uint8_t *dst, rt_uint8_t *src, rt_size_t count)
+{
+    rt_uint8_t *pointer = RT_NULL;
+
+    pointer = src + count;
+    if (pointer >= rx_buffer->end_point)
+    {
+        rt_size_t offset = 0;
+        offset = rx_buffer->end_point - src;
+        rt_memcpy(dst, src, offset);
+        rt_memcpy(dst + offset,  rx_buffer->data, pointer - rx_buffer->end_point);
+    }
+    else
+    {
+        rt_memcpy(dst, src, count);
+    }
+}
+
+/* Tells, how many chars are saved into the buffer */
+rt_size_t rt_link_hw_recv_len(struct rt_link_receive_buffer *buffer)
+{
+    if (buffer->write_point >= buffer->read_point)
+    {
+        return (buffer->write_point - buffer->read_point);
+    }
+    else
+    {
+        return (RT_LINK_RECEIVE_BUFFER_LENGTH - (buffer->read_point - buffer->write_point));
+    }
+}
+
+rt_err_t rt_link_reset_crc32(void)
+{
+#ifdef RT_LINK_USING_HW_CRC
+    return rt_link_hw_crc32_reset();
+#else
+    return rt_link_sf_crc32_reset();
+#endif
+}
+
+rt_uint32_t rt_link_crc32(rt_uint8_t *data, rt_size_t u32_size)
+{
+#ifdef RT_LINK_USING_HW_CRC
+    return rt_link_hw_crc32(data, u32_size);
+#else
+    return rt_link_sf_crc32(data, u32_size);
+#endif
+}
+
+rt_uint32_t rt_link_get_crc(rt_uint8_t using_buffer_ring, rt_uint8_t *data, rt_size_t size)
+{
+    rt_uint32_t crc32 = 0x0;
+    rt_size_t surplus = 0;
+
+    if (data == RT_NULL)
+    {
+        LOG_D("warning, the parameter error: %d, data: 0x%08d.", size, data);
+        return 0;
+    }
+
+    rt_link_reset_crc32();
+    if (using_buffer_ring == 1)
+    {
+        /* modify the missing character */
+        surplus = rx_buffer->end_point - data;
+        if (surplus >= size)
+        {
+            crc32 = rt_link_crc32(data, size);
+        }
+        else
+        {
+            rt_link_crc32(data, surplus);
+            crc32 = rt_link_crc32(rx_buffer->data, size - surplus);
+        }
+    }
+    else
+    {
+        crc32 = rt_link_crc32(data, size);
+    }
+    return crc32;
+}
+
+rt_err_t rt_link_hw_send(void *data, rt_size_t length)
+{
+    rt_size_t send_len = 0;
+    send_len = rt_link_port_send(data, length);
+    LOG_D("hw_send len= %d", send_len);
+    return send_len;
+}
+
+/* provide this function to hardware spi/uart/usb to store data */
+rt_size_t rt_link_hw_write_cb(void *data, rt_size_t length)
+{
+    /* write real data into rtlink receive buffer */
+    rt_size_t len = rt_link_hw_buffer_write(data, length);
+    struct rt_link_session *scb = rt_link_get_scb();
+    if (scb)
+    {
+        rt_event_send(&scb->event, RT_LINK_READ_CHECK_EVENT);
+    }
+    return len;
+}
+
+rt_err_t rt_link_hw_init(void)
+{
+    struct rt_link_session *scb = rt_link_get_scb();
+    if ((rx_buffer != RT_NULL) || (scb == RT_NULL))
+    {
+        return -RT_ERROR;
+    }
+
+    /* alloc receive buffer to store data */
+    if (rt_link_hw_buffer_init(RT_NULL) == RT_NULL)
+    {
+        return -RT_ENOMEM;
+    }
+    scb->rx_buffer = rx_buffer;
+    scb->calculate_crc = rt_link_get_crc;
+
+    rt_link_port_init();
+
+#ifdef LINK_LAYER_USING_HW_CRC
+    /* crc hardware device for mcu and node */
+    rt_link_hw_crc32_init();
+#endif
+
+    LOG_I("link layer hardware environment init successful.");
+    return RT_EOK;
+}
+
+rt_err_t rt_link_hw_deinit(void)
+{
+    if (rx_buffer)
+    {
+        rt_free(rx_buffer);
+        rx_buffer = RT_NULL;
+    }
+    struct rt_link_session *scb = rt_link_get_scb();
+    if (scb)
+    {
+        scb->rx_buffer = rx_buffer;
+        scb->calculate_crc = RT_NULL;
+    }
+    rt_link_port_deinit();
+
+#ifdef LINK_LAYER_USING_HW_CRC
+    /* crc hardware device for mcu and node */
+    rt_link_hw_crc32_deinit();
+#endif
+
+    LOG_I("rtlink hardware deinit successful.");
+    return RT_EOK;
+}

components/utilities/rt-link/src/rtlink_utils.c

+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-05-15     Sherman      the first version
+ */
+
+#include <rtlink_utils.h>
+
+/* Calculate the number of '1' */
+int rt_link_utils_num1(rt_uint32_t n)
+{
+    int ret = 0;
+    while (n)
+    {
+        n &= n - 1;
+        ret++;
+    }
+    return ret;
+}
+
+#ifdef RT_LINK_USING_SF_CRC
+
+static rt_uint32_t crc = 0xffffffff;
+const rt_uint32_t crc_table[256] =
+{
+    0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419,
+    0x706AF48F, 0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
+    0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2, 0xF3B97148,
+    0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, 0x136C9856, 0x646BA8C0,
+    0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8,
+    0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
+    0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF,
+    0xABD13D59, 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423,
+    0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87,
+    0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A,
+    0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433, 0x7807C9A2, 0x0F00F934, 0x9609A88E,
+    0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162,
+    0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6,
+    0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
+    0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D,
+    0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5,
+    0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525,
+    0x206F85B3, 0xB966D409, 0xCE61E49F, 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4,
+    0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C,
+    0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84,
+    0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, 0xF00F9344,
+    0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
+    0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43,
+    0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767,
+    0x3FB506DD, 0x48B2364B, 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3,
+    0xA867DF55, 0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
+    0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92,
+    0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, 0x9B64C2B0, 0xEC63F226,
+    0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713, 0x95BF4A82,
+    0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
+    0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1,
+    0x18B74777, 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69,
+    0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661,
+    0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0,
+    0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9, 0xBDBDF21C, 0xCABAC28A, 0x53B39330,
+    0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8,
+    0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
+};
+
+rt_err_t rt_link_sf_crc32_reset(void)
+{
+    crc = 0xffffffff;
+    return RT_EOK;
+}
+
+rt_uint32_t rt_link_sf_crc32(rt_uint8_t *data, rt_size_t len)
+{
+    rt_uint32_t x, y;
+    x = 0;
+    y = 0;
+    rt_size_t i;
+
+    for (i = 0; i < len; i++)
+    {
+        y = (crc ^ data[i]) & 0xff;
+        x = crc_table[y];
+        crc = (crc >> 8) ^ x;
+    }
+    return (crc ^ 0xffffffff);
+}
+#endif /* RT_LINK_USING_SF_CRC */