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-rwxr-xr-xcomponents/drivers/Kconfig4
-rw-r--r--components/drivers/include/drivers/alarm.h7
-rw-r--r--components/drivers/include/drivers/phy.h87
-rw-r--r--components/drivers/include/drivers/phy_mdio.h43
-rw-r--r--components/drivers/include/rtdevice.h5
-rw-r--r--components/drivers/phy/SConscript8
-rw-r--r--components/drivers/phy/phy.c78
-rw-r--r--components/drivers/rtc/alarm.c150
-rw-r--r--components/drivers/usb/usbhost/class/udisk.c2
-rw-r--r--components/drivers/usb/usbhost/core/hub.c15
-rw-r--r--components/finsh/cmd.c1
-rw-r--r--components/libc/compilers/armlibc/README.md9
-rw-r--r--components/libc/compilers/common/readme.md2
-rw-r--r--components/libc/compilers/dlib/README.md7
-rw-r--r--components/libc/compilers/newlib/README.md9
-rw-r--r--components/net/at/src/at_client.c5
16 files changed, 416 insertions, 16 deletions
diff --git a/components/drivers/Kconfig b/components/drivers/Kconfig
index 457b8751fe..db4455160e 100755
--- a/components/drivers/Kconfig
+++ b/components/drivers/Kconfig
@@ -103,6 +103,10 @@ if RT_USING_I2C
endif
endif
+config RT_USING_PHY
+ bool "Using ethernet phy device drivers"
+ default n
+
config RT_USING_PIN
bool "Using generic GPIO device drivers"
default y
diff --git a/components/drivers/include/drivers/alarm.h b/components/drivers/include/drivers/alarm.h
index b5ebbc86d9..dd59f4c1e8 100644
--- a/components/drivers/include/drivers/alarm.h
+++ b/components/drivers/include/drivers/alarm.h
@@ -6,6 +6,8 @@
* Change Logs:
* Date Author Notes
* 2012-10-27 heyuanjie87 first version.
+ * 2013-05-17 aozima initial alarm event & mutex in system init.
+ * 2020-10-15 zhangsz add alarm flags hour minute second.
*/
#ifndef __ALARM_H__
@@ -22,6 +24,9 @@
#define RT_ALARM_WEEKLY 0x200 /* alarm weekly at Monday or Friday etc. */
#define RT_ALARM_MONTHLY 0x400 /* alarm monthly at someday */
#define RT_ALARM_YAERLY 0x800 /* alarm yearly at a certain date */
+#define RT_ALARM_HOUR 0x1000 /* alarm each hour at a certain min:second */
+#define RT_ALARM_MINUTE 0x2000 /* alarm each minute at a certain second */
+#define RT_ALARM_SECOND 0x4000 /* alarm each second */
/* alarm control cmd */
#define RT_ALARM_CTRL_MODIFY 1 /* modify alarm time or alarm flag */
@@ -67,6 +72,6 @@ void rt_alarm_update(rt_device_t dev, rt_uint32_t event);
rt_err_t rt_alarm_delete(rt_alarm_t alarm);
rt_err_t rt_alarm_start(rt_alarm_t alarm);
rt_err_t rt_alarm_stop(rt_alarm_t alarm);
-void rt_alarm_system_init(void);
+int rt_alarm_system_init(void);
#endif /* __ALARM_H__ */
diff --git a/components/drivers/include/drivers/phy.h b/components/drivers/include/drivers/phy.h
new file mode 100644
index 0000000000..2d1ad9f91f
--- /dev/null
+++ b/components/drivers/include/drivers/phy.h
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date Author Notes
+ * 2020-10-14 wangqiang the first version
+ */
+
+#ifndef __PHY_H__
+#define __PHY_H__
+
+#include <rtthread.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/* Defines the PHY link speed. This is align with the speed for MAC. */
+enum phy_speed
+{
