[componnets][pin]add pin operate command in MSH (#5892)

* 1. 在AT32的BSP的drv_gpio中增加了at32_pin_get函数，用于实现rt_pin_ops对象中的pin_get
2. 在MSH中增加了PIN的操作命令
3. 为了方便在MSH命令中解析字符串，增加了一些字符串相关的函数

2 files changed, 39 insertions, 1 deletions

diff --git a/bsp/at32/libraries/rt_drivers/drv_gpio.c b/bsp/at32/libraries/rt_drivers/drv_gpio.c
index b4fa19408d..9417446367 100644
--- a/bsp/at32/libraries/rt_drivers/drv_gpio.c
+++ b/bsp/at32/libraries/rt_drivers/drv_gpio.c
@@ -102,6 +102,43 @@ static uint32_t pin_irq_enable_mask = 0;
 
 #define ITEM_NUM(items) sizeof(items) / sizeof(items[0])
 
+static rt_base_t at32_pin_get(const char *name)
+{
+    rt_base_t pin = 0;
+    int hw_port_num, hw_pin_num = 0;
+    int i, name_len;
+
+    name_len = rt_strlen(name);
+
+    if ((name_len < 4) || (name_len >= 6))
+    {
+        return -RT_EINVAL;
+    }
+    if ((name[0] != 'P') || (name[2] != '.'))
+    {
+        return -RT_EINVAL;
+    }
+
+    if ((name[1] >= 'A') && (name[1] <= 'Z'))
+    {
+        hw_port_num = (int)(name[1] - 'A');
+    }
+    else
+    {
+        return -RT_EINVAL;
+    }
+
+    for (i = 3; i < name_len; i++)
+    {
+        hw_pin_num *= 10;
+        hw_pin_num += name[i] - '0';
+    }
+
+    pin = PIN_NUM(hw_port_num, hw_pin_num);
+
+    return pin;
+}
+
 static void at32_pin_write(rt_device_t dev, rt_base_t pin, rt_base_t value)
 {
     gpio_type *gpio_port;
@@ -423,7 +460,7 @@ const static struct rt_pin_ops _at32_pin_ops =
     at32_pin_attach_irq,
     at32_pin_dettach_irq,
     at32_pin_irq_enable,
-    RT_NULL,
+    at32_pin_get,
 };
 
 rt_inline void pin_irq_handler(int irqno)
diff --git a/bsp/stm32/libraries/HAL_Drivers/drv_gpio.c b/bsp/stm32/libraries/HAL_Drivers/drv_gpio.c
index ee06f26003..b50819f579 100644
--- a/bsp/stm32/libraries/HAL_Drivers/drv_gpio.c
+++ b/bsp/stm32/libraries/HAL_Drivers/drv_gpio.c
@@ -161,6 +161,7 @@ static uint32_t pin_irq_enable_mask = 0;
 
 #define ITEM_NUM(items) sizeof(items) / sizeof(items[0])
 
+/* e.g. PE.7 */
 static rt_base_t stm32_pin_get(const char *name)
 {
     rt_base_t pin = 0;