[bsp][stm32][airm2m]<pin>更新pin num命令 (#7390)

1 files changed, 7 insertions, 3 deletions

diff --git a/bsp/stm32/libraries/HAL_Drivers/drv_gpio.c b/bsp/stm32/libraries/HAL_Drivers/drv_gpio.c
index 8b020f5402..d58b9c9557 100644
--- a/bsp/stm32/libraries/HAL_Drivers/drv_gpio.c
+++ b/bsp/stm32/libraries/HAL_Drivers/drv_gpio.c
@@ -172,11 +172,11 @@ static rt_base_t stm32_pin_get(const char *name)
 
     if ((name_len < 4) || (name_len >= 6))
     {
-        return -RT_EINVAL;
+        goto out;
     }
     if ((name[0] != 'P') || (name[2] != '.'))
     {
-        return -RT_EINVAL;
+        goto out;
     }
 
     if ((name[1] >= 'A') && (name[1] <= 'Z'))
@@ -185,7 +185,7 @@ static rt_base_t stm32_pin_get(const char *name)
     }
     else
     {
-        return -RT_EINVAL;
+        goto out;
     }
 
     for (i = 3; i < name_len; i++)
@@ -197,6 +197,10 @@ static rt_base_t stm32_pin_get(const char *name)
     pin = PIN_NUM(hw_port_num, hw_pin_num);
 
     return pin;
+
+out:
+    rt_kprintf("Px.y  x:A~Z  y:0-15, e.g. PA.0\n");
+    return -RT_EINVAL;
 }
 
 static void stm32_pin_write(rt_device_t dev, rt_base_t pin, rt_uint8_t value)