+ PHY_SPEED_10M = 0U, /* PHY 10M speed. */
+ PHY_SPEED_100M /* PHY 100M speed. */
+};
+
+/* Defines the PHY link duplex. */
+enum phy_duplex
+{
+ PHY_HALF_DUPLEX = 0U, /* PHY half duplex. */
+ PHY_FULL_DUPLEX /* PHY full duplex. */
+};
+
+/*! @brief Defines the PHY loopback mode. */
+enum phy_loop
+{
+ PHY_LOCAL_LOOP = 0U, /* PHY local loopback. */
+ PHY_REMOTE_LOOP /* PHY remote loopback. */
+};
+
+
+struct rt_phy_msg
+{
+ rt_uint32_t reg;
+ rt_uint32_t value;
+};
+
+typedef struct rt_phy_msg rt_phy_msg_t;
+
+
+struct rt_phy_device
+{
+ struct rt_device parent;
+ struct rt_mdio_bus *bus;
+ rt_uint32_t addr;
+ struct rt_phy_ops *ops;
+};
+
+typedef struct rt_phy_device rt_phy_t;
+
+
+enum {
+ PHY_STATUS_OK = 0,
+ PHY_STATUS_FAIL,
+ PHY_STATUS_TIMEOUT,
+};
+
+typedef rt_int32_t rt_phy_status;
+
+struct rt_phy_ops
+{
+ rt_phy_status (*init)(void *object, rt_uint32_t phy_addr, rt_uint32_t src_clock_hz);
+ rt_phy_status (*read)(rt_uint32_t reg, rt_uint32_t *data);
+ rt_phy_status (*write)(rt_uint32_t reg, rt_uint32_t data);
+ rt_phy_status (*loopback)(rt_uint32_t mode, rt_uint32_t speed, rt_bool_t enable);
+ rt_phy_status (*get_link_status)(rt_bool_t *status);
+ rt_phy_status (*get_link_speed_duplex)(rt_uint32_t *speed, rt_uint32_t *duplex);
+};
+
+rt_err_t rt_hw_phy_register(struct rt_phy_device *phy, const char *name);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __PHY_H__*/
diff --git a/components/drivers/include/drivers/phy_mdio.h b/components/drivers/include/drivers/phy_mdio.h
new file mode 100644
index 0000000000..d978ec2984
--- /dev/null
+++ b/components/drivers/include/drivers/phy_mdio.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date Author Notes
+ * 2020-10-14 wangqiang the first version
+ */
+
+#ifndef __MDIO_H__
+#define __MDIO_H__
+
+#include <rtthread.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+
+struct rt_mdio_bus_ops
+{
+ rt_bool_t (*init)(void *bus, rt_uint32_t src_clock_hz);
+ rt_size_t (*read)(void *bus, rt_uint32_t addr, rt_uint32_t reg, void *data, rt_uint32_t size);
+ rt_size_t (*write)(void *bus, rt_uint32_t addr, rt_uint32_t reg, void *data, rt_uint32_t size);
+ rt_bool_t (*uninit)(void *bus);
+};
+
+struct rt_mdio_bus
+{
+ void *hw_obj;
+ char *name;
+ struct rt_mdio_bus_ops *ops;
+};
+
+typedef struct rt_mdio_bus rt_mdio_t;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/components/drivers/include/rtdevice.h b/components/drivers/include/rtdevice.h
index f54290097c..f0fa2f5b4a 100644
--- a/components/drivers/include/rtdevice.h
+++ b/components/drivers/include/rtdevice.h
@@ -69,6 +69,11 @@ extern "C" {
#endif /* RT_USING_I2C_BITOPS */
#endif /* RT_USING_I2C */
+#ifdef RT_USING_PHY
+#include "drivers/phy.h"
+#include "drivers/phy_mdio.h"
+#endif /* RT_USING_PHY */
+
#ifdef RT_USING_SDIO
#include "drivers/mmcsd_core.h"
#include "drivers/sd.h"
diff --git a/components/drivers/phy/SConscript b/components/drivers/phy/SConscript
new file mode 100644
index 0000000000..ec12ed24c2
--- /dev/null
+++ b/components/drivers/phy/SConscript
@@ -0,0 +1,8 @@
+from building import *
+
+cwd = GetCurrentDir()
+src = Glob('*.c')
+CPPPATH = [cwd + '/../include']
+group = DefineGroup('DeviceDrivers', src, depend = ['RT_USING_PHY'], CPPPATH = CPPPATH)
+
+Return('group')
diff --git a/components/drivers/phy/phy.c b/components/drivers/phy/phy.c
new file mode 100644
index 0000000000..3ed4a1a265
--- /dev/null
+++ b/components/drivers/phy/phy.c
@@ -0,0 +1,78 @@
+
+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date Author Notes
+ * 2020-09-27 wangqiang first version
+ */
+
+#include <rthw.h>
+#include <rtthread.h>
+#include <rtdevice.h>
+
+#define DBG_TAG "PHY"
+#define DBG_LVL DBG_INFO
+#include <rtdbg.h>
+
+
+static rt_size_t phy_device_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t count)
+{
+ struct rt_phy_device *phy = (struct rt_phy_device *)dev->user_data;
+ struct rt_phy_msg *msg = (struct rt_phy_msg *)buffer;
+ return phy->bus->ops->read(phy->bus, phy->addr, msg->reg, &(msg->value), 4);
+}
+static rt_size_t phy_device_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t count)
+{
+ struct rt_phy_device *phy = (struct rt_phy_device *)dev->user_data;
+ struct rt_phy_msg *msg = (struct rt_phy_msg *)buffer;
+ return phy->bus->ops->write(phy->bus, phy->addr, msg->reg, &(msg->value), 4);
+}
+
+
+
+#ifdef RT_USING_DEVICE_OPS
+const static struct rt_device_ops phy_ops =
+{
+ RT_NULL,
+ RT_NULL,
+ RT_NULL,
+ phy_device_read,
+ phy_device_write,
+ RT_NULL,
+};
+#endif
+
+/*
+* phy device register
+*/
+rt_err_t rt_hw_phy_register(struct rt_phy_device *phy, const char *name)
+{
+ rt_err_t ret;
+ struct rt_device *device;
+
+ device = &(phy->parent);
+
+ device->type = RT_Device_Class_PHY;
+ device->rx_indicate = RT_NULL;
+ device->tx_complete = RT_NULL;
+
+#ifdef RT_USING_DEVICE_OPS
+ device->ops = phy_ops;
+#else
+ device->init = NULL;
+ device->open = NULL;
+ device->close = NULL;
+ device->read = phy_device_read;
+ device->write = phy_device_write;
+ device->control = NULL;
+#endif
+ device->user_data = phy;
+
+ /* register a character device */
+ ret = rt_device_register(device, name, RT_DEVICE_FLAG_RDWR);
+
+ return ret;
+}
diff --git a/components/drivers/rtc/alarm.c b/components/drivers/rtc/alarm.c
index c497ebf727..71b6e7236a 100644
--- a/components/drivers/rtc/alarm.c
+++ b/components/drivers/rtc/alarm.c
@@ -7,6 +7,7 @@
* Date Author Notes
* 2012-10-27 heyuanjie87 first version.
* 2013-05-17 aozima initial alarm event & mutex in system init.
+ * 2020-10-15 zhangsz add alarm flags hour minute second.
*/
#include <rtthread.h>
@@ -97,6 +98,61 @@ static void alarm_wakeup(struct rt_alarm *alarm, struct tm *now)
}
}
break;
+ case RT_ALARM_SECOND:
+ {
+ alarm->wktime.tm_hour = now->tm_hour;
+ alarm->wktime.tm_min = now->tm_min;
+ alarm->wktime.tm_sec = alarm->wktime.tm_sec + 1;
+ if (alarm->wktime.tm_sec > 59)
+ {
+ alarm->wktime.tm_sec = 0;
+ alarm->wktime.tm_min = alarm->wktime.tm_min + 1;
+ if (alarm->wktime.tm_min > 59)
+ {
+ alarm->wktime.tm_min = 0;
+ alarm->wktime.tm_hour = alarm->wktime.tm_hour + 1;
+ if (alarm->wktime.tm_hour > 23)
+ {
+ alarm->wktime.tm_hour = 0;
+ }
+ }
+ }
+ wakeup = RT_TRUE;
+ }
+ break;
+ case RT_ALARM_MINUTE:
+ {
+ alarm->wktime.tm_hour = now->tm_hour;
+ if (alarm->wktime.tm_sec == now->tm_sec)
+ {
+ alarm->wktime.tm_min = alarm->wktime.tm_min + 1;
+ if (alarm->wktime.tm_min > 59)
+ {
+ alarm->wktime.tm_min = 0;
+ alarm->wktime.tm_hour = alarm->wktime.tm_hour + 1;
+ if (alarm->wktime.tm_hour > 23)
+ {
+ alarm->wktime.tm_hour = 0;
+ }
+ }
+ wakeup = RT_TRUE;
+ }
+ }
+ break;
+ case RT_ALARM_HOUR:
+ {
+ if ((alarm->wktime.tm_min == now->tm_min) &&
+ (alarm->wktime.tm_sec == now->tm_sec))
+ {
+ alarm->wktime.tm_hour = alarm->wktime.tm_hour + 1;
+ if (alarm->wktime.tm_hour > 23)
+ {
+ alarm->wktime.tm_hour = 0;
+ }
+ wakeup = RT_TRUE;
+ }
+ }
+ break;
case RT_ALARM_DAILY:
{
if (((sec_now - sec_alarm) <= RT_ALARM_DELAY) && (sec_now >= sec_alarm))
@@ -177,7 +233,7 @@ static void alarm_update(rt_uint32_t event)
/* calculate seconds from 00:00:00 */
sec_alarm = alarm_mkdaysec(&alarm->wktime);
- if ((alarm->flag & RT_ALARM_STATE_START) && (alarm != _container.current))
+ if (alarm->flag & RT_ALARM_STATE_START)
{
sec_tmp = sec_alarm - sec_now;
if (sec_tmp > 0)
@@ -212,6 +268,11 @@ static void alarm_update(rt_uint32_t event)
if (alarm_set(alm_prev) == RT_EOK)
_container.current = alm_prev;
}
+ else
+ {
+ if (_container.current != RT_NULL)
+ alarm_set(_container.current);
+ }
}
rt_mutex_release(&_container.mutex);
}
@@ -279,6 +340,51 @@ static rt_err_t alarm_setup(rt_alarm_t alarm, struct tm *wktime)
switch (alarm->flag & 0xFF00)
{
+ case RT_ALARM_SECOND:
+ {
+ alarm->wktime.tm_hour = now.tm_hour;
+ alarm->wktime.tm_min = now.tm_min;
+ alarm->wktime.tm_sec = now.tm_sec + 1;
+ if (alarm->wktime.tm_sec > 59)
+ {
+ alarm->wktime.tm_sec = 0;
+ alarm->wktime.tm_min = alarm->wktime.tm_min + 1;
+ if (alarm->wktime.tm_min > 59)
+ {
+ alarm->wktime.tm_min = 0;
+ alarm->wktime.tm_hour = alarm->wktime.tm_hour + 1;
+ if (alarm->wktime.tm_hour > 23)
+ {
+ alarm->wktime.tm_hour = 0;
+ }
+ }
+ }
+ }
+ break;
+ case RT_ALARM_MINUTE:
+ {
+ alarm->wktime.tm_hour = now.tm_hour;
+ alarm->wktime.tm_min = now.tm_min + 1;
+ if (alarm->wktime.tm_min > 59)
+ {
+ alarm->wktime.tm_min = 0;
+ alarm->wktime.tm_hour = alarm->wktime.tm_hour + 1;
+ if (alarm->wktime.tm_hour > 23)
+ {
+ alarm->wktime.tm_hour = 0;
+ }
+ }
+ }
+ break;
+ case RT_ALARM_HOUR:
+ {
+ alarm->wktime.tm_hour = now.tm_hour + 1;
+ if (alarm->wktime.tm_hour > 23)
+ {
+ alarm->wktime.tm_hour = 0;
+ }
+ }
+ break;
case RT_ALARM_DAILY:
{
/* do nothing but needed */
@@ -426,17 +532,17 @@ rt_err_t rt_alarm_start(rt_alarm_t alarm)
if (alarm == RT_NULL)
return (ret);
rt_mutex_take(&_container.mutex, RT_WAITING_FOREVER);
- if (!(alarm->flag & RT_ALARM_STATE_INITED))
+
+ if (!(alarm->flag & RT_ALARM_STATE_START))
{
if (alarm_setup(alarm, &alarm->wktime) != RT_EOK)
goto _exit;
- }
- if ((alarm->flag & 0x01) == RT_ALARM_STATE_STOP)
- {
+
timestamp = time(RT_NULL);
localtime_r(&timestamp, &now);
alarm->flag |= RT_ALARM_STATE_START;
+
/* set alarm */
if (_container.current == RT_NULL)
{
@@ -518,10 +624,10 @@ _exit:
*/
rt_err_t rt_alarm_delete(rt_alarm_t alarm)
{
- rt_err_t ret = RT_ERROR;
+ rt_err_t ret = RT_EOK;
if (alarm == RT_NULL)
- return (ret);
+ return RT_ERROR;
rt_mutex_take(&_container.mutex, RT_WAITING_FOREVER);
/* stop the alarm */
alarm->flag &= ~RT_ALARM_STATE_START;
@@ -551,9 +657,11 @@ rt_alarm_t rt_alarm_create(rt_alarm_callback_t callback, struct rt_alarm_setup *
if (setup == RT_NULL)
return (RT_NULL);
+
alarm = rt_malloc(sizeof(struct rt_alarm));
if (alarm == RT_NULL)
return (RT_NULL);
+
rt_list_init(&alarm->list);
alarm->wktime = setup->wktime;
@@ -586,13 +694,33 @@ static void rt_alarmsvc_thread_init(void *param)
}
}
+void rt_alarm_dump(void)
+{
+ rt_list_t *next;
+ rt_alarm_t alarm;
+ rt_uint8_t index = 0;
+
+ rt_kprintf("| alarm_id | YYYY-MM-DD hh:mm:ss | weekday | flags |\n");
+ rt_kprintf("+----------+---------------------+---------+---------+\n");
+ for (next = _container.head.next; next != &_container.head; next = next->next)
+ {
+ alarm = rt_list_entry(next, struct rt_alarm, list);
+ rt_kprintf("| No %5d | %04d-%02d-%02d %02d:%02d:%02d | %7d | 0x%04x |\n",
+ index++, alarm->wktime.tm_year + 1900, alarm->wktime.tm_mon + 1, alarm->wktime.tm_mday,
+ alarm->wktime.tm_hour, alarm->wktime.tm_min, alarm->wktime.tm_sec,
+ alarm->wktime.tm_wday, alarm->flag);
+ }
+ rt_kprintf("+----------+---------------------+---------+---------+\n");
+}
+
+FINSH_FUNCTION_EXPORT_ALIAS(rt_alarm_dump, __cmd_alarm_dump, dump alarm info);
/** \brief initialize alarm service system
*
* \param none
* \return none
*/
-void rt_alarm_system_init(void)
+int rt_alarm_system_init(void)
{
rt_thread_t tid;
@@ -602,8 +730,12 @@ void rt_alarm_system_init(void)
tid = rt_thread_create("alarmsvc",
rt_alarmsvc_thread_init, RT_NULL,
- 512, 8, 1);
+ 2048, 10, 5);
if (tid != RT_NULL)
rt_thread_startup(tid);
+
+ return 0;
}
+
+INIT_PREV_EXPORT(rt_alarm_system_init);
#endif
diff --git a/components/drivers/usb/usbhost/class/udisk.c b/components/drivers/usb/usbhost/class/udisk.c
index 1509a26105..6c8030b29a 100644
--- a/components/drivers/usb/usbhost/class/udisk.c
+++ b/components/drivers/usb/usbhost/class/udisk.c
@@ -186,7 +186,7 @@ rt_err_t rt_udisk_run(struct uhintf* intf)
{
int i = 0;
rt_err_t ret;
- char dname[4];
+ char dname[8];
char sname[8];
rt_uint8_t max_lun, *sector, sense[18], inquiry[36];
struct dfs_partition part[MAX_PARTITION_COUNT];
diff --git a/components/drivers/usb/usbhost/core/hub.c b/components/drivers/usb/usbhost/core/hub.c
index fb6cd9c406..eefa571472 100644
--- a/components/drivers/usb/usbhost/core/hub.c
+++ b/components/drivers/usb/usbhost/core/hub.c
@@ -417,8 +417,13 @@ static rt_err_t rt_usbh_hub_port_change(uhub_t hub)
if(reconnect)
{
- if(hub->child[i] != RT_NULL && hub->child[i]->status != DEV_STATUS_IDLE)
+ if(hub->child[i] != RT_NULL && hub->child[i]->status != DEV_STATUS_IDLE)
+ {
rt_usbh_detach_instance(hub->child[i]);
+
+ /* Child device have been detach. Set hub->child[i] to NULL. */
+ hub->child[i] = RT_NULL;
+ }
ret = rt_usbh_hub_port_debounce(hub, i + 1);
if(ret != RT_EOK) continue;
@@ -532,7 +537,12 @@ static rt_err_t rt_usbh_hub_enable(void *arg)
}
/* get hub ports number */
- hub->num_ports = hub->hub_desc.num_ports;
+ /* If hub device supported ports over USB_HUB_PORT_NUM(Ex: 8 port hub). Set hub->num_ports to USB_HUB_PORT_NUM */
+ if(hub->hub_desc.num_ports > USB_HUB_PORT_NUM)
+ hub->num_ports = USB_HUB_PORT_NUM;
+ else
+ hub->num_ports = hub->hub_desc.num_ports;
+
hub->hcd = device->hcd;
hub->self = device;
@@ -607,7 +617,6 @@ static rt_err_t rt_usbh_hub_disable(void* arg)
}
if(hub != RT_NULL) rt_free(hub);
- if(intf != RT_NULL) rt_free(intf);
return RT_EOK;
}
diff --git a/components/finsh/cmd.c b/components/finsh/cmd.c
index d764ea4231..afbda59e90 100644
--- a/components/finsh/cmd.c
+++ b/components/finsh/cmd.c
@@ -821,6 +821,7 @@ static char *const device_type_str[] =
"Miscellaneous Device",
"Sensor Device",
"Touch Device",
+ "Phy Device",
"Unknown"
};
diff --git a/components/libc/compilers/armlibc/README.md b/components/libc/compilers/armlibc/README.md
new file mode 100644
index 0000000000..4d2a73b6be
--- /dev/null
+++ b/components/libc/compilers/armlibc/README.md
@@ -0,0 +1,9 @@
+# ARMLIB (Keil-MDK) porting for RT-Thread
+
+Please define RT_USING_LIBC and compile RT-Thread with Keil-MDK compiler.
+
+
+
+## More Information
+
+https://www.keil.com/support/man/docs/armlib/ \ No newline at end of file
diff --git a/components/libc/compilers/common/readme.md b/components/libc/compilers/common/readme.md
index 0cd56272ff..99797d933c 100644
--- a/components/libc/compilers/common/readme.md
+++ b/components/libc/compilers/common/readme.md
@@ -1,4 +1,4 @@
-# Attention :
+## Attentions
1. This folder is "common" for armlibc newlibc and dlib. It's not "common" for minilibc.
diff --git a/components/libc/compilers/dlib/README.md b/components/libc/compilers/dlib/README.md
index 846eb3f5c0..acd08f9074 100644
--- a/components/libc/compilers/dlib/README.md
+++ b/components/libc/compilers/dlib/README.md
@@ -1,4 +1,9 @@
-Dlib(IAR) porting for RT-Thread.
+# DLIB (IAR) porting for RT-Thread
Please define RT_USING_LIBC and compile RT-Thread with IAR compiler.
+
+
+## More Information
+
+http://www.iarsys.co.jp/download/LMS2/arm/7502/ewarm7502doc/arm/doc/EWARM_DevelopmentGuide.ENU.pdf P.130 \ No newline at end of file
diff --git a/components/libc/compilers/newlib/README.md b/components/libc/compilers/newlib/README.md
new file mode 100644
index 0000000000..385f329a4f
--- /dev/null
+++ b/components/libc/compilers/newlib/README.md
@@ -0,0 +1,9 @@
+# NEWLIB (GCC) porting for RT-Thread
+
+Please define RT_USING_LIBC and compile RT-Thread with GCC compiler.
+
+
+
+## More Information
+
+https://sourceware.org/newlib/libc.html#Reentrancy \ No newline at end of file
diff --git a/components/net/at/src/at_client.c b/components/net/at/src/at_client.c
index ba4009738d..788549392d 100644
--- a/components/net/at/src/at_client.c
+++ b/components/net/at/src/at_client.c
@@ -917,6 +917,11 @@ int at_client_init(const char *dev_name, rt_size_t recv_bufsz)
RT_ASSERT(dev_name);
RT_ASSERT(recv_bufsz > 0);
+ if (at_client_get(dev_name) != RT_NULL)
+ {
+ return result;
+ }
+
for (idx = 0; idx < AT_CLIENT_NUM_MAX && at_client_table[idx].device; idx++);
if (idx >= AT_CLIENT_NUM_MAX)
generated by cgit v1.3.1 (git 2.54.0) at 2026-10-30 16:22:34 +0000